双联弹簧式安全阀适用于工作温度≤350℃的蒸汽、水等介质的设备和管路上。作为超压保护装置。
A38Y、A43H、A37H型双联弹簧式安全阀除三通（材料为WCB）外，其余零件的材料均和A47H、A48Y型弹簧式安全阀相同。
A38Y、A43H、A37H型双联安全阀是在Y型接头上装设两个同样规格的A48Y或A47H型安全阀而构成，其公称通径系列指Y型接头进口通径，其组合情况如下表：
A38Y、A43H、A37H型双联弹簧式安全阀除三通（材料为WCB）外，其余零件的材料均和A47H、A48Y型弹簧式安全阀相同。
A38Y、A43H、A37H型双联安全阀是在Y型接头上装设两个同样规格的A48Y或A47H型安全阀而构成，其公称通径系列指Y型接头进口通径，其组合情况如下表：
|
A38Y双联型
|
相应的A48Y型
|
|
50
|
32×2
|
|
80
|
50×2
|
|
100
|
65×2
|
|
150
|
100×2
|
|
A43Y双联型
|
相应的A47Y型
|
|
50
|
32×2
|
|
80
|
50×2
|
|
100
|
80×2
|
|
125
|
100×2
|
|
150
|
125×2
|
|
A37Y双联型
|
相应的A47Y型
|
|
50
|
32×2
|
|
80
|
65×2
|
|
100
|
80×2
|
|
125
|
100×2
|
|
150
|
125×2
|
主要外形尺寸
|
型号
|
公称通径
|
do
|
D
|
K
|
g
|
g1
|
b
|
f
|
f1
|
Z-ød
|
DN’
|
D1
|
K1
|
g2
|
b1
|
f’
|
Z1-ød1
|
L
|
L1
|
L0
|
h
|
H
|
|
A37H-16C A43H-16C
|
50
|
25
|
165
|
125
|
100
|
20
|
3
|
4-18
|
32
|
140
|
100
|
78
|
18
|
2
|
4-18
|
115
|
110
|
165
|
235
|
547
|
||
|
80
|
40
|
200
|
160
|
135
|
20
|
3
|
8-18
|
50
|
165
|
125
|
100
|
16
|
3
|
4-18
|
135
|
120
|
190
|
285
|
795
|
|||
|
80
|
50
|
200
|
160
|
135
|
20
|
3
|
8-18
|
65
|
185
|
145
|
120
|
18
|
3
|
4-18
|
140
|
130
|
205
|
310
|
835
|
|||
|
100
|
65
|
220
|
180
|
155
|
22
|
3
|
8-18
|
80
|
200
|
160
|
135
|
20
|
3
|
8-18
|
160
|
135
|
255
|
355
|
890
|
|||
|
125
|
80
|
250
|
210
|
185
|
22
|
3
|
8-18
|
100
|
220
|
180
|
155
|
22
|
3
|
8-18
|
170
|
160
|
260
|
410
|
1170
|
|||
|
150
|
100
|
285
|
240
|
210
|
24
|
3
|
8-23
|
125
|
250
|
210
|
185
|
22
|
3
|
8-18
|
190
|
190
|
275
|
430
|
1240
|
|||
|
A37H-25 A43H-25
|
50
|
25
|
165
|
125
|
100
|
20
|
3
|
4-18
|
32
|
140
|
100
|
78
|
18
|
2
|
4-18
|
115
|
110
|
165
|
235
|
547
|
||
|
80
|
40
|
200
|
160
|
135
|
22
|
3
|
8-18
|
50
|
165
|
125
|
100
|
16
|
3
|
4-18
|
135
|
120
|
190
|
285
|
795
|
|||
|
80
|
50
|
200
|
160
|
135
|
22
|
3
|
8-18
|
65
|
185
|
145
|
120
|
18
|
3
|
4-18
|
140
|
130
|
205
|
310
|
835
|
|||
|
100
|
65
|
230
|
190
|
160
|
24
|
3
|
8-23
|
80
|
200
|
160
|
135
|
20
|
3
|
8-18
|
160
|
135
|
255
|
355
|
890
|
|||
|
125
|
80
|
270
|
220
|
188
|
28
|
3
|
8-26
|
100
|
220
|
180
|
155
|
22
|
3
|
8-18
|
170
|
160
|
260
|
410
|
1170
|
|||
|
150
|
100
|
300
|
250
|
218
|
30
|
3
|
8-26
|
125
|
250
|
210
|
185
|
22
|
3
|
8-18
|
190
|
190
|
275
|
430
|
1240
|
|||
|
A37H-40 A43H-40
|
50
|
25
|
165
