Submersible Reflux Pump

The submersible reflux pump is a piece of equipment specially designed for sewage treatment. It is mainly used for the reflux and denitrification and denitrification processes of mixed liquid in secondary sewage treatment plants. It uses a submersible motor to drive the impeller to rotate, generating centrifugal force to transport the liquid from a low place to a high place, realizing the return and circulation of the liquid. This kind of pump is suitable for municipal engineering, sewage treatment, agricultural irrigation and other places.

Heavy Traffic
When operating, a submersible return pump can achieve very high flow rates at low head (the vertical height at which the pump can lift liquid). For example, when the head is 1 meter, the maximum flow rate of the submersible return pump can reach 6,000 cubic meters per hour, which is about 20% higher than similar products. This not only meets the demand for large flow rates in the return flow of sewage treatment plants, but also significantly reduces power consumption by reducing motor load.

Compact Structure
The submersible reflux pump integrates the motor and pump body, and the overall structure is 30% smaller than the traditional split pump. Its volume is only 1.2 cubic meters, while traditional pumps require additional independent driving equipment and occupy an area of ​​more than 2 square meters. This compact design is particularly suitable for locations with limited space between equipment, such as municipal sewage treatment plants or industrial circulating water systems.

Corrosion Resistance
The key components of the submersible return pump are made of 316L stainless steel, which improves corrosion resistance by more than 40% and can operate for a long time in an environment with a pH value of 3-10. For example, the service life of a submersible return pump in high-salinity sewage is more than 10 years, which is at least 5 years longer than a conventional cast iron pump.

Low Noise Operation
The operating noise of the submersible return pump is less than 50 decibels, which complies with the industrial noise control standard (ISO 3746). Compared with the traditional external pump whose noise reaches 65 decibels, the noise is reduced by more than 25%, which can provide employees with a more comfortable working environment.

• Liquid temperature: ≤ 40℃
• PH: 5~9
• Liquid density: ≤1150kg/m³
• Max working depth: 20m
• The pump shall not be lower than the minimum level during operation, refer to "minimum level" in the installation size diagram.
• The maximum diameter of the solid particles passing through the pump shall not be greater than 15% of the outlet diameter of the pump body.

The submersible reflux pump uses a guide rod and automatic coupling installation system. The guide rod is fixed to the tank wall, and a lifting system and through-wall discharge pipe are installed and secured at the edge of tank. The pump can slide freely up and down along the guide rod, making installation and maintenance extremely convenient.
Except for the through-wall discharge pipe that requires pre-embedding, the guide rod and hoisting device are connected to the tank with chemical bolts, eliminating the need for pre-embedded parts.

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