Valve device for high-pressure liquid dispenser has control channel connected upstream of blocking valve to inlet-side branch for fluid

摘要

The valve device (1), e.g. in a valve pistol (3) or a high-pressure cleaning device (4), includes a control channel which is connected to the inlet-side branch for the fluid (2) upstream of the blocking valve (6), so as to provide pre-tension for the piston in the opening direction of the valve body, and/or to reduce the force required to open the blocking valve. The valve may also have a means of delaying or damping the closing of the valve.