| 摘要 |
There is provided a pneumatic pump (10) comprising a tubular steel frame (11) and a disc-shaped pressure vessel (12) including a lower, tangential transfer port (14) and an upper, radial ventilation port (15). A transfer assembly (16) on the port (14) includes an inlet assembly (17) having a positive-close non-return valve (21) and a delivery outlet assembly(20).A venturi assembly (22) applies suction to the ventilation port (15) and has an exhaust vent (24) including a closure assembly (25) selectively operable to cycle between a suction phase and a pressurized phase. A two way T-valve (40) selectively allows venturi exhaust air to pass selectively into either a diffuser/muffler (35) or a delivery line(42)downstream of an outlet non-return valve. |
