Mechanical seal flush method does not include ( ).

A mechanical seal is a unit of ( ).

The main function of the mechanical seal is to prevent high pressure liquids from moving from the pump inside out and from ( ) entering the pump.

( ) in mechanical seals are prone to wear.

For short shafts with low speed and high rigidity, the coupling commonly chosen is ( ).

The function of the coupling is to connect ( ) to the pump shaft, to pass the mechanical energy of the motor to the pump shaft, so that the pump gets energy.

The following that will not cause the machine pump to vibrate are ( ).

When the load has impact, vibration, and the shaft speed is high, the stiffness is relatively small, generally choose ( ).

Centrifugal pump selection flow should be selected according to ( ).

The flow rate of the centrifugal pump is proportional to ( ).

The theoretical head of the centrifugal pump is related to the diameter of the impeller.

The smaller the viscosity of the liquid, the shaft power ( ) of the centrifugal pump is required, and the lower the temperature generated by friction with the impeller.

After the hot oil pump is out of service, the cooling water should generally be completely closed until the pump body temperature ( ).

In general, the temperature of the conveying medium of the machine pump ( ) when the pump support needs to be cooled.

Under normal circumstances, the sealing chamber needs to be cooled when the temperature of the conveying medium ( ) of the pump.