FIELD: machine engineering.
SUBSTANCE: valve assembly comprises a first piston element disposed to be displaceable within the first chamber. The second piston element is connected to a valve closure element, such as a diaphragm, and the second piston element is disposed within the second chamber. Longitudinal offset of the first element of the piston relative to the first camera forces the working fluid, located inside the first camera, slipping in the longitudinal direction of the second piston element so that the valve closing element interacts with the valve seat valve closing the site. Area of the second piston element more than the area of the first piston element to multiply force established operating mechanism that moves the valve stem, which is connected to the first element of the piston. It is also described how to control valve closing.
EFFECT: increase of durability of a hydraulic mechanism for valves, improved sealing characteristics of membrane, simplifying the valve service.
20 cl, 5 dwg
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