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Cat High Pressure Triplex Piston Pumps

Reverse Osmosis Pump

Cat High Pressure Triplex Piston PumpsCat High Pressure Triplex Piston Pumps
Flow Rate Up to 228 litres/min
Max Head (pressure) 103 bar
Max Temperature 115°C
Inlet/Outlet ¼” to 2½” inlet and ¼” to 1¼” outlet


Flow Rate Up to 228 litres/min
Max Head (pressure) 103 bar
Max Temperature 115°C
Inlet/Outlet ¼” to 2½” inlet and ¼” to 1¼” outlet

These CAT pumps are industrial duty, high pressure  triplex piston pumps, designed for operation in difficult, high pressure applications. Often outside the capability of most rotary pumps, the Cat piston pump range is able to perform up to 228lpm and 103bar.

With the synchronised pistons that are incorporated into the pump, the piston pump creates a stable, low pulsation flow as the fluid moves continually in one, smooth forward direction. It is determined by the running speed of the CAT pump and is generally unaltered by such issues of specific gravity, back pressure or viscosity of the fluid. This steady flow enables the piston pump to operate necessarily smoothly for most applications.

By taking in a fixed volume of liquid, the high pressure piston pump ensures that a constant volumetric flow is always delivered. This is attributed to the inlet stroke on the piston moving the set amount of liquid around and out of the pump.

The primary uses of CAT triplex piston pumps include water mist cooling, chemical injection, pressure cleaning, reverse osmosis and food processing. To determine the CAT pump model which is most suited to your requirements you need to take in to account several factors including the liquid to be pumped, duty cycle, operating temperatures, drive, location and whether the area is classified as safe of hazardous.

Models in the CAT pump are available in brass and 316 stainless steel depending upon customer requirements

Key Features

  • Brass and 316 stainless steel model available with a performance range from 11.4lpm to 228lpm and pressures from 69bar to 103 bar
  • Dependable output- discharge pressure, specific gravity and liquid viscosity have no effect upon the flow rate.
  • Speed relative to flow rate – performance can be simple to control and predict as the pump output is directly linear to the operating speed
  • Resilient drive ends - produced to the highest quality with close consistent tolerance, the crankshafts, crossheads and connecting rods are optimised to minimise wear.
  • None abrasive surfaces - the piston pump does not rely on the fluid’s lubricating properties as there is no relative movement between contact surfaces within the pump head.
  • Solid ceramic plungers - to make sure that the seals are aligned correctly when seals are replaced, smooth solid plungers made from alumina ceramics are located concentrically
  • No inner liquid mixing- internal mixing of lubricant and process liquid is eradicated due to the substantial gap between the pump head and the oil bath. Any spillages of the liquid are clear as there is a drainage area which is open beneath the pump.
  • Highly efficient - minimal internal slippage and low friction ensure that the energy efficiency levels are between 85% & 95% and consequently running costs are lower.
  • Continuous duty – these triplex piston pumps are designed to work continuously at the rated duty
  • Model 280 - 3 Frame Piston Pump - Solid Shaft, Brass, 11.4lpm, 69bar
  • Model 290 - 3 Frame Piston Pump - Solid Shaft, Brass, 11.3lpm, 83bar
  • Model 333 - 4 Frame Piston Pump - Solid Shaft, Brass, 15.2lpm, 83bar
  • Model 430 - 4 Frame Piston Pump - Solid Shaft, Brass, 19lpm, 69bar
  • Model 323 - 5 Frame Piston Pump - Solid Shaft, Brass, 19lpm, 103bar
  • Model 623 - 10 Frame Piston Pump - Solid Shaft, Brass, 22.8lpm, 83bar
  • Model 820 - 10 Frame Piston Pump - Solid Shaft, Brass, 38lpm, 69bar
  • Model 390 - 5 Frame Piston Pump - Solid Shaft, Brass, 45.6lpm, 41bar
  • Model 1010 - 10 Frame Piston Pump - Solid Shaft, Brass, 49.4lpm, 48bar
  • Model 2520 - 25 Frame Piston Pump - Solid Shaft, Brass, 95lpm, 55bar
  • Model 6040 - 60 Frame Piston Pump - Solid Shaft, Brass, 152lpm, 103bar
  • Model 6020 - 60 Frame Piston Pump - Solid Shaft, Brass, 228lpm, 69bar
  • Model 281 - 3 Frame Piston Pump - Solid Shaft, Stainless Steel, 11.4lpm, 69bar
  • Model 291 - 3 Frame Piston Pump - Solid Shaft, Stainless Steel, 13.3lpm, 83bar
  • Model 331 - 4 Frame Piston Pump - Solid Shaft, Stainless Steel, 15.2lpm, 82bar
  • Model 431 - 4 Frame Piston Pump - Solid Shaft, Stainless Steel, 19lpm, 69bar
  • Model 621 - 10 Frame Piston Pump - Solid Shaft, Stainless Steel, 22.8lpm, 83bar
  • Model 821 - 10 Frame Piston Pump - Solid Shaft, Stainless Steel, 38lpm, 69bar
  • Model 1011 - 10 Frame Piston Pump - Solid Shaft, Stainless Steel, 49.4lpm, 48bar
  • Model 6041 - 60 Frame Piston Pump - Solid Shaft, Stainless Steel, 152lpm, 103bar
  • Model 6021 - 60 Frame Piston Pump - Solid Shaft, Stainless Steel, 228lpm, 69bar
Subsea Oil/Gas Company

Subsea Oil/Gas Company

Castle Pumps customise and engineer pumping solutions when required, to ensure that they match the customer's bespoke requirements exactly. In this case study, we put together a ready to use skid mounted pump system complete with pump, motor, belt drive, guard and steel base to meet their requirement for a high pressure, low flow solution.


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