弹簧全启封闭式式安全阀A42H-16C/A42H-25C/A42H-40C-弹簧全启封闭式安全阀
A42H-C型适用于工作温度≤300℃空气、石油气、液体等介质的设备和管路上。A42Y-P型及A42Y-R型适用于工作温度≤200℃有腐蚀性的介质的设备和管路上，作为超压保护装置。
; ; ; ;连接法兰标准按JB/T……-94系列1。≥6.4MPa按JB/T……-94系列2。
主要零部件材料
| NO. | 零件名称 | A42Y-C/KA42Y-C材料 | A42Y-P/KA42Y-P材料 | A42Y-R材料 | DA42Y-P材料 |
| 1 | 阀座 | 2Cr13/1Cr18Ni9Ti | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti | ZG1Cr18Ni9Ti |
| 2 | 阀体 | WCB | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti | LCB/ZG1Cr18Ni9Ti |
| 3 | 调节圈 | 2Cr13/1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| 4 | 反冲盘 | 2Cr13/1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| 5 | 阀瓣 | 2Cr13/1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| 6 | 导向套 | 2Cr13/1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| 7 | 阀盖 | ZG230-450 | ZG230-450 | ZG230-450 | ZG1Cr18Ni9Ti |
| 8 | 弹簧 | 50CrVA | 50CrVA包覆氟塑料 | 50CrVA包覆氟塑料 | 50CrVA |
| 9 | 阀杆 | 2Cr13 | 1Cr18Ni9Ti/1Cr18Ni12Mo2Ti | 1Cr18Ni9Ti/1Cr18Ni12Mo2Ti | 1Cr18Ni9Ti |
| 10 | 调整螺杆 | 45 | 2Cr13 | 2Cr13 | 2Cr13 |
| 11 | 阀帽 | ZG200-400 | ZG200-400 | ZG200-400 | ZG230-450 |
| ; | 密封面材料 | 堆焊Co基硬质合金 | |||
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 | g3 | g2 | b1 | f" | f1" | Z1-ød1 | L | L1 | ≈H |
| A42H-16C A42Y-16P A42Y-16R KA42Y-16C DA42Y-16C（P） | 20 | 15 | 105 | 75 | ; | 55 | 16 | 2 | ; | 4-14 | 25 | 115 | 85 | ; | 65 | 16 | 2 | ; | 4-14 | 110 | 95 | 378 |
| 25 | 16 | 115 | 85 | ; | 65 | 16 | 2 | ; | 4-14 | 32 | 140 | 100 | ; | 78 | 18 | 2 | ; | 4-18 | 110 | 95 | 378 | |
| 32 | 20 | 140 | 100 | ; | 78 | 18 | 2 | ; | 4-18 | 40 | 150 | 110 | ; | 85 | 18 | 3 | ; | 4-18 | 115 | 100 | 378 | |
| 40 | 25 | 150 | 110 | ; | 85 | 18 | 3 | ; | 4-18 | 50 | 165 | 125 | ; | 100 | 20 | 3 | ; | 4-18 | 120 | 110 | 406 | |
| 50 | 32 | 165 | 125 | ; | 100 | 20 | 3 | ; | 4-18 | 65 | 185 | 145 | ; | 120 | 20 | 3 | ; | 4-18 | 135 | 120 | 450 | |
| 65 | 40 | 185 | 145 | ; | 120 | 20 | 3 | ; | 4-18 | 80 | 200 | 160 | ; | 135 | 20 | 3 | ; | 8-18 | 160 | 140 | 520 | |
| 80 | 50 | 200 | 160 | ; | 135 | 20 | 3 | ; | 8-18 | 100 | 220 | 180 | ; | 155 | 22 | 3 | ; | 8-18 | 170 | 135 | 525 | |
