after the demolition of the stage bulb coated with a lubricant in the joints
time2012/02/26
after the demolition ofthe stagebulbcoated with alubricantin the jointsorblendingpaint,and tighten the screws.the stagebulbsbecause oftheair orthe inletgas accumulation, ortheend of the valvein the pump bodylaxofftheirrigation waterdiscontent,seriousleakofthevacuum pumppacking,gate ordoorclosed lax.the stagebulbsRemedy: First thewater pressureup, and thenpumpfilled with water, and thenbootthe stagebulbs Also checkthe check valveistight,piping, fittingsorwithoutair leaks,andfoundtheleak.