A46Y、A46F型先導式安全閥
一、用途：
先導式安全泄壓閥是一種新穎結構的安全閥。主要用于石油天然氣、化工、電力、冶金和城市燃氣等領域，是受壓設備、容器或管路上的超壓保護裝置。其主要優點是變彈簧直接作用為導閥間接作用，提高了動作的靈敏度，而且主閥采用套筒活塞式，動作精度高、重復性好、回座壓力高、密封性能好、能帶高背壓排放、工作穩定可靠，可在線調校，操作維護方便。
二、主要連接尺寸：
| 公稱通徑 DN | DN' | 尺 寸 | |||
| do | L | L1 | ≈H | ||
| 25 | 32 | 15 | 110 | 95 | 355 |
| 25 | 50 | 15 | 114 | 105 | 365 |
| 32 | 40 | 20 | 115 | 105 | 382 |
| 40 | 50 | 25 | 121 | 124 | 402 |
| 50 | 65 | 32 | 135 | 120 | 428 |
| 50 | 80 | 33 | 124 | 137 | 442 |
| 65 | 80 | 40 | 160 | 140 | 455 |
| 80 | 100 | 50 | 162 | 156 | 465 |
| 100 | 125 | 65 | 205 | 160 | 485 |
| 100 | 150 | 65 | 210 | 197 | 515 |
| 150 | 200 | 100 | 241 | 240 | 632 |
| 200 | 250 | 125 | 279 | 276 | 695 |
| PN64～100 | PN160 | ||||||||||
| DN | DN' | do | L | L1 | ≈H | DN | DN' | do | L | L1 | ≈H |
| 25 | 32 | 15 | 110 | 100 | 372 | 25 | 50 | 13 | 121 | 126 | 445 |
| 25 | 50 | 15 | 114 | 111 | 385 | 40 | 50 | 16 | 140 | 149 | 460 |
| 32 | 40 | 20 | 130 | 110 | 398 | 50 | 80 | 32 | 171 | 167 | 495 |
| 40 | 50 | 25 | 121 | 124 | 410 | 80 | 100 | 48 | 181 | 191 | 515 |
| 50 | 65 | 32 | 160 | 130 | 445 | 100 | 150 | 60 | 233 | 249 | 575 |
| 50 | 80 | 32 | 124 | 137 | 458 | | | | | | |
| 65 | 80 | 40 | 175 | 160 | 485 | | | | | | |
| 80 | 100 | 50 | 162 | 162 | 496 | | | | | | |
| 100 | 125 | 65 | 195 | 195 | 520 | | | | | | |
| 100 | 150 | 65 | 210 | 197 | 538 | | | | | | |
| 150 | 200 | 100 | 241 | 246 | 638 | | | | | | |
| 200 | 250 | 125 | 279 | 297 | 715 | | | | | | |
| PN64～100 | PN160 | ||||||||||
| DN | DN' | do | L | L1 | ≈H | DN | DN' | do | L | L1 | ≈H |
| 25 | 32 | 15 | 110 | 100 | 372 | 25 | 50 | 13 | 121 | 126 | 445 |
| 25 | 50 | 15 | 114 | 111 | 385 | 40 | 50 | 16 | 140 | 149 | 460 |
| 32 | 40 | 20 | 130 | 110 | 398 | 50 | 80 | 32 | 171 | 167 | 495 |
| 40 | 50 | 25 | 121 | 124 | 410 | 80 | 100 | 48 | 181 | 191 | 515 |
| 50 | 65 | 32 | 160 | 130 | 445 | 100 | 150 | 60 | 233 | 249 | 575 |
| 50 | 80 | 32 | 124 | 137 | 458 | | | | | | |
| 65 | 80 | 40 | 175 | 160 | 485 | | | | | | |
| 80 | 100 | 50 | 162 | 162 | 496 | | | | | | |
| 100 | 125 | 65 | 195 | 195 | 520 | | | | | | |
| 100 | 150 | 65 | 210 | 197 | 538 | | | | | | |
| 150 | 200 | 100 | 241 | 246 | 638 | | | | | | |
| 200 | 250 | 125 | 279 | 297 | 715 | | | | | | |