|
125
|
100
|
88
|
20
|
3
|
4
|
4-18
|
32
|
140
|
100
|
78
|
16
|
2
|
4-18
|
115
|
110
|
165
|
235
|
547
|
|
80
|
40
|
200
|
160
|
135
|
121
|
22
|
3
|
4
|
8-18
|
50
|
165
|
125
|
100
|
16
|
3
|
4-18
|
135
|
120
|
190
|
285
|
795
|
|
|
80
|
50
|
200
|
160
|
135
|
121
|
22
|
3
|
4
|
8-18
|
65
|
185
|
145
|
120
|
18
|
3
|
4-18
|
140
|
130
|
205
|
310
|
835
|
|
|
100
|
65
|
235
|
190
|
160
|
150
|
24
|
3
|
4.5
|
8-23
|
80
|
200
|
160
|
135
|
20
|
3
|
8-18
|
160
|
135
|
255
|
355
|
890
|
|
|
125
|
80
|
270
|
220
|
188
|
176
|
28
|
3
|
4.5
|
8-26
|
100
|
220
|
180
|
155
|
22
|
3
|
8-18
|
170
|
160
|
260
|
410
|
1170
|
|
|
150
|
100
|
300
|
250
|
218
|
204
|
30
|
3
|
4.5
|
8-26
|
125
|
250
|
210
|
185
|
22
|
3
|
8-18
|
190
|
190
|
275
|
430
|
1240
|
|
|
A38Y-16C
|
50
|
20
|
165
|
125
|
100
|
20
|
3
|
4-18
|
40
|
150
|
110
|
85
|
16
|
3
|
4-18
|
198
|
100
|
165
|
225
|
636
|
||
|
80
|
32
|
200
|
160
|
135
|
20
|
3
|
8-18
|
65
|
185
|
145
|
120
|
20
|
3
|
4-18
|
230
|
120
|
190
|
265
|
817
|
|||
|
100
|
40
|
220
|
180
|
155
|
22
|
3
|
8-18
|
80
|
200
|
160
|
135
|
20
|
3
|
8-18
|
293
|
140
|
265
|
265
|
921
|
|||
|
150
|
80
|
285
|
240
|
210
|
24
|
3
|
8-23
|
125
|
250
|
210
|
185
|
22
|
3
|
8-18
|
320
|
175
|
250
|
420
|
1097
|
|||
|
A38Y-25
|
50
|
20
|
165
|
125
|
100
|
20
|
3
|
4-18
|
40
|
150
|
110
|
85
|
16
|
3
|
4-18
|
198
|
100
|
165
|
225
|
636
|
||
|
80
|
32
|
200
|
160
|
135
|
22
|
3
|
8-18
|
65
|
185
|
145
|
120
|
20
|
3
|
4-18
|
230
|
120
|
190
|
265
|
817
|
|||
|
100
|
40
|
230
|
190
|
160
|
24
|
3
|
8-23
|
80
|
200
|
160
|
135
|
20
|
3
|
8-18
|
293
|
140
|
265
|
265
|
921
|
|||
|
150
|
80
|
300
|
250
|
218
|
30
|
3
|
8-26
|
125
|
250
|
210
|
185
|
22
|
3
|
8-18
|
320
|
175
|
250
|
420
|
1097
|
|||
|
A38Y-40
|
50
|
20
|
165
|
125
|
100
|
88
|
20
|
3
|
4
|
4-18
|
40
|
150
|
110
|
85
|
16
|
3
|
4-18
|
198
|
100
|
165
|
225
|
636
|
|
80
|
32
|
200
|
160
|
135
|
121
|
22
|
3
|
4
|
8-18
|
65
|
185
|
145
|
120
|
20
|
3
|
4-18
|
230
|
120
|
190
|
265
|
817
|
|
|
100
|
40
|
235
|
190
|
160
|
150
|
24
|
3
|
4.5
|
8-23
|
80
|
200
|
160
|
135
|
20
|
3
|
8-18
|
293
|
140
|
265
|
265
|
921
|
|
|
150
|
80
|
300
|
250
|
218
|
204
|
30
|
3
|
4.5
|
8-26
|
125
|
250
|
210
|
185
|
22
|
3
|
8-18
|
320
|
175
|
250
|
420
|
1097
|
