译文：
阀门采购时只明确规格、类别、工压就满足采购要求的作法，在当前市场经济环境里是不完善的。因为阀门制造厂家为了产品的竞争，各自均在阀门统一设计的构思下，进行不同的创新，形成了各自的企业标准及产品个性。因此在阀门采购时较详尽的提出技术要求，与厂家协调取得共识，作为阀门采购合同的附件是十分必要的。 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。 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。 3.5变速传动箱体与阀轴密封处不可连接成无泄漏的整体，否则应有可靠的防串漏措施。 3.6箱体内无杂物，齿轮咬合部位应有润滑脂保护。 4.阀门的操作机构 4.1阀门操作时的启闭方向，一律应顺时针关闭。 4.2由于管网中的阀门，经常是人工启闭，启闭转数不宜过多，就是大口径阀门亦应在200－600转内。 4.3为了便于一个人的启闭操作，在管道工压状况下，最大启闭力矩宜为240N-m。 4.4阀门启闭操作端应为方榫，且尺寸标准化，并面向地面，以便人们从地面上可直接操作。带轮盘的阀门不适用于地下管网。 4.5阀门启闭程度的显示盘：①阀门启闭程度的刻度线，应铸造在变速箱盖上或转换方向后的显示盘的外壳上，一律面向地面，刻度线刷上荧光粉，以示醒目；②指示盘针的材质在管理较好的情况下可用不锈钢板，否则为刷漆的钢板，切勿使用铝皮制作；③指示盘针醒目，固定牢靠，一旦启闭调节准确后，应以铆钉锁定。 4.6若阀门埋设较深，操作机构及显示盘离地面距离≥1.5m时，应设有加长杆设施，且固定稳牢，以便人们从地面上观察及操作。也就是说，管网中的阀门启闭操作，不宜下井作业。 5.阀门的性能检测 5.1阀门某一规格批量制造时，应委托权威性机构进行以下性能的检测：①阀门在工压状况下的启闭力矩；②在工压状况下，能保证阀门关闭严密的连续启闭次数；③阀门在管道输水状况下的流阻系数的检测。 5.2阀门在出厂前应进行以下的检测：①阀门在开启状况下，阀体应承受阀门工压值二倍的内压检测；②阀门的关闭状况下，两侧分别承受1.1倍阀门工压值，无渗漏；但金属密封的蝶阀，渗漏值亦不大于相关要求。 6.阀门的内外防腐 6.1阀体(包括变速传动箱体)内外，首先应抛丸清砂除锈，力求静电喷涂粉状无毒环氧树脂，厚度达0.3mm以上。特大型阀门静电喷涂无毒环氧树脂有困难时，亦应刷涂、喷涂相似的无毒环氧漆。 6.2阀体内部以及阀板各个部位要求全面防腐，一方面浸泡在水中不会锈蚀，在两种金属之间不产生电化学腐蚀；二方面表面光滑使过水阻力减少。 6.3阀体内防腐的环氧树脂或油漆的卫生要求，应有相应权威机关的检测报告。化学物理性能亦应符合相关要求。 7.阀门包装运输 7.1阀门两侧应设轻质堵板固封。 7.2中、小口径阀门应以草绳捆扎，并以集装箱方式运输为宜。 7.3大口径阀门亦有简易木条框架固体包装，以免运输过程中碰损。 8.阀门的出厂说明书 阀门是设备，在出厂说明书中应标明以下相关数据：阀门规格；型号；工作压力；制造标准；阀体材质；阀杆材质；密封材质；阀轴填料材质；阀杆轴套材质；内外防腐材质；操作启动方向；转数；工压状况下启闭力矩；制造厂厂名；出厂日期；出厂编号；重量；连接法兰盘的孔径、孔数、中心孔距；以图示方式标明整体长、宽、高的控制尺寸；阀门流阻系数；有效启闭次数；阀门出厂检测的相关数据及安装、维护的注意事项等。 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。
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原文：
Valve procurement is only a clear specification, type, work pressure to meet the procurement requirements on the practice of a market economy in the current environment is not perfect. Because the valve manufacturers for products, competition, each valve were unified design concept, innovation differently, forming their own company standards and product personality. Therefore, the valve procurement made a more detailed technical requirements, coordinating with manufacturers to reach a consensus, as the valve procurement annex to the contract is very necessary. 1. General Requirements 1.1 valve size and type of pipe should be consistent with the requirements of design documents. 1.2 Valve model should be specified based on the GB number required. If the enterprise standards, should be specified models for instructions. 1.3 valve job pressure ≥ pipeline working pressure, without affecting the price under the premise of the valve can withstand the public pressure should be greater than the actual working Cast Gate, Globe, Check Valvespressure pipelines; valve closed position, or any side should be able to withstand 1.1 times the value of the valve working pressure without leakage; the valve open position, the valve should be able to withstand twice the working pressure valve requirements. 3. Speed gearbox 3.1 box and the internal and external anti-corrosion material requirements and body principles. 3.2 The cabinet should be sealed measures assembled box can withstand 3 meters on water-immersion. 3.3 Cabinet on the hoist limit devices, adjustment of nuts or cabinets should be located in boxes outside, but special tools need to be operating. 3.4 Drive structural design is reasonable, open and close valves can only be driven axis, not from top to bottom so that it ran a modest bite transmission parts, does not produce when the separation skid with a load hoisting. 3.5 Variable Speed Drive Cabinet Office with the valve shaft seal is not linked into the overall leak-free, or string should be a reliable anti-leakage measures. 3.6 cabinets without debris, the gear meshing parts of grease should be protected. 4. Valve operating mechanism 4.1 Valve operation of the hoist direction should always be clockwise closing. 4.2 As the pipe network of valves, often manual hoist, hoist a few should not be too much to switch, that is, large-diameter valves should also be within the 200-600 turn. 4.3 In order to facilitate a person's open and close operation, pressure conditions in the plumber, the biggest might be desirable for hoisting torque 240N-m. 4.4 The valve should open and close operation of client side tenon, and the size of standardization, and facing the ground so that people can be directly manipulated from the ground. With forged Gate, Globe, Check Valvesa wheel valve does not apply to underground pipe network. 4.5 degree of the valve open and close the display plate: ① the valve open and close degree of scale-line should be cast in the gearbox cover or change the direction of the shell plate after the show, the all facing the ground, scale wire brush on the phosphor, to show that eye-catching; ② direct dial & hand in the management of the materials available under better conditions stainless steel plate, otherwise the painting of the steel plate, not to use aluminum leather production; ③ direct dial & hand eye-catching, fixed solid, once open and close, after an accurate adjustment should be locked rivets. 