| 加工定制 |                 	是 |               	
                            	                	| 连接形式 |                 	法兰 |               	
                            	                	| 材质 |                 	碳钢 |               	
                            	                	| 阀瓣开启高度 |                 	全启式安全阀 |               	
                            	                	| 结构形式 |                 	弹簧式 |               	
                            	                	| 公称通径 |                 	DN10-DN2000(mm) |               	
                            	                	| 适用介质 |                 	蒸汽 |               	
                            	                	| 标准 |                 	国标 |               	
                            	                	| 流动方向 |                 	单向 |               	
                            	                	| 零部件及配件 |                 	配件 |               	
                            	                	| 形态 |                 	旋塞式 |               	
                            	                	| 压力环境 |                 	常压 |               	
                            	                	| 类型(通道位置) |                 	二通式 |               	
                            	                	| 阀体构造 |                 	不封闭式 |               	
                            	                	| 规格 |                 	DN50 |               	
                            	                	| 品牌 |                 	上海金盾阀门 |               	
                            	                	| 型号 |                 	A48Y |               	
                          
产品简介:
A48Y型带扳手弹簧全启式安全阀适用于工作温度≤350℃的蒸汽、空气等介质的设备和管路上。A44Y适用于工作温度≤300℃的空气、石油等介质的设备或管路上,作为超压保护装置。
连接法兰标准PN<6.4MPa按JB/T-94系列1。PN≥6.4MPa按JB/T-94系列2标准 
二、主要零部件材料
| NO. | 零件名称 | A48Y-C 材料 | A48Y-P材料 | A48Y-R材料 | 
| 1 | 阀体 | WCB | ZG1Cr18Ni9Ti | CF8M | 
| 2 | 阀座 | 2Cr13 | 1Cr18Ni9Ti | 316 | 
| 3 | 调节圈 | ZG2Cr13 | ZG1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 
| 4 | 反冲盘 | ZG2Cr13 | ZG1Cr18Ni9Ti | 316 | 
| 5 | 阀瓣 | 2Cr13 | 1Cr18Ni9Ti | 316 | 
| 6 | 导向套 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni12Mo2Ti | 
| 7 | 阀盖 | ZG230-450 | ZG230-450 | ZG230-450 | 
| 8 | 弹簧 | 50CrVA | 50CrVA包覆氟塑料 | 50CrVA包覆氟塑料 | 
| 9 | 阀杆 | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti | 
| 10 | 扳手 | ZG200-400 | ZG200-400 | ZG200-400 | 
| 11 | 调整螺杆 | 45 | 2Cr13 | 2Cr13 | 
| 12 | 保护罩 | ZG200-400 | ZG200-400 | 316 | 
|   | 密封面材料 | 堆焊Co基硬质合金 | 
三、外形尺寸和连接尺寸
| 型号 | 公称通径 | 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 |   | 16-30 | 370 | 350 | 1233 | 
| 350 | 250 | 520 | 470 |   | 435 | 34 | 4 |   | 16-26 | 500 | 715 | 650 |   | 608 | 44 | 4 |   | 20-34 | 500 | 450 | 1711 | 
