Valve with presetting of the amount of throughflow

Claim 1

A thermostatic valve assembly, comprising, a housing having inlet and outlet connections and a valve controlled opening having a valve seat therebetween, said housing defining a cylindrically shaped valve chamber on one side of and coaxially aligned with said opening, said valve chamber having a cylindrically shaped wall with an ingress aperture providing fluid communication between said inlet connection and said valve chamber, said housing forming a base section for said valve chamber in surrounding relation to said valve seat, a valve closure member in said valve chamber cooperable with said valve seat, an adjustable throttle member rotatably mounted in said valve chamber in surrounding relation to said valve closure member, said throttle member having a spiral wall extending spirally relative to the axis of said valve seat which forms a variable throttle passage with said valve chamber cylindrically shaped wall and which enlarges and contracts relative to said ingress aperture when said throttle member is selectively rotated in opposite directions to form an adjustable cross section throttle passage, said spiral wall having an axial end thereof in sliding and sealing engagement with said base section in surrounding relation to said valve seat, said spiral wall being circumferentially discontinous to form a circumferential opening which forms a through passage providing fluid communication between said throttle passage and said valve controlled opening, and setting means for rotating said throttle member to provide varying desired throttling conditions between said ingress aperture and said valve controlled opening.