Hydraulic Institute Pump FAQs

Creating Pump Standards since 1917.
Good suction piping design must eliminate air entrainment in the liquid, minimize friction loss, provide straight and uniform flow at the pump inlet and avoid excessive forces due to pipe strains at the pump.
Answers to frequently asked questions provided by the Hydraulic Institute.
Is there a way of predicting the maximum operating speed for a reciprocating plunger pump when pumping a viscous liquid?
HI answers your pump questions.
The preferred method for starting reciprocating pumps; Critical speed for pumps; Timing gears on rotary pumps
I know that slurries require special attention when being pumped. What characteristics of slurries should be given consideration when specifying a rotodynamic pump?
Q. Our office building has a pump room in the basement, which causes sufficient noise to be bothersome to the people in the office above it. What can be done to reduce the noise?
Multiple pumps, the effects of the viscosity of a pumped liquid on the Net Positive Suction Head Required (NPSHR)and zero flow rate protection for air-operated pumps are discussed.
Discharge recirculation, pipe strains and gas entrained in a liquid are discussed.
HI answers your frequently asked questions.
Questions and answers regarding all things pumps.
HI answers your frequently asked questions
HI answers your frequently asked questions.
Q. What is a jet pump? I do not see any reference to it in your standards and would like to learn more about it.
HI answers readers' questions about pump alignment, pump maintenance and head developed by an impeller.
Q. Simplicity and low cost make rotary pumps a good choice for some applications. Is there a simple guide to the maximum flow rate and discharge pressure for which such pumps can be used?
How can we tell if a pumping system is designed and operated properly?
Q. Our pumps take their suction from an open tank.

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