| 400 | 280 | 580 | 525 |   | 485 | 36 | 4 |   | 16-30 | 500 | 715 | 650 |   | 608 | 44 | 4 |   | 20-34 | 500 | 450 | 1780 | 
| A48Y-25  | 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 | 22 | 3 |   | 8-18 | 80 | 200 | 160 |   | 135 | 20 | 3 |   | 8-18 | 160 | 140 | 556 | 
| 80 | 50 | 200 | 160 |   | 135 | 22 | 3 |   | 8-18 | 100 | 220 | 180 |   | 155 | 22 | 3 |   | 8-18 | 170 | 135 | 561 | 
| 100 | 65 | 230 | 190 |   | 160 | 24 | 3 |   | 8-23 | 125 | 250 | 210 |   | 185 | 22 | 3 |   | 8-18 | 195 | 175 | 667 | 
| 125 | 80 | 270 | 220 |   | 188 | 28 | 3 |   | 8-26 | 150 | 285 | 240 |   | 210 | 24 | 3 |   | 8-23 | 210 | 190 | 857 | 
| 150 | 100 | 300 | 250 |   | 218 | 30 | 3 |   | 8-26 | 175 | 310 | 270 |   | 240 | 26 | 3 |   | 8-23 | 255 | 230 | 915 | 
| 200 | 125 | 360 | 310 |   | 278 | 34 | 3 |   | 12-26 | 250 | 405 | 355 |   | 320 | 30 | 3 |   | 12-26 | 300 | 260 | 1073 | 
| 250 | 150 | 425 | 370 |   | 332 | 36 | 3 |   | 12-30 | 300 | 460 | 410 |   | 375 | 30 | 4 |   | 12-26 | 350 | 320 | 1307 | 
| 300 | 220 | 485 | 430 |   | 390 | 40 | 4 |   | 16-30 | 400 | 580 | 525 |   | 485 | 36 | 4 |   | 16-30 | 370 | 350 | 1233 | 
| 350 | 250 | 555 | 490 |   | 448 | 44 | 4 |   | 16-34 | 500 | 715 | 650 |   | 608 | 44 | 4 |   | 20-34 | 500 | 450 | 1711 | 
| 400 | 280 | 620 | 550 |   | 505 | 48 | 4 |   | 16-36 | 500 | 715 | 650 |   | 608 | 44 | 4 |   | 20-34 | 500 | 450 | 1780 | 
| A48Y-40 | 20 | 15 | 105 | 75 | 51 | 55 | 16 | 2 | 4 | 4-14 | 25 | 115 | 85 |   | 65 | 16 | 2 |   | 4-14 | 110 | 95 | 411 | 
| 25 | 16 | 115 | 85 | 58 | 65 | 16 | 2 | 4 | 4-14 | 32 | 140 | 100 |   | 78 | 18 | 2 |   | 4-18 | 110 | 95 | 411 | 
| 32 | 20 | 140 | 100 | 66 | 78 | 18 | 2 | 4 | 4-18 | 40 | 150 | 110 |   | 85 | 18 | 3 |   | 4-18 | 115 | 100 | 411 | 
| 40 | 25 | 150 | 110 | 76 | 85 | 18 | 3 | 4 | 4-18 | 50 | 165 | 125 |   | 100 | 20 | 3 |   | 4-18 | 120 | 110 | 472 | 
| 50 | 32 | 165 | 125 | 88 | 100 | 20 | 3 | 4 | 4-18 | 65 | 185 | 145 |   | 120 | 20 | 3 |   | 4-18 | 135 | 120 | 532 | 
| 65 | 40 | 185 | 145 | 110 | 120 | 22 | , 3 | 4 | 8-18 | 80 | 200 | 160 |   | 135 | 20 | 3 |   | 8-18 | 160 | 140 | 556 | 
| 80 | 50 | 200 | 160 | 121 | 135 | 22 | 3 | 4 | 8-18 | 100 | 220 | 180 |   | 155 | 22 | 3 |   | 8-18 | 170 | 135 | 561 | 
| 100 | 65 | 235 | 190 | 150 | 160 | 24 | 3 | 4.5 | 8-23 | 125 | 250 | 210 |   | 185 | 22 | 3 |   | 8-18 | 195 | 175 | 697 | 
| 125 | 80 | 270 | 220 | 176 | 188 | 28 | 3 | 4.5 | 8-26 | 150 | 285 | 240 |   | 210 | 24 | 3 |   | 8-23 | 210 | 190 | 857 | 
| 150 | 100 | 300 | 250 | 204 | 218 | 30 | 3 | 4.5 | 8-26 | 175 | 310 | 270 |   | 240 | 26 | 3 |   | 8-23 | 255 | 230 | 915 | 
| 200 | 125 | 375 | 320 | 260 | 282 | 38 | 3 | 4.5 | 12-30 | 250 | 405 | 355 |   | 320 | 30 | 3 |   | 12-26 | 300 | 260 | 1073 | 
