| 摘要 |
A leakage free bushing for placement through a surface of a fitting body. The leakage free bushing has flexible bellows, a moveable sealing element and a stationary sealing seat. The flexible bellows have one end connected to the fitting body in a leakage free manner while its other end is capable of an angular tilt movement with respect to the vertical axis of the flexible bellows. The moveable end of the flexible bellows are covered in order to prevent leakage. The flexible bellows have an actuating knob connected to its outer area which, when rotated, permits mechanical deflection of the bellows. In the inner area of the fitting body at the left of the bellows axis, a transmission assembly is located which transmits the mechanical deflection caused by the actuating knob to the inner space of the fitting body.
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