Hatch Cover
medium
34 models total
As a general type, hatch cover spans the hydraulic and mechanical folding and lift-off pontoon covers fitted to bulk carriers and general cargo ships that are not the specialised side-rolling or piggyback arrangements.
Read more — Hatch Cover explained ▾
What this general hatch cover type covers
Hatch cover as a general equipment type spans the hydraulic and mechanical cargo hold covers fitted to bulk carriers and general cargo vessels that are not the specialised side-rolling or piggyback arrangements, most commonly single- or multi-panel folding covers and lift-off pontoon covers. The choice between these sits on hold size, coaming height, and whether panels need to stay attached and fold, or be removed entirely for exceptional cargo access.
Main components
Panels
Steel plate panels stiffened by longitudinal girders, sized so that each panel's individual weight stays within the ship's or shore crane's lifting capacity where the design is a lift-off pontoon type, or within the strength of the hinge and drive system where panels stay attached and fold.
Hinges and folding linkage
On folding covers, panels are joined by hinges that let one or more panels lift and fold back on top of the adjacent panel, driven by a hydraulic cylinder acting through a linkage, or by a wire or chain system on older mechanical designs.
Lifting lugs and pad eyes
Lift-off pontoon covers are fitted with lugs for the ship's own crane or a shore crane to lift each panel clear and stack it on deck; no drive system is needed but the ship depends on lifting capacity being available.
Compression and sealing system
A rubber gasket around the coaming, compressed by cleats, wedges, or a hydraulic clamping bar, gives the weathertight seal; drainage channels at panel joints carry away any water that gets past the outer seal before it can enter the hold.
Cleating and securing
Manual or hydraulic cleats lock the closed cover against the coaming to resist green water loads and prevent the cover lifting in a seaway; on hydraulic folding covers this is usually integrated into the closing cylinder stroke.
Selection and sizing
Sizing follows hold dimensions and the vessel's cargo profile: panel weight limits set by available lifting gear for pontoon types; hinge and cylinder rating set by panel size and green water design load for folding types; coaming height and freeboard deck strength; and how often the hold needs full, unobstructed access, such as grain trimming or project cargo, versus routine bulk loading, which favours a fully opening folding cover over a partially removable pontoon arrangement.
Regulations and class
As with other hatch cover types, the International Convention on Load Lines sets the weathertight closing standard tied to the ship's freeboard, and class rules, commonly aligned with IACS UR S21, set the structural design load. Weathertightness is confirmed by hose test or ultrasonic tightness test at survey, and cover condition, including plating thickness, hinge wear, and compression bar condition, is checked as part of the hull's structural survey regime, since a leaking hatch cover is one of the most common causes of cargo claims on bulk carriers.
Typical faults
- Corroded panel plating, especially at drain channels: thickness loss found at survey, can require steel renewal before the cover passes.
- Hinge pin wear on folding covers: panels no longer close flush, leaving a gap at the joint.
- Compression bar or cleat deformation: uneven sealing pressure along the panel edge, causing localized leakage.
- Hydraulic cylinder seal failure: panel will not fully close or does not hold closed under vibration.
- Lifting lug cracking on pontoon types: found by dye penetrant or visual inspection; a lug failure during lifting risks dropping a panel.
What to look for in a supplier
- Steel grade and coating system suited to the trade, with higher corrosion allowance for cargoes that generate acidic or abrasive dust.
- Design load calculation referenced to the class rule the vessel is built and surveyed under.
- Spare gasket, cleat, and hinge pin availability matched to the installed system, especially on older vessels with discontinued designs.
- Weathertight test support at delivery and guidance for the crew's own periodic testing.
A hatch cover that looks tight when closed can still leak at the panel joints under green water pressure: judge sealing condition by the ultrasonic or hose test result, not by eye.
7 manufacturers · 34 models
Neuenfelder Maschinenfabrik
22
BPK2-6,5012
Per cargo hold design
· Cargo Hold Equipment
· hydraulic hinged hatch cover
IMO Approved
ja
Model Number
3319106 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO approved and listed in DNV approval finder, ensuring compliance with international safety standards
- Integrated drainage system allows rapid water removal before loading
- Built‑in CO₂ sensor provides early detection of hazardous atmospheres in the hold
- Robust protective coating reduces corrosion under normal service conditions
Weaknesses
- Coating may delaminate (Tankdecke‑Beschichtung Abblätterung) if not inspected regularly during docking
- Drainage channels can become blocked, requiring pre‑load testing
- CO₂ sensor drift observed; quarterly calibration is mandatory
- Ventilation grilles are prone to corrosion or blockage, affecting ventilation performance
Typical Vessels:
Bulk CarrierOil TankerChemical TankerGeneral Cargo Ship
Certifications:
IMO D-2DNV
Decision Guide: Choose if: you need a certified, hydraulically operated hatch cover with built‑in drainage and gas detection for bulk or tanker holds and are prepared to perform regular coating inspections and sensor calibrations. Avoid if: your operation cannot accommodate the required quarterly CO₂ sensor calibration or if you expect severe corrosion environments that may exceed the protective coating's lifespan.
Use Cases: The BPK2-6,5012 is typically installed on medium‑size cargo holds of bulk carriers and tankers where rapid drainage after ballast water ingress and continuous monitoring of hazardous gases are critical. It is favoured in fleets that already follow DNV standards and have maintenance programs for hatch cover coatings and gas detection equipment.
KD 1,704/0,9907,5
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ detection hatch cover
IMO Approved
ja
Model Number
2498005 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 and DNV approved – meets international safety standards for cargo gear
- Built‑in CO₂ sensor provides continuous atmosphere monitoring in the hold
- Modular drainage and ventilation channels simplify routine testing and cleaning
- Aluminium alloy construction offers high strength‑to‑weight ratio
- Designed for easy retro‑fit on existing bulk or general‑cargo vessels
Weaknesses
- Coating can delaminate (Tankdecke‑Beschichtung Abblätterung) if not inspected regularly
- Drainage system prone to blockage; requires testing before each loading
- CO₂ sensor drift necessitates quarterly calibration
- Ventilation grilles may corrode or become blocked in harsh marine environments
- Higher upfront cost compared with basic non‑instrumented hatch covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipDry Bulk VesselContainer Ship (dry‑cargo holds)
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need a certified hatch cover with built‑in CO₂ safety monitoring and are able to commit to regular drainage checks and sensor calibration. Avoid if maintenance resources are limited or if a lower‑cost, non‑instrumented cover will suffice.
