Design Pressure for Screw Pumps
Design Pressure for Screw Pumps
(OP)
I was recently made aware for high pressure screw pump. The design pressure of the inlet and outlet side is different. Example if the design of the discharge side is 80bar, then maybe be the suction side is design at 40bar. Is this a common practice, for screw pump manufacturer. API std doesn't seems to cover this.
Any thoughts on the advantage and disavantage of such design.
Thank you
1ton
Any thoughts on the advantage and disavantage of such design.
Thank you
1ton





RE: Design Pressure for Screw Pumps
Regulations and standards aside, if there's no circumstane in which the inlet could be pressurized to the discharge pressure level, a little asymmetry could produce a modest weight savings.
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: Design Pressure for Screw Pumps
Regards checman
RE: Design Pressure for Screw Pumps
http:/
They also have the Cameron Hydraulic Data Book $39.50
https://
RE: Design Pressure for Screw Pumps
The disadvantage would be that if some other pressure source exists, such as backflow from downstream or from the spare pump, then an overpressure protection would be needed in case the suction block valve was closed with the discharge valve left open. A PSV on the suction piping may be needed, or this may be able to handled procedurally (eg car sealing suction valve open, etc).