ZX Electric Cast Iron Horizontal Self-priming Pump, ZX Single-stage Horizontal Centrifugal Pump

1. Overview of ZX self-priming centrifugal pump

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

2. Structural principle of ZX self-priming centrifugal pump

The ZX horizontal clean water self-priming centrifugal pump is composed of a suction chamber, a liquid storage chamber, a volute chamber, a liquid return hole, a gas-liquid separation chamber and other parts, adopting an axial liquid return structure. After the pump starts normally, the impeller sucks the liquid stored in the suction chamber and the air in the suction pipeline together, and completely mixes them in the impeller. Under the action of centrifugal force, the liquid carrying gas flows to the outer edge of the volute chamber, forming a white foam belt with a certain thickness 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, as the flow rate suddenly drops, the lighter gas is separated from the mixed liquid, and the gas continues to rise and discharge through the discharge port of the pump body. The degassed liquid returns to the liquid storage chamber, and enters the impeller again through the return hole, and mixes again 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 keeps decreasing until all the gas is sucked out, completing the self-priming process, and the pump will put into normal operation.

Some pump bearing bodies are not equipped with cooling chambers at the bottom. When the bearing temperature rises above 70℃ due to bearing heating, cooling liquid can be injected through any one of the cooling pipe joints at the cooling chamber for circulating cooling. The sealing mechanism inside the pump that prevents liquid from leaking from the high-pressure area to the low-pressure area 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 wear out after long-term operation of the pump, which affects the efficiency and self-priming performance of the pump, they should be replaced.

3. Product details of ZX self-priming centrifugal pump

4. Applicable working conditions of ZX self-priming centrifugal pump

① It is suitable for urban environmental protection, construction, fire protection, chemical industry, pharmaceutical, dye, printing and dyeing, brewing, electric power, electroplating, papermaking, petroleum, mining, equipment cooling, tanker oil unloading and so on.

② It is suitable for clean water, seawater, chemical medium liquids with acidity and alkalinity, and general pasty slurries (medium viscosity ≤ 100 centipoise, solid content can reach below 30%).

③ Equipped with a rocker sprinkler, it can also flush water into the air and disperse it into fine raindrops for spraying, which is a good tool for farms, nurseries, orchards and tea gardens.

④ It can be matched with filter presses of any model and specification, and it is the most ideal supporting pump for sending slurry to the filter press for filter pressing.

5. Model parameters of ZX self-priming centrifugal pump