Rule of thumb for determining pump casing volume

[eeprom]

Hello,
Is there a rule of thumb for determining the volume of a centrifugal pump casing based on the Hp? For example, for a 50 Hp pump, I'd assume that the pump casing would be at least 1 ft^3. Is this reasonable?

thanks,
EE

 

[BigInch]

no

take a cylinder and outside diameter is a function of the head you need and pump speed, interior cylinder diameter you assume is hollow and a function of hub size and length of the cylinder is a function of flowrate and pump speed.

What would you be doing, if you knew that you could not fail?

 

[bimr]

The horsepower is directly related to pressure and flow.

HP = Q * H * SG / (3960 * EFF)

Where:

P = Power, hp
Q = Flow Rate, gpm
S = Specific Gravity of fluid
H = Head height, ft
EFF = Efficiency coefficient

Since Q = AV; Yes the pump casing size is somewhat related to the pump HP. But since the pump can be low to high speed and the volume is inversely proportional to the speed, there is no rule of thumb.

 

[eeprom]

Thanks