Patent ID: 6637452
Filing Date: 2003-10-28
Classification: F16K,Y10T

Abstract:
A valve comprising:a cage defining a bore extending along an axis, a plug sized to fit inside the bore and adapted for slidable movement along the bore axis between closed and throttle positions, the plug comprising a proximal end connected to a stem and a distal end, the plug further comprising a seat disposed between the proximal and distal ends thereof, a seal ring disposed between the distal end of the plug and the cage when the plug is in the closed position, the seal ring comprising a seating surface for engaging the seat of the plug when the plug is in the closed position the plug further comprising a wiper seal disposed between the seat and distal end thereof, the wiper seal comprising an outside surface adapted to engage the bore and the seating surface of the sealing ring as the plug is moved between the closed and throttle positions.