D91FBE01HC4NF00派克比例阀
美国PARKER比例阀
宁波思承流体技术有限公司特价供应派克PARKER先导比例阀D91FBE01HC4NF00现货2台，期货6-8周，主要应用于钢厂电炉上，最大流量为75L/min，输入电压信号0...±10V，相配套的派克柱塞泵是PAVC654213现货5台，可以进行重复性的速度控制，并实现平稳地加速和减速。QQ变更：3004623314
Parker的比例换向阀使用方式
现在的Parker派克比例换向阀用的都是电-液比例复合控制。
首先，比例阀必须有一个配套的放大器，它接受来自于计算机，或者PLC，或者电位器(滑动变阻器)的控制信号，把0-20毫安微弱的信号放大到0-800毫安。计算机的信号太弱了。
然后，派克放大器把放大的信号传送到电磁阀，电磁阀依据传来的信号大小，克服弹簧力，调节推杆的行程，输出流量大约1升/分钟,压力随信号变化的控制油。
再后，控制油到达主阀芯的两端，依据不同的压力，推动阀芯移动相应的行程，因为阀芯本身有锥度的台阶，与阀体组合，不同的行程得到不同的过流面积，再入口压力稳定的情况下，得到不同的流量。最终实现比例功能。
比例阀是由计算机(或其他)，放大器，比例电磁铁，锥度台阶的阀芯，入口压力补偿阀(单联可以不要)，梭阀，内置卸荷阀(把多余的流量送回油箱)等构成的一个完整的体系。才能真正实现比例功能。
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D91FBE01HC4NF00派克比例阀特价现货
