Why self-priming sewage pump’s motor is hot?

In the process of self-priming sewage pump,if motor is too hot will cause tripping and stopping. The main reasons are as following:
 1. Ultra-current, actual head reach, fluid overload, causing the motor load. Solution: install valve in the pump outlet, the valve off a small reduction in traffic.
 2. Soaking of motor lead wet; solution: drying damp motor.
 3. The supporting motor power is small; Solution: Adjust support, replace the motor.

So it is important to maintain self-priming sewage pump.

(Source:http://www.forever-pump.com/why-self-priming-sewage-pumps-motor-is-hot/)

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