阀门控制

This paper introduces the hardware design and the position control m ethod of a valve positioner based on ARM microcontroller.

介绍了一种基于ARM的智能阀门定位系统的硬件设计和定位控制方法。

It is used in controllingpneumatic linearactuators in order to orient the positioner of valve exactly.

该方案主要用于控制气动直行程执行器，实现阀门的准确定位。

At the same time, the introduction of proportional solenoid control valve core part of the location of the pilot, the design specifications for valves used in Path parameter for the 32mm, the largest flow 480L/min, I rated the work of oil into the pressure of 31.5MPa, I rated the oil pressure to 30.5MPa.

同时引入比例电磁铁控制先导部分阀芯位置，本设计所采用的阀门规格为通径参数为32mm，最大流量为480L/min，进油口额定工作压力为31.5MPa，出油口额定工作压力为30.5MPa。

Rotary control valves used in the main ball valve, butterfly valve REDUCING VALVES and so on.

应用于角行程控制的阀门主要有球阀、蝶阀等。

For most of these valves, a restriction is necessary to produce the required pressure control.

对于大多数的这些阀门、限制是必要的生产要求的压力控制。

Dedicated control valve with rubber lining Check Valves corrosive or strong corrosive medium, body cavity surface was covered with a variety of options fluorine plastic, for different temperature and fluid piping, high strength, corrosion resistance and good .

衬胶衬里阀专用于控制腐蚀性或强腐蚀性介质，电站阀门阀体内腔表面覆有可供选择的各种氟塑料，适用于不同工作温度和流体管路，具有强度高、耐腐蚀性能好的特点。

Three (3) position valve to select 1, 2 or 3 motors, selectable from control panel.

三(3)位置阀门以选择1，2或3个马达，可从控制面板选择。

The design is self contained, no control pipe is required.

这种阀门结构独立完整，不需要控制管线。

According to the signal conditioning parts, automatic control valve opening to achieve the medium flow rate, pressure and level of regulation.

根据调节部位信号，自动控制阀门的开度，从而达到介质流量、压力和液位的调节。

Adjustable feature allows control of back pressure in system, reduces water hammer, and prevents siphoning.

可调节的特性使得阀门能够在系统内进行回压控制，减少水锤现象，并且防止虹吸现象的发生。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。