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Is a centrifugal pump better or a self-priming pump better?

18 Feb 2021Email

   Is a centrifugal pump better or a self-priming pump? This depends on where it is used, and it cannot be singled out. The self-priming pump may be a centrifugal pump, but not necessarily a self-priming pump. When the self-priming centrifugal pump is started for the first time, a certain amount of starting circulating water must be injected into the pump body; each time the centrifugal pump is started, the inlet pipe and the pump body must be filled with water at the same time, or the inlet pipe must be pumped with auxiliary devices.

 

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

   1. Different composition

The basic structure of a centrifugal pump is composed of six parts, including the impeller, pump body, pump shaft, bearing, sealing ring and stuffing box, while the self-priming pump is composed of suction chamber, liquid storage chamber, and scroll chamber. , Liquid return hole and gas-liquid separation chamber.

  2, the advantages are different

The self-priming pump has the advantages of compact structure, convenient operation, stable operation, relatively easy maintenance, high efficiency and long life, and strong self-priming ability, while the advantage of centrifugal pump is compact structure , A wide range of flow and a wide range of head, more suitable for mildly corrosive liquids, a variety of control options, uniform flow, stable operation, low vibration, no need for special shock absorption foundation, equipment installation, maintenance and repair cost comparison low.

  3, the working principle is different

The working principle of the self-priming pump is that the pump is filled with water in the pump casing before starting (or there is water in the pump casing itself). After starting, the impeller rotates at a high speed to make the water in the impeller channel flow to the volute. At this time, a vacuum is formed at the inlet, so that the water inlet check door is opened, and the air in the suction pipe enters the pump and reaches the outer edge through the impeller channel. The centrifugal pump uses the rotation of the impeller to make the water produce centrifugal movement to work.

The difference between a self-priming pump and a centrifugal pump is that the self-priming pump is used for the first time without installing a bottom valve. After filling the pump cavity with water, starting the pump can reduce the liquid within 5 meters of the self-priming pump. Suction up (high suction lift self-priming pumps of Boyu Pump Industry can be used for those higher than 5 meters), and you do not need to add water every time you start the self-priming pump. This is the functional characteristics of self-priming pumps, self-priming The pump can also be used in the environment where the centrifugal pump is used and the liquid level is higher than the self-priming pump.

The centrifugal pump can only play the role of boosting and conveying. It does not have the function of a self-priming pump. It can only be used in an environment where the pipeline is pressurized. If you want to realize the function of a self-priming pump, you must install a bottom at the bottom of the pool. The valve, each time the pump and the inlet pipe are filled with liquid can suck the liquid up.

 

   2. What is the purpose of centrifugal pumps and self-priming pumps?

  1. Centrifugal pumps are mainly used for liquid transportation, cooling systems, industrial cleaning systems, aquaculture systems, and industrial equipment. They are also widely used for transportation in various industries such as electric power, metallurgy, coal and building materials.

  2. Self-priming pumps are more suitable for clean water, seawater, chemical medium liquids with pH and general mushy liquids. It is also a good machine for farms, nurseries, orchards and vegetable gardens. The self-priming pump can be used in conjunction with any filter press of any model and specification. It is also the most ideal matching pump for pressure filtration when the slurry is sent to the filter press.

Well, the above is the relevant knowledge about the difference between self-priming pumps and centrifugal pumps. The difference between self-priming pumps and centrifugal pumps lies in their different working principles, advantages and composition, but they are different. They have their own advantages, and the scope of application is also different. I hope that this article can help you.

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