Description
The HPS 16–21 range comprises water-lubricated axial piston high pressure pumps for seawater reverse osmosis applications. Housing material is Super Duplex Stainless Steel 2507. This pump is not designed to draw water directly; positive inlet pressure is required for proper operation. Failure to maintain positive inlet pressure can result in permanent damage to the pump.
Inlet Pressure Requirements:
- To ensure positive inlet pressure, disconnect the inlet pipe and measure the flow. When the water tank is at its lowest liquid level, the water supply flow must be at least 20% greater than the pump’s delivery flow to maintain positive pressure during operation.
- Do not install a filter between the pump and the water tank in direct water supply systems unless a pressure switch is installed on the inlet pipe to prevent negative pressure.
Electric Pump Set:
The pump should be connected to a B5 motor flange using a standard bell housing and coupling. To avoid damage, the pump must not be subjected to axial or radial loads on the output shaft. Whenever possible, use gear couplings for added reliability.
Operating Temperature Range:
The HPS 16~21 operates efficiently in temperatures ranging from 2°C to 50°C.
- For temperatures below freezing, use environmentally friendly antifreeze.
- For temperatures above 50°C, the pump’s volumetric efficiency may decrease. Specify the maximum operating temperature during the ordering process if operation above 50°C is required.
Filtration:
All water entering the pump must be pre-filtered to a nominal rating of 10µm (absolute value of 25µm).
- For closed-loop systems, backflow filtration is an option.
- High-pressure filtration is also possible but may be a more costly solution.
Fluid Compatibility:
The standard HPS 16~21 pump is suitable for:
- Drinking water
- Industrial water (e.g., distilled water, reverse osmosis water, or demineralized water)
Depending on the operating environment, modifications to sealing materials or structural components may be necessary.
The standard seawater pump housing is Super Duplex Stainless Steel 2507. Confirm the compatibility of seals and other components with the specified fluid and operating conditions.
| Parameter | HPS 16 | HPS 17 | HPS 19 | HPS 21 |
|---|---|---|---|---|
| Code Number | TT010200217 | TT010200218 | TT010200219 | TT010200220 |
| Displacement (cc/rev) | 187.3 | 196.4 | 220.3 | 251.96 |
| Housing Material | 2507 | 2507 | 2507 | 2507 |
| Min. Outlet Pressure (barg) | 10 | 10 | 10 | 10 |
| Max. Outlet Pressure | 70 barg at 1500 rpm; 85 barg at 1200 rpm | 70 barg at 1500 rpm; 85 barg at 1200 rpm | 70 barg at 1500 rpm; 85 barg at 1200 rpm | 70 barg at 1500 rpm; 85 barg at 1200 rpm |
| Continuous Inlet Pressure (barg) | 2–5 | 2–5 | 2–5 | 2–5 |
| Min. Continuous Speed (rpm) | 700 | 700 | 700 | 700 |
| Max. Speed (rpm) | 1500 | 1500 | 1500 | 1500 |
| Flow at 85 barg / 700 rpm (m³/h) | 7.12 | 7.53 | 8.42 | 9.92 |
| Flow at 85 barg / 1000 rpm (m³/h) | 10.6 | 11.18 | 12.58 | 14.58 |
| Flow at 85 barg / 1200 rpm (m³/h) | 12.76 | 13.45 | 15.02 | 17.52 |
| Flow at 70 barg / 1500 rpm (m³/h) | 16.0 | 16.80 | 18.85 | 21.82 |
| Calculation Factor at Maximum Speed | 533 | 536 | 531 | 535 |
| Motor Selection (kW), catalogue reference | 37 | 37 | 45 | 55 |
| Media Temperature (°C) | 2–50 | 2–50 | 2–50 | 2–50 |
| Sound Pressure Level (dB) | 85 | 85 | 85 | 85 |
| Weight (kg) | 75 | 75 | 75 | 75 |
| Integrated Flush Valve | YES | YES | YES | YES |
At maximum speed, inlet pressure must be at least 2 barg. Catalogue motor ratings are reference values; confirm motor loading at the required operating point. Sound pressure level is referenced to EN ISO 3744:2010, LPA at 1 m, under the catalogue maximum-pressure and maximum-speed test conditions.
2026 HPS Catalogue — HPS 16–21 Specifications