I read that the suction lift of any pump is a maximum of 34 feet ideally, but actual it's round about 22 feet for positive displacement pump and 15 for dynamic pumps. How can we get water in the house where the depth of water is more than 200 feet? Which type of pump is used there? Also, what is meant by donkey pump? How suction is carry out in the pump's suction side?
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Re: Pump suction lift
14 November 2006 at 1:29pmIn response to the first question, 34 feet is atmospheric pressure of cold water at seal level.The actual suction lift capability of a pump is dependent on its efficiency and its ability to draw a vacuum. Some p.d. Pumps do this very well while others do not. Conventional centrifugal pumps dont do very well on a suction life unless they are fully primed. A self-priming pump can handle up to 25 feet of a suction lift.
For raising a pump from a depth of 200 feet, I would recommend a vertical turbine pump with a submersible motorm, which is sometimes referred to as a borehole pump.
My only memory of the phrase a donkey pump stems from early fire protection systems where the donkey pump was a small pump used to maintain pressure in the fire protection system so that the main pumps would start when necessary.
I do not understand the question regarding pump suction.
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