Ax46F先導式安全閥（豐泉牌）
先導式安全泄壓閥是一種新穎結構的安全閥。
先導式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(yōu)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，雙重密封閥座結構，動作精度高、重復性好、回座快、不泄漏、能帶高背壓排放、工作等命長、工作穩(wěn)定可靠，它還可在線調校，反復啟跳排放后，仍然能自動回座，關閉嚴密，操作維護方便。
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| | RKA×46F（Y）結構圖 |
（K）Ax46F（Y）、AF46Y型主要零部件材料
| NO. | 零件名稱 | RAx46Y/F 材料 | RKAX46Y/F材料 |
| 1 | 閥體 | WCB | WCB |
| 2 | 閥瓣 | 2Cr13/2Cr13+PTFE | 1Cr18Ni9Ti/1Cr18Ni9Ti+PTFE |
| 3 | 導向套 | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
| 4 | 彈簧 | 50CrVA | 50CrVA |
| 5 | O型圈 | 氟橡膠 | 氟橡膠 |
| 6 | 閥蓋 | 25 | 25 |
| 7 | 導閥 | 部件 |
（K）Ax46F（Y）、AF46Y型先導式安全閥外形尺寸和連接尺寸
| 型號 | 公稱通徑 | do | L | L1 | L2 | H | DN'' | D | D1 | D2 | D6 | b | Z-?d | D'' | D1'' | D2'' | D6'' | b'' | Z''-?d'' |
| RAF46Y-16 | 25 | 15 | 110 | 95 | 150 | 365 | 32 | 115 | 85 | 65 | | 16 | 4-14 | 140 | 100 | 78 | | 18 | 4-18 |
| 32 | 20 | 115 | 100 | 150 | 375 | 40 | 140 | 100 | 78 | | 18 | 4-18 | 150 | 110 | 85 | | 18 | 4-18 |
| 40 | 25 | 120 | 110 | 160 | 390 | 50 | 150 | 110 | 85 | | 18 | 4-18 | 165 | 125 | 100 | | 20 | 4-18 |
| 50 | 32 | 135 | 120 | 160 | 410 | 65 | 165 | 125 | 100 | | 20 | 4-18 | 185 | 145 | 120 | | 20 | 4-18 |
| 65 | 40 | 160 | 140 | 175 | 435 | 80 | 185 | 145 | 120 | | 20 | 4-18 | 200 | 160 | 135 | | 20 | 8-18 |
| 80 | 50 | 170 | 135 | 175 | 451 | 100 | 200 | 160 | 135 | | 20 | 8-18 | 220 | 180 | 155 | | 22 | 8-18 |
| 100 | 65 | 195 | 175 | 195 | 500 | 125 | 220 | 180 | 155 | | 22 | 8-18 | 250 | 210 | 185 | | 24 | 8-18 |
| 125 | 80 | 210 | 190 | 220 | 526 | 150 | 250 | 210 | 185 | | 22 | 8-18 | 285 | 240 | 210 | | 24 | 8-23 |
| 150 | 100 | 255 | 230 | 265 | 623 | 175 | 285 | 240 | 210 | | 24 | 8-23 | 315 | 270 | 240 | | 26 | 8-23 |
| 200 | 125 | 300 | 260 | 300 | 690 | 250 | 340 | 295 | 265 | | 26 | 12-23 | 405 | 355 | 320 | | 30 | 12-26 |
| RAF46Y-25 | 25 | 15 | 110 | 95 | 150 | 365 | 32 | 115 | 85 | 65 | | 16 | 4-14 | 140 | 100 | 78 | | 18 | 4-18 |
| 32 | 20 | 115 | 100 | 150 | 375 | 40 | 140 | 100 | 78 | | 18 | 4-18 | 150 | 110 | 85 | | 18 | 4-18 |
| 40 | 25 | 120 | 110 | 160 | 390 | 50 | 150 | 110 | 85 | | 18 | 4-18 | 165 | 125 | 100 | | 20 | 4-18 |
| 50 | 32 | 135 | 120 | 160 | 410 | 65 | 165 | 125 | 100 | | 20 | 4-18 | 185 | 145 | 120 | | 20 | 4-18 |
| 65 | 40 | 160 | 140 | 175 | 435 | 80 | 185 | 145 | 120 | | 22 | 8-18 | 200 | 160 | 135 | | 20 | 8-18 |
| 80 | 50 | 170 | 135 | 175 | 451 | 100 | 200 | 160 | 135 | | 22 | 8-18 | 220 | 180 | 155 | | 22 | 8-18 |
| 100 | 65 | 195 | 175 | 195 | 500 | 125 | 230 | 190 | 160 | | 24 | 8-23 | 250 | 210 | 185 | | 22 | 8-18 |
| 125 | 80 | 210 | 190 | 220 | 526 | 150 | 270 | 220 | 188 | | 28 | 8-26 | 285 | 240 | 210 | | 24 | 8-23 |
| 150 | 100 | 255 | 230 | 265 | 623 | 175 | 300 | 250 | 218 | | 30 | 8-26 | 310 | 270 | 240 | | 26 | 8-23 |
| 200 | 125 | 300 | 260 | 300 | 690 | 250 | 360 | 310 | 278 | | 34 | 12-26 | 405 | 355 | 320 | | 30 | 12-26 |
| RAF46Y-40 | 25 | 15 | 110 | 95 | 150 | 365 | 32 | 115 | 85 | 65 | 58 | 16 | 4-14 | 140 | 100 | 78 | | 18 | 4-18 |