4.6 If the valve buried deep, operating mechanism and display the distance ≥ 1.5m from the ground plate, the pole should have added facilities, and secure a fixed so that people from the ground observation and operation. In other words, pipe network in the valves open and close operation, should not work underground operations. 5. Valve performance testing 5.1 valve of a standard high-volume manufacturing, the authoritative body should be entrusted to make the following performance test: ① valve pressure conditions in the work of hoisting torque; ② pressure conditions in the industry can ensure the valve closes tightly continuous Kai closing times; ③ water valve in the pipeline resistance coefficient of flow conditions testing. 5.2 The valve should be carried out before leaving the factory the following test: ① the valve in the open position, the valve should withstand twice the value of the valve working pressure of the internal pressure test; ② valve closure situation, both sides were to withstand 1.1 times the the value of working pressure valve, no leakage; but metal sealed butterfly valve, leakage value is not greater than the relevant requirements. 6. Valve's internal and external corrosion 6.1 Body (including the variable speed transmission box) inside and outside, we should first shot blasting sand blasting, and strive to electrostatic spraying epoxy resin powder non-toxic, thickness of 0.3mm or more. Large non-toxic epoxy electrostatic spray valves have difficulties, they should do brushing, spraying a similar non-toxic epoxy paint. 6.2 Valve and valve plate all parts of the house for a full anti-corrosion, on the one hand immersed in water will not rust, in between the two metals does not produce the electrochemical corrosion; two areas over the water resistance of a smooth surface to decrease. 6.3 The valve body paint anti-corrosion epoxy resin or health requirements, there should be the appropriate authority of the organs of test report. Chemical physical properties should also meet the relevant requirements. 7. Valve Packing, Transport 7.1 The valve should be located on both sides of light blocking plate solid seal. 7.2, the small-caliber valve should be bundled straw, and transported in suitable containers. 7.3 The large-diameter valves are also simple framework for solid wood packaging, so as to avoid damage during transport in touch. 8. Valve factory specifications Valves are devices in the factory manual should indicate the following data: the valve specifications; model; work pressure; manufacturing standards; valve body material; stem material; sealing material; valve shaft packing material; stem sleeve material; inside and outside the anti-corrosion material; Action start direction; rpm; public pressure situations headstock moment; factory factory name; factory date; serial number; weight; connecting flange diameter, pore number, the center pitch; with graphic images indicate overall length, width and height of the control size; valve flow resistance coefficient; effectively open and close times; valve factory testing data and installation, maintenance for attention. 1.4 valve manufacturing standards, should indicate the basis of the national standard number, if the enterprise standards, procurement contracts shall be attached to business documents. 2. Valve-standard quality 2.1 The valve body material should be ductile iron-based, and indicate the actual grade and the cast iron the physical and chemical test 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 stem. 2.3 nut material, brass or cast aluminum with cast aluminum bronze, and the hardness and strength are greater than the stem. 2.4 Stem bushing material, its hardness and strength shall be not more than stem, and in the water-soaked conditions and the valve stem, valve did not form a electrochemical corrosion. 2.5 sealing surface of the material: ① different valve type, sealing methods and materials requireBall Valves different; ② Ordinary wedge gate valve, copper rings of material, fixed method, grinding method should show; ③ soft sealing gate valve, valve plate Lining Material Physical Chemistry and health testing data; ④ valve should be marked on the sealing surface of valve body materials and sealing surface material butterflies board; their physical and chemical test data, especially in rubber health requirements, anti-aging properties, wear resistance performance; usually nitrile rubber and EPDM rubber, recycled plastic mixed with strictly prohibited. 2.6 valve shaft 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, filler is not aging, long-term effects remain sealed; ② fill valve shaft should also bear the frequent Kai closed, the sealing effect of the good; ③ light of the above requirements, fill valve shaft for life does not seek to change or 10 years without replacing them; ④ For packing replacement, the valve should be designed to have a situation of pressure change measures.
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