Use Cases: Commonly installed on new builds or retrofits of bulk carriers and general cargo vessels where dry‑cargo hold safety, gas detection, and compliance with IMO/DNV standards are mandatory. Frequently used in trades carrying grain, coal, ore, or other bulk commodities that require continuous atmosphere monitoring during loading/unloading.
BPK2-6,0012
Per cargo hold design
· Cargo Hold Equipment
· Coated steel hatch cover with CO2 monitoring
IMO Approved
ja
Model Number
5482708 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO-approved and DNV‑certified, meeting class requirements
- Integrated CO2 sensor provides early warning of hazardous atmospheres
- Robust protective coating reduces corrosion when properly maintained
- Designed drainage system allows rapid water removal from the hold
- Standard dimensions compatible with most bulk carrier hatch openings
Weaknesses
- Coating may delaminate if inspection at docking is neglected
- Drainage channels can become blocked, requiring regular testing
- CO2 sensor exhibits drift and needs quarterly calibration
- Ventilation grilles are prone to corrosion or blockage over time
- Higher maintenance workload compared with simple plain‑steel covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipContainer Ship (dry cargo)Ro‑Ro Vessel
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with built‑in CO2 monitoring for dry bulk or general cargo vessels and can commit to regular coating inspection, drainage testing, and sensor calibration. Avoid if your maintenance regime cannot support quarterly sensor checks or if a low‑maintenance plain steel cover is preferred.
Use Cases: Deployed on dry bulk carriers transporting coal, grain, ore, or other non‑liquid cargoes where gas monitoring in the hold is required by class rules; also used on general cargo ships that demand rapid drainage and corrosion‑resistant hatch solutions under DNV classification.
BPK2-6016
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ monitoring hatch cover
IMO Approved
ja
Model Number
3294006 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 approval ensures compliance with international safety standards
- Built‑in CO₂ sensor provides early gas detection in the hold
- Dedicated drainage system helps prevent water accumulation after heavy seas
- Protective coating (Lux) reduces corrosion when maintained properly
Weaknesses
- Coating has a documented tendency to delaminate if not inspected regularly
- Drainage channels can become clogged, requiring pre‑loading checks
- CO₂ sensor drift necessitates quarterly calibration
- Ventilation grilles are prone to corrosion and blockage in salty environments
Typical Vessels:
Bulk CarrierGeneral Cargo ShipContainer Vessel (dry cargo holds)Ro‑Ro / Ferry with cargo decks
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with integrated CO₂ monitoring and a reliable drainage system for dry‑cargo vessels. Avoid if your operation cannot accommodate the regular maintenance (coating inspection, drainage testing, sensor calibration) or if corrosion resistance is critical in highly aggressive environments.
Use Cases: Commonly installed on bulk carriers and general cargo ships to protect dry cargo holds from water ingress while providing gas detection and ventilation control. Also used on vessels that transport hazardous goods requiring continuous CO₂ monitoring inside the hold.
BPK2-5,2011,5
Per cargo hold design
· Cargo Hold Equipment
· Steel hatch cover with integrated CO₂ sensor
IMO Approved
ja
Model Number
4266502 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 and DNV approval – recognised safety compliance
- Robust steel construction suitable for heavy‑duty cargoes
- Integrated CO₂ detection enhances gas‑hazard monitoring
- Standardised drainage and ventilation channels simplify loading operations
- Widely used on bulk and tanker vessels, proven in service
Weaknesses
- Coating can delaminate if not inspected regularly (requires dock‑side checks)
- Drainage system prone to blockage – needs testing before each load
- CO₂ sensor drift demands quarterly calibration
- Ventilation grilles may corrode or become blocked in harsh marine environments
- Higher maintenance workload compared with composite or low‑maintenance covers
Typical Vessels:
Bulk CarrierOil TankerChemical TankerGeneral Cargo Vessel
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need a heavy‑duty, IMO‑approved hatch cover with built‑in CO₂ monitoring for hazardous cargoes and can commit to regular coating inspection, drainage testing and sensor calibration. Avoid if low maintenance or lower upfront cost is the priority, or if operating in environments where corrosion of steel components cannot be managed effectively.
Use Cases: Deployed on vessels transporting bulk dry goods, oil, chemicals or other cargoes that require gas detection and strict safety compliance; commonly found on ships sailing under DNV‑class societies and routes with stringent port state control inspections.
ZR 4,15
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ monitoring hatch cover
IMO Approved
ja
Model Number
8699610 HH
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO approved and DNV certified – meets international safety standards
- Built‑in CO₂ sensor provides continuous gas monitoring inside the hold
- Integrated drainage channels simplify de‑watering after ballast or cleaning operations
- Modular ventilation grille allows adjustable airflow while protecting against corrosion
- Aluminium alloy construction offers good strength‑to‑weight ratio
Weaknesses
- Protective coating has a documented tendency to peel when the cover is repeatedly docked
- Drainage system can become blocked if not flushed before each loading cycle
- CO₂ sensor may drift over time; requires quarterly calibration
- Ventilation grilles are prone to corrosion or mechanical blockage in harsh marine environments
Typical Vessels:
Bulk CarrierGeneral Cargo ShipChemical Tanker (dry cargo tanks)Ro‑Ro/Lo‑Lo vessels with enclosed holds
Certifications:
IMO approvalDNV
Decision Guide: Choose if you need a hatch cover that combines sealing, CO₂ gas detection and built‑in drainage in one unit – especially on vessels carrying bulk or dry chemical cargoes where gas monitoring is mandatory. Avoid if your operation cannot guarantee regular coating inspections, drainage flushing or quarterly sensor calibration, as the known failure modes may increase maintenance burden.
Use Cases: Commonly installed on bulk carriers transporting grain, coal or ore, and on chemical tankers that require continuous CO₂ monitoring to prevent explosive atmospheres. The integrated ventilation is also used on general cargo ships where hold aeration must be controlled while maintaining watertight integrity.
