submersible sewage pump

submersible sewage pumpThe working principle mainly depends on its internal design. The pump body is equipped with a liquid storage chamber, which is connected to the pump working chamber through the upper reflux hole and the lower circulation hole, forming an axial flow external mixing system. After the pump stops working, there is already a certain volume of liquid stored in the pump chamber. When the pump is started, the impeller throws the stored liquid and air upward together, and the liquid flows back to the working chamber through the gas-liquid separation tube, while the gas is discharged outside the pump, forming a self-priming effect.

choicesubmersible sewage pumpWhen, the following parameters must be clearly defined:

1. Flow rate (Q): The volume of liquid that needs to be discharged per unit time (m ³/h or L/s). Determine based on the drainage volume.

2. Head (H): The total height (in meters) that the pump can lift the liquid. Total head=lifting height+pipeline loss along the way+local loss. This is one of the most important parameters for selection.

3. Medium characteristics:

Solid particle diameter/fiber content: determines which impeller type to choose (non clogging or cutting).

◆ Medium temperature, pH value, corrosiveness: determine the material of the pump body (such as cast iron, stainless steel 304/316).

Medium specific gravity: affects the selection of motor power.

4. Installation environment: diameter and depth of the well/pool, water inlet method, whether it is fixed installation or mobile use.

5. Power supply: single-phase (220V) or three-phase (380V) power supply.

Precautions for use and maintenance

● Correct installation: Ensure that the guiding device is secure and avoid the pump sinking directly to the bottom and being blocked by sludge at the inlet. Coupling installation should ensure proper connection.

It is strictly prohibited to operate without water: Operating without water will burn mechanical seals and motors.

● Regular inspection: Regularly check the insulation resistance, sealing condition, and whether the cables are damaged. If not in use for a long time, water surface cleaning and maintenance should be proposed.

Overload protection: Ensure that the overload and leakage protection devices inside the control cabinet are effective.

● Preventing entanglement: For wastewater containing a large amount of long fibers, a filter can be installed at the inlet, or a cutting pump can be directly selected