Abstract: A valve assembly includes a valve and a gearbox. The valve includes a valve body having a drive opening and a mounting surface adjacent the drive opening. At least one mounting bore is formed in the mounting surface. At least one rigid pin is fixed to and projects from the mounting surface. A rotatable valve member is disposed in the valve body. A gearbox is operable to rotate the valve member through the drive opening. The gearbox includes a casing including a mounting wall positioned adjacent the mounting surface of the valve body. At least one mounting hole is formed in the mounting wall and is disposed adjacent the mounting bore. At least one pin hole is formed in the mounting wall and receives the pin. A drive hole is formed in the mounting wall and communicates with the drive opening. At least one fastener extends through the mounting hole and engages the mounting bore to secure the casing to the mounting surface. The pin resists relative rotational movement of the casing and the valve body.

Abstract: A method of producing a valve includes the steps of: providing a mold comprising a pair of mating mold halves, with each of the mold halves including a mold cavity; providing a valve member-stem unit comprising a valve member of substantially circular cross-section attached to a stem, with the valve member including a passageway extending therethrough in a direction generally normal to the stem; inserting a mold core into the passageway of the valve member-stem unit to form a mold insert assembly; positioning the mold insert assembly within the cavity of a first of the mold halves; positioning a second of the mold halves in adjacent contacting relationship with the first mold half such that the mold insert assembly is located within the mold cavities of the first and second mold halves; injecting a polymeric material into the mold half cavities such that a valve casing forms around and captures the valve member-stem unit; and removing the valve casing, the valve member-stem unit and the mold core from the mol

Abstract: A valve includes a valve body defining a cavity and including a flange having an outer surface and a first element. The first element includes at least one of a recess defined in the outer surface of the flange and a projection extending from the outer surface of the flange. A seat retainer is mounted on the flange and has an inner surface. The seat retainer includes a second element including at least one of a recess defined in the inner surface of the seat retainer and a projection extending from the inner surface of the seat retainer. A valve seat is retained on the flange by the seat retainer. The seat retainer is secured to the flange by a cooperative snap fit engagement between the first and second elements. A valve member may be rotatably mounted in the cavity and engage the valve seat.

Abstract: A dual isolation valve comprises: a valve body with opposed inlet and outlet ports that defines an inner cavity; a first valve member; and a second valve member. The first valve member (preferably a plug) has a narrower first end and a wider second end and is rotatably mounted within the valve body cavity for rotation about a first axis of rotation substantially perpendicular to the flow axis defined by the inlet and outlet ports. The first valve member includes a substantially rectangular flow passage.

Abstract: A dual isolation valve comprises: a valve body with opposed inlet and outlet ports that defines an inner cavity; a first valve member; and a second valve member. The first valve member (preferably a plug) has a narrower first end and a wider second end and is rotatably mounted within the valve body cavity for rotation about a first axis of rotation substantially perpendicular to the flow axis defined by the inlet and outlet ports. The first valve member includes a substantially rectangular flow passage.