译文：
1.通用要求 1.1 阀门规格及类别，应符合管道设计文件的要求。 1.2 阀门的型号应注明依据的国标编号要求。若是企业标准，应注明型号的相关说明。 1.3 阀门工作压力，要求≥管道的工作压力，在不影响价格的前提下，阀门可承受的工压应大于管道实际的工压；阀门关闭状况下的任何一侧应能承受1.1倍阀门工压值而不渗漏；阀门开启状况下，阀体应能承受二倍阀门工压的要求。 1.4 阀门制造标准，应说明依据的国标编号，若是企业标准，采购合同上应附企业文件。 2.阀门标质 2.1 阀体材质，应以球墨铸铁为主，并注明牌号及铸铁实际的物理化学检测数据。 2.2 阀杆材质，力求不锈钢阀杆(2CR13)，大口径阀门也应是不锈钢嵌包的阀杆。 2.3 螺母材质，采用铸铝黄铜或铸铝青铜，且硬度与强度均大于阀杆。 2.4 阀杆衬套材质，其硬度与强度均应不大于阀杆，且在水浸泡状况下与阀杆、阀体不形成电化学腐蚀。 2.5 密封面的材质：①阀门类别不一，密封方式及材质要求不一；②普通楔式闸阀，铜环的材质、固定方式、研磨方式均应说明；③软密封闸阀，阀板衬胶材料的物理化学及卫生检测数据；④蝶阀应标明阀体上密封面材质及蝶板上密封面材质；它们的物理化学检测数据，特别是橡胶的卫生要求、抗老化性能、耐磨性能；通常采用丁晴橡胶及三元乙丙橡胶等，严禁掺用再生胶。 2.6 阀轴填料：①由于管网中的阀门，通常是启闭不频繁的，要求填料在数年内不活动，填料亦不老化，长期保持密封效果；②阀轴填料亦应在承受频繁启闭时，密封效果的良好性；③鉴于上述要求，阀轴填料力求终身不换或十多年不更换；④填料若需更换，阀门设计应考虑能有水压的状况下更换的措施。 3.变速传动箱 3.1 箱体材质及内外防腐要求与阀体原则一致。 3.2 箱体应有密封措施，箱体组装后能承受3米水柱状况的浸泡。 3.3 箱体上的启闭限位装置，其调节螺帽应在箱体内或设在箱外，但需专用工具才可作业。 3.4 传动结构设计合理，启闭时只能带动阀轴旋转，不使其上下窜动，传动部件咬合适度，不产生带负荷启闭时分离打滑。

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原文：
1. General requirements 1.1 The specifications and types of valves, piping design documents should be consistent with requirements. 1.2 The valve should be specified based on the model national standard code requirements. If the enterprise standards, identifying types of instructions. 1.3 valve job pressure ≥ pipeline working pressure, without affecting the price of the premise, the valve can withstand the working pressure should be greater than the actual pipe work pressure; valve closing conditions of any side should be able to withstand 1.1 times the value of the valve working pressure without leakage; valve open position, the valve should be able to withstand twice the working pressure valve requirements. 1.4 valve manufacturing standards, we should explain the basis of the national standard code, if the enterprise standards, procurement contracts should be attached to business documents. 2. Valve standard quality 2.1 The body material should be ductile iron main, and indicate the grade and the actual physical and chemical testing of cast iron data. 2.2 stem material, and strive to stainless steel stem (2CR13), large diameter valves also should be embedded in the package of stainless steel valve stem. 2.3 nut material, brass or cast aluminum with cast aluminum bronze, and the hardness and strength are greater than the valve stem. 2.4 stem bushing material, its hardness and strength shall be not greater than the stem, and is immersed in water conditions and valve body is not the formation of electrochemical corrosion. 2.5 sealing surface of the material: ① different valve type, sealing method and material requirements vary; ② ordinary wedge gate valve, copper ring material, fixation, polishing should note; ③ soft sealing gate valve, valve plate rubber lining material and the health of physical and chemical test data; ④ valve sealing surface should be marked on the body sealing surface materials and butterfly board material; their physical and chemical test data, especially rubber, health requirements, aging resistance, wear performance; usually NBR and EPDM rubber, mixed with recycled rubber is strictly prohibited. 2.6 valve spindle packing: ① As the pipe network in the valves, usually do not open and close frequently, requiring the filling in a few years of inactivity, not aging filler, a long-term effects remain sealed; ② fill valve shaft should also bear the frequent Kai closed, the seal of good nature; ③ light of the above requirements, fill valve shaft does not seek to change or 10 years of life do not change; ④ Packing For replacement, the valve should be designed to have water pressure conditions change measures. 3. Variable Transmission 3.1 external enclosure materials and corrosion requirements be consistent with the body. Should be sealed box measures 3.2, cabinet assembly can withstand the 3 m water column after the state of immersion. 3.3 box on the opening and closing stopper, and the adjustment nut should be in cabinets or located in the outside box, but special tools need to be working. 3.4 Drive structural design is reasonable, open and close valves can only drive shaft rotation, so as not to traverse up and down, bite moderate transmission parts, does not produce open and close with a load when the separation skid.