KD 2,103,5/0,9907,5
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ detection hatch cover
IMO Approved
ja
Model Number
1589100 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 approval ensures compliance with international safety standards
- Built‑in CO₂ sensor provides early gas detection in the hold
- Ventilation grilles and drainage channels are incorporated into the cover design
- Robust steel construction with a protective coating for corrosion resistance
- Modular dimensions (2.103 m × 0.990 m) allow fit on a wide range of dry‑cargo holds
Weaknesses
- Protective coating has a known tendency to delaminate if not inspected regularly
- Drainage system can become blocked, requiring pre‑loading testing
- CO₂ sensor may drift and needs quarterly calibration
- Ventilation grilles are prone to corrosion or blockage in high‑humidity environments
- Maintenance intensity is higher than for simple non‑instrumented hatch covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipGrain/Ore CarrierChemical Tanker with cargo holds
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with integrated CO₂ monitoring and built‑in ventilation/drainage for bulk or general cargo vessels, and you can commit to regular coating inspections and sensor calibrations. Avoid if maintenance resources are limited, the operating environment is highly corrosive, or a simpler non‑instrumented cover would suffice.
Use Cases: Commonly installed on dry‑cargo holds of bulk carriers transporting grain, coal, ore, or mixed cargo where gas detection and ventilation are required for safety and cargo integrity. Also used on chemical tankers with cargo holds that demand continuous CO₂ monitoring.
KD 1,704/1,207,5
Per cargo hold design
· Cargo Hold Equipment
· hydraulic steel hatch cover
IMO Approved
ja
Model Number
5484608 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO‑approved and DNV‑certified for global compliance
- Integrated CO₂ sensor provides continuous gas monitoring
- Built‑in drainage system speeds water removal after heavy seas
- Ventilation grills designed to prevent ingress of fumes while maintaining ventilation
- Robust steel construction with a protective coating for high durability
Weaknesses
- Protective coating can delaminate (requires inspection at each docking)
- Drainage channels may become blocked if not flushed before loading
- CO₂ sensor is prone to drift and needs quarterly calibration
- Ventilation grills are susceptible to corrosion or mechanical blockage
- Relatively heavy compared with composite hatch‑cover alternatives
Typical Vessels:
Bulk CarrierOil TankerChemical TankerGeneral Cargo Ship
Certifications:
IMO Type ApprovalDNV Classification
Decision Guide: Choose if you need a proven, IMO‑approved hatch cover with integrated CO₂ monitoring and robust drainage for bulk or tanker vessels. Avoid if weight savings are critical, budget constraints limit regular coating inspections, or you prefer low‑maintenance composite solutions.
Use Cases: Standard on dry‑bulk carriers for grain, coal or ore holds; employed on tankers to seal cargo tanks while providing gas detection and ventilation; used on general cargo ships where a durable, class‑approved hatch is required for safe cargo operations.
ZHP 4.15
Per cargo hold design
· Cargo Hold Equipment
· Hydraulic hatch cover with integrated CO₂ sensor
IMO Approved
ja
Model Number
8689810 HH
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO‑approved and DNV‑certified, meeting international safety standards
- Built‑in CO₂ gas detection for early hazardous atmosphere warning
- Dedicated drainage channels to prevent water accumulation in the hold
- Ventilation grille design allows controlled airflow while protecting against ingress
- Coating system designed for corrosion resistance when properly inspected
Weaknesses
- Coating has a documented tendency to delaminate if not inspected at each docking
- Drainage system can become blocked, requiring functional testing before every loading
- CO₂ sensor exhibits drift and must be calibrated quarterly
- Ventilation grilles are prone to corrosion or blockage in harsh marine environments
- Maintenance intensity is higher than for simple mechanical covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipMulti‑purpose VesselSmall Tanker with deck cargo holds
Certifications:
IMO D-2 (approved)DNV GL – Hatch Cover Approval
Decision Guide: Choose if you need an IMO‑ and DNV‑approved hatch cover with built‑in CO₂ monitoring and are able to perform regular coating, drainage and sensor checks. Avoid if your maintenance regime cannot guarantee quarterly sensor calibration or routine inspection of the protective coating, as failure modes are well documented.
Use Cases: Deployed on bulk carriers and general cargo vessels where safe ventilation, gas detection and rapid water removal from cargo holds are critical – e.g., loading of dry bulk commodities, timber, or mixed cargoes that may generate hazardous atmospheres.
BPK2-5012,2
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ sensor hatch cover
IMO Approved
ja
Model Number
4012301 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO approved and listed by DNV – meets international safety standards
- Built‑in CO₂ detection enhances gas‑hazard awareness in the hold
- Dedicated drainage system reduces water accumulation risk
- Ventilation grilles provide passive airflow for cargo ventilation
- Modular design allows relatively quick replacement of damaged sections
Weaknesses
- Protective coating has a known tendency to delaminate if not inspected regularly
- Drainage channels can become blocked, requiring pre‑load testing
- CO₂ sensor drift necessitates quarterly calibration, increasing maintenance workload
- Ventilation grilles are prone to corrosion and blockage in salty environments
- Higher upfront cost compared with basic non‑instrumented hatch covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipOre CarrierGrain Carrier
Certifications:
IMO Type ApprovalDNV Classification
Decision Guide: Choose if you need a hatch cover that complies with IMO/DNV standards, offers built‑in CO₂ gas detection and has robust drainage/ventilation for dry‑bulk operations. Avoid if your maintenance regime cannot guarantee regular coating inspections, drainage cleaning and quarterly sensor calibration, or if operating in extremely corrosive conditions without additional protective measures.
Use Cases: Deployed on the cargo holds of bulk carriers and general cargo vessels to protect cargo from weather, provide safe ventilation, and continuously monitor CO₂ levels for fire/explosion prevention. Commonly used on ships transporting grain, ore, coal or mixed dry bulk where gas build‑up and water ingress are operational concerns.
BPK2-5012
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ monitoring hatch cover
IMO Approved
ja
Model Number
4775403 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 approval ensures compliance with international safety standards
- Robust steel construction with protective coating reduces corrosion under normal service conditions
- Built‑in drainage system allows rapid water removal after loading operations
- Provision for a CO₂ sensor supports early detection of hazardous gas buildup in the hold
Weaknesses
- Coating has been reported to peel (Tankdecke‑Beschichtung Abblätterung) if not inspected regularly
- Drainage channels can become blocked, requiring pre‑load testing
- CO₂ sensor may drift over time and needs quarterly calibration
- Ventilation grilles are prone to corrosion or blockage in aggressive marine atmospheres
Typical Vessels:
Bulk CarrierGeneral Cargo VesselMulti‑purpose Vessel
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with integrated CO₂ detection for dry cargo holds and can commit to regular coating inspections, drainage testing and sensor calibration. Avoid if the vessel operates in extremely corrosive environments where coating degradation is a high risk or if maintenance intervals cannot accommodate quarterly CO₂ calibrations.
