4WRA6W1-07-2X/G24N9K4/V力士乐比例阀

      武汉耀泰机电设备有限公司经销著名品牌进口液压配件，经销品牌有德国力士乐（电磁阀，减压阀，溢流阀，插装阀，单向阀，压力继电器，节流阀，调速阀，叶片泵，柱塞泵），瑞士万福乐换向阀，美国威格士，意大利ATOS，美国ASCO等，产品广销各地，如广州，深圳，上海，北京，天津，沈阳，武汉，长沙，桂林，南京，宁夏，银川，哈尔滨，郑州，昆明，南昌，杭州，福州，大连，济南，南宁，克拉玛依，衡阳，肇庆，启东，泰兴，合肥，英德，晋中，青岛，荆门，十堰，黄石，唐山，成都，重庆，西安，柳州，昆明，乌鲁木齐，得到广大客户一致肯定及好评。

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。  ----理想情况下阀门现场要求。
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。---这是阀门生产商考虑的因素。
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。 ----密封件的要求。
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按介质工作温度分类
⑴ 高温阀 t >450℃的阀门。
⑵ 中温阀 120℃≤t <450℃的阀门。
⑶ 常温阀 －40℃≤t <120℃的阀门。
⑷ 低温阀 -100℃≤t <-40℃的阀门。
⑸ 超低温阀 t <－100℃的阀门。

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电磁比例换向阀（带反馈）  4WRE(E)...22...
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