Magnetic pump common problem analysis and safe operation rules

Common problems of magnetic pump analysis: 1 magnetic pump due to cavitation problems: cavitation pump pump main reasons are large inlet resistance, medium more gas transmission, filling pump is not enough, the pump inlet can not enough the reason. Cavitation is the most damaging to the pump. The pump vibrates violently when cavitation occurs. The serious balance will destroy the pump bearing, rotor or impeller. This is a common cause of magnetic pump failure. 2 isolation sleeve damage: magnetic pump magnetic coupling pump is transported by the cooling medium, if the media has hard particles, it is easy to cause the isolation sleeve scratched or scratched, and sometimes if the maintenance of improper methods may also cause isolation Set of damage. 3. No medium or medium flow is small: the rotor shaft and the stability of the dry friction bearings, burning bearings. Magnetic pump is provided by the transmission medium to the sliding bearing lubrication and cooling, without opening the valve or outlet valve in the case of sliding bearing lubrication and cooling without the transmission medium caused by high temperature and thus damaged. Magnetic pump safety procedures: 1. Preparation before starting: a clean equipment and operating personnel around the safety of debris. b check the seal water tank is working within the normal working level, insufficient should be added. c Check all valves in the sealed water line to be properly opened and closed. d When driving for the first time after a long-term shutdown or overhaul, remove the fan cover of the motor and turn it manually. Check if the magnetic pump rotates freely and install the fan cover after confirming that there is no problem. e Open the pump inlet valve and close the pump outlet valve. f Notify the electrician to send the electricity to the field operation panel. 2. Startup: a Start the pump and check the sound and vibration of the pump. b Open the pump outlet valve without any abnormalities. 3. Stop normally Close the outlet valve, then stop the motor immediately, then close the inlet valve again. 4. Emergency stop immediately stop the motor, and then close the outlet valve and inlet valve.

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