Re: PRV before pump inlet?
Posted by KevinS on May 15, 2003 at 13:23:52:
In response to Re: PRV before pump inlet?
It was my understanding that a PRV can still allow a high flow, but will reduce the pressure (dissipated on the spring). The pump is designed to work as low as 0.1 bar inlet. If I gave it 0.7, wouldn't that be likely to supply within it's tolerances?

: You never restrict the flow to the inlet of any pump. Doing so will cause cavitation and damage/destroy the pump.

: : I have a 0.2 bar (2M head) cold water supply and a 2.1 bar (maximum) hot water supply. I also have a shower pump/mixer that has an inlet min-max range of 0.1 bar to 1 bar.

: : My question is this: is it advisable to use a Pressure Reducing Valve (PRV) to reduce the hot supply pressure to, say 0.5 bar, before the inlet to the pump?

: : My worry is that the draw from the pump will fight with the PRV and cause problems, and the shower unit was a bit too expensive to risk without advice!

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