Self-priming Pump (WZB)

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Self-priming Pump (WZB) Industry Knowledge Extension

What Is Self-Priming Pump?

The self-priming pump is a centrifugal pump with a self-priming function. Different from ordinary centrifugal pumps, self-priming pumps do not need manual irrigation before starting, can automatically absorb liquid, and maintain a self-priming state during normal operation.
The self-priming ability of the self-priming pump is realized by the special design between the pump casing and the impeller. There is an air chamber with a self-priming function inside the pump casing, and the impeller has a certain self-priming ability. When the pump is started, the impeller rotates at a high speed, and the liquid is thrown off the impeller and enters the air chamber in the pump casing, generating a negative pressure, so that the pump automatically sucks the liquid. Once the pump starts to run, the air is compressed and discharged, the self-priming function will disappear, and the pump will work like a normal centrifugal pump.
Self-priming pumps are often used to handle liquids containing air or gas, such as water pumping stations and sewage stations. Additionally, they can be used in applications such as pouring concrete, refueling and delivering clean water, among others.

What Are the Advantages of Self-Priming Pumps over Ordinary Centrifugal Pumps?

Compared with ordinary centrifugal pumps, self-priming pumps have the following advantages:
1. Strong self-priming ability: The self-priming pump has a self-priming function, with no need for manual irrigation, it can automatically absorb liquid, and maintain a self-priming state during normal operation. This means that there is no need for manual irrigation before starting, and the self-priming pump can quickly recover its self-priming capacity in the event of a power failure or pipeline rupture, reducing operational difficulty and maintenance costs.
2. Easy to operate: The self-priming pump has the characteristics of quick start, simple operation and convenient maintenance, and is suitable for some process control systems with a high degree of automation.
3. Wide range of applications: Self-priming pumps are suitable for conveying different types of liquids, such as water, sewage, oil, solutions, acids, etc. It is widely used in water treatment, sewage treatment, construction, agriculture, petroleum, chemical industry and other industries.
4. Compact structure: Self-priming pumps are usually small in size and compact in structure, easy to install, move and maintain, and do not require additional suction lines or pumping systems.
5. Low cost: Compared with other types of pumps, the cost of self-priming pumps is relatively low, especially for some small and medium-sized liquid delivery systems, which have good economy and applicability.

How to maintain Self-Priming Pump?

1.Regular Inspection: Perform routine visual inspections of the pump, including its components, connections, and fittings. Look for signs of leaks, corrosion, damage, and wear. Address any issues you find promptly.
2.Lubrication: Some self-priming pumps require lubrication for certain components, such as bearings. Check the manufacturer's recommendations for lubrication intervals and types of lubricants to use.
3.Cleaning: Keep the pump and its surrounding area clean and free from debris, dirt, and dust. Regular cleaning prevents clogs and ensures efficient operation.
4.Impeller Inspection: The impeller is a critical component for pumping efficiency. Inspect the impeller for wear, damage, or signs of blockage. Clean the impeller if needed, and replace it if it's worn out.
5.Check Gaskets and Seals: Inspect gaskets and seals for signs of wear or leakage. Replace any damaged or worn gaskets or seals to prevent fluid leaks.
6.Suction Strainer Maintenance: If your self-priming pump has a suction strainer, clean it regularly to prevent debris from entering the pump and affecting its performance.

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