【真空负压安全阀主要零部件材料】
| NO. | 零件名称 | YFA72W-P材料 | YFA72W-R材料 |
| 1 | 阀体 | ZG1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| 2 | 阀座 | 1Cr18Ni9Ti | ZG1Cr18Ni12Mo2Ti |
| 3 | 调节圈 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 4 | 阀盖 | ZG1Cr18Ni9Ti | 1Cr18Ni9Ti |
| 5 | 阀杆 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 6 | 弹簧 | 50CrVA | 50CrVA包覆氟塑料 |
| 工作温度 | ≤200℃ |
| 适用介质 | YFA72W-10P适用于硝酸类介质 |
| YFA72W-10R适用于醋酸类介质 |
真空负压安全阀外形尺寸和连接尺寸
| 公称通径 | 尺寸 | ||||||
| D | D1 | D2 | Z-?d | b | f1 | H | |
| 15 | 95 | 65 | 45 | 4-14 | 14 | 2 | 110 |
| 20 | 105 | 75 | 55 | 4-14 | 16 | 2 | 130 |
| 25 | 115 | 85 | 65 | 4-14 | 16 | 2 | 150 |
| 32 | 140 | 100 | 78 | 4-18 | 18 | 2 | 180 |
| 40 | 150 | 110 | 85 | 4-18 | 18 | 3 | 200 |
| 50 | 165 | 125 | 100 | 4-18 | 20 | 3 | 221 |
| 80 | 200 | 160 | 135 | 4-18 | 22 | 3 | 245 |
| 100 | 220 | 180 | 155 | 8-18 | 22 | 3 | 253 |
| 125 | 250 | 210 | 185 | 8-18 | 24 | 3 | 280 |
| 150 | 285 | 240 | 210 | 8-23 | 24 | 3 | 329 |
| 200 | 340 | 295 | 265 | 8-23 | 26 | 3 | 377 |
| 250 | 395 | 350 | 320 | 12-23 | 28 | 3 | 440 |