|
截止阀（stop valve,globe valve）的启闭件是塞形的阀瓣，密封面呈平面或锥面，阀瓣沿流体的中心线作直线运动。阀杆的运动形式，有升降杆式（阀杆升降，手轮不升降），也有升降旋转杆式（手轮与阀杆一起旋转升降，螺母设在阀体上）。截止阀只适用于全开和全关，不允许作调节和节流。
截止阀属于强制密封式阀门，所以在阀门关闭时，必须向阀瓣施加压力，以强制密封面不泄漏。当介质由阀瓣下方进入阀门时，操作力所需要克服的阻力，是阀杆和填料的摩擦力与由介质的压力所产生的推力，关阀门的力比开阀门的力大，所以阀杆的直径要大，否则会发生阀杆顶弯的故障。近年来，从自密封的阀门出现后，截止阀的介质流向就改由阀瓣上方进入阀腔，这时在介质压力作用下，关阀门的力小，而开阀门的力大，阀杆的直径可以相应地减少。同时，在介质作用下，这种形式的阀门也较严密。我国阀门“三化给”曾规定，截止阀的流向，一律采用自上而下。
截止阀开启时，阀瓣的开启高度，为公称直径的25%～30%时，流量已达到最大，表示阀门已达全开位置。所以截止阀的全开位置，应由阀瓣的行程来决定。
法兰式截止阀执行标准 administer standard
|
设计与制造 design and manufacture
|
结构长度
face to face
|
法兰尺寸
flange dimension
|
压力-温度 pressure temperature lating
|
试验-检验 inspection and test
|
|
gb122235
|
gb12221
|
gb9113 jb79
|
gb9131
|
gb/t13927 jb/t9092
|
法兰式截止阀压力试验 pressure test
|
公称压力nominalpressure
|
1.6
|
2.5
|
4.0
|
6.4
|
10.0
|
16.0
|
|
强度试验 shell test
|
2.4
|
3.8
|
6.0
|
9.6
|
15.0
|
24.0
|
|
水密封试验 water seal test
|
1.8
|
2.8
|
4.4
|
7.0
|
11.0
|
18.0
|
|
上密封试验backseat test
|
1.8
|
2.8
|
4.4
|
7.0
|
11.0
|
18.0
|
|
气密封试验 air seal test
|
0.5-0.7
|
法兰式截止阀主要零件材料及性能 main part materials and property
|
体、盖、板 body cover disc
|
阀杆
stem
|
密封面 sealing face
|
垫片
sealing shim
|
填料
packing
|
工作温度℃ working temperature
|
适用介质suitable medium
|
|
|
wcb
|
2cr13
|
13cr
stl
木体材料
with body
material
尼龙
nylon
|
增强柔性石墨
enhanced flexible graphite
13cr/柔性石墨
1cr13/flexible graphite
08软钢
08 soft steal
0cr18ni9ti
0cr17ni12mo2ti
xd550f(t)
ptfe
|
柔性石墨
增强柔性石墨
flexible graphite
enhanced flexible graphite
sfb/260
sfp/260
ptfe
|
≤425
|
水
蒸汽
油品
water
steam
petroleum
ptoducts
|
|
|
wc1
|
38crmoal
25cr2mov
|
≤450
|
|
|
wc6
|
≤540
|
|
|
wc9
|
≤570
|
|
|
c5 c12
|
≤540
|
|
|
zgcr5mo
|
≤200
|
硝酸类nitric acid
|
|
|
zg1cr18ni9ti
|
1cr18ni9ti
|
|
|
≤200
|
醋酸类acetic acid
|
|
|
zg1cr18ni12mo2ti
|
1cr18ni12mo2ti
|
|
法兰式截止阀规格 主要尺寸和重量 size main dimensions and weight (mm kg)
|
1.6mpa
|
dn
|
l
|
d
|
d1
|
d2
|
b
|
n-φd
|
h
|
do
|
重量 weight
|
|
凸面
法兰
rf
j41h
j41y
j41w
j41f
j41n
16c
16p
16r
16i
|
10
|
130
|
90
|
60
|
40
|
14
|
4-14
|
198
|
120
|
4.9
|
|
15
|
130
|
95
|
65
|
45
|
14
|
4-14
|
218
|
120
|
5.3
|
|
20
|
150
|
105
|
75
|
55
|
14
|
4-14
|
258
|
140
|
7.0
|
|
25
|
160
|
115
|
85
|
65
|
14
|
4-14
|
275
|
160
|
7.4
|
|
32
|
180
|
135
|
100
|
78
|
16
|
4-18
|
280
|
180
|
8.3
|
|
40
|
200
|
145
|
110
|
85
|
16
|
4-18
|
330
|
200
|
12.6
|
|
50
|
230
|
160
|
125
