Submersible reflux pump QJB-W2.5/8 in the mud pit

Scope of applicationSubmersible reflux pump QJB-W2.5/8 in the mud pit

The submersible sludge reflux pump can operate normally and continuously under the following conditions
1. Altitude not exceeding 1000m;
2. Resistant to high medium temperatures not exceeding 40OC;
The pH value of the medium is between 5-9;
4. The liquid density shall not exceed 1150kg/m3;
5. Long term diving operation, with a diving depth generally not exceeding 20m;

1. Equipment name: Submersible sludge reflux pump
2. Equipment model: QHB2.5/8
3. Main technical parameters

Usage conditions:
1. During continuous operation, the medium temperature shall not exceed 40 ℃;
2. The pH value of the medium is 6-9.
3. The maximum submergence depth is 10m.


Construction and Working Principle: Submersible Backflow Pump QJB-W2.5/8, Keppel
The submersible sludge reflux pump consists of an impeller, submersible motor, guide cover, through wall pipe, flap door, installation of lifting guide rod, lifting steel rope, underwater cable, lifting bracket and hand-operated lifting device, angle steering device, local control cabinet, etc.
The submersible sludge reflux pump can rotate and balance freely without any jamming, stagnation, vibration, or other phenomena;
Conduct a sealing pressure experiment on a submersible sludge reflux pump with a pressure of 0.3 MPa for 5 minutes without any leakage;
4. Adopting a dual mechanical seal structure and a lip seal to form a dynamic sealing system, the mechanical seal ensures reliable operation within 25000 hours without the need for replacement;
5. It can work continuously under the conditions of full immersion and submerged motor exposed to the liquid surface, while ensuring that it can still operate normally once turned on, even in the case of intermittent operation and long-term shutdown.
6. The outgoing cable adopts YZW type rubber sheathed flexible cable in GB5013.2 or other cables with the same performance. The standard configuration length for a single unit is 10m. The cable sealing head is treated with special vulcanization to prevent damage to the cable sheath and water leakage to the motor;
Its surface is bright and free from stains, bumps, cracks, and other phenomena;
There is sufficient space in the oil chamber to accommodate expansion caused by temperature differences, and a sealed leakage protection device is installed;
The two-color wire (yellow/green) in the 9-out cable is designated as the grounding wire, and the connection is reliable. The grounding sign is obvious and not easily erased during the service life;
10 impellers and rotors undergo dynamic balancing tests, with a balancing accuracy of G6.3;
There are thermal protection switches installed inside the stator winding and at the positions of the upper and lower bearings, and a sealed leakage protection device is installed inside the stator cavity.
Installing guide rods can ensure the free rotation, lifting, and adjustment of various angles of the equipment, and there is no need to empty the pool when lifting and installing the mixer.