Hot water valve

Abstract

A valve comprising a body having a chamber therein, fluid inlet and outlet ports in communication with the chamber, an opening for a valve plunger, and a nipple extending into the chamber having a passage constituting one of said ports. A valve plunger extends through the opening in the body and is movable toward and away from the nipple, the plunger comprising a generally conical valve member at its end toward the nipple in axial alignment with the passage in the nipple. A sleeve of resilient material of generally circular section is secured to the nipple and has a portion extending beyond the end of the nipple. The inner surface of the extending portion of the sleeve at the free end thereof is countersunk thereby forming a frustoconical valve seat. The angle of the seat relative to the axis of the sleeve is at least as great as the angle of the conical valve member relative to the axis of the sleeve, and the valve member, on entry into the sleeve, thereby engages the inner end of the seat and, on continued movement in the direction toward the nipple, expands the extending portion of the sleeve and sealingly engages the seat, the valve member, in moving into the sleeve, wiping the seat to remove scale which may have deposited on the seat and on the portion of the valve member engageable with the seat.