【 双联弹簧式安全阀主要零部件材料说明 】
A38Y、A43H、A37H型安全阀除三通（材料为WCB）外，欺余零件的材料均和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 |
【 双联弹簧式安全阀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 |
| 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 |
