Suction valve pressure testing device in pit

The utility model discloses a suction valve pressure testing device in pit is applicable to the suction valve's in the pit of the one -way gas injection passageway of multiunit sealing performance experiment, can verify the sealing performance of the one -way gas injection route of suction valve multiunit in the pit on ground. This pressure testing device includes pressure testing joint and ball sealer, installs the ball sealer in the gas injection route of suction valve piston bush is surveyed to the quilt, installs the endotheca at the pressure testing joint and between by survey suction valve piston bush, surveys the overcoat chucking between the suction valve piston bush at endotheca and quilt, and the endotheca is equipped with the pressure testing hole and is fed through by the gas injection route of survey suction valve piston bush. Once can test by the sealing performance of all one -way gas injection routes in the survey suction valve piston bush, labour saving and time saving has improved work efficiency greatly. The utility model discloses assemble simple and conveniently, the processing cost is low, has utilized former threaded connection of being surveyed in the suction valve piston bush, does not need in addition to have reduced the operating procedure at every gas injection route middle finishing pressure testing screw, has fine application effect.