| 摘要 |
The invention relates to an arrangement related to valves, in particular valves which are being utilised for aggressive, viscous substances. The object of the invention is to provide a device eliminating the damages to the gaskets and seals incorporated into the valve, which are being caused by the viscous substances with aggressive components passing through the valve. The device according to the invention is intended for being utilised in such valves, which consist of a housing 1 with an inlet 2 for the viscous substance, an outlet nozzle 3 and a piston mechanism 4, 5, 8, 9, 10 for opening and closing the nozzle. The valve according to the invention is characterised by a combination of a diaphragm 15 separating said piston mechanism 4, 5, 8, 9, 10 from the viscous substance and a viscous filling agent 20, preferably grease, which fills a cavity 19 between the diaphragm and the piston mechanism. <IMAGE> |
