If you use progressive cavity pumps Sydney for your application, you might experience problems with your pumps, especially if you are using your pump for the wrong application, using a pump that is too small or too big for your application, using an old pump, and so on. We will walk you through some of the most common causes of pump failure and how to troubleshoot the problem.
The pump does not start
If your pump doesn’t start, some of the possible causes include blockage, rotor and stator adhesion, excess pressure on the outlet, fluid temperature, solid size, frozen liquid, sedimentation or crystallization, stator incompatible with fluid, viscosity is too high, inverter settings and gland packing
If the culprit is the rotor and stator adhesion, you should lubricate the stator and rotor with inert oil or glycerin. For excess pressure on the outlet, you should increase the size of your pump or the motor size. You should also change the piping configuration to reduce pressure on the outlet.
If the problem is caused by a blockage, then you should open the inspection port to remove any solids that could be blocking the pump. If this is not possible, you should disassemble the whole pump and clean it. For fluid temperatures, you should perform clearances between the stator and the rotor.
In case the solid size is too large for your progressive cavity pumps, you should reduce the speed of the pump or install a filter on suction. For crystallization or sedimentation, you should flush the pump, disassemble it and thoroughly clean the pump. When the fluid is frozen, it means that the temperature is too low. You should ensure that the pump is protected and drain when not in use. After draining, you should install trace heating.
If the stator is incompatible with fluid, you should check for chemical compatibility. For incorrect pump speed, you should check the speed of the pump and verify frequency, power absorbed, rpm and voltage. Always check for the original pump specification when pumping liquid with high viscosity.
Pump not creating suction
Some of the most common causes of this problem include blockage, fluid temperature, solid size, air ingress, sedimentation or crystallization, frozen fluid, suction head too high, high pump speed, low pump speed, the direction of rotation, NPSH, stator worn, dry running, high viscosity, rotor worn, gland packing and so on.
If the suction head is too high, you should check the inlet filter, inlet pressure, and the suction line to ensure it is fully open. You should also check the direction of rotation to ensure it is in line with the arrow on the nameplate. For dry running, you should install a dry protection probe.
Incorrect flow rate
Causes of incomplete flow rates include blockages, excess pressure on outlet, air ingress, air pockets, suction head too high, low pump speed, stator worn, rotor worn, transmission broken or faulty and incorrect pump speed. Use the above method to troubleshoot the incorrect flow rate of your progressive cavity pumps Sydney. If the rotor and stator are worn, replace them accordingly.
