HEM Flow series watermakers - Models 3, 5, 6 - Evac Skip to content Main Evac Segments Solutions Products Lifecycle services Evac® Thought leader in sustainable water and waste management Land based solutions Fresh water generation Vacuum collection Wastewater treatment Wet waste treatment Dry waste treatment News May 13, 2024 Evac publishes its Annual Review 2023 Read more Article June 8, 2023 Evac aims at driving maritime wastewater impacts to zero Read more Cathelco Segments Products Lifecycle services Cathelco® Cathelco safeguards your fleet by managing biofouling, ensuring corrosion protection, and generating fresh water Ultrasonic Antifouling Marine growth prevention Corrosion protection Fresh water generation News April 4, 2024 Cathelco unveils groundbreaking ultrasonic antifouling technology: USP DragGone™ Read more Blog May 14, 2024 Choosing the best antifouling option for modern fleets Read more HEM Segments Products Lifecycle services HEM® HEM offers specialized fresh water generation systems designed to meet the unique requirements of superyachts Fresh water generation HEM Flow Series watermakers HEM performance and quality, sized and priced for 20-50 meter yachts for the first time The all-new HEM Flow Series discover the new watermaker About References News Contact us en de fr pt cn fi Evac Brand Portal Login to Evac Brand Portal and get access to exclusive content and services Login Main Evac Segments Solutions Products Lifecycle services Evac® Thought leader in sustainable water and waste management Land based solutions Fresh water generation Vacuum collection Wastewater treatment Wet waste treatment Dry waste treatment News May 13, 2024 Evac publishes its Annual Review 2023 Read more Article June 8, 2023 Evac aims at driving maritime wastewater impacts to zero Read more Cathelco Segments Products Lifecycle services Cathelco® Cathelco safeguards your fleet by managing biofouling, ensuring corrosion protection, and generating fresh water Ultrasonic Antifouling Marine growth prevention Corrosion protection Fresh water generation News April 4, 2024 Cathelco unveils groundbreaking ultrasonic antifouling technology: USP DragGone™ Read more Blog May 14, 2024 Choosing the best antifouling option for modern fleets Read more HEM Segments Products Lifecycle services HEM® HEM offers specialized fresh water generation systems designed to meet the unique requirements of superyachts Fresh water generation HEM Flow Series watermakers HEM performance and quality, sized and priced for 20-50 meter yachts for the first time The all-new HEM Flow Series discover the new watermaker About References News Contact us en Back de fr pt cn fi Solutions › Products › HEM Flow series watermakers – Models 3, 5, 6 Fresh water generation HEM Flow Series watermakers – Models 3, 5, 6 New design Compact and modular RO watermaker for yachts ranging 20-50 meters Quiet, low-vibration operation with advanced control and monitoring Capable of producing up to 6.6 m 3 freshwater per day The HEM Flow Series is a compact reverse osmosis (RO) watermaker range designed for 20-50 meter yacht applications where installation space, price, noise levels and long-term serviceability are key considerations. The series uses proven RO principles combined with a modern control system and a simplified mechanical layout. The watermakers can be fitted as framed or modular units for flexible installation. Available models The HEM Flow series covers typical freshwater demand for yachts in the 20–50m range. Model Freshwater output HEM Flow 3 3.7 m³/day HEM Flow 5 5.1 m³/day HEM Flow 6 6.6 m³/day Available upgrades Pro upgrade The Pro upgrade adds advanced control, vessel integration, and enhanced filtration compared to the Standard version. Smarter automatic process control Pro regulation uses additional inputs (including product flow rate and feed water temperature) alongside salinity and operating pressure. This supports more stable operation and is intended to help prolong membrane lifespan. Maintenance interval alerts Standard has no interval alerts, while Pro adds configurable maintenance prompts (LP/HP pumps and membranes) based on running hours. Remote monitoring and operation (AMCS integration) Standard provides volt-free alarm contacts only. Pro supports full automation integration via Modbus (MODBUS TCP; IP upon request) alongside volt-free warning/alarm contacts, enabling monitoring and operation via the vessel AMCS. Upgraded finish Pro includes a painted, high-gloss finish as part of the upgrade package. Upgraded