| 250 | 150 | 450 | 385 | 313 | 345 | 42 | 3 | 4.5 | 12-34 | 300 | 460 | 410 |   | 375 | 30 | 4 |   | 12-26 | 350 | 320 | 1307 | 
| 300 | 220 | 515 | 450 | 364 | 408 | 46 | 4 | 4.5 | 16-34 | 400 | 580 | 525 |   | 485 | 36 | 4 |   | 16-30 | 370 | 350 | 1233 | 
| 350 | 250 | 580 | 510 | 422 | 465 | 52 | 4 | 5 | 16-36 | 500 | 715 | 650 |   | 608 | 44 | 4 |   | 20-34 | 500 | 450 | 1711 | 
| 400 | 280 | 660 | 585 | 474 | 535 | 58 | 4 | 5 | 16-41 | 500 | 715 | 650 |   | 608 | 44 | 4 |   | 20-34 | 500 | 450 | 1711 | 
| A48Y-64  | 20 | 10 | 125 | 90 | 51 | 68 | 22 | 2 | 4 | 4-18 | 25 | 115 | 85 | 58 | 65 | 16 | 2 | 4 | 4-14 | 96 | 85 | 297 | 
| 25 | 16 | 140 | 100 | 58 | 78 | 22 | 2 | 4 | 4-18 | 32 | 140 | 100 | 66 | 78 | 18 | 2 | 4 | 4-18 | 110 | 100 | 310 | 
| 32 | 20 | 155 | 110 | 66 | 82 | 24 | 2 | 4 | 4-23 | 40 | 150 | 110 | 76 | 85 | 18 | 3 | 4 | 4-18 | 130 | 110 | 322 | 
| 40 | 25 | 170 | 125 | 76 | 95 | 24 | 3 | 4 | 4-23 | 50 | 165 | 125 | 88 | 100 | 20 | 3 | 4 | 4-18 | 135 | 120 | 352 | 
| 50 | 32 | 180 | 135 | 88 | 105 | 26 | 3 | 4 | 4-23 | 65 | 185 | 145 | 110 | 120 | 22 | 3 | 4 | 8-18 | 155 | 135 | 425 | 
| 65  | 40 | 160 | 110 | 130 | 28 | 3 | 4 | 8-23 | 80 | 200 | 160 | 121 | 135 | 22 | 3 | 4 | 8-18 | 175 | 160 | 570 | 
| 80 | 50 | 215 | 170 | 121 | 140 | 30 | 3 | 4 | 8-23 | 100 | 235 | 190 | 150 | 160 | 24 | 3 | 4.5 | 8-23 | 175 | 160 | 560 | 
| 100 | 65 | 250 | 200 | 150 | 168 | 32 | 3 | 4.5 | 8-26 | 125 | 270 | 220 | 176 | 188 | 28 | 3 | 4.5 | 8-25 | 195 | 195 | 690 | 
| 150 | 100 | 345 | 280 | 204 | 240 | 38 | 3 | 4.5 | 8-34 | 200 | 375 | 320 | 260 | 282 | 38 | 3 | 4.5 | 12-30 | 280 | 265 | 935 | 
| A48Y-100 | 20 | 10 | 125 | 90 | 51 | 68 | 22 | 2 | 4 | 4-18 | 25 | 115 | 85 | 58 | 65 | 16 | 3 | 4 | 4-14 | 96 | 85 | 297 | 
| 25 | 16 | 140 | 100 | 58 | 78 | 24 | 2 | 4 | 4-18 | 32 | 140 | 100 | 66 | 78 | 18 | 2 | 4 | 4-18 | 110 | 100 | 310 | 
| 32 | 20 | 155 | 110 | 66 | 82 | 24 | 2 | 4 | 4-23 | 40 | 150 | 110 | 76 | 85 | 18 | 2 | 4 | 4-18 | 130 | 110 | 322 | 
| 40 | 25 | 170 | 125 | 76 | 95 | 26 | 3 | 4 | 4-23 | 50 | 165 | 125 | 88 | 100 | 20 | 3 | 4 | 4-18 | 135 | 120 | 352 | 
| 50 | 32 | 195 | 145 | 88 | 112 | 28 | 3 | 4 | 4-26 | 65 | 185 | 145 | 110 | 120 | 22 | 3 | 4 | 8-18 | 155 | 135 | 425 | 
| 65 | 32 | 220 | 170 | 110 | 138 | 32 | 3 | 4 | 8-26 | 80 | 200 | 160 | 121 | 135 | 22 | 3 | 4 | 8-18 | 175 | 160 | 570 | 
| 80 | 40 | 230 | 180 | 121 | 148 | 34 | 3 | 4 | 8-26 | 100 | 235 | 190 | 150 | 160 | 24 | 3 | 4.5 | 8-23 | 175 | 160 | 560 | 
| 100 | 50 | 265 | 210 | 150 | 172 | 38 | 3 | 4.5 | 8-30 | 125 | 270 | 220 | 176 | 188 | 28 | 3 | 4.5 | 8-25 | 195 | 195 | 690 | 
| 150 | 80 | 355 | 290 | 204 | 250 | 46 | 3 | 4.5 | 12-34 | 200 | 375 | 320 | 260 | 282 | 38 | 3 | 4.5 | 12-30 | 280 | 265 | 935 |