Dead Head Suction Pressure
Dead Head Suction Pressure
(OP)
All,
My question is based on the case where the flow of a centrifugal pump is blocked at the output and you end up with a no-flow situation. I would assume that since there is no flow, the suction pressure of the pump would be equal to the upstream pressure, and the discharge pressure is equal to the suction + head. Is this the case?
Best regards,
Andrew
My question is based on the case where the flow of a centrifugal pump is blocked at the output and you end up with a no-flow situation. I would assume that since there is no flow, the suction pressure of the pump would be equal to the upstream pressure, and the discharge pressure is equal to the suction + head. Is this the case?
Best regards,
Andrew





RE: Dead Head Suction Pressure
-pmover
RE: Dead Head Suction Pressure
Just assume you have a multistage centrifugal pump for higher pressure and you close the discharge line. Will your suction side pipework with valves then see the high discharge pressure?
RE: Dead Head Suction Pressure
rmw
RE: Dead Head Suction Pressure
The suction pressure will not be equivalent as the discharge pressure. From the pump safety perspective, the pump would trip off when it exceeds it maximum pressure switch set point. Therefore, the envisaged scenario would not occur.
RE: Dead Head Suction Pressure
Thank you for the responses! Do any of you know a good text where I can read up on the physics behind this potential situation? For reference, I am trying to configure a simulation that is able to model these conditions.
RE: Dead Head Suction Pressure
With the exception of pmover, I think the others has miss read the OP's question.
"the suction pressure of the pump would be equal to the upstream pressure, and the discharge pressure is equal to the suction + head. Is this the case?"
He did not said the discharge pressure is equal to the discharge pressure.
RE: Dead Head Suction Pressure
He did not say the suction pressure is equal to the discharge pressure.