产品用途：该系列阀门适用于工作温度≤425℃和≤550℃，工作介质为水、空气、蒸汽的管路上，作为起闭装置。尤其适用于火电厂汽机冷凝和真空负压系统，起到真空密封隔离作用。产品结构特点：1.本系列阀门主体采用铸锻结构，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.密封面之间摩擦系数小，起闭方便，而且，密封面的磨损有自动补偿功能。3.结构简单，紧凑，检修方便，使用寿命长。4.阀盖填料室设有真空密封机构，具有自胀押金压紧作用，并且，各连接面采用高强膨胀材料密封，使系统与大气隔离，具有很好的真空密封性能。5.本系列阀门连接形式分为法兰连接、焊接连接两种，驱动方式为手动、电动两种。试验压力公称压力MPa试验压力壳体强度试验上密封试验密封试验1.01.51.11.11.62.41.81.82.53.82.82.84.06.O4.44.46.48.67.O7.01O.O15.O11.O11.O使用范围产品类型适用介质适用温度/℃NKZ41HNKZ44HNKZ944H-C型NKZ941H水、蒸汽、空气≤425NKZ41H(Y)NKZ44H(Y)-I型NKZ944H(Y)-I型NKZ941H(Y)水、蒸汽、空气≤550主要零件材料零件名称阀体、阀盖阀杆闸板密封面阀杆螺母填料紧固件NKZ44HNKZ41H-C型NKZ944H-C型NKZ941HWCB2Crl325H：合金钢铝青铜膨胀复合石墨优质碳钢NKZ44NKZ41Y-I型NKZ944-I型NKZ941铬钼钢20CrlMo1VA38CrMoAlA铬钼钢Y：硬质合金铝青铜膨胀复合石墨铬钼钢主要尺寸及重量公称通径DN/mm公称压力PN/MPa主要外形尺寸和连接尺寸/mm重量/kg附法兰尺寸/mmLHDD1D2bfz-dWhD0Dn501.O2503451601251OO1634-1825028454958651.O2703951801451201834-1825040486475801.O2804251951601352034-18300555078971001.O30051O2151801552038-183007252961101251.O32557024521O1852238-18350106601201361501.O35072528024021O2438-18350146601451632001.O4008203352952652638-18400220622022232501.O45089039035032028312-23400315622252783001.O500107044040036828312-23450398653033303501.O550132050046042830416-23550530653513824001.O600145056551548232416-25550690653984324501.O650156061556553232420-25600870704604855001.O700172067062058534420-256501080785005356001.O800188078072568536520-307001350906006367001.O900208589584080040524-307501950906907268001.O1OOO2590101O95090544524-348002500106790826501.62503451601251OO1634-1825028484958651.62703951801451201834-1825040506475801.62804251951601352038-18300585278911001.630051O2151801552038-183007552961101251.632557024521O1852238-18350110601201361501.635072528024021O2438-23350150601451632001.640082033529526526312-23400223622012232501.645089040535532030312-25450326682532783001.6500107046041O37530312-25550432703033303501.6550132052047043534416-25600572783513824001.6600145058052548536416-30650740903984324501.6650156064058554540420-30700955954504855001.6700172070565060844420-347501195985005356001.6800188084077071848520-4180014551056006367001.69002085g1O84078850524-41850211O11O6907268001.61OOO2590102095089852524-419502630115790826主要尺寸及重量公称通径DN/mm公称压力PN/MPa主要外形尺寸和连接尺寸/mm重量/kg附法兰尺寸/mmLHDD1D2bfZ-dWhDODn50252503451601251002034-182503048496465252703951801451202238-182504352668280252804251951601352238-18300605578951OO253005102301901602438-233007962100117125253255702702201882838-2535011468125144150253507253002502183038-25350157721511722002540082036031027834312-25400243602012232502545089042537033236312-304503458525327830025500107048343039040416-30550455923033303502555013205504g044844416-346506159835138240025145061055050548416-347007g411539843245025650156066060055550420-34750101811545048350025700172073066061O52420-41800125012049853560025800188084077071856520-41850152813059863670025900208595587581560524-4890022651406887268002510002590107099093064524-4810002847150788826公称通径DN/mm公称压力PN/MPa主要外形尺寸和连接尺寸/mm重量/kg附法兰尺寸/mmLHDD1D2bfD6f2z-dWhDODn504．O2503451601251002038844-1830035484864654．O27039518014512022311O48-1830049526682804．O28042519516013522312148-18350655878951004．O3005102301901602431504.58-2335087681001171254．O3255702702201882831764.58-25400124681251441504．O3507253002502183032044.58-25400172721511722004．O4008203753202823832604.512-304502758819g2232504．O4508904453853454233134.512-345503921022512783004．O500107051O4504084643644.516-346505151163013303504．O5501320570510465524422516-3475068412034g3824004．O6001450655585535584474516-41850902142396432)