译文：
对夹式止回阀的通途 止回阀安装在管路系统，其主要作用是防止介质倒流，止回阀是一种依靠介质压力开启和关闭的自动阀门。对夹式止回阀适用于公称压力PN1.0MPa~42.0MPa、Class150~25000;公称通径DN15~1200mm、NPS1/2~48;工作温度-196~540℃的各种管路上，用于防止介质倒流。通过选用不同的材质，可适用于水、蒸汽、油品、硝酸、醋酸、强氧化性介质及尿酸等多种介质。 对夹式止回阀的主要材质： 有碳钢、低温钢、双相钢（F51/F55）、钛合金、铝青铜、因科镍尔（INCONEL）、SS304、SS304L、SS316、SS316L、铬钼钢、蒙乃尔（400/500）、20#合金、哈氏合金等金属材料。 对夹式止回阀的标准与规范 1、设计与制造：API594、API6D、JB/T8937 2、结构长度：API594、API6D、DIN3202、JB/T8937 3、压力、温度等级：ANSI B16.34、DIN2401、GB/T9124、HG20604、HG20625、SH3406、JB/T74 4、试验与检验：API598、JB/T9092 5、配管法兰：JB/T74~90、GB/T9112-9124、HG20592~20635、SH3406、ANSI B 16.5、DIN2543-2548、GB/T13402、API605、ASMEB16.47 对夹止回阀的结构特点 1、结构长度短，其结构长度只有传统法兰止回阀的1/4~1/8 2、体积小、重量轻，其重量只有传统法兰止回阀的1/4~1/20 3、阀瓣关闭快速，水锤压力小 4、水平管道或垂直管道均可使用，安装方便 5、流道通畅、流体阻力小 6、动作灵敏、密封性能好 7、阀瓣行程短、关闭冲击力小 8、整体结构简单紧凑、造型美观 9、使用寿命长、性能可靠

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原文：
Thoroughfare on the clip-on valve Check valve installed in the piping system, its main role is to prevent the media turn the clock back on medium pressure valve is a kind of automatic opening and closing the valve. Pairs of clip-on valve for nominal pressure PN1.0MPa ~ 42.0MPa, Class150 ~ 25000; Nominal diameter DN15 ~ 1200mm, NPS1 / 2 ~ 48; operating temperature range -196 ~ 540 ℃ on the pipe is used to prevent medium back. Through the use of different materials, applicable to water, steam, oil, nitric acid, acetic acid, strong oxidizing medium and uric acid and other media. Wafer Check Valve The main material: There are carbon steel, low temperature steel, dual-phase steel (F51/F55), titanium alloys, aluminum bronze, Inconel Fall (INCONEL), SS304, SS304L, SS316, SS316L, chromium molybdenum steel, Monel (400/500), 20 # alloy, Hastelloy and other metal materials. Pairs of clip-type check valve standards and specifications 1, design and manufacture: API594, API6D, JB/T8937 2, the structure length: API594, API6D, DIN3202, JB/T8937 3, pressure, temperature rating: ANSI B16.34, DIN2401, GB/T9124, HG20604, HG20625, SH3406, JB/T74 4, testing and inspection: API598, JB/T9092 5, with flange: JB/T74 ~ 90, GB/T9112-9124, HG20592 ~ 20635, SH3406, ANSI B 16.5, DIN2543-2548, GB/T13402, API605, ASMEB16.47 The structural characteristics of the valve clip 1, the structure length of the short length of its structure is only the traditional flange check valve 1 / 4 to 1 / 8 2, small size, light weight, its weight is only the traditional flange check valve 1 / 4 to 1 / 20 3, valve valve quickly, the water hammer pressure of small 4, horizontal or vertical pipe pipes can be used, easy installation 5, flow channel smooth, fluid resistance 6, motion sensitive, good sealing performance 7, valve flap travel is short, close the impact of small 8, the overall structure simple and compact, beautiful shape 9, long life and reliable performance