一、H76对夹双瓣旋启式止回阀介绍
H76对夹双瓣旋启式止回阀适用于公称压力PNl.0MPa~42 0MPa、Classl50～2500;公称通径DNl5～1200mm、NPsl/2—48.工作温度一l96—540℃的各种管路上，用于防止介质剖流。内螺纹旋启式止回阀通过选用不同的材质.可适用于水、蒸汽、油品、硝酸、强氧化性介质及尿素等多种介质。
二、H76对夹双瓣旋启式止回阀的型号、材料及主要参数
| 配管法兰 | 公称压力 | 常规产品型号 | ||||||
| JB/T74～90 GB/T9112～9124 HG50592～20614 | PN1.0MPa | H76H-10C | H76W-10P | H76W-10P8 | H76W-10P3 | H76W-10R | H76W-10R8 | H76W-10R3 |
| PN1.6MPa | H76H-16C | H76W-16P | H76W-16P | H76W-16P3 | H76W-16R | H76W-16R8 | H76W-16R3 | |
| PN2.5MPa | H76H-25 | H76W-25P | H76W-25P8 | H76W-25P3 | H76W-25R | H76W-25R8 | H76W-25R3 | |
| PN4.0MPa | H76H-40 | H76W-40P | H76W-40P8 | H76W-40P3 | H76W-40R | H76W-40R8 | H76W-40R3 | |
| PN6.3MPa | H76H-63 | H76W-63P | H76W-63P8 | H76W-63P3 | H76W-63R | H76W-63R8 | H76W-63R3 | |
| PN10.0MPa | H76H-100 | H76W-100P | H76W-100P8 | H76W-100P3 | H76W-100R | H76W-100R8 | H76W-100R3 | |
| PN13.0MPa | H76H-160 | H76W-160P | H76W-160P8 | H76W-160P3 | H76W-160R | H76W-160R8 | H76W-160R3 | |
| PN20.0MPa | H76H-200 | H76W-200P | H76W-200P8 | H76W-200P3 | H76W-200R | H76W-200R8 | H76W-200R3 | |
| PN25.0MPa | H76H-250 | H76W-250P | H76W-250P8 | H76W-250P3 | H76W-250R | H76W-250R8 | H76W-250R3 | |
| GB/T9112～9124 HG20615～20635 SH3406 | PN2.0MPa | H76H-20C |
| H76W-20P8 | H76W-20P3 |
| H76W-20R8 | H76W-20R3 |
| PN5.0MPa | H76H-50 |
| H76W-50P8 | H76W-50P3 |
| H76W-50R8 | H76W-50R3 | |
| PN11.0MPa | H76H-110 |
| H76W-110P8 | H76W-110P3 |
| H76W-110R8 | H76W-110R3 | |
| PN15.0MPa | H76H-150 |
| H76W-150P8 | H76W-150P3 |
| H76W-150R8 | H76W-150R3 | |
| PN26.0MPa | H76H-260 |
| H76W-260P8 | H76W-260P3 |
| H76W-260R8 | H76W-260R3 | |
| PN42.0MPa | H76H-420 |
| H76W-420P8 | H76W-420P3 |
| H76W-420R8 | H76W-420R3 | |
|
| Class150 | H76H-A1C |
| H76W-A1P8 | H76W-A1P3 |
| H76W-A1R8 | H76W-A1R3 |
| Class300 | H76H-A3 |
| H76W-A3P8 | H76W-A3P3 |
| H76W-A3R8 | H76W-A3R3 | |
| Class600 | H76H-A6 |
| H76W-A6P8 | H76W-A6P3 |
| H76W-A6R8 | H76W-A6R3 | |
| Class900 | H76H-9 |
| H76W-9P8 | H76W-9P3 |
| H76W-9R8 | H76W-9R3 | |
| Class1500 | H76H-15 |
| H76W-15P8 | H76W-15P3 |
| H76W-15R8 | H76W-15R3 | |
| Class2500 | H76H-A25 |
| H76H-A25P8 | H76H-A25P3 |
| H76H-A25R8 | H76H-A25R3 | |
| 主要 零件 材料
| 阀体 | WCB(A105) | ZG1Cr18Ni9Ti | CFB(304) | CF3(304L) | ZG1Cr18Ni12Mo2Ti | CF8M(316) | CF3M(316M) |
| 阀擗 | CF8 | CF8 | CF8 | CF3 | CF9M | CF8M | CF3M | |
| 目轴 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni9 | 00Cr19Ni10 | ZG1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2 | 00Cr17Ni14Mo2 | |
| 弹簧 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 | 00Cr19Ni10 | 00Cr17Ni14Mo2 | 00Cr17Ni14Mo2 | 00Cr17Ni14Mo2 | |
| 适用工况 | 适用介质 | 水、蒸汽、 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式止回阀型号编制方法 | ||||||||
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