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派克针形阀的防腐方法：首先阀体的防腐蚀主要是正确选用材料。虽然防腐蚀的资料十分丰富但能否选得恰当还是不容易的事情因为腐蚀的问题很复杂。选择阀体材料的难处还在于不能只考虑腐蚀问题同时必须考虑耐压耐温能力经济上是否合理，购买是否容易等因素

力经济上是否合理购买是否容易等因素。</p></div>
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我司威斯特（上海）传感器仪表有限公司主营欧美进口产品，在德国，美国都有分公司，因此很多产品都有很好的渠道，我公司优势主打产品美国（PARKER）派克、德国GSR、德国博世力士乐（BOSCH-REXROTH）、德国宝德Burkert、德国Balluff、意大利Eltra、瑞士博力谋Belimo、美国posi-flate、美国Banner、美国纽曼蒂克numatics</p></div>
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它的工作原理与直动式溢流阀相似，区别在于二次油路即出口压力p2不接回油箱，而接通某个执行元件，因此泄露回油口L必须单独接回油箱；为了减少调压外空弹簧的刚度，设置了控制柱塞A。 将该阀下盖转过90&#176;，并打开螺堵K，则变成外控顺序阀。对于外控顺序阀，当一次油路压力P1达到顺序阀的设定压力之前，阀一直关闭，一旦达到设定压力，阀便开启，压力油进入二次油路，去驱动另一个</p></div>
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PARKER派克电磁阀里有密闭的腔，在不同位置开有通孔，每个孔连接不同的油管，腔中间是活塞，两面是两块电磁铁，哪面的磁铁线圈通电阀体就会被吸引到哪边，通过控制阀体的移动来开启或关闭不同的排油孔，而进油孔是常开的，液压油就会进入不同的排油管，然后通过油的压力来推动油缸的活塞，活塞又带动活塞杆，活塞杆带动机械装置。这样通过控制电磁铁的电流通断就控制。</p></div>
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DFL系列比例方向控制阀，集成为基础的微处理器开环运动分析器。阀门直接接收电子开关逻辑信号/触发简单的运动控制驱动器的速度剖面，加速和减速。特征：基于微处理器的集成电子阀，板上开环运动控制分析器，用户可选择的操作模式：缓慢的变化或探查，测试点显示速度和坡道的设置，发光功能的诊断指标。D1FH系列比例方向控制阀是一种高性能，二阶段的先导与电子阀芯位置反馈电磁阀。</p></div>
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