ZX self-priming centrifugal pump series, self-priming centrifugal clean water pump

I. Overview of ZX Self-Priming Centrifugal Pump

The ZX horizontal clean water self-priming centrifugal pump is a type of self-priming pump connected to the pump body via a coupling by a motor. Its main feature is the self-priming function; there is no need to install a foot valve in the pipeline. Before operation, it is only necessary to ensure that a certain amount of priming liquid is stored in the pump body, so as to realize the function of "one-time priming, lifelong self-priming". It has the advantages of compact structure, convenient operation, stable operation, easy maintenance, high efficiency and long service life. The pump body and flow-passing parts can be made of cast iron and various grades of stainless steel, and the motor can be equipped with frequency conversion and explosion-proof motors. It is widely used in industrial sectors such as petroleum, chemical industry, metallurgy, machinery, chemical fiber, food, energy, transportation, etc., for urban water supply, and can also be used for agricultural irrigation and sprinkler irrigation. It is used to transport clean water or other liquids with physical and chemical properties similar to clean water, with viscosity less than 5°E and temperature lower than 80℃.

II. Structural Principle of ZX Self-Priming Centrifugal Pump

The pump body of the ZX horizontal clean water self-priming centrifugal pump consists of a suction chamber, a liquid storage chamber, a volute chamber, a return hole, a gas-liquid separation chamber, etc., adopting an axial return structure. After the pump is started normally, the impeller sucks the liquid stored in the suction chamber and the air in the suction pipeline together, and they are fully mixed in the impeller. Under the action of centrifugal force, the liquid carrying gas flows toward the outer edge of the volute chamber, forming a certain thickness of white foam belt and a high-speed rotating liquid ring on the outer edge of the impeller. The gas-liquid mixture enters the gas-liquid separation chamber through the diffusion pipe. At this time, due to the sudden decrease in flow rate, the lighter gas is separated from the mixed liquid, and the gas continues to rise and discharge through the pump outlet. The degassed liquid returns to the liquid storage chamber, and enters the impeller again through the return hole, mixing with the gas sucked from the suction pipeline inside the impeller. Under the action of the high-speed rotating impeller, it flows to the outer edge of the impeller again. As this process repeats, the air in the suction pipeline decreases continuously until the gas is exhausted, completing the self-priming process, and the pump starts normal operation.

Some pump bearing bodies also have cooling chambers at the bottom. When the temperature rise of the bearing exceeds 70℃ due to bearing heating, coolant can be injected through any coolant pipe joint at the cooling chamber for circulating cooling. The sealing mechanism inside the pump to prevent liquid leakage from high-pressure areas to low-pressure areas is the front and rear sealing rings. The front sealing ring is installed on the pump body, and the rear sealing ring is installed on the bearing body. When the sealing rings are worn after long-term operation of the pump, affecting the pump's efficiency and self-priming performance, they should be replaced.

III. Product Details of ZX Self-Priming Centrifugal Pump

IV. Applicable Working Conditions of ZX Self-Priming Centrifugal Pump

① Applicable to urban environmental protection, construction, fire protection, chemical industry, pharmaceutical industry, dye, printing and dyeing, brewing, electric power, electroplating, paper making, petroleum, mining, equipment cooling, oil tanker unloading, etc.

② Applicable to clean water, seawater, chemical medium liquids with acidity and alkalinity, and general paste slurries (medium viscosity ≤100 centipoise, solid content up to less than 30%).

③ Equipped with a swing-arm sprinkler, it can spray water into the air and disperse it into fine raindrops for spraying, making it an excellent tool for farms, nurseries, orchards and tea gardens.

④ It can be matched with any type and specification of filter press, and is the most ideal matching pump for conveying slurry to the filter press for pressure filtration.

V. Model Parameters of ZX Self-Priming Centrifugal Pump