| 摘要 |
The flap acts as seal with a piston moving backwards and forwards and producing pressure and suction pressure which are converted into pressure and suction forces, in order to pump fluids from suction to pressure by stopping or permitting the suction and pressure fluid flows. The flap is fitted in a piston/plunger pump with a spring plate (2) pushed over the flap member (1) with the spring (3), the flap weeight (4) and the flap (5), after which the valve member with the screw end in the flap seat (7) is screwed or threaded into position. The valve flap can also be made entirely of nitril rubber.
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