Use Cases: Deployed on dry bulk carriers and general cargo ships to protect cargo from weather, control ingress of water via the drainage system, and monitor for hazardous gases during loading, unloading and ballast operations.
BPK2-4009
Per cargo hold design
· Cargo Hold Equipment
· Coated steel hatch cover with integrated CO₂ sensor
IMO Approved
ja
Model Number
2046904 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO approved and listed in DNV’s approval database – ensures regulatory compliance
- Integrated CO₂ monitoring provides early gas‑hazard warning inside the hold
- Dedicated drainage channel helps prevent water accumulation after heavy weather or loading
- Ventilation grills allow passive airflow, reducing internal temperature build‑up
- Robust design proven on a range of cargo vessels
Weaknesses
- Protective coating has been reported to peel under harsh marine exposure
- Drainage system can become clogged if not inspected before each loading cycle
- CO₂ sensor may drift and requires quarterly calibration
- Ventilation grills are prone to corrosion or blockage in high‑salinity environments
- Maintenance intensity higher than simple non‑sensor hatch covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipContainer Vessel (cargo hold applications)Product Tanker (deck‑hold configurations)
Certifications:
IMO approvalDNV classification
Decision Guide: Choose if you need an IMO‑approved hatch cover with built‑in CO₂ detection and drainage for high‑risk cargoes such as coal, grain or ore. Avoid if your operation cannot support the regular coating inspections, drainage cleaning and quarterly sensor calibration required to keep the system reliable.
Use Cases: Deployed on bulk carriers and general cargo ships where safe ventilation and gas monitoring of the cargo hold are mandatory – e.g., loading of dry bulk commodities in ports with limited shore‑based safety infrastructure. Also fitted on vessels that transport hazardous or volatile cargoes requiring continuous CO₂ level surveillance.
BPK2-6,3010/4017
Per cargo hold design
· Cargo Hold Equipment
IMO Approved
ja
Model Number
1590300 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 approval ensures compliance with international safety standards for dry cargo holds
- Integrated CO₂ sensor provides early gas detection for hazardous atmospheres
- Built‑in drainage system facilitates rapid water removal after loading operations
- Ventilation grilles allow controlled airflow while maintaining watertight integrity
- DNV class certification confirms adherence to recognized classification society requirements
Weaknesses
- Protective coating has a documented tendency to delaminate (Tankdecke‑Beschichtung Abblätterung)
- Drainage channels can become obstructed if not inspected before each loading (Entwässerungssystem Verstopfung)
- CO₂ sensor exhibits drift and requires quarterly calibration (CO2‑Messung Sensor‑Drift)
- Ventilation grilles are prone to corrosion and may block over time (Lüftungsgitter Korrosion/Blockierung)
- Higher maintenance workload compared with simpler, non‑instrumented hatch covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipDry Bulk Vessel
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with built‑in CO₂ monitoring and robust drainage for bulk or general cargo vessels, and you can commit to regular coating inspection, drainage cleaning and sensor calibration. Avoid if low‑maintenance equipment is a priority or the operating environment accelerates corrosion beyond routine upkeep.
Use Cases: Deployed on dry cargo holds of bulk carriers and general cargo ships for loading of ore, grain, coal or containers where rapid water removal, gas detection and controlled ventilation are essential during port operations and at sea.
BPK2-7014/3018,5
Per cargo hold design
· Cargo Hold Equipment
· hydraulic hinged hatch cover with integrated CO₂ sensor
IMO Approved
ja
Model Number
2073904 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D-2 approval ensures compliance with international safety standards
- Integrated CO₂ detection provides continuous gas monitoring in the hold
- Dedicated drainage system helps prevent water accumulation during loading/unloading
- Ventilation grille design allows controlled airflow while maintaining structural integrity
- DNV‑listed model (2073904 Lux) simplifies class approval procedures
Weaknesses
- Protective coating has reported delamination issues, requiring regular inspection at dockings
- Drainage channels can become blocked if not flushed before each cargo operation
- CO₂ sensor exhibits drift and must be calibrated quarterly to retain accuracy
- Ventilation grilles are prone to corrosion or blockage in high‑salinity environments
- Maintenance intensity is higher than for simple manual hatch covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipContainer Vessel (dry‑cargo holds)Ro‑Ro/Passenger ships with cargo decks
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with built‑in CO₂ monitoring and are able to perform quarterly sensor calibration and regular coating inspections. Avoid if low‑maintenance solutions are required or the vessel operates in extremely corrosive environments where coating durability is a concern.
Use Cases: Deployed on dry‑cargo holds of bulk carriers and general cargo vessels for safe loading of coal, grain, ore, etc., especially where inert gas atmospheres are mandated. The integrated CO₂ sensor supports compliance with cargo‑hold ventilation regulations, while the drainage system mitigates water ingress during heavy weather or rapid cargo operations.
BPK2-4,7015
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO₂ detection hatch cover
IMO Approved
ja
Model Number
4413707 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 and DNV approval ensures compliance with international safety regulations
- Built‑in CO₂ sensor provides continuous gas monitoring for hazardous atmospheres
- Effective drainage channels designed for rapid water removal when clear
- Robust steel construction with corrosion‑resistant ventilation grilles
Weaknesses
- Protective coating has a known tendency to peel after extended service periods
- Drainage system can become blocked if not inspected and cleaned regularly
- CO₂ sensor may drift, requiring quarterly calibration to maintain accuracy
- Ventilation grilles are prone to corrosion or blockage in harsh marine environments
Typical Vessels:
Bulk CarrierGeneral Cargo ShipContainer Vessel (for cargo holds)Ro‑Ro/Lo‑Lo vessels with enclosed decks
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need a hatch cover that combines IMO/DNV compliance with built‑in CO₂ monitoring and reliable drainage, and you have the maintenance regime to keep coating, drainage and sensors in good condition. Avoid if your operation cannot guarantee regular coating inspections, drainage cleaning or quarterly sensor calibration.
Use Cases: Deployed on bulk carriers and general cargo ships where hazardous gas detection inside holds is required, especially on routes with strict safety audits. Commonly installed during new‑builds or major retrofits to meet DNV class requirements for gas monitoring and water evacuation.
