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H71对夹升降式止回阀的流体阻力系数、流量用开启压力
| 公称通径 | 阀门全开启时的流体阻力系数ζ | 常温下阀门全开启时的水流量系数 | 流体的流向 | |||||
| DN | NPS | Kv（m3/h） | CV（U.S） | CV（U.K） | ↑ | ↓ | → | |
| 开启压力近似的值KPa | ||||||||
| 15 | 1/2 | 6.4 | 2.6 | 3.0 | 2.5 | 3 | 2 | 2.5 |
| 20 | 3/4 | 5.1 | 6.4 | 7.5 | 6.3 | 3 | 2 | 2.5 |
| 25 | 1 | 4.1 | 12.6 | 14.8 | 12.3 | 3 | 2 | 2.5 |
| 32 | 11/4 | 4.1 | 19.7 | 23.1 | 19.3 | 3 | 2 | 2.5 |
| 40 | 11/2 | 3.8 | 29.5 | 34.5 | 28.9 | 3 | 2 | 2.5 |
| 50 | 2 | 3.5 | 54.6 | 63.9 | 53.5 | 3 | 2 | 2.5 |
| 65 | 21/2 | 3.5 | 85.4 | 99.9 | 83.7 | 3 | 2 | 2.5 |
| 80 | 3 | 3.2 | 128 | 150 | 125 | 3 | 2 | 2.5 |
| 100 | 4 | 2.8 | 244 | 286 | 249 | 3 | 2 | 2.5 |
| 125 | 5 | 2.9 | 375 | 439 | 368 | 3 | 1 | 2.2 |
| 150 | 6 | 3.1 | 522 | 611 | 512 | 3 | 1 | 2.2 |
| 200 | 8 | 3.2 | 915 | 1070 | 897 | 3 | 1 | 2.2 |
| 配管法兰 | 公称压力 | 常规产品型号 | ||||||
| JB/T74～90、GB/T9112～9124、HG20592～20614 | PN1.0MPa | H71H-10C | H71W-10P | H71W-10P8 | H71W-10P3 | H71W-10R | H71W-10R8 | H71W-10R3 |
| PN1.6MPa | H71H-16C | H71W-16P | H71W-16P8 | H71W-16P3 | H71W-16R | H71W-16R8 | H71W-16R3 | |
| PN2.5MPa | H71H-25 | H71W-25P | H71W-25P8 | H71W-25P3 | H71W-25R | H71W-25R8 | H71W-25R3 | |
| PN4.0MPa | H71H-40C | H71W-40P | H71W-40P8 | H71W-40P3 | H71W-40R | H71W-40R8 | H71W-40R3 | |
| PN6.3MPa | H71H-63 | H71W-63P | H71W-63P8 | H71W-63P3 | H71W-63R | H71W-63R8 | H71W-63R3 | |
| PN10.0MPa | H71H-100 | H71W-100P | H71W-100P8 | H71W-100P3 | H71W-100R | H71W-100R8 | H71W-100R3 | |
| PN16.0MPa | H71H-160 | H71W-160P | H71W-160P8 | H71W-160P3 | H71W-160R | H71W-160R8 | H71W-160R3 | |
| GB/T9112～9124、HG20615～20635、SH3406 | PN2.0MPa | H71H-20C | — | H71W-20P8 | H71W-20P3 | — | H71W-20R8 | H71W-20R3 |
| PN5.0MPa | H71H-50 | — | H71W-50P8 | H71W-50P3 | — | H71W-50R8 | H71W-50R3 | |
| PN11.0MPa | H71H-110 | — | H71W-110P8 | H71W-110P3 | — | H71W-110R8 | H71W-110R3 | |
| PN15.0MPa | H71H-150 | — | H71W-150P8 | H71W-150P3 | — | H71W-150R8 | H71W-150R3 | |
| ANSIB16.5 | Class150 | H71H-A1C | — | H71W-A1P8 | H71W-A1P3 | — | H71W-A1R8 | H71W-A1R3 |
| Class300 | H71H-A3 | — | H71W-A3P8 | H71W-A3P3 | — | H71W-A3R8 | H71W-A3R3 | |
| Class600 | H71H-A6 | — | H71W-A6P8 | H71W-A6P3 | — | H71W-A6R8 | H71W-A6R3 | |
| Class900 | H71H-A9 | — | H71W-A9P8 | H71W-A9P3 | — | H71W-A9R8 | H71W-A9R3 | |
| 主要零件材料 | 阀体 | WCB（A105） | ZG1Cr18Ni9Ti | CF8（304） | CF8（304L） | ZG1Cr18Ni12Mo2Ti | CF8M（316） | CF3M（316L） |
| 阀瓣 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni9 | 00Cr19Ni10 | 1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2 | 00Cr17Ni12Mo2 | |
| 压圈 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni9 | 00Cr19Ni10 | 1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2 | 00Cr17Ni12Mo2 | |
| 弹簧 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 | 00Cr19Ni10 | 01Cr17Ni12Mo2 | 0Cr17Ni12Mo2 | 00Cr17Ni12Mo2 | |
| 适用工况 | 适用介质 | 水、蒸气、油品等 | 硝酸等腐蚀性介质 | 强氧化性介质 | 醋酸等腐蚀性介质 | 尿素等腐蚀性介质 | ||
| 适用温度（℃） | -29～425 | -196～540 | -196～425 | -196～540 | -196～455 | |||
| 注:本表为常规对夹式止回阀的型号编制、主要零件材料及适用工况,其他要求及其型号编制参见对夹止回阀型号编制方法. | ||||||||
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