1. Discharge of seriously polluted wastewater from factories and businesses.
2. Drainage system of urban sewage treatment plants.
3. Sewage drainage stations in residential areas.
4. Drainage stations of civil air defense systems.
5. Sewage discharge from hospitals and hotels.

6.Municipal engineering and construction sites.
7. Exploration and mining auxiliary machines.
8. Rural biogas pools and farmland irrigation.
9. Water supply devices of water plants.

Product use conditions:
1. The medium temperature does not exceed 60℃, the density is 1.0~1.3kg/dm3, and the pH value is in the range of 5~9.
2. For pumps without internal gravity circulation cooling system, the motor part does not exceed 1/2 of the liquid surface.
3. In general, the pump must be used within the use head range to ensure that the motor is not overloaded. If it needs to be used within the full head range, it should be specified when ordering so that the manufacturer can manufacture it.
4. During operation, the pump motor current must not exceed the rated current of the motor.

Product structure description:
1. WQP and QWP stainless steel submersible sewage pumps are composed of two parts: the motor and the pump. The two parts are separated by an oil isolation chamber and a mechanical seal assembly. They are mechatronic products. The motor and the pump share the same shaft (rotor). The entire pump is short in length and compact in structure. Equipped with a variety of protection devices, the pump runs safely and reliably.
2. The functions of its main components are as follows:
Signal line 1: Equipped with a full-protection pump control cabinet to implement * protection for the pump, including water leakage, phase failure, short circuit, overheating, motor overload and other items.
Motor stator 8: Adopts Class B or Class F insulation.
Water leakage probe 11: This component is installed in the oil chamber. When the mechanical seal is damaged, water enters the oil chamber, and the probe can send a signal to protect the pump by the control system.
Mechanical seal 13: Adopts double-channel series seal, and uses a new type of hard and corrosion-resistant tungsten carbide material, which has the characteristics of reliable sealing, wear resistance and long life.
Impeller 17: The impeller adopts a single-channel or double-channel structure, with a strong passing capacity, capable of passing large materials and fiber garbage, reducing blockage and entanglement.
Pump body 15: Used with the impeller, the pump has a higher efficiency.
Sealing ring 18: Installed at the mouth ring of the pump body. When the mouth ring is worn due to the operation of the impeller, the sealing ring can be replaced to ensure that the pump runs at the highest efficiency.

Common fault analysis and troubleshooting methods

Product advantages:
1. The large flow channel anti-clogging hydraulic component design greatly improves the dirt passing capacity, and can effectively pass fiber materials 5 times the pump diameter and solid particles with a diameter of about 50% of the pump diameter.
2. Reasonable design, reasonable matching motor, high efficiency and good energy saving effect.
3. The mechanical seal adopts a double-channel tandem seal, made of hard and corrosion-resistant tungsten carbide, which is durable and wear-resistant, and can make the pump run safely and continuously for more than 8,000 hours. 4. The pump has a
compact structure, small size, easy to move, and easy to install. It does not need to build a pump room and can work by submerging in water, which greatly reduces the project cost.
5. An oil-water probe is installed in the pump oil chamber. When the mechanical seal on the water pump side is damaged, water enters the oil chamber, and the probe generates a signal to protect the pump.
6. According to user needs, it can be equipped with a fully automatic safety protection control cabinet to monitor water leakage, leakage, overload and overtemperature of the pump to ensure reliable and safe operation of the pump. 7.
The double-rail automatic coupling installation system brings great convenience to the installation and maintenance of the pump, and people do not have to go in and out of the sewage pit for this.
8. The float switch can automatically control the pump to stop and start according to the required water level changes, without the need for special personnel to supervise.
9. Ensure that the motor is not overloaded within the use head range.
10. According to the use occasion, the motor can adopt a water jacket type external circulation cooling system to ensure the safe operation of the electric pump in a waterless (dry) state.
11. There are two installation methods: fixed automatic coupling installation and mobile free installation, which can meet different use occasions.