BPK2-4,7014
Per cargo hold design
· Cargo Hold Equipment
· Coated steel hatch cover with integrated CO₂ sensor
IMO Approved
ja
Model Number
1733500 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO approval ensures compliance with international safety regulations
- Durable protective coating reduces corrosion under normal service conditions
- Integrated drainage system allows rapid water removal after heavy seas or rain
- Built‑in CO₂ detection provides early warning of hazardous gas accumulation
- Ventilation grilles help maintain adequate airflow in the hold
Weaknesses
- Coating may delaminate over time, requiring inspection at each docking
- Drainage channels can become blocked if not cleaned before each loading
- CO₂ sensor is prone to drift and needs quarterly calibration
- Ventilation grilles are susceptible to corrosion or blockage in harsh marine environments
- Higher initial cost compared with basic non‑instrumented hatch covers
Typical Vessels:
Bulk CarrierContainer ShipGeneral Cargo VesselDry Cargo Tanker
Certifications:
IMODNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with built‑in safety monitoring and can commit to regular maintenance (coating inspection, drainage testing, CO₂ calibration). Avoid if your operation cannot guarantee the required quarterly sensor checks or if budget constraints favor a simpler, non‑instrumented cover.
Use Cases: Commonly installed on dry cargo holds of bulk carriers transporting grain, ore or coal, as well as on container ships where hold ventilation and gas detection are critical for crew safety during loading/unloading cycles.
KD 2,104/1,307,5
Per cargo hold design
· Cargo Hold Equipment
· Integrated CO2 monitoring hatch cover
IMO Approved
ja
Model Number
1440499 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D-2 approval ensures compliance with international safety regulations
- Built‑in drainage system allows rapid water removal from the hold
- Integrated CO2 sensor provides early detection of hazardous atmospheres
- Ventilation grille design facilitates passive airflow when not corroded
- Robust construction typical of Neuenfelder hatch covers
Weaknesses
- Protective coating may delaminate if not inspected during docking
- Drainage channels are prone to blockage and require testing before each loading
- CO2 sensor can drift; quarterly calibration is mandatory
- Ventilation grilles can corrode or become blocked in aggressive marine environments
- Higher maintenance workload compared with basic non‑instrumented hatch covers
Typical Vessels:
Bulk CarrierOil/TankerChemical TankerGeneral Cargo Ship
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need a hatch cover that combines gas detection, drainage and ventilation in one unit and you can commit to regular coating inspections, drainage checks and quarterly CO2 sensor calibration. Avoid if your maintenance regime cannot guarantee the required inspection frequency or if a simpler, non‑instrumented hatch cover is sufficient for the cargo type.
Use Cases: Deployed on dry‑cargo holds of bulk carriers and on tankers where gas monitoring inside the hold/tank is mandatory; especially useful in operations with hazardous or volatile cargoes that require continuous CO2 surveillance and rapid water evacuation after heavy weather exposure.
BPK2-4,2010,3
Per cargo hold design
· Cargo Hold Equipment
· Pneumatic/hydraulic operated steel hatch cover with built‑in drainage and gas detection
IMO Approved
ja
Model Number
5482908 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- High structural strength meeting IMO D‑2 requirements
- Integrated drainage system reduces water accumulation in the hold
- Built‑in CO₂ sensor enables early detection of hazardous atmospheres
- Ventilation grille design provides passive airflow while maintaining watertight integrity
- Standardised dimensions simplify replacement and retrofit on existing vessels
Weaknesses
- Coating can delaminate if not inspected regularly, leading to corrosion risk
- Drainage channels are prone to blockage and require routine testing before loading
- CO₂ sensor drift necessitates quarterly calibration, adding maintenance workload
- Ventilation grilles may corrode or become blocked in aggressive marine environments
- Pneumatic/hydraulic actuation system adds complexity compared with simple manual covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipProduct TankerChemical Tanker
Certifications:
IMO D-2DNV
Decision Guide: Choose if: you need a proven, class‑approved hatch cover with integrated drainage and gas detection for bulk or tanker cargoes, and you can commit to regular coating inspection and sensor calibration. Avoid if: low‑maintenance or fully manual covers are required, or the vessel operates in extremely corrosive environments where coating durability is a primary concern.
Use Cases: Commonly installed on dry‑bulk carriers and product/chemical tankers to protect cargo holds from water ingress while providing continuous ventilation and early warning of hazardous gases during loading, transit and discharge operations.
KD 2,103,75/2,009
Per cargo hold design
· Cargo Hold Equipment
· CO₂-sensing steel hatch cover
IMO Approved
ja
Model Number
1905111 HH
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 and DNV approval ensures compliance with international safety regulations
- Integrated CO₂ sensor provides continuous gas monitoring without extra equipment
- Robust steel construction offers high impact resistance for heavy cargo operations
- Built‑in drainage channels simplify water removal after loading/unloading
- Ventilation grid design allows controlled airflow while maintaining seal integrity
Weaknesses
- Protective coating has a documented tendency to delaminate, requiring regular inspection at dry‑dock
- Drainage system can become clogged if not flushed before each cargo operation
- CO₂ sensor exhibits drift and must be calibrated quarterly, adding maintenance workload
- Ventilation grilles are prone to corrosion or blockage in harsh marine environments
- Replacement parts for the specific model may have longer lead times due to limited production runs
Typical Vessels:
Dry Bulk CarrierGeneral Cargo ShipMulti‑Purpose Vessel
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need a hatch cover that combines gas detection with IMO‑approved sealing for dry bulk or multi‑purpose cargo holds and you have the capability to perform quarterly CO₂ sensor calibration and regular coating inspections. Avoid if your maintenance regime cannot accommodate frequent drainage cleaning, coating checks, or sensor recalibration, or if corrosion resistance of ventilation components is a primary concern.
Use Cases: Commonly installed on dry bulk carriers transporting coal, grain, ore, or mixed cargo where inert gas monitoring is required to prevent spontaneous combustion. Also used on multi‑purpose vessels that carry hazardous solid cargoes needing continuous CO₂ level surveillance and reliable water drainage after heavy weather exposure.
