低温闸阀适用于甲烷、液态天然气、已烯、二氧化碳、液氨、液氧、液氮、液氢等低温介质。
低温闸阀的特点：
1、为防止中腔异常升压，在闸板的进口侧设置了泄压孔
2、根据阀门的工作温度确定阀盖的顶部长度，确保阀桿填料的可靠密封
3、根据工作温度合理选用填料，垫片等零件的材料
4、严格控制材料的化学成份及低温冲击韧性等力学性能指标
5、采用多种配管法兰标准及密封面型式，适用于各种工程需要
一、执行标准
|
设计与制造
|
结构长度
|
法兰尺寸
|
压力-温度
|
试验-检验
|
|
JB/T7749
|
GB12221
|
JB79
|
Gb9131
|
JB/T9092
|
二、压力试验
|
公称压力PN
|
1.6
|
2.5
|
4.0
|
6.4
|
10.0
|
|
强度试验
|
2.4
|
3.8
|
6.0
|
9.6
|
15.0
|
|
水密封试验
|
1.8
|
2.8
|
4.4
|
7.0
|
11.0
|
|
上密封试验
|
1.8
|
2.8
|
4.4
|
7.0
|
11.0
|
|
气密封试验
|
0.4-0.7
|
三、主要零件材料及性能
|
体盖板
|
阀杆
|
密封面
|
垫片
|
填料
|
工作温度
|
适用介质
|
|
ZGoCrMNVAI低温高压铸钢
|
1Cr7Ni12
|
STL/STL
|
1Cr13/柔性石墨
低温石棉
|
PTFE浸聚四氟乙
烯石棉绳
柔性石墨
|
-46
|
丙烷/炳烯
甲醇/乙烷
煤气/液氨
|
|
LCB
|
|
ZGoCrMNVAI低温高压铸钢
|
-60
|
|
LC1
|
|
ZGoCrMNVAI低温高压铸钢
|
-73
|
|
LC2
|
|
ZGoCrMNVAI低温高压铸钢
|
1Cr18Ni9Ti
|
-101
|
|
LC3
|
|
ZGoCrMNVAI低温高压铸钢
|
-115
|
|
LC4
|
|
ZGoCrMNVAI低温高压铸钢
|
-196
|
|
CF8
|
四、规格主要尺寸(PN1.6MPa-2.5 MPa)
|
1.6MPa
|
DN
|
L
|
D
|
D1
|
D2
|
b
|
n-Φd
|
H
|
D0
|
|
凸面法法
RF
DZ40Y-16LCB
DZ40Y-16LC1
DZ40Y-16LC2
DZ40Y-16LC3
DZ40Y-16LC4
DZ40Y-16P
DZ40Y-16R
|
20
|
150
|
105
|
75
|
55
|
14
|
4-Φ14
|
320
|
140
|
|
25
|
160
|
115
|
85
|
65
|
14
|
4-Φ14
|
350
|
160
|
|
32
|
180
|
135
|
100
|
78
|
16
|
4-Φ18
|
385
|
180
|
|
40
|
200
|
145
|
110
|
85
|
16
|
4-Φ18
|
420
|
220
|
|
50
|
250
|
160
|
125
|
100
|
16
|
4-Φ18
|
540
|
240
|
|
65
|
265
|
180
|
145
|
120
|
18
|
4-Φ18
|
610
|
240
|
|
80
|
280
|
195
|
160
|
135
|
20
|
8-Φ18
|
690
|
280
|
|
100
|
300
|
215
|
180
|
155
|
20
|
8-Φ18
|
780
|
300
|
|
125
|
325
|
245
|
210
|
185
|
22
|
8-Φ18
|
930
|
320
|
|
150
|
350
|
280
|
240
|
210
|
24
|
8-Φ23
|
980
|
350
|
|
200
|
400
|
335
|
295
|
265
|
26
|
12-Φ26
|
1180
|
400
|
|
250
|
450
|
105
|
355
|
320
|
30
|
12-Φ30
|
1390
|
450
|
|
300
|
500
|
460
|
410
|
375
|
30
|
12-Φ30
|
1620
|
500
|
|
350
|
550
|
520
|
470
|
435
|
34
|
16-Φ34
|
1810
|
500
|
|
400
|
600
|
580
|
525
|
485
|
36
|
16-Φ36
|
1970
|
550
|
|
2.5MPa
|
20
|
150
|
105
|
75
|
55
|
16
|
4-Φ16
|
320
|
140
|
|
凸面法法
RF
DZ40Y-25LCB
DZ40Y-25LC1
DZ40Y-25LC2
DZ40Y-25LC3
DZ40Y-25LC4
DZ40Y-25P
DZ40Y-25R
|
25
|
160
|
115
|
85
|
65
|
16
|
4-Φ16
|
350
|
160
|
|
32
|
180
|
135
|
100
|
78
|
18
|
4-Φ18
|
385
|
180
|
|
40
|
200
|
145
|
110
|
85
|
18
|
4-Φ18
|
420
|
200
|
|
50
|
250
|
160
|
125
|
100
|
20
|
4-Φ20
|
540
|
240
|
|
65
|
265
|
180
|
145
|
125
|
22
|
8-Φ22
|
510
|
240
|
|
80
|
280
|
195
|
160
|
135
|
22
|
8-Φ22
|
690
|
280
|
|
100
|
300
|
230
|
190
|
160
|
24
|
8-Φ24
|
780
|
300
|
|
125
|
325
|
270
|
220
|
188
|
28
|
8-Φ28
|
930
|
300
|
|
150
|
350
|
300
|
250
|
218
|
30
|
8-Φ30
|
980
|
320
|
|
200
|
400
|
360
|
310
|
278
|
34
|
12-Φ34
|
1180
|
360
|
|
250
|
450
|
425
|
370
|
332
|
36
|
12-Φ36
|
1390
|
400
|
|
300
|
500
|
485
|
430
|
390
|
40
|
16-Φ40
|
