What is the difference between a centrifugal pump and a self-priming pump?

August 27, 2019

1. The composition is different: the basic structure of the centrifugal pump is composed of six parts: impeller, pump body, pump shaft, bearing, sealing ring, and stuffing box. In addition, the self-priming pump comprises a suction chamber, a liquid storage chamber, a scroll chamber, a liquid return hole, a gas-liquid separation chamber, and the like.

2, the advantages are not the same: the self-priming pump has a compact structure, easy operation, stable operation, easy maintenance, high efficiency, long life, and strong self-priming ability. On the other hand, the advantages of the centrifugal pump are compact structure, wide flow range and wide lift range, suitable for mild corrosive liquids, various control options, uniform flow, smooth operation, low vibration, no need for special shock absorption, equipment installation, maintenance,, and repair costs are lower.


3, the working principle is not the same: the working principle of the self-priming pump is to fill the pump casing with water before starting the pump (or the pump itself contains water). Then, after the start, the impeller rotates at high speed to make the water in the impeller channel flow toward the volute. At this time, the inlet forms a vacuum so that the inlet water stops the door, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel.


The centrifugal pump works by rotating the impeller to cause the water to move in a centrifugal motion. Before the pump is started, you must fill the pump casing and the suction pipe with water, and then the motor is started so that the pump shaft drives the impeller and water to perform high-speed rotation movement. The water is centrifugally moved and is raked to the outer edge of the impeller and flows through the volute pump casing. The road flows into the pressurized water line of the pump.


Fuan Zhongzhi Pump Co., Ltd


registered the trademark "ZOZHI."


Add:No.155 Shangcun Qinxiyang Industry Zone,Fuan city,Fujian,China

Tel:+86 0593 6532656 Fax: +86 0593 6531158

Mobile: +86.137.0604.0131

E-mail: sales@zz-pump.com

Website: www.zz-pump.com