two-stage valve

Cooperation to establish a two-valve production base in the western region will be the largest and most complete production base.

两强合作建立的阀门生产基地将是西部地区规模最大、品种最全的生产基地。

FGV gate valve can be divided into the passage, full-bore type and non-reducing type two kinds.

FGV闸阀阀体的流道可分为，全通径式和缩径式两种。

Two common methods of thermal deformation compensation of the GMM ( Giant Magnetostrictive Material) actuator, the compulsive cooling methods and the thermal compensation methods, were introduced. And the structure and work principle of the GMM actuator and the nozzle flapper valve were analyzed.

介绍了GMM（超磁致伸缩材料）转换器热变形抑制的常用两种方法：冷却和补偿方法，分析了GMM转换器及喷嘴挡板阀的结构组成和工作原理。

And theoretical basis is presented to further apply nozzle-flapper valve to two-stage electro-hydraulic servo valve .

较快的响应速度;为进一步将其应用于两级 电液伺服 阀提供了设计和实验依据.

As a result of continuous testing and improvements since the inception of the True Union Ball Valve, two distinct model changes have occurred.

从开发True Union球阀以来，经过不断的测试和改进，已经形成了两种不同型号的阀门。

Empty three-position valve accommodating two, three or four ports.

排空三个位置的放气阀,它调节两个 、 三个或四个通道.