Reciprocating Pump

Question 1

Piston Displacement (Vd)
If piston is neglected

Answer 1

Vd= LAN Na

Where: Na = if 2 (double action)
A = π/4(D^2)
N = rpm
L = length of stroke

Question 2

Piston Displacement (Vd)
If Piston rod is considered

Answer 2

Vd = (2LANNa)cyl - (LAN)piston rod

Question 3

Actual Discharge (V.)

Answer 3

V. = A V

Where: the same as V heheh sa pump

Question 4

Slip (S)

Answer 4

S = Vd - V.

Vd = displacement
V. Actual Discharge

Question 5

Percent Slip (%S)

Answer 5

%S = S / Vd
= Vd - V /Vd

Question 6

Volumetric Efficiency (ev)

Answer 6

ev = V. / Vd