The stem guide limits the rotation of the valve stem between the open and closed positions. The annular spring means maintains an upward thrust on the valve stem so that a flange on the bottom of the valve stem compresses the primary seal washer against the top of the bottom recess and ...
15. The valve of claim 14 wherein said circumferential flange recess is formed along an outer perimeter of said flange; and wherein said flange seal has an axial dimension greater than an axial dimension of said recess so that said flange seal is axially compressed when the valve is assembled...
A ball valve having a ball-style closure member that is trunnion mounted in a valve body includes a stem seal and two backup rings that are axially disposed on the stem adjacent the seal. One of the backup rings includes a tapered face that seats against a tapered shoulder of the stem so...
Dervos Valves is a professional industrial valve manufacturers,specializes in electric and manual valves,including ball valves,gate valves,butterfly valves,check valves and other special pipe valves,also offer best purchasing suggest.
1、第二章第二章 球阀(Ball Valve)球阀图所示管线线路截断球阀.其所以采用全通径球阀,主要系满足清管时PIG的畅通无阻. 球阀的用途球阀的用途 依结构分 依球径分 依设计分 依密封原理分球阀的种类球阀的种类老式的Cameron球阀有一个特别设计就是旋转式密封座结构。当阀体被旋转到关闭的位置,与球体两侧相连接的“...
Unique packing system. Self adjusting with permanent loading (Stainless steel Belleville springs). PTFE CHEVRON packing provides stem seal integrity while maintaining low turning torque. Minimum valve body cavity space reduces potential product accumulation and contamination problems ...
valvevacum高真空总代理valvesstem DescriptionA&Nballvalvesconsisto abody,stem,ball,andtwoendcapsmachined romcorrosiveresistant316Lstainlesssteel.Fluoroelasto-mersareusedtosealthestemandendcaps romatmospherewhilethePTFETe on®seatscold owaroundtheballtoisolatetheprocesswhenclosed.Thevalveisopenedandclosedmanually...
Industrial Gate Valve Stainless Carbon Steel Metal Seated Seat Seal Rising Stem or Non Rising Stem Flanged Industrial Gate Valve with Prices Gate Valve Drawing US$12.00 / Piece 100 Pieces (MOQ) Contact Now ASTM A216 Wcb Carbon Steel Stainless Steel Gate Valve ANSI Class 150lb A216 Wcb Carbon ...
API 6D Fully Welded Trunnion Mounted Ball Valve Features: Material: Body: ST37.0/A106/Steel 20 Ball: SS304 Stem: 2Cr13 Stem seal: FPM or VITON Ball seal: RPTFE (PTFE+C) *The stem height and face to face dimension according to client's...
Pressure Seal Bonnet Gate Valve BW 8 Inch 2500LB Duplex SS Check Valve Lug Type Dual Plate 8 Inch Class 150 Forged Steel Globe Valve 1 Inch 800LB Threaded Manual Extended Stem Cryogenic Ball Valve LF2 1500LB BW Double Offset High Performance Butterfly Valve CF8M 3 Inch Company...