概述；NKJ61H真空截止阀主要结构特点及用途1、NKJ61H真空截止阀主体采用铸锻结构，具有平行双密封副半强制双向密封，密封面到位运动和楔形块楔紧运动分步作用实现零泄漏。2、NKJ61H真空截止阀密封面运动磨擦力小、启闭轻便，而且密封面磨损有自动补偿功能。3、NKJ61H真空截止阀结构简单、紧凑、检修方便，使用寿命长。4、NKJ61H真空截止阀阀盖填料室设有真空密封结构，具有自胀压紧作用，并且密封采用高强膨胀材料密封，使系统与大气完全隔离，具有很好的系统气密性。5、NKJ61H真空截止阀连接形式分法兰、焊接两种，驱动方式有手动、电动两种。该阀门适用于工作温度≤425℃和≤550℃，工作介质为水、蒸汽或空气的管路上，作为启闭装置；尤其适用于火电厂汽机冷凝和真空负压系统，起真空隔离密封作用。阀门结构型式ValvectrucuretypeNKJ61H真空截止阀；NKJ61H真空截止阀主要性能规范产品类型Producttype壳体强度试验/MPaShelistrangthtest上密封试验/MPaBacksealtest密封试验/MPaSealtest适用介质Applicablemedium适用温度/℃ApplicabletemperatureNKJ61H-406.O4.44.4水、蒸汽、空气Water、Steam、Air≤425NKJ61H-64967.O7.ONKJ61H-10015.O11.011.ONKJ61Y-40l6.O4.44.4水、蒸汽、空气Water、Steam、Air≤550NKJ61Y-64l9.67.07.ONKJ61Y-1OOI15.O11.O11.O·NKJ61H真空截止阀主要零件材料MaterialforMainParts零件名称Partname阀体、阀盖BodyBonnet阀杆ValveStem阀瓣Disc密封面Sealingface阀杆螺母Yokenut填料Packing紧固件FasteherNKJ61H-C型25或WCB铬不锈钢Crstainmlessteel铬不锈钢CrstainmlesssteelH：合金钢H：alloysteel铝青铜AIbronze膨胀复合石墨Expandingcompoundgraphlte优质碳钢High-gradecarbonsteelNKJ61Y-l型铬钼钢Cr.Mosteel20CrlM01vA或38CrMoAlA12CrlMo1VAY：硬质合金Y:oarbidealloy铬钼钢Cr.Mosteel·NKJ61H真空截止阀·主要尺寸及重量Maindimensionsandweight公称通径DN/mmNominaldiameter公称压力PN/MPaNominalpressure主要外形尺寸和连接尺寸/mmMainextemalandconnectingdmensionsLHDD0D1L1αW1O4.0130245361118.41O-12015130245361622.51O-12020150265442128.511-16025160270482634.512-200321802854834--37o30'200402003205540--37o30'240502303656448--37o30'3206529041O8266--37o30'3008031O4309578--37o30'3001003504701171OO--37o30'350125400500143126--37o30'350150480533167150--37o30'4001O6.4130245361O18.41O-12015130245361522.51O-12020150265442028.511-16025160270482534.512-200321802804833--37o30'200402003205539--37o30'240502303656448--37o30'3206529041O8265--37o30'3208031O4309576--37o30'36010035047011798--37o30'400125480500143123--37o30'400150480533167148--37o30'5001O10.O130245361O18.41O-12015130245361422.51O-12020150265442028.511-16025160270482534.512-200321802854832--37o30'200402003205538--37o30'240502303556448--37o30'3206529041O8263--37o30'3208031O4309574--37o30'3601OO35047011797--37o30'400125400500143123--37o30'400150480533167148--37o30'500注：PN4.0(40)阀门允许作为PN1.0(10)、PN1.6(16)、PN2.5(25)压力级选用NKJ61H真空截止阀)