Product feature:
1. WQ series of bottom suction submersible sewage pump is composed of submersible three-phase asynchronous motor and sewage pump. Electric motor is connected with pump directly. There is reliable mechanic seal device between them, which can prevent exchanging of cooling liquid in motor cavity and pumped medium. So that pump can be reliable running for long time.
2. Electric motor winding is anti-water polyethylene electromagnetic wire with nylon sheath. Motor cavity or sealing cavity is filled of NO.10 machine oil or NO.25 transformer oil (when pump is placed by vertical, oil submerges the upper bearing will be ok.) Electric motor is adopted radial ball bearing, which is very easy to dismantle and maintain.
3. Pump is non-blocking model, so its passage ability of solid material and other impurity is very good.
4. There is cooling cover of motor casing, so motor can work above the water in some time; if pump structure is adopted built-in type, liquid will be discharged through electric motor, so electric motor can work above water for long time.
5. There is pop-off valve on the upper cover, which is to prevent motor cover burst because of too big pressure in motor cavity.
6. Small flow pump is centrifugal or spiral-flow type of structure, which is suitable for pumping ordinary sewage; big flow pump is double flow and non-clocking structure or mixed-flow structure, which is suitable for sewage circulation of coal washery, pumping slurry and river water irrigation, etc.
