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 Valve ctrucure type
NKJ61H真空截止阀；
NKJ61H真空截止阀主要性能规范
|
产品类型
Product type
|
壳体强度试验/MPa
Sheli strangth test
|
上密封试验/MPa
Back seal test
|
密封试验/MPa
Seal test
|
适用介质
Applicable
medium
|
适用温度/℃
Applicable
temperature
|
|
NKJ61H-40
|
6.O
|
4.4
|
4.4
|
水、蒸汽、空气
Water、Steam、Air
|
≤425
|
|
NKJ61H-64
|
96
|
7.O
|
7.O
|
|
NKJ61H-100
|
15.O
|
11.0
|
11.O
|
|
NKJ61Y-40l
|
6.O
|
4.4
|
4.4
|
水、蒸汽、空气
Water、Steam、Air
|
≤550
|
|
NKJ61Y-64l
|
9.6
|
7.0
|
7.O
|
|
NKJ61Y-1OOI
|
15.O
|
11.O
|
11.O
|
·NKJ61H真空截止阀主要零件材料 Material for Main
Parts
|
零件名称
Part name
|
阀体、阀盖 Body Bonnet
|
阀杆
Valve Stem
|
阀瓣 Disc
|
密封面
Sealing face
|
阀杆螺母
Yokenut
|
填料
Packing
|
紧固件
Fasteher
|
|
NKJ61H-C型
|
25或WCB
|
铬不锈钢
Crstain
mless
teel
|
铬不锈钢
Crstain
mless
steel
|
H：合金钢
H：alloy steel
|
铝青铜
AI
bronze
|
膨胀复合石墨
Expanding
compound
graphlte
|
优质碳钢
High-grade
carbon
steel
|
|
NKJ61Y-l型
|
铬钼钢
Cr.Mo steel
|
20CrlM01vA 或38CrMoAlA
|
12CrlMo 1VA
|
Y：硬质合金
Y:oarbide alloy
|
铬钼钢
Cr.Mo steel
|
|
|
|
·主要尺寸及重量Maindimensions and
weight
|
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 connectingd mensions
|
|
L
|
H
|
D
|
D0
|
D1
|
L1
|
α
|
W
|
|
1O
|
4.0
|
130
|
245
|
36
|
11
|
18.4
|
1O
|
-
|
120
|
|
15
|
130
|
245
|
36
|
16
|
22.5
|
1O
|
-
|
120
|
|
20
|
150
|
265
|
44
|
21
|
28.5
|
11
|
-
|
160
|
|
25
|
160
|
270
|
48
|
26
|
34.5
|
12
|
-
|
200
|
|
32
|
180
|
285
|
48
|
34
|
-
|
-
|
37o30'
|
200
|
|
40
|
200
|
320
|
55
|
40
|
-
|
-
|
37o30'
|
240
|
|
50
|
230
|
365
|
64
|
48
|
-
|
-
|
37o30'
|
320
|
|
65
|
290
|
41O
|
82
|
66
|
-
|
-
|
37o30'
|
300
|
|
80
|
31O
|
430
|
95
|
78
|
-
|
-
|
37o30'
|
300
|
|
100
|
350
|
470
|
117
|
1OO
|
-
|
-
|
37o30'
|
350
|
|
125
|
400
|
500
|
143
|
126
|
-
|
-
|
37o30'
|
350
|
|
150
|
480
|
533
|
167
|
150
|
-
|
-
|
37o30'
|
400
|
|
1O
|
6.4
|
130
|
245
|
36
|
1O
|
18.4
|
1O
|
-
|
120
|
|
15
|
130
|
245
|
36
|
15
|
22.5
|
1O
|
-
|
120
|
|
20
|
150
|
265
|
44
|
20
|
28.5
|
11
|
-
|
160
|
|
25
|
160
|
270
|
48
|
25
|
34.5
|
12
|
-
|
200
|
|
32
|
180
|
280
|
48
|
33
|
-
|
-
|
37o30'
|
200
|
|
40
|
200
|
320
|
55
|
39
|
-
|
-
|
37o30'
|
240
|
|
50
|
230
|
365
|
64
|
48
|
-
|
-
|
37o30'
|
320
|
|
65
|
290
|
41O
|
82
|
65
|
-
|
-
|
37o30'
|
320
|
|
80
|
31O
|
430
|
95
|
76
|
-
|
-
|
37o30'
|
360
|
|
100
|
350
|
470
|
117
|
98
|
-
|
-
|
37o30'
|
400
|
|
125
|
480
|
500
|
143
|
123
|
-
|
-
|
37o30'
|
400
|
|
150
|
480
|
533
|
167
|
148
|
-
|
-
|
37o30'
|
500
|
|
1O
|
10.O
|
130
|
245
|
36
|
1O
|
18.4
|
1O
|
-
|
120
|
|
15
|
130
|
245
|
36
|
14
|
22.5
|
1O
|
-
|
120
|
|
20
|
150
|
265
|
44
|
20
|
28.5
|
11
|
-
|
160
|
|
25
|
160
|
270
|
48
|
25
|
34.5
|
12
|
-
|
200
|
|
32
|
180
|
285
|
48
|
32
|
-
|
-
|
37o30'
|
200
|
|
40
|
200
|
320
|
55
|
38
|
-
|
-
|
37o30'
|
240
|
|
50
|
230
|
355
|
64
|
48
|
-
|
-
|
37o30'
|
320
|
|
65
|
290
|
41O
|
82
|
63
|
-
|
-
|
37o30'
|
320
|
|
80
|
31O
|
430
|
95
|
74
|
-
|
-
|
37o30'
|
360
|
|
1OO
|
350
|
470
|
117
|
97
|
-
|
-
|
37o30'
|
400
|
|
125
|
400
|
500
|
143
|
123
|
-
|
-
|
37o30'
|
400
|
|
150
|
480
|
533
|
167
|
148
|
-
|
-
|
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
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