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Private Boat

Customer: Private Boat 

Application: Reverse osmosis pump

Plunger Pump

Location: Germany

Equipment supplied

1 x CAT Plunger pump

  • Supply includes 3CP1221 pump, motor, flexible coupling and bellhousing
  • Motor is 1.1 kW 6 Pole 400/3/50 IP55 TEFC.
  • For use in an indoor safe area.
  • Pump Duty: 8.8 litres/minute at 35 Bar.
  • Liquid: sea water
  • Temperature: ambient.
  • Inlet: c2 metres head is recommended.
  • Drive: 0.9 kW absorbed power at a pump speed of approximately 960 rpm.


We were contacted by an owner of a private boat who was installing a reverse osmosis system aboard their vessel. They required a high pressure desalination pump for the system to convert sea water into fresh water. The pump was needed to transfer sea water at a duty of 8.8 L/min at 35 Bar.


Castle Pumps has a wealth of experience with reverse osmosis systems; we have access to a high quality brand of plunger pumps that are widely used for reverse osmosis systems. We selected a stainless steel desalination pump fitted to a 1.1Kw 6 pole motor to achieve the required duty of 8.8 L/min at 35 Bar.

You can download this case study by clicking on the image below...

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