真空隔離閘閥概述及結構特點
本系列閥門連線形式分法蘭、焊接兩種，驅動方式有手動、電動兩種。該閥門適用於工作溫度≤425℃和≤550℃，工作介質為水、蒸汽或空氣的管路上，作為啟閉裝置；尤其適用於火電廠汽機冷凝和真空負壓系統，起真空隔離密封作用。
閘閥結構特點
1、設計了真空密封結構填料室，使系統與大氣隔離，具有良好的環保性能。
2、選材考究，符全國內外相關標準，材料的全面質量高。
3、密封副配對先進合理，提高了密封性能，使用壽命長。
4、啟閉件採用平行閘板雙向彈性密封，摩擦力小，啟閉輕鬆，維修方便，密封可靠，性能優良。
5、閥桿經調質及表面氮化處理，有良好的抗腐蝕性、抗擦傷性和耐磨性。
6、法蘭墊片採用複合材料，膨脹係數大、氣密性能好、保證系統與大氣隔離可靠。
真空隔離閘閥試驗壓力
公稱壓力PN/MPa
Nominal
pressure試驗壓力/MPaSealtest
殼體強度試驗
Shellstrength上密封試驗
Backsealtest密封試驗
Seattest
1.01.51.11.1
1.62.41.81.8
2.53.82.82.8
4.06.O4.44.4
6.48.67.O7.0
1O.O15.O11.O11.O
真空隔離閘閥使用範圍
產品類型Producttype適用介質
applicablemedium適用溫度/℃
Applicabletemperature
NKZ41H
NKZ44H
NKZ944H-C型
NKZ941H水、蒸汽、空氣
Water，Steam，Air≤425
NKZ41H(Y)
NKZ44H(Y)-I型
NKZ944H(Y)-I型
NKZ941H(Y)水、蒸汽、空氣
Water，Steam，Air≤550
真空隔離閘閥主要零件材料
零件名稱Partname閥體、閥蓋
BodyBonnet閥桿
Stem閘板
Wedgegate密封面
Sealingface閥桿螺母
Yokenut填料
Parking緊固件
fastener
NKZ44H
NKZ41H-C型
NKZ944H-C型
NKZ941HWCB2Crl325H：合金鋼
H：alloysteel鋁青銅
Albronze膨脹複合石墨
Expanding
comDound
graphite優質碳鋼
High-grade
carbonsteel
NKZ44
NKZ41Y-I型
NKZ944-I型
NKZ941鉻鉬鋼
Cr.Mosteel20CrlMo1VA
38CrMoAlA鉻鉬鋼
Cr.MosteelY：硬質合金
Y：carbidealloy鉻鉬鋼
Cr.Mosteel
真空隔離閘閥主要尺寸及重量
公稱通徑DN/mm
Nominal
diameter公稱壓力
PN/MPa
Nominal
pressure主要外形尺寸和連線尺寸/mm
Mainextemalandconnectingdimensions閥門
重量
/kg
Valve
weight附法蘭尺寸/mm
Additionalflange’s
dimensions
LHDD1D2bfz-dWhD0Dn
501.O2503451601251OO1634-1825028454958
652703951801451201834-1825040486475
802804251951601352034-1830055507897
10030051O2151801552038-18300725296110
12532557024521O1852238-1835010660120136
15035072528024021O2438-1835014660145163
2004008203352952652638-1840022062202223
25045089039035032028312-2340031562225278
300500107044040036828312-2345039865303330
350550132050046042830416-2355053065351382
400600145056551548232416-2555069065398432
450650156061556553232420-2560087070460485
500700172067062058534420-25650108078500535
600800188078072568536520-30700135090600636
700900208589584080040524-30750195090690726
8001OOO2590101O95090544524-348002500106790826
501.62503451601251OO1634-1825028484958
652703951801451201834-1825040506475
802804251951601352038-1830058527891
10030051O2151801552038-18300755296110
12532557024521O1852238-1835011060120136
15035072528024021O2438-2335015060145163
20040082033529526526312-2340022362201223
25045089040535532030312-2545032668253278
300500107046041O37530312-2555043270303330
350550132052047043534416-2560057278351382
400600145058052548536416-3065074090398432
450650156064058554540420-3070095595450485
500700172070565060844420-34750119598500535
600800188084077071848520-418001455105600636
7009002085g1O84078850524-41850211O11O690726
8001OOO2590102095089852524-419502630115790826
公稱通徑
DN/mm
Nominal
diameter公稱壓力
PN/MPa
Nominal
pressure主要外形尺寸和連線尺寸/mm
Mainexternalandconnectingdimensions閥門
重量
/kg
Valve
weight附法蘭尺寸/mm
Additionalflange’sdimensions
LHDD1D2bfZ-dWhDODn
502．52503451601251002034-1825030484964
652703951801451202238-1825043526682
802804251951601352238-1830060557895
1OO3005102301901602438-233007962100117
1253255702702201882838-2535011468125144
1503507253002502183038-2535015772151172
20040082036031027834312-2540024360201223
25045089042537033236312-3045034585253278
300500107048343039040416-3055045592303330
35055013205504g044844416-3465061598351382
400 145061055050548416-347007g4115398432
450650156066060055550420-347501018115450483
500700172073066061O52420-418001250120498535
600800188084077071856520-418501528130598636
700900208595587581560524-489002265140688726
80010002590107099093064524-4810002847150788826
公稱通徑
DN/mm
Nominal
di8m8ter公稱壓力
PN/MPa
Nominal
pressure主要外形尺寸和連線尺寸/mm
Mainexternalandconnectingdimensions閥門
重量
/kg
Valve
weight附法蘭尺寸/mm
Additionalflange’sdimensions
LHDD1D2bfD6f2z-dWhDODn
504．O2503451601251002038844-1830035484864
6527039518014512022311O48-1830049526682
8028042519516013522312148-1835065587895
1003005102301901602431504.58-233508768100117
1253255702702201882831764.58-2540012468125144
1503507253002502183032044.58-2540017272151172
2004008203753202823832604.512-304502758819g223
2504508904453853454233134.512-34550392102251278
300500107051O4504084643644.516-34650515116301330
3505501320570510465524422516-3475068412034g382
4006001450655585535584474516-41850902142396432
