我公司生产的美标止回阀，完全按照美国标准设计制造，结构美观、先进。
美标止回阀是指依靠介质本身流动而自动开、闭阀瓣，用来防止介质倒流的阀门，又称逆止阀、单向阀、逆流阀，其主要作用是防止介质倒流、防止泵及驱动电动机反转，以及容器介质的泄放。
Each process, each facility, and each environmental constraint has its own special requirements. Therefore, Dongyan offers a comprehensive range of products covering different performance levels, pressures, different functions and different materials.
【性能参数】
序号 | 项目名称 | 参数 | |||||
1 | 公称压力PN（MPa) | 150LB | 300LB | 600LB | 900LB | 1500LB | 2500LB |
2.0 | 5.0 | 10.0 | 15.0 | 25.0 | 42.0 | ||
2 | 壳体强度试验压力 | 常温下公称压力的1.5倍 | |||||
3 | 高压密封试验压力 | 常温下公称压力的1.1倍 | |||||
4 | 常温下工作压力 | 按ASME B16.34 压力温度额定值 | |||||
【产品规范】
设计标准 | 结构长度 | 法兰连接尺寸 | 试验与检验 | 压力与温度基准 |
API6D/ASME B16.34 | ASME B16.10 | ASME B16.5 | API598/API6D | ASME B16.34 |
【主要零件材料】
零件名称 | 材料名称 | |||||
阀体 | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
阀盖 | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
阀板 | A216 WCB | A217 WC6 | A351 CF8 | A351 CF8M | A351 CF3 | A351 CF3M |
密封面 | 13Cr/STL | STL | 本体/STL | 本体/STL | 本体/STL | 本体/STL |
阀轴 | A182 F6a | A182 F11 | A182 F304 | A182 F316 | A182 F304L | A182 F316L |
垫片 | 柔性石墨 | 柔性石墨 | 柔性石墨 | 柔性石墨 | 柔性石墨 | 柔性石墨 |
螺栓 | A193 B7 | A193 B16 | A193 B8 | A193 B8M | A193 B8 | A193 B8M |
螺母 | A194 2H | A194 4 | A194 8 | A194 8M | A194 8 | A194 8M |
使用温度 | -29~425℃ | -29~540℃ | -46~425℃ | -46~425℃ | -46~425℃ | -46~425℃ |
适用介质 | 水、蒸汽 | 水、蒸汽 | 弱腐蚀性 | 弱腐蚀性 | 弱腐蚀性 | 弱腐蚀性 |
【主要外形和连接尺寸】
公称通径 | 尺寸 | ||||||||
m | in | L | D | D1 | D2 | b | f | n-Φd | H |
H44H-150Lb | |||||||||
50 | 2 | 203 | 152 | 120.5 | 92 | 16 | 1.6 | 4-19 | 180 |
80 | 3 | 241 | 192 | 152.5 | 127 | 19 | 1.6 | 4-19 | 190 |
100 | 4 | 297 | 229 | 190.5 | 157 | 24 | 1.6 | 8-19 | 203 |
125 | 5 | 330 | 254 | 216 | 186 | 24 | 1.6 | 8-22 | 229 |
150 | 6 | 356 | 279 | 241.5 | 216 | 26 | 1.6 | 8-22 | 257 |
200 | 8 | 495 | 342 | 298.5 | 270 | 29 | 1.6 | 8-22 | 292 |
250 | 10 | 622 | 406 | 362 | 324 | 31 | 1.6 | 12-25 | 355 |
300 | 12 | 698 | 483 | 432 | 381 | 32 | 1.6 | 12-25 | 396 |
H44H-300Lb | |||||||||
50 | 2 | 267 | 165 | 127 | 92 | 23 | 1.6 | 8-19 | 178 |
80 | 3 | 318 | 210 | 168.5 | 127 | 29 | 1.6 | 8-22 | 216 |
100 | 4 | 356 | 254 | 200 | 157 | 32 | 1.6 | 8-22 | 241 |
125 | 5 | 400 | 279 | 235 | 186 | 35 | 1.6 | 8-22 | 267 |
150 | 6 | 444 | 318 | 270 | 216 | 37 | 1.6 | 12-22 | 305 |
200 | 8 | 533 | 381 | 330 | 270 | 42 | 1.6 | 12-25 | 368 |
250 | 10 | 622 | 445 | 387 | 324 | 48 | 1.6 | 16-29 | 394 |
300 | 12 | 711 | 521 | 451 | 381 | 51 | 1.6 | 16-32 | 445 |
H44H-600Lb | |||||||||
50 | 2 | 295 | 165 | 127 | 92 | 33 | 6.4 | 8-19 | 203 |
80 | 3 | 359 | 210 | 168 | 127 | 36 | 6.4 | 8-22 | 235 |
100 | 4 | 435 | 273 | 216 | 157 | 45 | 6.4 | 8-25 | 286 |
125 | 5 | 511 | 330 | 266.5 | 186 | 52 | 6.4 | 8-29 | 292 |
150 | 6 | 562 | 356 | 292 | 216 | 55 | 6.4 | 12-29 | 330 |
200 | 8 | 664 | 419 | 349 | 270 | 63 | 6.4 | 12-32 | 381 |
250 | 10 | 791 | 510 | 432 | 324 | 71 | 6.4 | 16-35 | 457 |
300 | 12 | 842 | 559 | 489 | 381 | 74 | 6.4 | 20-35 | 584 |
【结构图片】
These devices are suitable for accurately controlling media such as gases, liquids, steam, etc., and maintaining process parameters such as pressure, flow rate, temperature, and liquid level at given values. Especially suitable for work environments where the allowable pressure difference is small and the allowable leakage is also small, and the pressure difference is not significant.
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