|
100
|
16
|
4-18
|
350
|
240
|
14
|
|
65
|
290
|
180
|
145
|
120
|
18
|
4-18
|
400
|
280
|
22.7
|
|
80
|
310
|
195
|
160
|
135
|
20
|
8-18
|
355
|
280
|
29
|
|
100
|
350
|
215
|
180
|
155
|
20
|
8-18
|
415
|
320
|
32.8
|
|
125
|
400
|
245
|
210
|
185
|
22
|
8-18
|
460
|
360
|
79.5
|
|
150
|
480
|
280
|
240
|
210
|
24
|
8-23
|
510
|
400
|
93
|
|
200
|
600
|
335
|
295
|
265
|
26
|
12-23
|
710
|
400
|
179
|
|
250
|
622
|
405
|
355
|
320
|
30
|
12-25
|
786
|
450
|
441
|
|
300
|
698
|
460
|
410
|
375
|
30
|
12-25
|
925
|
500
|
646
|
法兰式截止阀规格 主要尺寸和重量 size main dimensions and weight (mm kg)
|
2.5mpa
|
dn
|
l
|
d
|
d1
|
d2
|
b
|
n-φd
|
h
|
do
|
重量 weight
|
|
凸面法兰
rf
j41h
j41y
j41w
j41f
j41n
16c
16p
16r
16i
|
10
|
130
|
90
|
60
|
40
|
16
|
4-14
|
198
|
120
|
4.9
|
|
15
|
130
|
95
|
65
|
45
|
16
|
4-14
|
218
|
120
|
5.3
|
|
20
|
150
|
105
|
75
|
55
|
16
|
4-14
|
258
|
140
|
7.0
|
|
25
|
160
|
115
|
85
|
65
|
16
|
4-14
|
275
|
160
|
7.4
|
|
32
|
180
|
135
|
100
|
78
|
18
|
4-18
|
280
|
180
|
8.3
|
|
40
|
200
|
145
|
110
|
85
|
18
|
4-18
|
330
|
200
|
12.6
|
|
50
|
230
|
160
|
125
|
100
|
20
|
8-18
|
350
|
240
|
16
|
|
65
|
290
|
180
|
145
|
120
|
22
|
8-18
|
400
|
280
|
25
|
|
80
|
310
|
195
|
160
|
135
|
22
|
8-23
|
355
|
280
|
30
|
|
100
|
350
|
230
|
190
|
160
|
24
|
8-25
|
415
|
320
|
34.8
|
|
125
|
400
|
270
|
220
|
188
|
28
|
8-25
|
460
|
360
|
89.5
|
|
150
|
480
|
300
|
250
|
218
|
30
|
12-25
|
510
|
400
|
99
|
|
200
|
600
|
360
|
310
|
278
|
34
|
12-25
|
710
|
400
|
181
|
|
250
|
622
|
425
|
370
|
332
|
36
|
12-30
|
786
|
450
|
445
|
|
300
|
698
|
485
|
430
|
390
|
40
|
16-30
|
925
|
500
|
651
|
法兰式截止阀规格 主要尺寸和重量 size main dimensions and weight (mm kg)
|
4.0mpa
|
dn
|
l
|
d
|
d1
|
d2
|
b
|
n-φd
|
h
|
d0
|
重量weight
|
|
凹凸法兰 mfm
j41h j41y j41w j41f j41n
40 40p 40r 40i
|
20
|
150
|
105
|
75
|
51
|
16
|
4-14
|
275
|
140
|
7
|
|
25
|
160
|
115
|
85
|
58
|
16
|
4-14
|
285
|
160
|
9
|
|
32
|
180
|
135
|
100
|
66
|
18
|
4-18
|
302
|
180
|
12
|
|
40
|
200
|
145
|
110
|
76
|
18
|
4-18
|
355
|
200
|
17
|
|
50
|
230
|
160
|
125
|
88
|
20
|
4-18
|
373
|
240
|
24
|
|
65
|
290
|
180
|
145
|
110
|
22
|
8-18
|
408
|
280
|
33
|
|
80
|
310
|
195
|
160
|
121
|
22
|
8-18
|
436
|
320
|
44
|
|
100
|
350
|
230
|
190
|
150
|
24
|
8-23
|
480
|
360
|
60
|
|
125
|
400
|
270
|
220
|
176
|
28
|
