Exhaust valve i.e. return valve, for common-rail-high pressure pump utilized in common-rail-fuel injection system, has valve element comprising casing and ball that is connected with casing in fixed manner and guided indirectly over casing

摘要

The valve has a valve element (2) guided in an outlet port in a displaceable manner and comprising a cap-shaped sealing surface (4) acting together with a valve seat (3). The valve element is axially-prestressed against the valve seat by spring force of a pressure spring (5). The valve element has a casing guided in an inner side of the outlet port in a displaceable manner and a ball that is formed as a closing body. The ball is connected with the casing in a fixed manner and guided indirectly over the casing. A ring-shaped outlet for supporting the spring is formed in the casing.