1620
|
450
|
|
350
|
550
|
550
|
490
|
448
|
44
|
16-Φ44
|
1810
|
500
|
|
400
|
600
|
610
|
550
|
505
|
48
|
16-Φ48
|
1990
|
560
|
五、规格主要尺寸PN4.0MPa-10.0MPa
|
4.0 MPa
|
DN
|
L
|
D
|
D1
|
D2
|
D6
|
b
|
n-Φd
|
H
|
D0
|
|
凹面法法
MFM
DZ40Y-40LCB
DZ40Y-40LC1
DZ40Y-40LC2
DZ40Y-40LC3
DZ40Y-40LC4
DZ40Y-40P
DZ40Y-40R
|
20
|
150
|
105
|
75
|
55
|
51
|
16
|
4-Φ14
|
330
|
140
|
|
25
|
160
|
115
|
85
|
65
|
58
|
16
|
4-Φ14
|
360
|
160
|
|
32
|
180
|
135
|
100
|
78
|
66
|
18
|
4-Φ18
|
440
|
180
|
|
40
|
200
|
145
|
110
|
85
|
76
|
18
|
4-Φ18
|
455
|
200
|
|
50
|
250
|
160
|
125
|
100
|
88
|
20
|
4-Φ18
|
575
|
240
|
|
65
|
380
|
180
|
145
|
120
|
110
|
22
|
4-Φ20
|
635
|
240
|
|
80
|
3103
|
195
|
160
|
135
|
121
|
22
|
8-Φ22
|
715
|
280
|
|
100
|
50
|
230
|
190
|
160
|
150
|
24
|
8-Φ22
|
815
|
300
|
|
125
|
400
|
270
|
220
|
188
|
176
|
28
|
8-Φ24
|
965
|
360
|
|
150
|
450
|
300
|
250
|
218
|
204
|
30
|
8-Φ28
|
1025
|
400
|
|
200
|
550
|
375
|
320
|
282
|
160
|
38
|
8-Φ30
|
1225
|
450
|
|
250
|
650
|
445
|
385
|
345
|
313
|
42
|
12-Φ34
|
1440
|
560
|
|
300
|
750
|
510
|
450
|
408
|
364
|
46
|
16-Φ34
|
1665
|
5470
|
|
350
|
850
|
570
|
510
|
465
|
422
|
52
|
16-Φ41
|
1880
|
720
|
|
400
|
950
|
655
|
585
|
535
|
474
|
58
|
16-Φ18
|
2050
|
800
|
|
6.4MPa
|
20
|
190
|
125
|
90
|
68
|
51
|
20
|
4-Φ18
|
330
|
180
|
|
凹面法法
MFM
DZ40Y-64LCB
DZ40Y-64LC1
DZ40Y-64LC2
DZ40Y-64LC3
DZ40Y-64LC4
DZ40Y-64P
DZ40Y-64R
|
25
|
210
|
135
|
100
|
78
|
58
|
22
|
4-Φ23
|
360
|
180
|
|
32
|
230
|
150
|
110
|
82
|
66
|
24
|
4-Φ23
|
410
|
180
|
|
40
|
240
|
165
|
125
|
95
|
76
|
24
|
4-Φ23
|
480
|
220
|
|
50
|
250
|
175
|
135
|
105
|
88
|
26
|
4-Φ23
|
585
|
240
|
|
65
|
280
|
200
|
160
|
130
|
110
|
28
|
8-Φ23
|
690
|
240
|
|
80
|
310
|
210
|
170
|
140
|
121
|
30
|
8-Φ23
|
745
|
280
|
|
100
|
350
|
250
|
200
|
168
|
150
|
32
|
8-Φ25
|
885
|
300
|
|
125
|
400
|
295
|
240
|
202
|
176
|
36
|
8-Φ30
|
985
|
360
|
|
150
|
450
|
340
|
280
|
240
|
204
|
38
|
8-Φ34
|
1050
|
400
|
|
200
|
550
|
405
|
345
|
300
|
260
|
44
|
12-Φ34
|
1240
|
450
|
|
250
|
650
|
470
|
400
|
352
|
313
|
48
|
12-Φ41
|
1460
|
560
|
|
300
|
750
|
530
|
160
|
412
|
364
|
54
|
16-Φ41
|
1670
|
5640
|
|
10.0MPa
|
25
|
210
|
135
|
100
|
78
|
58
|
24
|
4-Φ18
|
365
|
200
|
|
凹面法法
MFM
DZ40Y-100LCB
DZ40Y-100LC1
DZ40Y-100LC2
DZ40Y-100LC3
DZ40Y-100LC4
DZ40Y-100P
DZ40Y-100R
|
32
|
230
|
150
|
110
|
82
|
66
|
24
|
4-Φ23
|
420
|
200
|
|
50
|
250
|
195
|
145
|
112
|
88
|
28
|
4-Φ25
|
630
|
240
|
|
65
|
280
|
220
|
170
|
138
|
110
|
32
|
8-Φ25
|
700
|
240
|
|
80
|
310
|
230
|
180
|
148
|
121
|
34
|
8-Φ25
|
760
|
280
|
|
100
|
350
|
265
|
210
|
172
|
150
|
38
|
8-Φ30
|
900
|
280
|
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