5) When pumping hot or volatile liquid Inadequate suction head Elimination measures: Increase the suction head, consult the manufacturers. MechNet | More information, please visit the China Machinery Expert Network, 6) The end of the valve or inlet pipe immersion depth is not enough | MechNet | More knowledge, please visit the Chinese machinery expert network, the elimination of measures: Consult factory for the correct immersion depth, Baffle to eliminate eddy currents. 7) Damage to the pump housing gasket: Check the condition of the gasket and replace it as required. 3, the pump power consumption is too large 1) the direction of rotation is not the elimination of measures: Check the direction of rotation. 2) Impeller damage elimination measures: Check the impeller, as required to be replaced. 3) Rotating parts bite Elimination measures: Check the internal wear parts of the gap is normal. 4) Shaft bending elimination measures: Alignment shaft or according to the requirements of the replacement. 5) Too high speed Elimination measures: Check motor winding voltage or steam pressure delivered to the turbine. 6) head below the rated value. Pump too much liquid Elimination measures: consult factory. Install throttle valve, cut impeller. 7) liquid heavier than the expected value Elimination measures: Check the proportion and viscosity. 8) The stuffing box does not have the correct stuffing (insufficient stuffing, incorrect stuffing or running-in, stuffing is too tight). Remedy: Check the stuffing and refill stuffing box. 9) Bearing lubrication is not correct or bearing wear Elimination measures: Check and replace as required. 10) The running clearance between wear rings is not correct Elimination measures: Check the clearance is correct. Replace the wear rings of the pump housing and / or impeller as required. 11) pump casing stress too much Elimination measures: eliminate stress and factory representatives advice. After eliminating the stress, check the alignment.