TL2003
TL2003 by Guiyang Talent Friction Material Co., Ltd.. DNV TA certificate TAS000032M.
Inspector Detail
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Common issues
- Valve disc/seat sticking or fouling from tank atmosphere contamination or cargo vapor residue
- Corrosion of the valve body and internal components from cargo vapors or weather exposure
- Spring fatigue or setting drift affecting relief pressure and vacuum-breaking accuracy
- Flame screen/arrestor blockage or damage, where fitted
- Ice formation blocking the valve in cold climates or with certain cargo vapors
- Gasket/seal degradation causing leakage below the set pressure
Inspection checklist
- Visual inspection for corrosion, damage, and free movement of the valve disc
- Function test of pressure and vacuum relief action, where testable in place
- Check flame screen/arrestor (if fitted) for blockage, damage, or corrosion
- Inspect for ice formation or fouling, particularly before cold-weather or cargo operations
- Verify set pressure/vacuum against the nameplate and the tank's operating requirements
- Check gaskets and seating surfaces for wear or damage
- Confirm the valve is free to lift and reseat without sticking
Service intervals
| Visual inspection | at each tank inspection opportunity, at least annually |
| Function/pop test (bench or in-situ per manufacturer) | annually, or per class requirement for the vessel's cargo system |
| Overhaul (disassembly, seat lapping, spring check) | at dry-dock or per class special survey cycle, typically every 2.5-5 years |
Typical wear limits
| Set pressure/vacuum drift | flag for overhaul if the measured lift/relief point deviates more than roughly 5-10% from the nameplate setting - confirm against manufacturer and class acceptance criteria |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Critical spares
- Valve seat and disc set
- Spring matching the original set pressure/vacuum rating
- Gaskets and seals
- Flame screen element, if fitted
Safety
- A blocked or malfunctioning PV valve can lead to tank overpressure or vacuum damage - never isolate or block a PV valve while the tank is in cargo/ballast operation
- Cargo vapor exposure during inspection/overhaul - follow the vessel's gas-freeing and PPE procedures
- Ice or fouling blockage in cold conditions can mask a valve's actual relief function - check specifically before winter operation
Class survey
Note on scope: only a DNV Type Approval reference is available for this specific model in the source data, with no manufacturer datasheet - the content above reflects general practice for pressure/vacuum valves of this class rather than model-specific figures. PV valves are checked as part of cargo tank venting system surveys; class expects evidence of periodic function testing and set-pressure verification.
Components & Design
Component data being added…
Technical Data
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Maritime Network →DNV type approval
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- Certificate
- TAS000032M