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电磁换向阀 4WE6D-6X/EG24N9K4 力士乐 

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水泵吸不上水的原因： 1、启动时水泵内未灌水或灌水不足，泵内尚有空气。此时 应停车，重新向泵内灌水，直到放气阀冒水为止。 2、底阀漏水。可能是底阀坏了，也可能是底阀的阀板与阀 座接触处被小块碎石、煤块或木块卡住，这时，可先用大锤敲击 吸水管下端振掉卡在阀座上的小块异物，如仍然不行，就应将底 阀拆下检查修理。 3、吸水口没有浸在水中或浸入水下太浅，这时只要降低吸水口，使其浸入水中一定的高层度即可，但要保证吸水高度小于水泵的允许吸上真空高度。 4、吸水管中存有空气。吸水管特别是移动式水泵的吸水管，如果安装不当就会使吸水管中存有空气，应正确安装吸水管。 5、吸水侧盘根漏气，造成泵内空气排不尽。盘根漏气的原因是盘根老化，或未浸透油，应更换合格的盘根。如盘根松散或压盖压不紧，也会漏气，这时应将压盖的螺栓螺帽拧紧到合适的程度。如果盘根箱在组装过程中忘了放水封圈，或者水封圈位置放错了，不能正对斜孔，或者斜孔被堵，使水封不起作用，这时应加装水封圈或正确安放水封圈。 河北中沃工业泵厂主营大流量单级双吸中开离心泵、混流泵、耐磨渣浆泵、电厂脱硫泵、矿用多级离心泵、压滤机入料泵、管道直联泵、不锈钢化工离心泵、泵用机械密封、柴油机水泵机组等产品，并承揽非标泵产品及其配件的设计、生产与加工，水处理工程设计。信誉第，质量保证，交货迅速。欢迎各届朋友前来洽谈业务。 双吸泵中密封环的型式有单环式、双环式和迷宫式。其中，迷宫式密封环的水流回流阻力，减漏效果好，但构造复杂，制造和安装要求高。在常用的双吸泵中单环式密封环中，又可分为平直式和端面式两种。平直式密封环主要靠径向间隙密封；端面式密封环主要靠轴向间隙密封。端面式密封环中的水流沿径向流出，改善了双吸泵中叶轮进口处的流态，但因间隙较短，减漏效果不如平直式密封环。