进口调节阀又称进口控制阀，是执行器的主要类型，通过接受调节控制单元输出的控制信号，借助动力操作去改变流体流量。进口调节阀一般由执行机构和阀门组成。如果按其所配执行机构使用的动力，进口调节阀可以分为气动、电动、液动三种，即以压缩空气为动力源的进口气动调节阀，以电为动力源的电动调节阀，以液体介质(如油等)压力为动力的电液动调节阀，另外，按其功能和特性分，还有电磁阀、电子式、智能式、现场总线型调节阀等。调节阀的产品类型很
多，结构也多种多样，而且还在不断更新和变化。一般来说阀是通用的，既可以与气动执行机构匹配，也可以与电动执行机构或其他执行机构匹配。
Composition and classification of 1 inlet control valve
The inlet control valve, also known as the inlet control valve, is the main type of actuator. By receiving the control signal output from the regulation control unit, the fluid flow is changed by power operation. The inlet control valve is generally composed of actuator and valve. If according to the power used by the actuator, the inlet control valve can be divided into pneumatic, electric and hydraulic, namely, the imported pneumatic control valve with compressed air as the power source, the electric control valve with electric power as the power source, and the electro-hydraulic control valve driven by the pressure of liquid medium (such as oil). In addition, according to its functions and characteristics, there are solenoid valve, electronic type, intelligent type, etc On site manifold control valve, etc. The product type of control valve is very large
Many, the structure is also diverse, and is constantly updated and changing. Generally speaking, the valve is universal, which can be matched with pneumatic actuator, electric actuator or other actuators.
进口调节阀阀体种类很多，常用的有直通单座、直通双座、角形、隔膜、小流量、三通、偏心旋转、蝶形、套筒式、球形等10种。在选择阀门之前，要对控制过程的介质、工艺条件和参数进行细心的分析，收集足够的数据，了解系统对调节阀的要求，根据所收集的数据来确定所要使用的阀门类型。在具体选择时，可从以下几方面考虑:
2.1 selection of valve body type the selection of valve body is the most important link in the selection of control valve.
There are many kinds of imported control valve body, commonly used are straight through single seat, straight through double seat, angle shaped, diaphragm, small flow, tee, eccentric rotation, butterfly, sleeve, spherical, etc. Before selecting the valve, carefully analyze the medium, process conditions and parameters of the control process, collect sufficient data, understand the requirements of the system for the control valve, and determine the type of valve to be used according to the collected data. In the specific selection, the following aspects can be considered:
(1) 防止闪蒸和空化闪蒸和空化只产生在液体介质。在实际生产过程中，闪蒸和空化不仅影响流量系数的计算，还会形成振动和噪声，使阀门的使用寿命变短，因此在选择阀门时应防止阀门产生闪蒸和空化。
(2)阀芯形状结构主要根据所选择的流量特性和不平衡力等因素考虑。
(3)介质的温度、压力当介质的温度、压力高且变化大时，应选用阀芯和阀座的材料受温度、压力变化小的阀门。
(4)耐磨损性当流体介质是含有高浓度磨损性颗粒的悬浮液时，阀芯、阀座接合面每一次关闭都会受到严重摩擦。因此阀门的流路要光滑，阀的内部材料要坚硬。
(5)介质的温度、压力当介质的温度、压力高且变化大时，应选用阀芯和阀座的材料受温度、压力变化小的阀门。
进口调节阀的选择是非常细致的工作，不仅要有扎实的专业理论知识，还要有丰富实践经验。选择得好不仅有利于调节控制回路PID参数的整定，使被调参数得到较好地控制效果，也使调节阀的使用寿命大大增长。进口调节阀的选择要因地制宜，并非一成不变，要在实践的过程中不断总结和创新，特别随着机电一体化技术、计算机和数字信息技术的应用，进口调节阀的结构功能变得更好、更全面，为选择进口调节阀提供了比较大的方便。
以上有关进口调节阀的相关资料是由德国洛克品牌的专业技术人员为大家讲解的，如需了解更多有关知识可以登入德国洛克官网或者来电咨询：13824185985
