A pneumatic rotary actuator angular position servo system is studied, which adopts 3-port proportional flow valve as a control device.

该文对三通比例流量阀控制的摆动气缸转角位置伺服系统进行研究。

In liquid, gas or powder medium flow pipe, need different kinds of medium flow valve cut or control.

在液体、气体或粉末介质流动的管道中，需要不同种类阀门对介质的流动进行切断或控制。

Based on the sealing mechanism of the metallic sealing pair, the necessary conditions of sealing were analyzed and the large flow valve components were designed.

从金属密封副的密封机理出发，对密封的必要条件进行了分析，设计出了大流量的阀座组件。

Direct control of electro hydraulic digital direction & flow valve by means of PLC can make the control system of hyd. system become simpler, cheaper and reliabler.

采用可煽程控制器（PLC）直接控制电液数字方向流量阀，可使液压系统的控制系统简洁、可靠、成本显着下降。

The reasonable technique was presented to ensure the manufacturing quality of valve components and sealing failure problem was solved in large flow valve components under high-pressures.

并提出了合理的工艺保证阀座组件的加工，解决了高压条件下大流量阀座组件的密封不良问题。

The paper investigated the flow distribution of solid phase and the respective resistance properties of branch pipes when both conveying velocity and the flow valve opening of branch pipe are changed.

通过试验，当输送气速和分支管路流量控制阀开度变化时，对分支管路各自的阻力特性和固相颗粒在各分支管路中的流量分配特性进行了研究。

Because oil fields need the water injection well monitoring device, design a kind of flow rate automatic flow valve that is applied in the water injection well monitoring device.

结合油田注水井监控装置的需要，设计了一种流量自动调节阀，用来配合注水井监控装置的使用。

Leading energy loss of the flow valve in hydraulic rock drill was analyzed and its formula was presented.

分析了液压凿巖机配油阀的主要能量损失，给出了其计算表达式。

The respective resistance properties for branch pipe were investigated through experiments and GRNN neural network when both conveying velocity and the flow valve opening of branch pipe were changed.

通过试验和GRNN神经网络对输送表观气速和两分支管路流量控制阀开度发生变化时，各分支管路中的阻力特性进行了研究。

An over review of the proportional pressure valve and proportional flow valve at home and abroad is summarized.

综述了比例压力阀和比例流量阀国内外的研究进展，并且对比例阀未来的发展趋势进行了展望。