原文：
            气动阀：借助压缩空气驱动的阀门。 气动阀采购时只明确规格、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气动阀制造厂家为了产品的竞争，各自均在气动阀统一设计的构思下，进行不同的创新，形成了各自的企业标准及产品个性。因此在气动阀采购时较详尽的提出技术要求，针型阀(针阀)与厂家协调取得共识，作为气动阀采购合同的附件是十分必要的。

      通用要求　　1.1气动阀规格及类别，应符合管道设计文件的要求。 　　1.2气动阀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气动阀工作压力，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；气动阀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气动阀制造标准，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。

     气动阀材质　　2.1阀体材质，应以球墨铸铁为主，仪表阀门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气动阀类别不一，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；通常采用丁腈橡胶及三元乙丙橡胶等，严禁掺用再生胶。 　　2.6阀轴填料 　　①由于管网中的气动阀，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，截止阀密封效果的良好性； 　　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，气动阀设计应考虑能有水压的状况下更换的措施。

       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，安全阀不使其上下窜动，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。

       气动阀的操作机构　　4.1气动阀操作时的启闭方向，一律应顺时针关闭。 　　4.2由于管网中的气动阀，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气动阀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气动阀启闭程度的显示盘 　　①气动阀启闭程度的刻度线，减压阀 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若气动阀埋设较深，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。

“ About Pneumatic Valve ”是由中国气动阀门网提供的阀门行业新闻，译文仅供参考。另外，中国气动阀门网还提供相关产品搜索： 气动隔膜阀、 气动调节控制阀、 气动执行器与附件、 更多气动阀门产品、 气动阀门价格、等。

译文：
             Pneumatic valve: use of compressed air-driven valves. Only clear when the pneumatic valve procurement specifications, type, working pressure to meet the procurement requirements of the practice, in the current environment of market economy is incomplete because the pneumatic valve manufacturer for the product competition, each design are unified in the pneumatic valve under the concept of for different innovations, formed their own company standards and product personality. Therefore, pneumatic valve CHECK VALVESprocurement made a more detailed technical requirements, coordinating with manufacturers to reach a consensus, as the pneumatic valve procurement annex to the contract is necessary. General requirements 1.1 The specifications and types of pneumatic valves, piping design documents should be consistent with the requirements. 1.2 Pneumatic valves should be specified based on the model national standard code requirements. If the enterprise standards, identifying types of instructions. 1.3 Pneumatic valve working 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; pneumatic 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 Pneumatic valve manufacturing standards, we should explain the basis of national standard number, if the enterprise standards, procurement contracts should be attached to business documents. Pneumatic Valve Material 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 inBUTTERFLY VALVES water conditions and valve body is not the formation of electrochemical corrosion. 2.5 sealing surface of the material ① different type of pneumatic valve, sealing methods and materials requirements vary; ② ordinary wedge gate valve, copper ring material, a fixed way, polishing should note; ③ soft sealing gate valve, valve BALL VALVESplate rubber lining materials, physical chemistry and hygiene inspection data; ④ valve sealing surface should be marked on the body sealing surface materials and butterfly board material; their physical and chemical test data, in particular, rubber sanitary requirements, anti-aging properties, wear resistance; usually nitrile rubber and ternary B propylene rubber, etc., is strictly prohibited mixed with recycled rubber. 2.6 valve spindle packing ① As the pipe network in the pneumatic valve, normally open and close do not frequent, 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 opening and closing, the sealing effect of the good nature; ③ In view of the above requirements, fill valve shaft does not seek to change or 10 years of life do not change; ④ For replacement of packing, pneumatic valve design should be considered to have water pressure conditions change measures. Variable Speed Transmission 3.1 external enclosure materials and GATE VALVEScorrosion 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. 3.5 Transmission Box Office with the valve shaft seal leak is not connected whole, otherwise the string should be a reliable anti-leakage measures. 3.6 cabinets without debris, grease should be protection gear Biting. Pneumatic valve operating mechanism 4.1 Pneumatic valve operation of opening and closing direction, all should be clockwise closing. 4.2 As the pipe network in the pneumatic valve, often manually opening and closing, opening and closing rotation should not be too much, that is, large-diameter valves should be transferred within the 200-600. 4.3 In order to facilitate opening and closing operation of a person, in the plumbing pressure conditions, the maximum torque should open and close to 240N-m. 4.4 Pneumatic valve opening and closing operation should end mortise and tenon, and the size standard, and facing the ground so that people can be directly manipulated from the ground. With a wheel valve does not apply to underground pipe network. 4.5 degree of pneumatic valves open and close the display plate ① pneumatic valve opening andGLOBE VALVE closing degree of the scale line should be cast in the gearbox cover or change the direction of the display after the disc casing, all for the ground wire brush on the phosphor scale to show eye-catching; ② direct needle plate material in the case of better management of available stainless steel, or steel plate for the painting, do not use aluminum leather production; ③ direct drive needle striking, stable fixation, accurate adjustment when opening and closing, it should be to rivet lock. 4.6 If the pneumatic valve buried deeper, the operating mechanism and the display plate distance ≥ 1.5m above the ground when the pole should have added facilities, and fixed-rate stability in order to observe the people and operations from the ground. That is, opening and closing valves in pipe network operation, should not go down operations.

原文来源：http://www.1qidongfamen.com/

2010-09-01 06:56

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