Abstract: A plate within the valve pivots about a shaft to cause the plate to transition between an open position and a closed position within a bore passing through the housing of the valve. The plate has a perimeter seal thereon which abuts against a tapering seat of the bore when the throttle plate is in a closed orientation. The seal has a curving form over a recess and an energy source, such as the toroidal spring in the recess, to energize the seal and allow it to maintain secure contact against the seat. The shaft is offset from the centerline of the bore and the plate is mounted to the shaft at a location offset from the center point of the plate, so that rotation of the plate causes the plate to swing somewhat into a closed position, minimizing abrasive contact between the seat and seal during closing.

Abstract: A Wide-body Valve Having an Internalized Actuator is disclosed. The preferred valve provides exceptional conductance while also providing a compact valve and actuator package. The valve incorporates a geometry wherein the internal diameter of the valve is approximately 180% of the diameter of the valve's port. Furthermore, the stroke of the valve is preferably 30% or more of port diameter. Also, the valve actuator housing is designed to cooperate with the valve body housing such that the actuator housing is encapsulated within the valve body housing such that the valve part count and valve part volume is reduced over conventional valves.