Abstract: A frost proof sillcock having an outer section with a fluid chamber therein and a discharge opening, a round tubular body connected to the external section and communicating with the chamber, and a seat end section of substantially the same diameter as the tubular body connected integrally with the body to form a substantially even external surface between the body and the section. The seat end section contains a valve seat and a plurality of thread segments, and a stem extends through the chamber in the external section and through the body, and contains a valve element on the inner end thereof for seating on the seat. A hand wheel for rotating the stem to seat and unseat the valve element is secured to the outer end of the stem.

Abstract: An annular, rigid reinforcement ring embedded in a body of molded elastomeric material forms a valve seat for a butterfly valve. The seat has a pair of diametrically aligned shaft openings for the valve disc supporting and actuating shaft. These holes extend through the elastomeric material and the reinforcement ring and, during molding of the elastomeric material, are occupied by removable cores which center the reinforcement ring about the cores between the end faces of the mold and position it concentrically between the inner and outer circumferential walls of the mold cavity. To prevent the reinforcement ring from rotating about the cores and to center it positively between the end faces of the mold, a pair of support extensions are provided aligned axially of the ring. One support extension protrudes from each edge or end face of the reinforcement ring. The pair of support extensions maintains proper alignment of the reinforcement ring with the end faces of the mold.

Abstract: A valve seat for a butterfly valve having an annular, rigid reinforcement ring embedded in a body of molded elastomeric material. The seat has a pair of diametrically aligned shaft openings for the valve disc supporting and actuating shaft. These holes extend through the elastomeric material and the reinforcement ring and, during molding of the elastomeric material, are occupied by removable cores which center the reinforcement ring about the cores between the end faces of the mold and position it concentrically between the inner and outer circumferential walls of the mold cavity. To prevent the reinforcement ring from rotating about the cores and to center it positively between the end faces of the mold, a pair of aligned pins are provided, one in each of the mold end faces, which clamp the reinforcement ring between them. These pins are located circumferentially along the reinforcement ring approximately halfway between the cores.