What Is a Reciprocating and Centrifugal Pump

The name “reciprocating pump” refers to all pumps in which the water is displaced either by a plunger, piston, bucket and so on. The reciprocating pump and centrifugal pump are two different concepts. They are separately name after the function and structure. The working principle of the reciprocating pump is to make the water circulate. For example, the hot water in the heat supply pipeline is circulated by this pump.

This type of pump is composed of a closed cylinder in which a piston moves to and fro by a connecting rod. The connecting rod is again hinged with a wheel which is rotated by a motor. During the suction stroke, the suction valve is opened and delivery valve remains closed and water enters the cylinder.

During the delivery stroke, the delivery valve is opened and the suction valve remains closed and the water is forced through the delivery pipe. An inlet is provided for priming which is necessary for starting the pump. The reciprocating pump is characterized by the following features. What comes first is high efficiency. Secondly, it can reach the very high pressure. The changes of the pressure almost do not affect the flow rate. Therefore, this pump can provide the stable stream flow.

What’s more, the double-acting pump and the multiple piston pump can obviously improve the heterogeneity of the stream flow. Last but not least, compared with the centrifugal pump, the reciprocating pump has more complex structure, larger size and slower speed. Because of this above-mentioned feature, a professional pump valve is needed. There is no doubt that the manufacturing cost and the installation expense are a little higher. The piston pump is mainly applicable to supply the water. The hand piston pump is widely used in the family life. As for the plunger pump, it can provide the high-pressure fluid.