determining pump pressure based on max pressure
determining pump pressure based on max pressure
(OP)
We are feeding an in-line homogenizer with a Wasukesha pump. Given the literature value of maximum pump pressure, is it possible to predict the pump pressure at various speeds?





RE: determining pump pressure based on max pressure
RE: determining pump pressure based on max pressure
The pump literature is not likely going to help you. Pump discharge pressure is going to be set by the processing equipment and piping/control systems, final destination, etc downstream of the pump.
RE: determining pump pressure based on max pressure
I think it is quite possible to predict the maximum pump pressure your system will produce. If you're calculating this to ensure that the piping and/or equipment downstream of the pump will not be overpressurized, then proceed as follows:
1) Determine the maximum source pressure, which would typically be the maximum pressure in the vessel feeding your pump. (Be conservative - I suggest using a PSV set point if applicable).
2) Add static head going to the pump.
3) Add the pump's differential head when deadheaded (zero flow=maximum head)
The methodology described essentially defines the information requirements that you will need to satisfy.
Good Luck,
Doug
RE: determining pump pressure based on max pressure
1 A relief valve lifts.
2 Something - e.g. a flange or pump internals give way.
3 The back slippage through the pump equals the forward motion.
4 The motor is no longer able to produce the required energy and so trips on high amps.
The max. pressure may simply be the design pressure of the pump. Speeding it up will not help - it will only affect the flowrate (Unless the back slippage is the issue).
On the other hand, if it's a centrifugal pump, you can use the pump affinity relationships.
As TD2K stated - we need more details to help.