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Common problems of multistage centrifugal pump maintenance

26 Oct 2020Email

Common problems of multistage centrifugal pump maintenance

 

 

Brief description of common problems in maintenance of multistage centrifugal pumps:
1. The problem of starting with load If the multi-stage centrifugal pump has vacuum at its suction port or pressure at its exhaust port before starting, another technical parameter of the multi-stage centrifugal pump must be considered: the maximum starting load of the intake port Pis Value, the maximum starting load Pos value of the exhaust port. A typical application example is the use of a micro air pump to maintain the vacuum or positive pressure in the container. When the vacuum or positive pressure in the container is lower than the set value, the pump needs to be powered on and stopped when it is higher than the set value. Products that can be started under the limit of their own achievable multi-stage centrifugal pumps are: VM series, VAA series, PK series, PC series, VCA series, VCC series, VCH series, PH series; the maximum output that can be achieved by itself The products that start under pressure include: FM series, FAA series, PCF series high pressure air pump train. This performance has higher requirements on the manufacturer's technical level.

 


2. The reliability of multi-stage centrifugal pumps depends on the seriousness of the consequences after the failure of the multi-stage centrifugal pumps, completely according to your own requirements. The average trouble-free continuous running time of high-quality products is more than 1000 hours, and some are as high as thousands of hours. Pay special attention that this parameter is measured under full load and uninterrupted operation, which is the worst working condition. If the actual use is not full load or continuous operation, the value will be higher. How much higher depends on the working condition of the pump. set. This performance is entirely a test of the manufacturer's technical strength. Some can be seen from the appearance of the product, such as the use of special motors instead of ordinary low-priced motors, and the weight is heavier in the case of equivalent volume. According to the product price, you can also know a little bit.

 


3. The medium temperature problem of the multi-stage centrifugal pump. According to the temperature of the medium gas passing through the pump, choose the normal type or the high temperature type.
4. The electromagnetic interference problem of multi-stage centrifugal pumps If there is a precise circuit to control the multi-stage centrifugal pump, depending on the circuit's anti-interference ability, it may be necessary to order a multi-stage centrifugal pump with low electromagnetic interference.

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