Rod pump must be in the direction of the established operation to produce a certain suction row.
Pump work, should pay attention to check the pressure, temperature and mechanical seal work. Shaft seal should allow a trace of leakage, such as leakage does not exceed 20-30 seconds / drop, then that normal. If the screw pump noise during work, which is often due to the oil temperature is too low, the viscosity of the oil is too high, the oil into the air, the coupling lost in the pump or excessive wear and other causes.
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