KD 2,104/2,008
Per cargo hold design
· Cargo Hold Equipment
· hydraulic double‑acting hatch cover
IMO Approved
ja
Model Number
8699910 HH
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 approval ensures compliance for hazardous cargo holds
- Integrated CO₂ sensor provides continuous gas detection
- Built‑in drainage system speeds water removal after heavy seas
- Ventilation grilles allow controlled airflow while maintaining watertight integrity
- DNV listed, confirming recognized class society endorsement
Weaknesses
- Protective coating has a history of peeling if not inspected during docking
- Drainage channels can become blocked and require regular testing before loading
- CO₂ sensor drift demands quarterly calibration to stay within accuracy limits
- Ventilation grilles are prone to corrosion or mechanical blockage in aggressive marine environments
- Higher maintenance workload compared with simpler manual hatch covers
Typical Vessels:
Bulk CarrierChemical TankerOil TankerGeneral Cargo Ship
Certifications:
IMO D-2DNV
Decision Guide: Choose if the vessel transports hazardous or bulk cargoes that require continuous CO₂ monitoring, reliable drainage and class‑approved hatch protection. Avoid on vessels where low maintenance cost is a priority or where simpler manual covers meet operational needs.
Use Cases: Commonly installed on bulk carriers carrying coal, ore or grain where rapid water egress after heavy weather is critical, and on chemical/oil tankers that need constant gas detection inside the hold to prevent explosive atmospheres. Also used on general cargo ships operating in regions with high corrosion risk, leveraging its robust coating when properly maintained.
KD 2,104/1,306,1
Per cargo hold design
· Cargo Hold Equipment
· Coated steel hatch cover with built‑in CO₂ sensor
IMO Approved
ja
Model Number
1448199 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- IMO D‑2 approval ensures compliance with international safety regulations
- Integrated CO₂ detection provides early warning of hazardous atmospheres
- Built‑in drainage system facilitates rapid water removal after heavy seas
- Robust protective coating (when maintained) offers good corrosion resistance
- DNV listed model gives additional class society endorsement
Weaknesses
- Protective coating can delaminate if not inspected regularly at dockings
- Drainage channels are prone to blockage and require pre‑loading checks
- CO₂ sensor exhibits drift; quarterly calibration is mandatory
- Ventilation grilles may corrode or become obstructed in harsh marine environments
- Higher maintenance workload compared with simpler, non‑instrumented covers
Typical Vessels:
Bulk CarrierGeneral Cargo ShipContainer VesselDry Bulk/Breakbulk Vessel
Certifications:
IMO D-2DNV
Decision Guide: Choose if you need an IMO‑approved hatch cover with built‑in gas detection and reliable drainage for dry cargo holds, and you have the resources for regular coating inspection, drainage cleaning and sensor calibration. Avoid if maintenance windows are limited, the vessel operates in extremely corrosive waters without adequate protective measures, or a simpler low‑maintenance cover is preferred.
Use Cases: Deployed on dry cargo holds of bulk carriers, container ships and general cargo vessels where rapid water evacuation after heavy weather and continuous monitoring of CO₂ levels are required for crew safety and cargo protection. Commonly installed during newbuilds or major retrofits to meet IMO D‑2 hatch cover standards.
KD 2,103,5/1,509
Per cargo hold design
· Cargo Hold Equipment
· Mechanical hatch cover
IMO Approved
ja
Model Number
2100304 Lux
Common Failures & Inspection Points
- Tankdecke-Beschichtung Abblätterung
- Entwässerungssystem Verstopfung
- CO2-Messung Sensor-Drift
- Lüftungsgitter Korrosion/Blockierung
Service: Coating to be checked at docking. Drainage to be tested before each loading. CO2 detection to be calibrated quarterly.
Spare Parts: Neuenfelder Maschinenfabrik GmbH: spare parts from manufacturer. Lead time: 3-8 weeks. Seals and valve inserts to be kept on board.
Strengths
- Highly durable and resistant to corrosion due to its robust design and materials
- Easy maintenance and inspection with regular checks on tank deck coating and drainage system
- Effective CO2 detection and monitoring system for safe cargo handling
Weaknesses
- Potential issues with tank deck coating flaking off over time
- Drainage system may clog if not properly maintained before each loading operation
- CO2 detection sensor drift may require quarterly calibration
Typical Vessels:
Bulk CarrierGeneral Cargo Ship
Certifications:
IMO D-2DNV GL Type Approval
Decision Guide: Choose if: You need a reliable and durable hatch cover for bulk cargo operations. Avoid if: You prioritize low maintenance costs over regular inspection and calibration requirements.
Use Cases: Typically deployed on bulk carriers and general cargo ships for efficient loading/unloading of dry bulk commodities such as grains, coal, or minerals.
MacGregor
6
MacGregor Folding Hatch Cover
various sizes
· Cargo Hold Equipment
· hydraulic folding hatch cover
Type
folding
Operation
hydraulic
Common Failures & Inspection Points
- Hydraulic cylinder seal leak
- Rubber packing compression set
- Hinge pin wear
- Drainage channel blockage
Service: Hose test every 12 months. Rubber packing replacement every 5-8 years. Drain channels must be clear.
Spare Parts: MacGregor: spare parts per manufacturer. Lead time: 3–8 weeks. Keep seals and valve inserts on board.
Strengths
- Compact folded profile reduces wind resistance and frees deck space
- Fast hydraulic actuation enables quick turnaround in port
- Robust sealing with rubber packing provides good watertight integrity
- Modular design allows easy replacement of individual sections or hinges
- Widely class‑approved, fitting standard cargo hold dimensions
Weaknesses
- Hydraulic system adds complexity and requires regular maintenance (leak checks, seal replacement)
- Higher initial cost compared with simple manual or sliding covers
- Potential for hinge pin wear and drainage channel blockage if not inspected regularly
- Limited to vessels that can accommodate the required hydraulic power supply and control space
- Weight of the folded assembly may impose higher deck load requirements
Typical Vessels:
Bulk CarrierOil TankerChemical TankerContainer Ship (large hatch openings)General Cargo Vessel
Certifications:
ABSDNV
Decision Guide: Choose if you need rapid hatch operation, limited deck space, and a proven class‑approved solution for large cargo holds. Avoid if budget is tight, maintenance resources are scarce, or the vessel prefers simpler manual covers with lower hydraulic complexity.
Use Cases: Commonly installed on bulk carriers and tankers where fast loading/unloading of dry bulk or liquid cargo is critical, especially in high‑wind ports or vessels with limited deck area for traditional swing or sliding covers.
