A DEVICE OF A CLOSABLE FLUID FLOW VALVE, SPECIAL USE OF THE VALVE AND A METHOD ASSOCIATED WITH THE CLOSING AND OPENING OF THE VALVE

摘要

A fluid flow valve is constructed as a shut-off/opening valve, but may also be used as a modulating valve. In a tubular valve housing (10a-10d) there is mounted a seat (20) in the form of a hollow, conical body that tapers off in a direction against the direction (28) of fluid flow. The seat body (20) has at least two flow orifices (24), the axes of which deviate from the direction of the straight longitudinal axis of the valve and terminate at the outside surface of the conical seat body. A sleeve-shaped reciprocating valve body (26) has, at its end portion closest to the seat (20), an essentially complementary conical recess in which are formed abutment surfaces (26a) for sealing, abutting contact, face against face, against corresponding abutment surfaces (20c') around each flow orifice (24). Through the internal surfaces of the valve body following a conical/inclined course relative to the longitudinal axis (12) of the valve, these inside surfaces will be able to cover large flow orifices (24) in the seat (20) without using a large wall thickness for the sleeve by the valve body (26). On the contrary, this wall thickness may be reduced and the bore diameter increased, while the pull can be reduced.