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真空隔离闸阀

真空隔离闸阀

19-1.jpg19-2.jpg

本系列阀门连接形式分法兰、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。

结构特点

1、设计了真空密封结构填料室,使系统与大气隔离,具有良好的性能。
2、选材考究,符内外相关标准,材料的质量高。
3、密封副配对合理,密封性能,使用寿命长。
4、启闭件采用平行闸板双向弹性密封,摩擦力小,启闭轻松,维修方便,密封可靠,性能优良。
5、阀杆经调质及表面氮化处理,有良好的抗腐蚀性、抗擦伤性和耐磨性。
6、法兰垫片采用复合材料,膨胀系数大、气密性能好、系统与大气隔离可靠。




试验压力

公称压力
PN/MPa
Nominal
pressure
试验压力/MPa Seal test
壳体强度试验
Shell strength
上密封试验
Back seal test
密封试验
Seat test
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



使用范围

产品类型
Product type
适用介质
Applicable medium
适用温度/℃
Applicable temperature
NKZ41H
NKZ44H
NKZ944H-C型
NKZ941H
水、蒸汽、空气
Water,Steam,Air
≤425
NKZ41H(Y)
NKZ44H(Y)-I型
NKZ944H(Y)-I型
NKZ941H(Y)
水、蒸汽、空气
Water,Steam,Air
≤550



主要零件材料


零件名称
Part name
阀体、阀盖
Body Bonnet
阀杆
Stem
闸板
Wedge gate
密封面
Sealing face
阀杆螺母
Yokenut
填料
Parking
紧固件
Fastener
NKZ44H
NKZ41H-C型
NKZ944H-C型
NKZ941H
WCB2Crl325H:合金钢
H:alloy steel
铝青铜
Albronze
膨胀复合石墨
Expanding
comDound
graphite
碳钢
High-grade
carbon steel
NKZ44
NKZ41Y-I型
NKZ944-I型
NKZ941
铬钼钢
Cr.Mo steel
20CrlMo1VA
38CrMoAlA
铬钼钢
Cr.Mo steel
Y:硬质合金
Y:carbide alloy
铬钼钢
Cr.Mo steel



主要尺寸及重量 

公称通径
DN/mm
Nominal
diameter
公称压力
PN/MPa
Nominal
pressure
主要外形尺寸和连接尺寸/mm
Main extemal and connecting dimensions



阀门
重量
/kg
Valve
weight
附法兰尺寸/mm
Additional flange’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
50


1.6

2503451601251OO1634-1825028484958
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



主要尺寸及重量


公称通径
DN/mm
Nominal
diameter
公称压力
PN/MPa
Nominal
pressure
主要外形尺寸和连接尺寸/mm
Mainexternalandconnectingdimensions
阀门
重量
/kg
Valve
weight
附法兰尺寸/mm
Additional flange’s dimensions
LHDD1D2bfZ-dWhDODn
50252503451601251002034-1825030484964
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


公称通径
DN/mm
Nominal
di8m8ter
公称压力
PN/MPa
Nominal
pressure

主要外形尺寸和连接尺寸/mm
Main external and connecting dimensions

阀门
重量
/kg
Valve
weight
附法兰尺寸/mm
Additional flange’s dimensions
LHDD1D2bfD6f2z-dW

h

DO

Dn

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