VALVE WITH TEMPERATURE CONTROLLED SEALING CONTACT

摘要

A valve for controlling the flow of fluids containing abrasive particles including thermally-actuated means for ensuring a tight seal between the movable valve element and the valve body in both the open and closed positions. The thermally-actuated means is deactivated when repositioning the movable valve element and reactivated to provide a tight seal when the movable valve element is in position.