One, the stainless steel centrifugal pump cavitation phenomenon Stainless steel centrifugal pump cavitation phenomenon refers to the transported fluid because of the transportation temperature of saturated vapor pressure is equal to or lower than the entrance of the pump (actually the inlet pressure and partial vaporization ), cause the pump to produce noise and vibration, serious when, the pump flow, pressure head and efficiency significantly, apparently, cavitation erosion stainless steel centrifugal pump in normal operation not permitted to happen. To avoid cavitation phenomenon is the key to the pump mounting height should correctly, especially when transporting high temperature of the volatile liquid, more attention should be paid. Two, stainless steel centrifugal pump mounting height Hg Allowable suction vacuum Hs refers to the entrance of the pump pressure P1 may allow to achieve the maximum vacuum level and the actual allowable suction vacuum value of Hs and not according to the calculation value, but by the pump manufacturers measured value, this value is attached to the pump for users to search sample. One should pay attention to the pump is given in the Hs sample value is to use water as the working medium, operating conditions of 20 ℃and pressure of 1.013× 105Pa value, when the operating conditions and working medium is not at the same time, need for conversion.