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[Chemical Knowledge]：Harm of reverse rotation of centrifugal pump and its preventive measures

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As an indispensable equipment in industrial production, the centrifugal pump is mainly used to transport liquid or gas to the designated place through the rotating force. However, in the process of using the centrifugal pump, the reverse of the centrifugal pump sometimes occurs, which causes great harm in industrial production.

the hazards of centrifugal pump reversal:

1. Increase the degree of wear of the pump

the reverse of the centrifugal pump will cause the reverse flow of liquid into the pump body, which will increase the friction between the impeller and the pump body, thereby increasing the pump The degree of wear shortens the service life of the pump.

2. Reduce the efficiency of the pump

the reverse of the centrifugal pump will affect the normal operation of the pump, making the angle of the liquid entering the pump body become irregular, resulting in unstable liquid flow, thereby further reducing the efficiency of the pump.

3. Destruction of the pump impeller

centrifugal pump reversal, the pump impeller will be subjected to different directions of the liquid impact, resulting in the pump impeller force imbalance, and then lose balance, resulting in impeller damage.

4. explosion hazard

centrifugal pump reversal, the liquid flow direction and the pump body pressure direction are reversed, may make the pressure in the pump exceeds the bearing limit, resulting in the pump or its nearby explosion.

centrifugal pump reversal precautions:

1. Regular inspection and maintenance of

Regular inspection and maintenance of centrifugal pump, timely detection and resolution of problems, including checking the circuit for problems, temperature, vibration and sound, etc. Whether the liquid is clean, to prevent foreign matter into the pump, pump shaft and seals, etc.

2. Install the valve

to set the valve at the pump inlet and outlet, and maintain the direction of the valve opening.

3. Install the reverse flow valve

the outlet pipe of the centrifugal pump to install the reverse flow valve to prevent the reverse liquid from entering the pump body and forming a reverse flow.

4. Correct selection of pump

Correct selection of centrifugal pump, according to the specific use of the appropriate pump type and specifications, to avoid reversal in the course of use.

centrifugal pump reversal in industrial production will appear a lot of harm, but it is not difficult to prevent and solve, as long as more do maintenance and correct selection of pumps and set the valve can prevent the occurrence of reversal, to ensure the safety of industrial production.