1. Pump pressure and vacuum gauge readings should be in accordance with the pump specified by the technical specifications. 2. Pay attention to the working condition of packing seal. If oil spill occurs, adjust it according to the degree of packing cap. (It is not allowed to tighten the packing cap pressure so as to avoid the heat of packing and rapid wear of packing ring). 3. When the pump is in operation with abnormal noise or temperature rise is too high, should immediately stop the pump operation, check. Pump work stop 1. Cut off the power. 2. Close the inlet pipe valve.