mathmatical formula for volumetric effiency of duplex single acting reciprocating pump?

Question

duplex single acting pump makes 190 strokes/min with 3" cyl. and 12" stroke and 90%volumetric effiency. how do you calculate this ?

Answer 1

Volumetric efficiency of pump = volume pumped/volume cylinder, or in other words ratio of actual vs theoretical volumes.

Answer 2

Since you did not make it clear what you want to calculate (what do you mean by "this") I can only make assumptions.
In science and engineering you will find that assumptions are the start of all mistakes. That statement has a more effective wording but...

The question doe not provide enough information to calculate the volumetric efficiency so and the 190 strokes per minute would be just extra info in that case, I will assume you want to calculate the actual volume pumped.

0.9 * 190 * 12" * 3.14159 * (3" / 2)^2 = 14,500 cubic inches per minute
That would be for a single acting pump multiply by 2 for a double acting pump.

Edit.
Make that for a simplex single acting multiply by 2 for a duplex single acting.

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Andre' B.

Answer 3

Reciprocating Pump Efficiency

Answer 4

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