PRODUCTS
BZ Self priming pump
The BZ series self-priming pump is a centrifugal self-priming pump that features a direct motor coupling structure. It boasts advantages such as compact design, easy operation, smooth and stable operation, simple and convenient maintenance, long service life, and excellent self-priming capability. Before operation, it only requires ensuring that a certain amount of priming liquid is stored in the pump body, which significantly reduces labor intensity.
The ZW series self-priming sewage pump has a structure similar to the BZ series, with the difference being that its impeller and pump body are designed with a wider flow passage. This enhances its ability to handle liquids containing large solid particles and fibrous waste, such as industrial wastewater.
Application
*Suitable for urban environmental protection, domestic water supply, construction, dyeing and printing, electroplating, papermaking, mining, equipment cooling, etc.
*The BZ series is suitable for conveying clean water and non-flammable, non-explosive liquids with physical and chemical properties similar to water. The ZW series is designed for liquids containing certain particles, solids, and fibrous contaminants, such as industrial wastewater.
*The liquid temperature is related to the self-priming height; excessively high temperatures may affect the self-priming capability.
Pump Structure
The BZ/ZW series centrifugal self-priming pumps primarily consist of the following components:Motor，Pump shaft，Water-blocking ring，Mechanical seal，Pump cover，Pump casing，Impeller，Base，Air-liquid separation chamber，Discharge outlet，Filling valve，Check valve disc，Inlet connection.
Working Principle
The pump operates based on an axial reflux external mixing system. The pump body is equipped with a liquid storage chamber, which is connected to the working chamber via an upper return hole and a lower circulation hole.
When the pump is stopped, the internal cavity retains a certain volume of liquid. Upon startup, the stored liquid is propelled upward by the impeller, entraining air. The resulting air-liquid mixture enters the air-liquid separation chamber. Here, the liquid is separated and recirculated back to the working chamber, while the gas is discharged from the pump. This process creates a vacuum in both the pump and the suction line, achieving the self-priming effect.
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