**Discharge of a reciprocating pump**

The discharge of a reciprocating pump is given by the following formula

**Q**

_{t}= A L Nwhere

**Q**is the theoretical discharge in m

_{t}^{3}

**A**is the Area of the piston in m

^{2}

**L**is the length of the stroke in m

**N**is the number of the revolutions of the crank per second (rps)

**Coefficient of Discharge**

The Coefficient of Discharge of a reciprocating pump is the ratio of the actual discharge to the theoretical discharge.

**C**

_{d}= Q_{a}/ Q_{t}Where

**C**is the Coefficient of Discharge

_{d}**Q**is the actual discharge in m

_{a}^{3}

**Q**is the theoretical discharge in m

_{t}^{3}

**Slip in a Reciprocating pumps**

Slip in a Reciprocating pump is the difference between the theoretical discharge and the actual discharge.

Slip =

**Q**-

_{t }**Q**

_{a}