TJ Smith Posted December 17, 2017 Share Posted December 17, 2017 At what rpm are hyd pumps rated? 1f your pump is rated at 16 gpm at what rpm is that rated at? 1725 or 3450 Quote Link to comment Share on other sites More sharing options...
Judson Yaggy Posted December 18, 2017 Share Posted December 18, 2017 Wrong kind of question. Gpm is driven by rpm. Reputable sellers should tell you the pump displacement per one revolution. Do the math based on your motor speed from there. Pumps also have a MAX rpm, but can be run slower for lower output. Quote Link to comment Share on other sites More sharing options...
TJ Smith Posted December 19, 2017 Author Share Posted December 19, 2017 Right kind of question. My pump is already rated at 16 gpm. what rpm does it need to turn to achieve that? Most sellers rate their pump at gpm not at pump replacement per 1 revolution. Check Northern Tool Quote Link to comment Share on other sites More sharing options...
wpearson Posted December 19, 2017 Share Posted December 19, 2017 3600 Quote Link to comment Share on other sites More sharing options...
Marc1 Posted December 19, 2017 Share Posted December 19, 2017 TJ, flow in a hydraulic pump is the result of displacement and rpm. Different pumps will have different maximum rpm so two pumps may have the same flow but at different rpm due to their construction. A heavy pump may cavitate if driven at 2500 rpm when a smaller lighter one may be ok at 4500 rpm. When you read the specs of a pump you will see displacement in a unit of volume like cc or cubic inches, then Max speed for that pump, maximum flow at that particular maximum speed, and pressure. So there is no set RPM to rate all pumps unlike air compressors that can rate a compressor in CFM simply because they are driven by an electric motor that has a constant and known speed. Hydraulic pumps are rated at their maximum speed and that maximum speed is dependent from their construction. Quote Link to comment Share on other sites More sharing options...
BeaverNZ Posted December 19, 2017 Share Posted December 19, 2017 Yes, here pumps are sold as a certain displacement per rev as well so output is easy to work out cc"s x revs or cu"x revs Quote Link to comment Share on other sites More sharing options...
Marc1 Posted December 20, 2017 Share Posted December 20, 2017 It's max revs. Can be anything. Quote Link to comment Share on other sites More sharing options...
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