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Pressure Reducing & Relief Valve 2010-11-30
There is a formal answer and a less formal answer.Informally, if your only purpose is to test the performance of a pump and not to protect from overpressure failure
Various Pressure Ratings Vs Working Pressure/Testing Pressure 2010-11-30
Can help in giving the full working pressure for various pressure classes such as:
choke valve as PRV 2010-11-30
Just looking for thoughts on using a 'control choke' as a pressure reducing valve- max pressure expected to be 475 psi.
Hydropower from water mains 2010-11-29
If the water is pumped, any energy you extract with your generation would have to be supplied by the pumps.
Variable sped drive for a pump motor in a shower 2010-11-29
All energy regulatory bodies need to learn how to read a pump curve. As LionelHutz said, "energy savings guides showing VFD's as automatic energy savers are "stupid"", and so are the people who belie
Pressure Valve Chattering 2010-11-29
One of the main reasons I have found for chattering of a safety valve is improper line sizing. Specifically, the inlet line to the safety valve.
Excessive Pressure Drop in Pressure Reducing Valve 2010-11-26
Fisher 627WH pressure regulator, used in anhydrous ammonia service. This valve was originally going to see up to ~750 psig and drop it down to 300 psig
pressure-reducing upstream pressure-sustaining 2010-11-26
The cascading failure is one valve closes up (for whatever reason) and the following valves see no pressure upstream so they open wide trying to maintain setpoint and not able to.
