Centrifugal pump cavitation and solve the process

phenomenon:
1 sewage pump, the use of temperature of about 80 degrees, pump pressure rose to normal after the pump outlet pump normal pressure,
About 10 minutes rapid decline in pump pressure, accompanied by noise, vibration, cavitation occurs Check the sewage station valve closed,
2 materials Pump material about 90 degrees easy to gasify the organic matter pump pressure rose to normal after the pump, due to feed a small pump outlet, the pump outlet opening is small, the pump pressure is normal,
About 30 minutes pump down, accompanied by noise vibration, cavitation occurs

This phenomenon occurs, we found that there are two situations one is the opening of the valve is not large,
The other is the pump inlet and outlet material temperature was significantly higher than the original found in two cases of cavitation occurs because the outlet valve opening is not enough or not caused when the outlet valve is not open or opening hours, the material obtained from the pump without energy Was promptly sent away,
The kinetic energy of the material is converted into heat energy, so that the material temperature increases, when reaching a certain temperature cavitation occurs in the pump body.
After analyzing the reasons for the clear solution to the pump outlet plus a return line, open the appropriate pump to open the back valve, there have been no cavitation

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