GATE VALVE

摘要

pipe line fittings; shutting-off pipe lines carrying highly paraffinaceous and highly resinous oils. SUBSTANCE: gate valve includes body, gate control unit and flexible seal which is mounted independently in bottom portion of body filling up all free space; seal is provided with elastic thin-walled envelope filled with compressible medium, air for example of elastic gel formed from plasticized polymer. Flexible properties are imparted by compressible medium. EFFECT: enhanced operational reliability of gate valve in oil line. 4 dwg