8-25
|
588
|
400
|
90
|
|
150
|
480
|
300
|
250
|
204
|
30
|
8-25
|
611
|
400
|
100
|
|
200
|
533
|
375
|
320
|
260
|
38
|
12-30
|
720
|
400
|
190
|
|
6.4mpa
|
20
|
190
|
125
|
90
|
51
|
20
|
4-18
|
228
|
160
|
13
|
|
凹凸法兰 mfm
j41h j41y j41w j41f j41n
40 40p 40r 40i
|
25
|
210
|
135
|
100
|
58
|
22
|
4-18
|
275
|
180
|
15
|
|
32
|
230
|
150
|
110
|
66
|
24
|
4-23
|
325
|
200
|
19
|
|
40
|
260
|
165
|
125
|
76
|
24
|
4-23
|
360
|
240
|
25
|
|
50
|
300
|
175
|
135
|
88
|
26
|
4-23
|
410
|
280
|
35
|
|
65
|
340
|
200
|
160
|
110
|
28
|
8-23
|
450
|
320
|
48
|
|
80
|
380
|
210
|
170
|
121
|
30
|
8-23
|
485
|
360
|
56
|
|
100
|
430
|
250
|
200
|
150
|
32
|
8-25
|
537
|
400
|
125
|
|
125
|
500
|
295
|
240
|
176
|
36
|
8-30
|
631
|
400
|
130
|
|
150
|
550
|
340
|
280
|
204
|
38
|
8-34
|
646
|
450
|
160
|
|
200
|
650
|
405
|
345
|
260
|
44
|
12-34
|
813
|
500
|
285
|
|
10.0mpa
|
10
|
170
|
100
|
70
|
35
|
20
|
4-14
|
198
|
120
|
6
|
|
凹凸法兰 mfm
j41h j41y j41w j41f j41n
100 100p 100r 100i
|
15
|
170
|
105
|
75
|
40
|
20
|
4-14
|
202
|
140
|
11
|
|
20
|
190
|
125
|
90
|
51
|
22
|
4-18
|
228
|
160
|
13
|
|
25
|
210
|
135
|
100
|
58
|
24
|
4-18
|
250
|
180
|
14
|
|
32
|
230
|
150
|
110
|
66
|
24
|
4-23
|
326
|
220
|
16
|
|
40
|
260
|
165
|
125
|
76
|
26
|
4-23
|
359
|
240
|
30
|
|
50
|
300
|
195
|
145
|
88
|
28
|
4-25
|
414
|
280
|
50
|
|
65
|
340
|
220
|
170
|
110
|
32
|
8-25
|
434
|
320
|
65
|
|
80
|
380
|
230
|
180
|
121
|
34
|
8-25
|
547
|
400
|
100
|
|
100
|
430
|
265
|
210
|
150
|
38
|
8-30
|
621
|
450
|
116
|
|
125
|
500
|
310
|
250
|
176
|
42
|
8-34
|
732
|
450
|
150
|
|
150
|
550
|
350
|
290
|
204
|
46
|
12-34
|
840
|
500
|
300
|
|
200
|
650
|
430
|
360
|
260
|
54
|
12-41
|
925
|
550
|
600
|
|
16.0
|
15
|
170
|
110
|
75
|
40
|
24
|
4-18
|
148
|
140
|
12
|
|
环槽法兰 rtj j41h j41y j41w
160 160p 160r 160i
|
20
|
190
|
130
|
90
|
51
|
26
|
4-23
|
156
|
160
|
15
|
|
25
|
210
|
140
|
100
|
58
|
28
|
4-23
|
175
|
180
|
17
|
|
32
|
230
|
165
|
115
|
66
|
30
|
4-25
|
200
|
200
|
21
|
|
40
|
260
|
175
|
125
|
76
|
32
|
4-27
|
231
|
240
|
31
|
|
50
|
300
|
215
|
165
|
88
|
36
|
8-25
|
262
|
250
|
53
|
|
65
|
340
|
245
|
190
|
110
|
44
|
8-30
|
303
|
320
|
70
|
|
80
|
380
|
260
|
205
|
121
|
46
|
8-30
|
341
|
400
|
100
|
|
100
|
430
|
300
|
240
|
150
|
48
|
8-34
|
485
|
450
|
120
|
|
