Bellows seal valve

Claim 1

In a bellows valve having: a valve body with a fluid cavity including a control port coupling an inlet port to an outlet port; a valve bonnet attached to said valve body at one end and having a control member mounting means at its opposite end; a stem receiving aperture in said bonnet; a valve stem mounted in said stem receiving aperture for axial movement towards and away from the control port; a gland coupled to said bonnet having a non-round aperture thereby engaging a complimentary portion of said stem; a port closing means positioned on one end of said stem and within said cavity; a control member attached to the opposite end of said stem and threadably coupled to said mounting means; the improvement comprising said stem receiving aperture having an enlarged portion at said one end of said bonnet forming a bellows receiving recess; an elongated metallic bellows; a ring attached at said one end of said stem; one end of said bellows extending into said recess; a hollow sleeve positioned within said recess and attached to the side walls of said recess; a radially inward extending flange on said sleeve; said one end of said bellows terminating in a generally circular cylindrical portion; said flange having a complimentary circular cylindrical portion welded to said cylindrical portion of said bellows; and the opposite end of said bellows welded to said ring.