A44Y、A48Y適用于工作溫度≤350℃的蒸汽、空氣等介質的設備或管路上。作為超壓保護裝置。適用于工作溫度≤350℃的蒸汽、空氣等介質的設備或管路上。作為超壓保護裝置。是一種由進口靜壓開啟的自動泄壓防護裝置,它是壓力容器zui為重要的安全附件之一,它的功能是：當容器內壓力超過某一定值時,依靠介質自身的壓力自動開啟閥門,迅速排出一定數量的介質。當容器內的壓力降到允許值時,閥又自動關閉,使容器內壓力始終低于允許壓力的上限,自動防止因超壓而可能出現的事故,所以安全閥又被稱為壓力容器的zui終保護裝置。 主要零部件材料: NO | 零件名稱 | 材料 | 1 | 閥體 | WCB | 2 | 閥座 | ZG2Cr13 | 3 | 調節圈 | ZG2Cr13 | 4 | 閥瓣 | 2Cr13 | 5 | 導向套 | 2Cr13 | 6 | 閥蓋 | ZG230-450 | 7 | 彈簧 | 50CrVA | 8 | 閥桿 | 2Cr13 | 9 | 扳手 | ZG200-400 | 10 | 調整螺桿 | 45 | 11 | 保護罩 | ZG200-400 |
| 密封面材料 | "H"堆焊D507,"Y"堆焊Co基硬質合金 |
主要連接尺寸 型號 | 公稱通徑 | do | D | K | g | g1 | b | f | f1 | Z-?d | f | L | L1 | H | A48Y-16C A44Y-16C A44Y-16P A44Y-16R | 20 | 15 | 105 | 75 |
| 55 | 16 | 2 |
| 4-14 | 2 | 110 | 95 | 411 | 25 | 16 | 115 | 85 |
| 65 | 16 | 2 |
| 4-14 | 2 | 110 | 95 | 411 | 32 | 20 | 140 | 100 |
| 78 | 18 | 2 |
| 4-18 | 3 | 115 | 100 | 411 | 40 | 25 | 150 | 110 |
| 85 | 18 | 3 |
| 4-18 | 3 | 120 | 110 | 472 | 50 | 32 | 165 | 125 |
| 100 | 20 | 3 |
| 4-18 | 3 | 135 | 120 | 532 | 65 | 40 | 185 | 145 |
| 120 | 20 | 3 |
| 4-18 | 3 | 160 | 140 | 556 | 80 | 50 | 200 | 160 |
| 135 | 20 | 3 |
| 8-18 | 3 | 170 | 135 | 561 | 100 | 65 | 220 | 180 |
| 155 | 20 | 3 |
| 8-18 | 3 | 195 | 175 | 667 | 125 | 80 | 250 | 210 |
| 185 | 22 | 3 |
| 8-18 | 3 | 210 | 190 | 857 | 150 | 100 | 285 | 240 |
| 210 | 24 | 3 |
| 8-23 | 3 | 255 | 230 | 915 | 200 | 125 | 340 | 295 |
| 265 | 26 | 3 |
| 12-23 | 3 | 300 | 260 | 1073 | 250 | 150 | 405 | 355 |
| 320 | 30 | 3 |
| 12-26 | 4 | 350 | 320 | 1307 | 300 | 220 | 460 | 410 |
| 375 | 30 | 4 |
| 12-26 | 4 | 370 | 350 | 1233 | 350 | 250 | 520 | 470 |
| 435 | 34 | 4 |
| 16-26 | 4 | 500 | 450 | 1711 | 400 | 280 | 580 | 525 |
| 485 | 36 | 4 |
| 16-30 | 4 | 500 | 450 | 1780 | A48Y-25
A44Y-25
A44Y-25P A44Y-25R | 20 | 15 | 105 | 75 |
| 55 | 16 | 2 |
| 4-14 | 2 | 110 | 95 | 411 | 25 | 16 | 115 | 85 |
| 65 | 16 | 2 |
| 4-14 | 2 | 110 | 95 | 411 | 32 | 20 | 140 | 100 |
| 78 | 18 | 2 |
| 4-18 | 3 | 115 | 100 | 411 | 40 | 25 | 150 | 110 |
| 85 | 18 | 3 |
| 4-18 | 3 | 120 | 110 | 472 | 50 | 32 | 165 | 125 |
| 100 | 20 | 3 |
| 4-18 | 3 | 135 | 120 | 532 | 65 | 40 | 185 | 145 |
| 120 | 22 | 3 |
| 8-18 | 3 | 160 | 140 | 556 | 80 | 50 | 200 | 160 |
| 135 | 22 | 3 |
| 8-18 | 3 | 170 | 135 | 561 | 100 | 65 | 230 | 190 |
| 160 | 24 | 3 |
| 8-23 | 3 | 195 | 175 | 667 | 125 | 80 | 270 | 220 |
| 188 | 28 | 3 |
| 8-26 | 3 | 210 | 190 | 857 | 150 | 100 | 300 | 250 |
| 218 | 30 | 3 |
| 8-26 | 3 | 255 | 230 | 915 | 200 | 125 | 360 | 310 |
| 278 | 34 | 3 |
| 12-26 | 3 | 300 | 260 | 1073 | 250 | 150 | 425 | 370 |
| 332 | 36 | 3 |
| 12-30 | 4 | 350 | 320 | 1307 | 300 | 220 | 485 | 430 |
| 390 | 40 | 4 |
| 16-30 | 4 | 370 | 350 | 1233 | 350 | 250 | 555 | 490 |
| 448 | 44 | 4 |
| 16-34 | 4 | 500 | 450 | 1711 | 400 | 280 | 620 | 550 |
| 505 | 48 | 4 |
| 16-36 | 4 | 500 | 450 | 1780 |
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