A48Y-16C彈簧全啟式安全閥（法蘭連接）
Spring loaded low lift type with lever safety valve
A48Y彈簧式蒸汽安全閥適用于工作溫度≤350℃的蒸汽、空氣等介質的設備和管路上。
連接法蘭標準PN＜6.4MPa按JB/T-94系列1。PN≥6.4MPa按JB/T-94系列2標準。
主要零部件材料
| NO. | 零件名稱 | A48Y-C A44Y-C 材料 | A44Y-P材料 | A44Y-R材料 |
| 1 | 閥體 | WCB | ZG1Cr18Ni9Ti | CF8M |
| 2 | 閥座 | 2Cr13 | 1Cr18Ni9Ti | 316 |
| 3 | 調節(jié)圈 | ZG2Cr13 | ZG1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti |
| 4 | 反沖盤 | ZG2Cr13 | ZG1Cr18Ni9Ti | 316 |
| 5 | 閥瓣 | 2Cr13 | 1Cr18Ni9Ti | 316 |
| 6 | 導向套 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti |
| 7 | 閥蓋 | ZG230-450 | ZG230-450 | ZG230-450 |
| 8 | 彈簧 | 50CrVA | 50CrVA包覆氟塑料 | 50CrVA包覆氟塑料 |
| 9 | 閥桿 | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 10 | 扳手 | ZG200-400 | ZG200-400 | ZG200-400 |
| 11 | 調整螺桿 | 45 | 2Cr13 | 2Cr13 |
| 12 | 保護罩 | ZG200-400 | ZG200-400 | 316 |
| | 密封面材料 | 堆焊Co基硬質合金 | ||
外形尺寸和連接尺寸
| 型號 | 公稱通徑 | do | D | K | g | g1 | b | f | f1 | Z-ød | DN'' | D1 | K1 | g3 | g2 | b1 | f'' | f1'' | Z1-ød1 | L | L1 | ≈H |
| A48Y-16C | 20 | 15 | 105 | 75 | | 55 | 16 | 2 | | 4-14 | 25 | 115 | 85 | | 65 | 16 | 2 | | 4-14 | 110 | 95 | 411 |
| 25 | 16 | 115 | 85 | | 65 | 16 | 2 | | 4-14 | 32 | 140 | 100 | | 78 | 18 | 2 | | 4-18 | 110 | 95 | 411 | |
| 32 | 20 | 140 | 100 | | 78 | 18 | 2 | | 4-18 | 40 | 150 | 110 | | 85 | 18 | 3 | | 4-18 | 115 | 100 | 411 | |
| 40 | 25 | 150 | 110 | | 85 | 18 | 3 | | 4-18 | 50 | 165 | 125 | | 100 | 20 | 3 | | 4-18 | 120 | 110 | 472 | |
| 50 | 32 | 165 | 125 | | 100 | 20 | 3 | | 4-18 | 65 | 185 | 145 | | 120 | 20 | 3 | | 4-18 | 135 | 120 | 532 | |
| 65 | 40 | 185 | 145 | | 120 | 20 | 3 | | 4-18 | 80 | 200 | 160 | | 135 | 20 | 3 | | 8-18 | 160 | 140 | 556 | |
| 80 | 50 | 200 | 160 | | 135 | 20 | 3 | | 8-18 | 100 | 220 | 180 | | 155 | 22 | 3 | | 8-18 | 170 | 135 | 561 | |
| 100 | 65 | 220 | 180 | | 155 | 20 | 3 | | 8-18 | 125 | 250 | 210 | | 185 | 22 | 3 | | 8-18 | 195 | 175 | 667 | |
| 125 | 80 | 250 | 210 | | 185 | 22 | 3 | | 8-18 | 150 | 285 | 240 | | 210 | 24 | 3 | | 8-23 | 210 | 190 | 857 | |
| 150 | 100 | 285 | 240 | | 210 | 24 | 3 | | 8-23 | 175 | 310 | 270 | | 240 | 26 | 3 | | 8-23 | 255 | 230 | 915 | |
| 200 | 125 | 340 | 295 | | 265 | 26 | 3 | | 12-23 | 250 | 405 | 355 | | 320 | 30 | 3 | | 12-26 | 300 | 260 | 1073 | |
| 250 | 150 | 405 | 355 | | 320 | 30 | 3 | | 12-26 | 300 | 460 | 410 | | 375 | 30 | 4 | | 12-26 | 350 | 320 | 1307 | |
| 300 | 220 | 460 | 410 | | 375 | 30 | 4 | | 12-26 | 400 | 580 | 525 | | 485 | 36 | 4 |
