Valve

摘要

An exhaust control valve /110) comprising a valve body (116) defining a fluid flow path through the exhaust control valve (110). A valve member (118) for controlling fluid flow rate along the fluid flow path is rotatably connected to the valve body (116). A drive member (120) extends into in the valve body (116) and is provided for moving the valve member (118)relative to the valve body (116). A mechanical seal (132) is provided for limiting fluid leakage from the fluid flow path out of the valve body (116) along a clearance gap adjacent the drive member (120).