| 100 | 65 | 220 | 180 | ; | 155 | 22 | 3 | ; | 8-18 | 125 | 250 | 210 | ; | 185 | 22 | 3 | ; | 8-18 | 195 | 175 | 690 | |
| 125 | 80 | 250 | 210 | ; | 185 | 22 | 3 | ; | 8-18 | 150 | 285 | 240 | ; | 210 | 24 | 3 | ; | 8-23 | 210 | 190 | 780 | |
| 150 | 100 | 285 | 240 | ; | 210 | 24 | 3 | ; | 8-23 | 175 | 310 | 270 | ; | 240 | 26 | 3 | ; | 8-23 | 255 | 230 | 838 | |
| 200 | 125 | 340 | 295 | ; | 265 | 26 | 3 | ; | 12-23 | 250 | 405 | 355 | ; | 320 | 30 | 3 | ; | 12-26 | 300 | 260 | 992 | |
| 250 | 150 | 405 | 355 | ; | 320 | 30 | 3 | ; | 12-26 | 300 | 460 | 410 | ; | 375 | 30 | 4 | ; | 12-26 | 350 | 320 | 1266 | |
| 300 | 220 | 460 | 410 | ; | 375 | 30 | 4 | ; | 12-26 | 400 | 580 | 525 | ; | 485 | 36 | 4 | ; | 16-30 | 370 | 350 | 1283 | |
| 350 | 250 | 520 | 470 | ; | 435 | 34 | 4 | ; | 16-26 | 500 | 715 | 650 | ; | 608 | 44 | 4 | ; | 20-34 | 500 | 450 | 1520 | |
| 400 | 280 | 580 | 525 | ; | 485 | 36 | 4 | ; | 16-30 | 500 | 715 | 650 | ; | 608 | 44 | 4 | ; | 20-34 | 500 | 450 | 1530 | |
| A42H-25C A42Y-25P A42Y-25R KA42Y-25C DA42Y-25（P） | 20 | 15 | 105 | 75 | ; | 55 | 16 | 2 | ; | 4-14 | 25 | 115 | 85 | ; | 65 | 16 | 2 | ; | 4-14 | 110 | 95 | 378 |
| 25 | 16 | 115 | 85 | ; | 65 | 16 | 2 | ; | 4-14 | 32 | 140 | 100 | ; | 78 | 18 | 2 | ; | 4-18 | 110 | 95 | 378 | |
| 32 | 20 | 140 | 100 | ; | 78 | 18 | 2 | ; | 4-18 | 40 | 150 | 110 | ; | 85 | 18 | 3 | ; | 4-18 | 115 | 100 | 378 | |
| 40 | 25 | 150 | 110 | ; | 85 | 18 | 3 | ; | 4-18 | 50 | 165 | 125 | ; | 100 | 20 | 3 | ; | 4-18 | 120 | 110 | 406 | |
| 50 | 32 | 165 | 125 | ; | 100 | 20 | 3 | ; | 4-18 | 65 | 185 | 145 | ; | 120 | 20 | 3 | ; | 4-18 | 135 | 120 | 450 | |
| 65 | 40 | 185 | 145 | ; | 120 | 22 | 3 | ; | 8-18 | 80 | 200 | 160 | ; | 135 | 20 | 3 | ; | 8-18 | 160 | 140 | 520 | |
| 80 | 50 | 200 | 160 | ; | 135 | 22 | 3 | ; | 8-18 | 100 | 220 | 180 | ; | 155 | 22 | 3 | ; | 8-18 | 170 | 135 | 525 | |
| 100 | 65 | 230 | 190 | ; | 160 | 24 | 3 | ; | 8-23 | 125 | 250 | 210 | ; | 185 | 22 | 3 | ; | 8-18 | 195 | 175 | 690 | |
| 125 | 80 | 270 | 220 | ; | 188 | 28 | 3 | ; | 8-26 | 150 | 285 | 240 | ; | 210 | 24 | 3 | ; | 8-23 | 210 | 190 | 780 | |
