| 摘要 |
In a pneumatically or hydraulically actuated valve, in particular, a diaphragm valve, that comprises a valve body that can be actuated via a coupling rod (14), the coupling rod (14) is held in the corresponding position for adjusting a minimum flow cross section via an adjustable limit stop. The coupling rod (14) passes through the housing cover (12) of a valve housing (10) and serves as an indicator for the valve position. The coupling rod (14) is guided in a sliding fashion inside a sleeve (16), with said sleeve (16) engaging with a threaded bushing (20) that is connected with the housing cover (12) in a fixed manner via an external thread (18), and with said sleeve being able to be displaced in its axial direction (z) by means of a screw-turning motion. A limit stop part (22) that can be brought into contact with the face side (26) of the sleeve (16) situated opposite the valve body is fixed on the free end of the coupling rod (14). The limit stop part (22) is preferably fixed on the coupling rod (14) such that its position can be adjusted. Due to the possibility of adjusting the sleeve (16) as well as the limit stop part (22) on the coupling rod (14), it is possible to adjust the open as well as the closed actuating position of the valve and actuate the valve between a preadjusted minimum and a preadjusted maximum flow cross section.
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