Abstract A valve which may be actuated automatically or by hand has a closure member located on the high-pressure side and opening against the direction of flow. A spring carried by the valve spindle is used to open the closure member. The tension of the spring may be varied by a threaded bush serving as a spring support and helically movable in the valve casing. The valve is particularly characterized in that the valve spindle carries the spring-engaged closure member with axial play which is freely suspended therefrom. The spindle carries a turn lock which can be released. A driver connection operable only in direction of rotation is provided between a spring support mounted in the valve casing and helically adjustable relatively thereto and the valve spindle. Thus when the turn lock is released, the spring support can be adjusted by turning the valve spindle.
A valve comprising a casing having an inlet joint and an outlet joint, a closure member for separating the inlet from the outlet, a valve spindle having a lower end, said closure member being suspended with play from said lower end, and openable lock engaging said valve spindle to prevent it from rotating, a spring support enclosing said spindle and having outer threads meshing with inner threads formed in said casing, and a sprinG engaging said spring support and said closure member, said spring support having an inner elongated groove, said spindle having a projection extending into said groove.
Claim 2
Dependent Claim
99 words
A valve comprising a casing having an inlet joint and an outlet joint, a closure member for separating the inlet from the outlet, a valve spindle having a lower end, said closure member being suspended with play from said lower end, and openable lock engaging said valve spindle to prevent it from rotating, a spring support enclosing said spindle and having outer threads meshing with inner threads formed in said casing, and a sprinG engaging said spring support and said closure member, said spring support having an inner elongated groove, said spindle having a projection extending into said groove.
Claim 3
Dependent Claim
27 words
A valve in accordance with claim 1, wherein said lock comprises two tensioning jaws carried by said casing and engaging said spindle, and screws engaging said jaws.
Claim 4
Dependent Claim
27 words
A valve in accordance with claim 1, wherein said spindle has an upper end extending out of the casing and having the shape of a tool-receiving handle.
Claim 5
Dependent Claim
27 words
A valve in accordance with claim 1, comprising a valve seat sleeve enclosing said closure member, said closure member having a shaft portion slidable in said sleeve.