译文：
逻辑阀的选型窍门： 　　1、在选用逻辑阀时，应根据系统所需的流量，大于或等于200l/min时选用二通插装阀，小于20l/min则选用螺纹插装式逻辑阀。插装组件的阀芯有带尾部和不带尾部形式，带尾部的有缓冲和节流等作用。阀芯还有多种面积比可供选择，弹簧也有多种刚度可供选择，从而实现多种开启压力。 　　 2、国内有的插装组件在阀芯和阀套之间装有O形圈，这样能确保密封，但反应速度慢。控制盖板和阀芯中的阻尼孔有多种直径，阻尼孔大反应速度快，但冲击大，阻尼孔小则反之。如果逻辑阀的动作有先后会影响系统的功能时，在选择阻尼孔的直径时，应特别慎重。控制盖板的型号很多，应根据系统情况仔细选择。 　　3、设计阀块时应画上盖板的定位孔，并标明各个油口的代号，以便装配和维修。应根据系统的流量和压力及其流量-压力曲线选型，过小往往会造成系统压力损失太大，使系统发热，若选型过大，则会使系统庞大，造成经济上的浪费。 　　4、逻辑阀有二种密封材料可选，氟橡胶密封适用于磷酸脂介质，丁腈橡胶密封适用于矿物油介质。 　　5、逻辑阀由于其高压大流量的特点特别适用于阀门快速液压驱动装置，在国内外都有成熟的逻辑阀产品，其在阀门快速液压驱动装置的应用前景是广阔的。

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原文：
Logic valve selection tips: 1, in the selection of logic valve should be required according to the system flow is greater than or equal to 200l/min use the cartridge when the valve is used less than 20l/min threaded cartridge valve logic. Components of the valve plug with tail and without a tail forms, with the tail of a buffer, and the role of savings and so on. There are a variety of spool area ratio available, there are a variety of spring stiffness to choose from, in order to achieve a variety of open pressure. 2, domestic and some components in the spool and cartridge valves with O-ring between sets, this can be tightly sealed, but the reaction is slow. Cover and spool control orifice in a variety of diameters, orifice large, fast response, but the impact of large orifice small and vice versa. If the logic valve movements are successively affect the system function, the choice of orifice diameter should be especially careful. Models cover a lot of control, the situation should be carefully selected according to the system. 3, the design should be drawn on the block valve cover positioning holes, and marked all the oil port of code to assembly and maintenance. Should be based on system flow and pressure and flow - pressure curve selection, too small to cause the system pressure loss is often too much heat to the system, if the selection is too large, then make huge systems, resulting in economic waste. 4, there are two kinds of logic valve sealing material optional Viton seal applied phosphate medium, nitrile rubber seal suitable for mineral oil medium. 5, the logic valve because of its high pressure and large flow characteristics suitable for rapid hydraulic valve drive device, at home and abroad are mature logic valves, valve quickly in the application of hydraulic drive prospects are bright.