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This utilises the low pressure generated by high velocity water flow around a curve-shaped elastomeric{{w|Elastomeric}} valve (with low pressure loss) to allow a valve design that enables rapid closure and with a relatively small cross sectional area and low weight. This 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 allowed  the pump structure to be concentric and therefore inherently strong and upon closure of the valve, permits efficient water delivery by acting in line with the supply via a second smaller venturi effect delivery non return valve{{w|Non_return_valve}}. The elastomeric material and operation of these valves also allows them to self-return without weight or spring assistance.
This utilises the low pressure generated by high velocity water flow around a curve-shaped elastomeric{{w|Elastomeric}} valve (with low pressure loss) to allow a valve design that enables rapid closure and with a relatively small cross sectional area and low weight. This 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 allowed  the pump structure to be concentric and therefore inherently strong and upon closure of the valve, permits efficient water delivery by acting in line with the supply via a second smaller venturi effect delivery non return valve{{w|Non_return_valve}}. The elastomeric material and operation of these valves also allows them to self-return without weight or spring assistance.


A pressure vessel{{w|Pressure_vessel}} installed on a tee connected to the delivery port of the pump provides the pulsed flow accumulation means. This unique technology and design dramatically reduced the weight, manufacturing cost and number of components required - as well as providing an overall improvement in efficiency. Additional patents granted to Selwyn have since been developed by UK companies Papa Ltd and Water Powered Technologies Ltd<ref>[http://www.waterpoweredtechnologies.com/ Water Powered Technologies – Composite Hydraulic Ram Pump inventors and patentees.]</ref> of Bude{{w|Bude}}, [[Cornwall]], further enhancing the technology to include a composite material{{w|Composite_material}} injection-moulded{{w|Injection_moulded}} pump allowing for relatively low cost mass production{{w|Mass_production}} whilst maintaining high strength, low weight and high performance previously only attainable with metal units.
A pressure vessel{{w|Pressure_vessel}} installed on a tee connected to the delivery port of the pump provides the pulsed flow accumulation means. This unique technology and design dramatically reduced the weight, manufacturing cost and number of components required - as well as providing an overall improvement in efficiency. Additional patents granted to Selwyn have since been developed by UK companies Papa Ltd and Water Powered Technologies Ltd<ref>[https://www.waterpoweredtechnologies.com/ Water Powered Technologies – Composite Hydraulic Ram Pump inventors and patentees.]</ref> of Bude{{w|Bude}}, [[Cornwall]], further enhancing the technology to include a composite material{{w|Composite_material}} injection-moulded{{w|Injection_moulded}} pump allowing for relatively low cost mass production{{w|Mass_production}} whilst maintaining high strength, low weight and high performance previously only attainable with metal units.


Other Papa ram pump related innovations include:
Other Papa ram pump related innovations include:


i) '''Sureflow'''<ref>[http://www.waterpoweredtechnologies.com/sureflow/ Sureflow ram pump control system]</ref> valve - an automatic regulator valve system which can be simply installed into the Papa pump exhaust port to allow the maximum utilisation of water supply from low or seasonally variable sources without the need to manually adjust the pump.
i) '''Sureflow'''<ref>[https://www.waterpoweredtechnologies.com/sureflow/ Sureflow ram pump control system]</ref> valve - an automatic regulator valve system which can be simply installed into the Papa pump exhaust port to allow the maximum utilisation of water supply from low or seasonally variable sources without the need to manually adjust the pump.


ii) '''Venturo'''<ref>[http://www.waterpoweredtechnologies.com/venturo/ Venturo high volume ram pumps]</ref> pumps - scaled-up ram pumps with 500mm and 1 metre diameter inlets for large river, marine tidal and flood applications.
ii) '''Venturo'''<ref>[https://www.waterpoweredtechnologies.com/venturo/ Venturo high volume ram pumps]</ref> pumps - scaled-up ram pumps with 500mm and 1 metre diameter inlets for large river, marine tidal and flood applications.


iii) '''Hydromentum'''<ref>[http://www.waterpoweredtechnologies.com/hydromentum/ Hydromentum rainwater harvesting system with Papa ram pump technology system]</ref> - systems developed with integral Papa pumps for [[rainwater harvesting]].
iii) '''Hydromentum'''<ref>[https://www.waterpoweredtechnologies.com/hydromentum/ Hydromentum rainwater harvesting system with Papa ram pump technology system]</ref> - systems developed with integral Papa pumps for [[rainwater harvesting]].


