What is the reason that the acid and alkali resistant magnetic pump is spinning and not discharging water?

　　Magnetic pump can not hit the liquid is the most likely failure of the pump, and its causes are more.

　　Acid and alkali resistant magnetic pump in the turn does not produce water causes

　　First of all, you should check whether the pump suction line has air leakage, check whether the air in the suction pipe is discharged, whether the amount of liquid in the pump is sufficient, whether the suction pipe is clogged with debris, you should also check whether the pump is reversed, especially after the change of the motor or power supply line maintenance, you should also pay attention to whether the pump suction height is too high.

　　Through the above check if still can not be solved, the pump can be disassembled to check whether the pump shaft is broken, should also check the pump's dynamic ring, static ring is intact, the entire rotor can be a small amount of axial movement. If the axial movement is difficult, you can check whether the carbon bearing is too tightly combined with the pump shaft.

　　It is worth noting that the pump repair a few times to find out the problem, should pay attention to the magnetic coupling is working properly. Bearing, inner magnetic rotor and spacer will produce heat in operation, which will increase the working temperature, on the one hand, the power transferred will be reduced, on the other hand, the pump will have great trouble in conveying liquids that are easy to vaporize. The power transferred by the magnet is a continuous downward curve with the rise of temperature, usually, below the working limit temperature of the magnet, the decline of its transfer capacity is reversible, while above the limit temperature is irreversible, that is, after the magnet cools down, the loss of the transfer capacity can never be restored.

　　Special circumstances in the magnetic coupling slippage, the heat of the vortex in the spacer will grow dramatically, the temperature rises sharply, if not dealt with in time, will cause the magnet steel demagnetization, so that the magnetic coupling failure. Therefore, the magnetic pump should be designed with a reliable cooling system. For the medium that is not easy to vaporize, the cooling circulation system is generally led by the impeller outlet or pump outlet of the liquid flow, through the bearings and the magnetic drive part of the suction population back to the suction population, for the medium that is easy to vaporize, the heat exchanger should be increased or the liquid flow should be led to the pump outside of the storage tank, to avoid the heat to return to the suction population, for the solid impurities or ferromagnetic impurities of the medium, filtration should be considered, and for high-temperature media, should be considered for cooling to ensure that the magnetic coupling does not exceed the operating Limit temperature.

　　When considering whether the rotational speed is enough, we should first check whether the rotational speed of the motor itself is normal, which can be measured by tachometer, and in the case of normal rotational speed of the motor, we can consider whether the magnetic coupling will slip off.