| 150 | 100 | 300 | 250 | ; | 218 | 30 | 3 | ; | 8-26 | 175 | 310 | 270 | ; | 240 | 26 | 3 | ; | 8-23 | 255 | 230 | 838 | |
| 200 | 125 | 360 | 310 | ; | 278 | 34 | 3 | ; | 12-26 | 250 | 405 | 355 | ; | 320 | 30 | 3 | ; | 12-26 | 300 | 260 | 992 | |
| 250 | 150 | 425 | 370 | ; | 332 | 36 | 3 | ; | 12-30 | 300 | 460 | 410 | ; | 375 | 30 | 4 | ; | 12-26 | 350 | 320 | 1266 | |
| 300 | 220 | 485 | 430 | ; | 390 | 40 | 4 | ; | 16-30 | 400 | 580 | 525 | ; | 485 | 36 | 4 | ; | 16-30 | 370 | 350 | 1283 | |
| A42H-40C A42Y-40P A42Y-40R KA42Y-40C DA42Y-40（P） | 20 | 15 | 105 | 75 | 51 | 55 | 16 | 2 | 4 | 4-14 | 25 | 115 | 85 | ; | 65 | 16 | 2 | ; | 4-14 | 110 | 95 | 378 |
| 25 | 16 | 115 | 85 | 58 | 65 | 16 | 2 | 4 | 4-14 | 32 | 140 | 100 | ; | 78 | 18 | 2 | ; | 4-18 | 110 | 95 | 378 | |
| 32 | 20 | 140 | 100 | 66 | 78 | 18 | 2 | 4 | 4-18 | 40 | 150 | 110 | ; | 85 | 18 | 3 | ; | 4-18 | 115 | 100 | 378 | |
| 40 | 25 | 150 | 110 | 76 | 85 | 18 | 3 | 4 | 4-18 | 50 | 165 | 125 | ; | 100 | 20 | 3 | ; | 4-18 | 120 | 110 | 406 | |
| 50 | 32 | 165 | 125 | 88 | 100 | 20 | 3 | 4 | 4-18 | 65 | 185 | 145 | ; | 120 | 20 | 3 | ; | 4-18 | 135 | 120 | 450 | |
| 65 | 40 | 185 | 145 | 110 | 120 | 22 | 3 | 4 | 8-18 | 80 | 200 | 160 | ; | 135 | 20 | 3 | ; | 8-18 | 160 | 140 | 520 | |
| 80 | 50 | 200 | 160 | 121 | 135 | 22 | 3 | 4 | 8-18 | 100 | 220 | 180 | ; | 155 | 22 | 3 | ; | 8-18 | 170 | 135 | 525 | |
| 100 | 65 | 235 | 190 | 150 | 160 | 24 | 3 | 4.5 | 8-23 | 125 | 250 | 210 | ; | 185 | 22 | 3 | ; | 8-18 | 195 | 175 | 690 | |
| 125 | 80 | 270 | 220 | 176 | 188 | 28 | 3 | 4.5 | 8-26 | 150 | 285 | 240 | ; | 210 | 24 | 3 | ; | 8-23 | 210 | 190 | 780 | |
| 150 | 100 | 300 | 250 | 204 | 218 | 30 | 3 | 4.5 | 8-26 | 175 | 310 | 270 | ; | 240 | 26 | 3 | ; | 8-23 | 255 | 230 | 838 | |
| 200 | 125 | 375 | 320 | 260 | 282 | 38 | 3 | 4.5 | 12-30 | 250 | 405 | 355 | ; | 320 | 30 | 3 | ; | 12-26 | 300 | 260 | 992 | |
| 250 | 150 | 450 | 385 | 313 | 345 | 42 | 3 | 4.5 | 12-34 | 300 | 460 | 410 | ; | 375 | 30 | 4 | ; | 12-26 | 350 | 320 | 1266 |