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How to Get Water Pressure from a Jet Pump

A jet pump is a piece of equipment that uses a high pressure gas or vapor to increase pressure in a liquid stream. A jet pump, also called an ejector, injector or thermocompressor, uses the Venturi effect to increase pressure. The Venturi effect incorporates the use of a converging and diverging nozzle that creates a suction point in the throat of the pump. The pressure increase in the liquid is a function of the pressure of the gas or vapor.

Things You'll Need

Jet pump
Water source and connecting pipelines, fittings and block valves
Steam source and connecting pipelines, fittings and block valves
Steam pressure regulator

Instructions

- 1
  Connect the water pipeline to the inlet flange of the jet pump. The water is called the motive fluid. Keep the block valves closed.
- 2
  Connect the steam pipeline to the vapor flange of the jet pump. Keep the block valves closed. Set the regulator for a low pressure such as 50 pounds per square inch (psi).
- 3
  Open the block valve for the water flow and verify that water is flowing through the jet pump at the pressure available in the water pipeline.
- 4
  Open the block valve for the steam flow and note the immediate pressure increase of the water flow out of the exit of the jet pump. This pressure can be increased or decreased by adjusting the steam pressure regulator.

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