MacGregor Side-Rolling Hatch Cover
various sizes
· Cargo Hold Equipment
· hydraulic side‑rolling hatch cover
Type
side_rolling
Operation
hydraulic
Common Failures & Inspection Points
- Wheel and rail wear
- Cross-joint rubber failure
- Hydraulic motor leak
- Locking device wear
Service: Side-rolling type. Rail inspection annually. Wheel replacement per wear.
Spare Parts: MacGregor: spare parts per manufacturer. Lead time: 3–8 weeks. Keep seals and valve inserts on board.
Strengths
- Fast hydraulic actuation reduces cargo handling time
- Side‑rolling design frees up valuable deck space compared with traditional swing covers
- Robust sealing system suitable for bulk, liquid and dry cargoes
- Modular construction allows relatively easy replacement of worn wheels or rails
- MacGregor’s long‑standing reputation for durability and after‑sales support
Weaknesses
- Higher capital cost than manual or pivoting covers
- Requires a dedicated hydraulic power unit and regular fluid maintenance
- Wheel and rail wear can lead to increased downtime if not inspected frequently
- Cross‑joint rubber seals may deteriorate in harsh chemical or high‑temperature environments
- Locking devices are subject to wear and need periodic replacement
Typical Vessels:
Bulk CarrierProduct TankerChemical TankerGeneral Cargo Vessel
Decision Guide: Choose if: rapid hatch turnover is critical, deck space is limited, the vessel already has a hydraulic system, and high‑integrity sealing is required for bulk or liquid cargoes. Avoid if: budget constraints dominate, maintenance resources are scarce, or the operating environment is extremely abrasive leading to accelerated wheel/rail wear.
Use Cases: Commonly installed on new‑build dry‑bulk carriers for grain, coal or ore; product and chemical tankers where quick access to cargo tanks is needed; and general cargo ships that benefit from space‑saving hatch arrangements during port calls.
MacGregor Piggyback Hatch Cover
various sizes
· Cargo Hold Equipment
· hydraulic piggyback hatch cover
Type
piggyback
Operation
hydraulic
Common Failures & Inspection Points
- Hydraulic cylinder seal failure
- Stacking guide rail wear
- Packing compression set
Service: Panels stack on each other. Rail and roller inspection annually.
Spare Parts: MacGregor: spare parts per manufacturer. Lead time: 3–8 weeks. Keep seals and valve inserts on board.
Strengths
- Space‑saving stacked design frees deck area compared with traditional single‑panel covers
- Fast hydraulic actuation reduces opening/closing time and crew labour
- Integrated sealing system offers good weather tightness for dry bulk or liquid cargoes
- Compatible with MacGregor’s standard rail and roller hardware, simplifying installation on existing vessels
- Modular panels allow easy replacement of damaged sections
Weaknesses
- Hydraulic system requires regular maintenance; seal failures are a known issue
- Guide‑rail and roller wear demand annual inspection and possible refurbishment
- Higher initial capital cost than simple manual or pneumatic covers
- Packing material can suffer compression set over time, affecting seal performance
- Limited to hatch sizes that fit the piggyback geometry; not suitable for very small or irregular openings
Typical Vessels:
Bulk CarrierOil TankerChemical TankerLNG/LPG carrier (dry cargo sections)Heavy‑lift/Project vessels with large open holds
Decision Guide: Choose if you need rapid hatch operation, want to maximise deck space, and have the capability to maintain hydraulic gear. Avoid if your crew lacks hydraulic maintenance expertise, budget constraints preclude higher upfront cost, or the hatch dimensions fall outside the piggyback range.
Use Cases: Widely installed on new‑build and retrofitted bulk carriers and tankers where large cargo holds require quick access for loading/unloading, especially in ports with tight turnaround windows. Also used on project vessels that benefit from stacked panels to keep deck clear for other equipment.
Folding Hatch Cover
Cargo hold openings 10-30 m
· Cargo Hold Access
Type
Folding Hatch Cover (Hydraulic)
Size Range
- Single Fold
- Double Fold
- Triple Fold
Power range (kW)
- 15
- 75
Drive Type
Hydraulic
Construction
High-tensile steel panels, rubber packing, hydraulic cylinders/chains
Common Failures & Inspection Points
- Rubber packing degradation causing water ingress — most critical failure mode
- Hydraulic cylinder seal leak from age/fatigue
- Panel hinge pin wear causing misalignment
- Cleating/locking device wear
- Chain drive elongation on chain-operated models
Service: Rubber packing (compression bar) inspection every 6 months. Ultrasonic hatch cover tightness test annually (IMO MSC/Circ.1325). Hydraulic system check before each cargo operation. Panel alignment check at drydock. Cleating device adjustment quarterly.
Spare Parts: MacGregor/Cargotec global. Rubber packing sets: 2-4 weeks. Hydraulic cylinders: 4-8 weeks. Keep onboard: spare packing sections, hydraulic hoses.
Side-Rolling Hatch Cover
Cargo hold openings 10-25 m
· Cargo Hold Access
Type
Side-Rolling Hatch Cover (Hydraulic/Electric)
Size Range
- Single Panel Roll
- Multi Panel Roll
Power range (kW)
- 15
- 50
Drive Type
Hydraulic / Electric
Construction
Steel panels on rail wheels, rubber packing, side stacking
Common Failures & Inspection Points
- Rail wheel bearing failure from corrosion/debris
- Rubber packing degradation
- Drive chain/rack wear
- Panel derailment from misaligned rails
Service: Rail wheel and track cleaning monthly. Packing inspection every 6 months. Rail alignment check at drydock. Chain/rack lubrication monthly.
Spare Parts: MacGregor. Rail wheels: 3-6 weeks. Rubber packing: 2-4 weeks.
Pontoon Hatch Cover
Cargo hold openings 5-20 m
· Cargo Hold Access
Type
Pontoon Hatch Cover (Crane-Lifted)
Size Range
- Small Pontoon
- Medium Pontoon
- Large Pontoon
Drive Type
None (lifted by ship crane or shore crane)
Construction
Steel/aluminum pontoon panels, rubber packing, cleating devices
Common Failures & Inspection Points
- Rubber packing degradation
- Pontoon panel deformation from cargo impact/stacking
- Cleating device corrosion/seizure
- Lifting lug wear/cracking
Service: Rubber packing inspection every 6 months. Pontoon panel straightness check at drydock. Cleating device maintenance quarterly. Lifting lug NDT at 5-year survey.
Spare Parts: MacGregor. Rubber packing: 2-4 weeks. Standard steel pontoon repairs possible at any shipyard.
