Duplex Pump - Circulation System Mud Pumps

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Duplex Pump -
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** Vol. Displaced by each
piston during on the forward
stroke
:

** On the backward stroke of

each piston, the displaced vol.:





** Vol. Displaced by each piston
during on complete cycle





**  The pump factor (Fp) for a
duplex pump (two cylinders):












The flow rate (q) of the pump is obtained by :
q (bbl/min) = Fp (bbl/stroke) x N (stroke/min)