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Stainless Steel Piston Pump HPA20-40

The HPA20-40 stainless steel piston pumps  are completely oil-free clean systems, with water as the only cooling and lubricant, eliminating potential cross-contamination between lubricating oil and water. They are mainly made of 304 stainless steel and 316SS.
  • HPA20-40

  • 27.6 LPM ~ 55.2 LPM

  • 700 rpm

  • 3600 rpm

  • 160 Bar

  • As your requirements

  • 304 /316 / Duplex / Super Duplex Stainless Steel


Water supply conditions

HPA20-40 water high pressure pumps are designed for two ports and are mainly used in pump group systems. The pump is not designed to suck water, and the inlet pressure must always be positive. If this cannot be guaranteed, it will cause permanent failure of the pump.

The simplest method is to remove the inlet pipe of the pump and measure the flow. When the liquid level of the water tank is at the lowest value, the water supply flow must be 20% larger than the delivery flow of the pump to ensure that the inlet always maintains positive pressure when the pump is running.

Do not install a filter between the pump and the water tank with direct water supply, unless a pressure switch is installed on the inlet pipe to ensure that the inlet of the pump is not affected by negative pressure;

mwater high pressure pump inlet pressure

Electric pump set

Use a standard bell housing and coupling for connecting the pump to the B5 motor flange. The pump must not be operated with axial or radial loads on the output shaft; gear couplings are used whenever possible.


HPA10-20 water high pressure pumps are used between 2°C and 50°C to achieve full performance. For temperatures below freezing, environmentally friendly antifreeze is required; those above 50°C are also possible, but the volumetric efficiency of the pump will be affected and the maximum operating temperature must be specified before ordering.


All water entering the pump must be pre-filtered to a nominal rating of 10um (absolute value of 25um).

For closed loop systems, backflow filtration is possible. High-pressure filtration can also be used, but we think this is a more expensive option.


The standard product works well on drinking water and industrial water (I. e. distilled water, reverse osmosis water, or demineralized water). Depending on the operating environment, changes to the sealing material or structure may be required.

Standard construction can be used on seawater, however, due to the increased corrosion potential of the liquid, the longer-term operation may require higher-quality material construction.


Detailed Information

Name Stainless Steel Piston Pump HPA20-40
Stock Status Inventory, and Usually Ships in 2 Weeks
Weight 14.72KG
Country of Origin China
Email For Price YES
Related Products Please go to HPA DATA SHEET

Installation size parameters

Models covering: 

HPA160 - 20W/S,HPC160 - 20W/S
HPA160 - 32W/S,HPC160 - 32W/S
HPA160 - 40W/S,HPC160 - 40W/S

Flat key size 8*7*32 (DIN6885)
Vent Port Bolt (Bleed) M6*10
T Port (Inlet Port) G 1-1/2" (T Port)
Pressure Port (Outlet Port) G 3/4" (P Port)

Axial Stainless Steel Pump HPA20-40STAINLESS STEEL PISTON PUMP HPA20-40

For the nozzle position, one can choose it on the stainless steel high pressure pump side or at the bottom, due to the different application sites of fresh water or seawater, etc. Let us talk for your convience.