Coaming (China)
2
Jiangsu Coaming Folding Hatch
various sizes
· Cargo Hold Equipment
· hydraulic folding hatch
Type
folding
Operation
hydraulic
Origin
China
Common Failures & Inspection Points
- Rubber packing failure
- Hydraulic pipe corrosion
- Hinge pin wear
Service: Chinese manufacturer. Budget option. Same survey requirements.
Spare Parts: Coaming (China): Spare parts per manufacturer. Lead time: 3-8 weeks. Gaskets and valve inserts to be kept on board.
Strengths
- Low initial purchase cost – budget‑friendly option for new builds or retrofits.
- Standard hydraulic actuation provides quick opening/closing with minimal manual effort.
- Folding design saves deck space compared with full‑width sliding or swing covers.
- Compatible with typical cargo‑hold survey requirements used worldwide.
Weaknesses
- Rubber packing material has a documented history of premature failure, requiring frequent inspection and replacement.
- Hydraulic pipe corrosion observed in salt‑water service if proper protective coating is not maintained.
- Hinge pins can wear out after high cycle counts, leading to reduced sealing integrity.
- Quality control may be less rigorous than premium OEMs, increasing the risk of component variability.
Typical Vessels:
Bulk CarrierGeneral Cargo ShipCoastal Trader
Decision Guide: Choose if: you need a cost‑effective hatch cover for a new or existing dry cargo hold and can implement a strict maintenance regime for seals, hydraulics and hinges. Avoid if: the vessel operates in highly corrosive environments without robust protective measures, or if certification to specific class societies (e.g., USCG Type Approval) is mandatory.
Use Cases: Commonly installed on medium‑size dry bulk carriers and general cargo vessels where deck space is at a premium and budget constraints limit the use of higher‑priced hatch systems. Often selected for retrofits on older ships seeking to modernise opening mechanisms while keeping capital expenditure low.
Hydraulic Folding Hatch Cover
Cargo hold openings 10-25 m
· Cargo Hold Access
Type
Folding Hatch Cover
Size Range
- Single Fold
- Double Fold
Power range (kW)
- 15
- 50
Drive Type
Hydraulic
Construction
Steel panels, rubber packing, hydraulic cylinders
Common Failures & Inspection Points
- Rubber packing quality inconsistency
- Hydraulic cylinder seal reliability varies
- Panel alignment issues from manufacturing tolerances
- Cleating device wear
Service: Same as MacGregor but shorter inspection intervals recommended. Ultrasonic tightness test critical.
Spare Parts: Chinese OEMs (various, Jiangsu/Zhejiang). Very competitive pricing. Lead time: 2-3 weeks China.
Cargotec
1
TTS Folding HC
Type
Folding (top-side hydraulic)
Weathertight Sealing
EPDM compression bar
Container Stacking
Up to 4-high
Original OEM Period
2010 - 2018 (pre-MacGregor merger)
Type Approval
DNV, LR, BV, ABS
[08.08.2026] Datenblattlink entfernt (nicht erreichbar): https://www.cargotec.com/marine/tts/products/folding-hatch-covers
Mitsubishi
1
Marine Hatch Cover
Cargo hold openings 10-25 m
· Cargo Hold Access
Type
Folding / Side-Rolling Hatch Cover
Size Range
- MHI Folding
- MHI Side-Roll
Power range (kW)
- 15
- 50
Drive Type
Hydraulic
Construction
Steel panels, rubber packing
Common Failures & Inspection Points
- Standard hatch cover failures — packing, hydraulics, alignment
Service: Standard hatch cover maintenance per MHI manual.
Spare Parts: MHI Japan. Lead time: 3-6 weeks Asia.
TTS / Cargotec (Norway/Finland)
1
RoRo Hatch Cover / Car Deck Panel
Vehicle deck access
· Vehicle Deck / Cargo Deck Access
Type
Liftable/Tilting Car Deck Panel
Size Range
- Liftable Panel
- Tilting Panel
- Flush Stowing Panel
Power range (kW)
- 5
- 30
Drive Type
Hydraulic / Electric
Construction
Steel panel, hydraulic cylinders, flush design
Common Failures & Inspection Points
- Hydraulic cylinder seal leak
- Panel hinge pin wear
- Flush stowing mechanism jam
- Rubber seal deterioration
Service: Panel operation test before each cargo operation. Hydraulic system check monthly. Hinge pin lubrication monthly.
Spare Parts: TTS/Cargotec (Tønsberg, Norway). Lead time: 3-6 weeks.
TTS Marine
1
TTS Pontoon Hatch Cover
various sizes
· Cargo Hold Equipment
· crane‑lift pontoon hatch
Type
pontoon
Common Failures & Inspection Points
- Rubber packing deterioration
- Cleat/cross-joint mechanism wear
- Crane lift attachment damage
Service: Pontoon type — lifted by ship's cranes. Packing replacement as needed.
Spare Parts: TTS Marine: spare parts per manufacturer. Lead time: 3–8 weeks. Seals and valve inserts to be kept on board.
Strengths
- Robust steel construction suitable for large hatch openings
- Simple integration with existing deck cranes – no dedicated lifting gear required
- Replaceable rubber packing allows straightforward maintenance of the watertight seal
- Modular design enables quick removal for hold inspection or cargo handling
- Relatively low initial cost compared with hydraulic rolling systems
Weaknesses
- Requires a functional deck crane; not suitable for vessels without adequate lifting capacity
- Heavier than hydraulic or rolling covers, increasing manual handling effort
- Wear on cleat/cross‑joint mechanisms and rubber packing can lead to scheduled replacements
- Slower opening/closing cycle compared with automated hydraulic systems
- Limited suitability for high‑frequency hatch operations where speed is critical
Typical Vessels:
Bulk CarrierGeneral Cargo ShipTanker (oil, chemical)Ore Carrier
Decision Guide: Choose if: the vessel has a deck crane with sufficient capacity, you need a durable and simple cover for large hatch openings, and maintenance resources are available for periodic packing replacement. Avoid if: rapid hatch turnover is required, the ship lacks an adequate crane, or you prefer fully automated hydraulic/rolling solutions.
Use Cases: Commonly deployed on bulk carriers and tankers where a strong, watertight seal is essential and the deck crane can be used to lift the cover for cargo loading/unloading, hold inspections, or emergency access in heavy‑weather conditions.