A38Y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型 |
相应的A48Y型 |
|
50 |
32×2 |
|
80 |
50×2 |
|
100 |
65×2 |
|
150 |
100×2 |
|
A43Y型 |
相应的A47Y型 |
|
50 |
32×2 |
|
80 |
50×2 |
|
100 |
80×2 |
|
125 |
100×2 |
|
150 |
125×2 |
|
A37Y型 |
相应的A47Y型 |
|
50 |
32×2 |
|
80 |
65×2 |
|
100 |
80×2 |
|
125 |
100×2 |
|
150 |
125×2 |
外形尺寸和连接尺寸：
|
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 |