iv) '''[[Seradisc_Variable_Screen_Filter]]'''<ref>[http://www.seradisc.com/ Seradisc new technology adjustable filter screen]</ref> filter screen - adjustable for different size particulate screening. Seradisc filters are supplied with the Papa pump kit.
iv) '''[[Seradisc_Variable_Screen_Filter]]'''<ref>[http://www.seradisc.com/ Seradisc new technology adjustable filter screen]</ref> filter screen - adjustable for different size particulate screening. Seradisc filters are supplied with the Papa pump kit.
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== External links ==
== External links ==
* [http://www.waterpoweredtechnologies.com/papa_pump/ www.waterpoweredtechnologies.com/papa_pump/]  
* [https://www.waterpoweredtechnologies.com/papa_pump/ www.waterpoweredtechnologies.com/papa_pump/]  


== Interwiki links ==
== Interwiki links ==

Revision as of 09:51, 31 March 2017

The Papa 2" hydraulic ram pump

Hydraulic ram pumps, often known as hydramsW, are water pumps powered by nothing more than a flow of water.

The Papa ram pump is a 21st century version of the traditional hydraulic ram, being smaller, lighter, cheaper and more efficient.


History

In 1996 an English engineer, Frederick Philip Selwyn, patented a ‘fluid pressure amplifier’ which differed in many ways to the contemporary ram pump technology by the development of a venturi effectW waste valve.[1]

This utilises the low pressure generated by high velocity water flow around a curve-shaped elastomericW valve (with low pressure loss) to allow a valve design that enables rapid closure and with a relatively small cross sectional area and low weight. This 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 allowed the pump structure to be concentric and therefore inherently strong and upon closure of the valve, permits efficient water delivery by acting in line with the supply via a second smaller venturi effect delivery non return valveW. The elastomeric material and operation of these valves also allows them to self-return without weight or spring assistance.

A pressure vesselW installed on a tee connected to the delivery port of the pump provides the pulsed flow accumulation means. This unique technology and design dramatically reduced the weight, manufacturing cost and number of components required - as well as providing an overall improvement in efficiency. Additional patents granted to Selwyn have since been developed by UK companies Papa Ltd and Water Powered Technologies Ltd[2] of BudeW, Cornwall, further enhancing the technology to include a composite materialW injection-mouldedW pump allowing for relatively low cost mass productionW whilst maintaining high strength, low weight and high performance previously only attainable with metal units.

Other Papa ram pump related innovations include:

i) Sureflow[3] valve - an automatic regulator valve system which can be simply installed into the Papa pump exhaust port to allow the maximum utilisation of water supply from low or seasonally variable sources without the need to manually adjust the pump.

ii) Venturo[4] pumps - scaled-up ram pumps with 500mm and 1 metre diameter inlets for large river, marine tidal and flood applications.

iii) Hydromentum[5] - systems developed with integral Papa pumps for rainwater harvesting.

iv) Seradisc_Variable_Screen_Filter[6] filter screen - adjustable for different size particulate screening. Seradisc filters are supplied with the Papa pump kit.

How the Papa ram pump works

Papapumps.jpg
How the papa pump works blue.jpg

Construction

The Papa pump delivery hose assembly

The main body parts of the Papa pump are manufactured from a high-performance engineering composite which was specifically developed by Italian company Lati S.p.A.[7] for metal replacement applications. This results in a pump weight of 2kg compared to a 2" traditional ram pump which weighs around 95kg.

The integral main valve and non-return valves are manufactured from an elastomericW compound specially developed by Water Powered Technologies in conjunction with a number of UK suppliers over several years to ensure optimum performance under the many different water conditions which may be encountered. A spring-loaded pressure-relief valveW is incorporated into the pump which also doubles as a manual bleed valve.

Unlike a traditional ram pump which contains an integral pressure vessel, the Papa ram pump is supplied with a separate pressure vessel and external non-return valve mounted as part of a hose assembly. This separate pressure vessel contains a diaphragm whereby the air cushion is separated from the water. Adjusting the air pressure in the pressure vessel is carried out by using a standard hand or foot pump. The pressure should be set to 0.5 barW below the delivery head pressure (10m = 1 bar); for example with a delivery head of 50m, the air pressure should be set to 4.5bar.

Performance

Papa pump performance

Applications

Many applications for the Papa pump exist, including livestock watering, agriculture, horticulture, irrigation, rainwater harvesting, aquacultureW, catchment management etc. Papa pumps have also been used in water treatmentW and other water utilityW applications, especially beneficial where the utility is in a remote area. Application examples:

References

Template:Reflist

External links

Interwiki links

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