Patent ID: 9052022
Filing Date: 2015-06-09
Classification: F16K

Abstract:
1. A bellows energized seal assembly for a rotary control valve, the bellows energized seal assembly comprising: a seal body, the seal body including a body annular flange that extends inwardly, substantially perpendicular to a longitudinal axis of the bellows energized seal assembly; a main seal axially slidable relative to the seal body; and a bellows connected to the seal body and to the main seal, the bellows both biasing the main seal towards a ball element, and providing a seal between the seal body and the main seal, wherein the seal body includes an outer body portion that extends substantially parallel to the longitudinal axis of the bellows energized seal assembly, the main seal includes an outer seal portion that extends substantially parallel to the longitudinal axis of the bellows energized seal assembly, the outer seal portion is disposed between the bellows and the outer body portion, and the body annular flange forms a stop for the outer seal portion, thereby limiting longitudinal displacement of the main seal relative to the seal body, the outer seal portion contacting the body annular flange between the bellows and the outer body portion when the main seal is located at the stop limit.