filtration and product water conditioning Compared to Standard, Pro adds an additional backwashable sand filter on seawater pre-filtration, and post-filtration that includes calcium carbonate granules plus active carbon to support improved palatability and pH balance. Technical data Electrical requirements Electrical load: 3.1 kW Available voltage: 230 VAC ±10% / 1Ph / 50–60 Hz; 400 VAC ±10% / 3Ph / 50–60 Hz MCB size: 25A (230V / 1Ph) or 16A (400V / 3Ph) Grounding: install with sufficient grounding options (typically via grounding studs or pillars). Operating parameters Feed water flow: 16 L/min (23 m³/day) Feed water pressure: 0.1–3 bar Working pressure: typically 55–62 bar (may vary outside this range depending on salinity and seawater temperature). Parameter HEM Flow 3 HEM Flow 5 HEM Flow 6 Capacity (L/min) 2.6 3.6 4.6 Capacity (L/hour) 156 216 276 Capacity (m³/day) 3.7 5.1 6.6 Weight (kg) – framed 82 90 96 Weight (kg) – modular 80 78 94 Safety parameters Low pressure switch set point: 0.1 bar (modifiable via HMI controller) High pressure switch set point: 70 bar (modifiable via HMI controller) Water quality parameters Salt rejection: up to 99.7% (depending on operating conditions and membrane type) Feed water salinity: 32,000–40,000 ppm NaCl, 8–35°C (25°C optimal operating temperature) Product water TDS: <450 ppm Key features and capabilities Easy access to consumables Membranes and filters are easy to replace. Low-vibration high-pressure pump for quieter operation A rotary-style high-pressure pump architecture is selected to reduce vibration and noise while keeping the footprint small and maintenance needs lower than more traditional arrangements. Simplified internal components for easier maintenance Internal components are reduced and consolidated through a machined manifold concept to simplify the system layout and improve service access. Soft start and stable operation through variable-speed control A variable frequency drive enables soft start and supports stable operation by controlling the high-pressure pump. Advanced regulation and monitoring Automatic system process control monitors key operating variables (e.g., pressure, flow, salinity) and can provide maintenance prompts to support consistent operation and membrane care. Vessel integration and remote control readiness Integration outputs support connection to vessel monitoring/alarm systems, with the ability to enable deeper automation integration (including remote start/stop) where required. Failsafe usability with full electrical override If control electronics are compromised, a full electrical override supports continued/manual operation. Dimensions and drawings Which model fits your project? Multiple variations and configuration options make HEM Flow easy to spec and fit for any project. Try the HEM Flow configurator to see which model and variation is the right one for you. Daily freshwater need L/day Enter the average daily freshwater demand. Space requirement Restricted space requirement Standard space requirement Integration to ship’s alarms, monitoring, control system No Yes Fully automatic control No Yes Maintenance reminders No Yes In built rehardening filter No Yes Finish preference Standard finish Painted finish Get recommendation Reset Recommended setup Good fit Contact HEM sales Share your details and we’ll route the configuration to our team. First name * Last name * Email * I agree to receive other communications from Evac Group * Submit Re-configure Service support is a key part of the HEM Flow value proposition The system design emphasizes accessibility and the use of widely available components. This ensures stable operation throughout the vessel’s service life. Global service footprint through HEM and Cathelco Spare parts stocked regionally for short lead times Standardised components that remain available long-term Remote support capability on Pro systems via Modbus Evac® Land based solutions Fresh water generation Vacuum collection Wastewater treatment Wet waste treatment Dry waste treatment Cathelco® Ultrasonic Antifouling Corrosion protection Marine growth prevention HEM® HEM Flow watermakers Solutions Lifecycle services Product catalog Resources References News About us Our purpose Career at Evac Suppliers Contact us Evac offices Invoicing addresses Sustainability Responsible business practices Water saving calculator DragGone Calculator © Evac 2024  •  Legal notice   •  Privac y policy   •  Sal es terms   •  Patent and tradema rk notice   •  Report a misconduct Contact us Search Write here