| 32 | 20 | 115 | 100 | 150 | 375 | 40 | 140 | 100 | 78 | 66 | 18 | 4-18 | 150 | 110 | 85 | | 18 | 4-18 |
| 40 | 25 | 120 | 110 | 160 | 390 | 50 | 150 | 110 | 85 | 76 | 18 | 4-18 | 165 | 125 | 100 | | 20 | 4-18 |
| 50 | 32 | 135 | 120 | 160 | 410 | 65 | 165 | 125 | 100 | 88 | 20 | 4-18 | 185 | 145 | 120 | | 20 | 4-18 |
| 65 | 40 | 160 | 140 | 175 | 435 | 80 | 185 | 145 | 120 | 110 | 22 | 8-18 | 200 | 160 | 135 | | 20 | 8-18 |
| 80 | 50 | 170 | 135 | 175 | 451 | 100 | 200 | 160 | 135 | 121 | 22 | 8-18 | 220 | 180 | 155 | | 22 | 8-18 |
| 100 | 65 | 195 | 175 | 195 | 500 | 125 | 235 | 190 | 160 | 150 | 24 | 8-23 | 250 | 210 | 185 | | 22 | 8-18 |
| 125 | 80 | 210 | 190 | 220 | 526 | 150 | 270 | 220 | 188 | 176 | 28 | 8-26 | 285 | 240 | 210 | | 24 | 8-23 |
| 150 | 100 | 255 | 230 | 265 | 623 | 175 | 300 | 250 | 218 | 204 | 30 | 8-26 | 310 | 270 | 240 | | 26 | 8-23 |
| 200 | 125 | 300 | 260 | 300 | 690 | 250 | 375 | 320 | 282 | 260 | 38 | 12-30 | 405 | 355 | 320 | | 30 | 12-26 |
| RAF46Y-64 | 25 | 15 | 110 | 100 | 160 | 365 | 32 | 140 | 100 | 78 | 58 | 22 | 4-18 | 140 | 100 | 78 | 66 | 18 | 4-18 |
| 32 | 20 | 130 | 110 | 160 | 375 | 40 | 155 | 110 | 82 | 66 | 24 | 4-23 | 150 | 110 | 85 | 76 | 18 | 4-18 |
| 40 | 25 | 130 | 120 | 170 | 445 | 50 | 170 | 125 | 95 | 76 | 24 | 4-23 | 165 | 125 | 100 | 88 | 20 | 4-18 |
| 50 | 32 | 135 | 130 | 195 | 460 | 65 | 180 | 135 | 105 | 88 | 26 | 4-23 | 185 | 145 | 120 | 110 | 22 | 8-18 |
| 65 | 40 | 175 | 160 | 225 | 495 | 80 | 205 | 160 | 130 | 110 | 28 | 8-23 | 200 | 160 | 135 | 121 | 22 | 8-18 |
| 80 | 50 | 175 | 160 | 225 | 525 | 100 | 215 | 170 | 140 | 121 | 30 | 8-23 | 235 | 190 | 160 | 150 | 24 | 8-23 |
| 100 | 65 | 195 | 195 | 245 | 565 | 125 | 250 | 200 | 168 | 150 | 32 | 8-26 | 270 | 220 | 188 | 176 | 28 | 8-25 |
| 150 | 100 | 280 | 265 | 265 | 610 | 200 | 345 | 280 | 240 | 204 | 38 | 8-34 | 375 | 320 | 282 | 260 | 38 | 12-30 |
| 200 | 125 | 300 | 295 | 300 | 680 | 250 | 405 | 345 | 300 | 260 | 44 | 12-34 | 450 | 385 | 345 | 313 | 42 | 12-34 |
| RAF46Y-100 | 25 | 15 | 110 | 100 | 160 | 365 | 32 | 140 | 100 | 78 | 58 | 24 | 4-18 | 140 | 100 | 78 | 66 | 18 | 4-18 |
| 32 | 20 | 130 | 110 | 160 | 375 | 40 | 155 | 110 | 82 | 66 | 24 | 4-23 | 150 | 110 | 85 | 76 | 18 | 4-18 |
| 40 | 25 | 130 | 120 | 170 | 445 | 50 | 170 | 125 | 95 | 76 | 26 | 4-23 | 165 | 125 | 100 | 88 | 20 | 4-18 |
| 50 | 32 | 135 | 130 | 195 | 460 | 65 | 195 | 145 | 112 | 88 | 28 | 4-26 | 185 | 145 | 120 | 110 | 22 | 8-18 |
| 65 | 40 | 175 | 160 | 225 | 495 | 80 | 220 | 170 | 138 | 110 | 32 | 8-26 | 200 | 160 | 135 | 121 | 22 | 8-18 |
| 80 | 50 | 175 | 160 | 225 | 525 | 100 | 230 | 180 | 148 | 121 | 34 | 8-26 | 235 | 190 | 160 | 150 | 24 | 8-23 |
| 100 | 65 | 195 | 195 | 245 | 565 | 125 | 265 | 210 | 172 | 150 | 38 | 8-30 | 270 | 220 | 188 | 176 | 28 | 8-25 |
| 150 | 100 | 280 | 265 | 265 | 610 | 200 | 355 | 290 | 250 | 204 | 46 | 12-34 | 375 | 320 | 282 | 260 | 38 | 12-30 |
| 200 | 125 | 300 | 295 | 300 | 680 | 250 | 430 | 360 | 312 | 260 | 54 | 12-41 | 450 | 385 | 345 | 313 | 42 | 12-34 |
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