RECIPROCATING PUMP
The reciprocating pump is a positive displacement pump . i.e it operates on the principles of actual displacement or pushing of liquid by a piston that executes a reciprocating motion in a closing fitting cylinder .
OPERATION OF A RECIPROCATING PUMP
A reciprocating pump consists essentially of
1 . A piston or plungers that reciprocates moves backward or forward in a closely fitted cylinder .
2 . Suction and delivery pipes which are provided with non returns value . a suction valve in suction pipe and delivery valve in delivery pipe .
3 . Crank and connecting and mechanism operated by a power source which may be a stream engine an internal combustion engine or an electric motor .
In a single reciprocating pump liquid act on one side of the piston only . When the crank turn clockwise the piston moves outward to the right and rarefaction develop in the left space of cylinder . The suction stock is complete and the left side of cylinder is full of liquid . The increase in pressure cause the suction valve to close and discharge valve to open .
In a double acting reciprocating pump suction and delivery strokes occur simultaneously When the crank turn clockwise rarefaction is caused on the left side of the piston and liquid is sucked from the pump through the suction valve .
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