推荐回答（3个）
气动控制阀和液压阀的区别
(一) 使用的能源不同
气动元件和装置可采用空压站集中供气的方法，根据使用要求和控制点的不同来调节各自减压阀的工作压力。液压阀都设有回油管路，便于油箱收集用过的液压油。气动控制阀
以通过排气口直接把压缩空气向大气排放。
(二) 对泄漏的要求不同
液压阀对向外的泄漏要求严格，而对元件内部的少量泄漏却是允许的。对气动控制阀来说，除间隙密封的阀外，原则上不允许内部泄漏。气动阀的内部泄漏有导致事故的危险
对气动管道来说，允许有少许泄漏;而液压管道的泄漏将造成系统压力下降和对环境的污染。
(三) 对润滑的要求不同
液压系统的工作介质为液压油，液压阀不存在对润滑的要求;气动系统的工作介质为空气，空气无润滑性，因此许多气动阀需要油雾润滑。阀的零件应选择不易受水腐蚀的材料，或者采取必要的防锈措施。
(四) 压力范围不同
气动阀的工作压力范围比液压阀低。气动阀的工作压力通常为10bar以内，少数可达到40bar以内。但液压阀的工作压力都很高(通常在50Mpa以内)。若气动阀在超过最高容许压力下使用。往往会发生严重事故。
(五) 使用特点不同
一般气动阀比液压阀结构紧凑、重量轻，易于集成安装，阀的工作频率高、使用寿命长。气动阀正向低功率、小型化方向发展，已出现功率只有0.5W的低功率电磁阀。可与微机和PLC可编程控制器直接连接，也可与电子器件一起安装在印刷线路板上，通过标准板接通气电回路，省却了大量配线，适用于气动工业机械手、复杂的生产制造装配线等场合。
气动阀是个大范围，气控阀隶属于气动阀的一种。气动阀包括电磁阀和气动阀两种，顾名思义，电磁阀是得电之后在线圈部分产生磁场吸动可动铁，使其阀芯换向。气动阀一般用于要求较高的地方，避免电火花之类也就是防火防电导致危险的场地，所以采用气控制，替代电控制。
希望能帮到你~~
气动阀门主要是由气源进入气缸两活塞之间中腔时，使两活塞分离向气缸两端方向移动，两端气腔的空气通过另一气口排出，同时使两活塞齿条同步带动输出轴(齿轮)逆时针方向旋转。使阀门开关与关闭
电动阀门通过电源控制阀体，液动阀门通过液压油道理同上。
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