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how the Papa pump works hero

In 1996 English engineer Frederick Philip Selwyn patented a ‘fluid pressure amplifier’ which differed in many ways to the contemporary hydraulic ram pump technology by the development of a Venturi Effect waste valve.

This Venturi Valve uses the low pressure generated by high velocity water flow around a curve-shaped elastomeric valve (with low pressure loss) enabling rapid closure and with a relatively small cross sectional area and low weight. The Venturi Valve is configured as a ring section positioned around the supply inlet of the pump with the delivery outlet of the pump being directly in line. This allows the pump structure to be concentric and therefore inherently strong. Upon closure of the valve, it permits efficient water delivery by acting in line with the supply via a second smaller venturi effect delivery non return valve. The elastomeric material and operation of these valves also allows them to self-return without weight or spring assistance.

The unique technology dramatically reduces the weight, manufacturing cost and number of components required - as well as providing an overall improvement in efficiency compared to a traditional hydraulic ram pump.

Meet the Inventor

How it Works

Inside the Papa Hydraulic Ram Pump

how it works section through Papa hydraulic ram pump
How It Works - Operation
how it works step 1 hydraulic ram pump

Water enters the ram pump through the supply port and flows around the main valve to the exhaust port.

As the flow increases around the main valve, a differential pressure occurs causing the valve to suddenly close. The flow and mass of water is then directed through the non-return valve into the delivery port at a higher pulsed pressure.

how it works step 2 hydraulic ram pump

This pressure suddenly reduces causing the main valve to reopen and the cycle repeats.

how it works step 3 hydraulic ram pump

Turning the adjuster to open
the valve allows flow through
the pump to be regulated so
that a greater flow generates a
greater pressure and water delivery.

Animation of the pumping cycle

how the Papa hydraulic ram pump works cycle animation
Water Delivery Principles

For your proposed Papa Pump site to be viable you must have...

A spring, stream or river with a flow of at least 50 liters per minute

and the watercourse must fall to give you a Supply Head of a least 1 meter.
The Supply Head is the difference between the highest point of your watercourse and the lowest point across your land

The greater the Supply Head, the greater the amount of water you can deliver
and the higher you can potentially lift the water.

The main objectives to planning an efficient system is to maximise the Supply Head but to keep the Supply Pipe (between the Supply Tank and the Pump) as short as possible.  You can achieve this by running the Feed Pipe (between the Catchment and the Supply Tank) along the contours of the land as shown below.

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Will my site be suitable?

measure and plan your site

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Ready to Install?

installing your system

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Want to know more?

frequently asked questions

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