译文：
阀门电动装置是实现阀门远程控、自控和遥控不可缺少的驱动设备，其运动过程可由行程、转矩或轴向推力的大小来控制。由于阀门电动装置的工作特性和利用率取决于阀门的种类、装置工作规范及阀门在管线或设备上的位置。 电动装置一般由下列部分组成： 专用电动机，特点是过载能力强﹑起动转矩大﹑转动惯量小，短时﹑断续工作。 减速机构，用以减低电动机的输出转速。 行程控制机构，用以调节和准确控制阀门的启闭位置。 转矩限制机构，用以调节转矩(或推力)并使之不超过预定值。 手动﹑电动切换机构，进行手动或电动操作的联锁机构。 开度指示器，用以显示阀门在启闭过程中所处的位置。 一、根据阀门类型选择电动执行器 1．角行程电动执行器（转角<360度）适用于蝶阀、球阀、旋塞阀等。 电动执行器输出轴的转动小于一周，即小于360度，通常为90度就实现阀门的启闭过程控制。此类电动执行器根据安装接口方式的不同又分为直连式、底座曲柄式两种。 a)直连式：是指电动执行器输出轴与阀杆直连安装的形式。 b)底座曲柄式：是指输出轴通过曲柄与阀杆连接的形式。 2．多回转电动执行器（转角>360度）适用于闸阀、截止阀等。 电动执行器输出轴的转动大于一周，即大于360度，一般需多圈才能实现阀门的启闭过程控制。 3．直行程（直线运动）适用于单座调节阀、双座调节阀等。 电动执行器输出轴的运动为直线运动式，不是转动形式。 二、根据生产工艺控制要求确定电动执行器的控制模式 1．开关型（开环控制） 开关型电动执行器一般实现对阀门的开或关控制，阀门要么处于全开位置，要么处于全关位置，此类阀门不需对介质流量进行xx控制。 特别值得一提的是开关型电动执行器因结构形式的不同还可分为分体结构和一体化结构。选型时必需对此做出说明，不然经常会发生在现场安装时与控制系统冲突等不匹配现像。 a)分体结构（通常称为普通型）：控制单元与电动执行器分离，电动执行器不能单独实现对阀门的控制，必需外加控制单元才能实现控制，一般外部采用控制器或控制柜形式进行配套。 此结构的缺点是不便于系统整体安装，增加接线及安装费用，且容易出现故障，当故障发生时不便于诊断和维修，xxx不理想。 b)一体化结构（通常称为整体型）：控制单元与电动执行器封装成一体，无需外配控制单元即可现实就地操作，远程只需输出相关控制信息就可对其进行操作。 此结构的优点是方便系统整体安装，减少接线及安装费用，容易诊断并排除故障。但传统的一体化结构产品也有很多不完善的地方，所以产生了智能电动执行器。 2．调节型（闭环控制） 调节型电动执行器不仅具有开关型一体化结构的功能，还能对阀门进行xx控制，调节介质流量。 a)控制信号类型（电流、电压） 调节型电动执行器控制信号一般有电流信号(4～20mA、0～10mA)或电压信号(0～5V、1～5V)，选型时需明确其控制信号类型及参数。 b)工作形式（电开型、电关型） 调节型电动执行器工作方式一般为电开型（以4～20mA的控制为例，电开型是指4mA信号对应的是阀关，20mA对应的是阀开），另一种为电关型（以4-20mA的控制为例，电开型是指4mA信号对应的是阀开，20mA对应的是阀关）。耐磨焊条 c)失信号保护 失信号保护是指因线路等故障造成控制信号丢失时，电动执行器将控制阀门启闭到设定的保护值，常见的保护值为全开、全关、保持原位三种情况。 三、根据使用环境和防爆等级分类的电动装置 根据使用环境和防爆等级要求，阀门的电动装置可分为普通型、户外型、隔爆型、户外隔爆型等。 根据阀门所需的扭力确定电动执行器的输出扭力 阀门启闭所需的扭力决定着电动执行器选择多大的输出扭力，一般由使用者提出或阀门厂家自行选配，做为执行器厂家只对执行器的输出扭力负责，阀门正常启闭所需的扭力由阀门口径大小、工作压力等因素决定，但因阀门厂家加工精度、装配工艺有所区别，所以不同厂家生产的同规格阀门所需扭力也有所区别，即使是同个阀门厂家生产的同规格阀门扭力也有所差别，当选型时执行器的扭力选择太小就会造成无法正常启闭阀门，因此电动执行器必需选择一个合理的扭力范围。 四、正确选择阀门电动装置的依据： 操作力矩：操作力矩是选择阀门电动装置的最主要参数，电动装置输出力矩应为阀门操作{zd0}力矩的1.2～1.5倍。 操作推力：阀门电动装置的主机结构有两种：一种是不配置推力盘，直接输出力矩；另一种是配置推力盘，输出力矩通过推力盘中的阀杆螺母转换为输出推力。

“ Actuator setting basic parameters ”是由提供的国际阀门新闻，译文仅供参考。另外，中国旋塞阀网还提供相关产品搜索：、、、、等。

原文：
Electric valve actuators to achieve remote control valve, automatic control and remote drives indispensable, their movement can travel, torque or to control the size of the axial thrust. As the valve actuators of the operating characteristics and efficiency depends on the type of valves, fittings and valves in the pipeline specification of work or equipment on location. Electrical devices generally consists of the following components: Special motor, characterized by high starting torque overload ﹑ ﹑ strong inertia of small, short-term intermittent work ﹑. Reducer to reduce the motor's output speed. Stroke control mechanism for the regulation and precise control of valve opening and closing position. Torque limit agencies to adjust torque (or thrust) and make no more than a predetermined value. Manually, electrically powered switch machine, manual or electric operation of the interlocking institutions. Opening indicator to show the process of opening and closing the valve in position. 1, according to the type selection valve actuator 1. Rotary electric actuator (angle <360 degrees) for the butterfly valve, ball valve, plug valve and so on. Actuator output shaft rotation is less than a week, that is less than 360 degrees, usually 90 degrees on the realization of the valve opening and closing process control. Such electric actuators different ways depending on the installation interface, divided into direct-attached, two base crank. a) Direct connection type: is the actuator output shaft and the valve stem in the form of direct connection to install. b) base Crank: refers to the output shaft connected through the crank and stem form. 2. Multi-turn actuator (corner of> 360 degrees) for the valve, the cut-off valve. Actuator output shaft rotation over a week, that is greater than 360 degrees, it generally takes more to achieve the valve open and close loop process control. 3. Linear actuator (linear motion) is applied to single-seat control valve, double seat control valve. Actuator output shaft to linear motion-type exercise, not turn the form. Second, according to production process control requirements to determine actuator control mode 1. Switch (open loop control) General Electric Actuator Switch to realize on or off control valve, the valve or in a fully open position, or in a fully closed position, these valves do not need precise control on the media flow. Particularly worth mentioning is the switch for electric actuator structure can be divided into sub-forms of different structure and integrated structure. Selection of the time required for a clarification, or often in the on-site installation and control system does not match the conflict is like. a) sub-structure (often referred to as ordinary): Control unit with separate electric actuator, electric actuator can not achieve control of the valve, plus a control unit necessary to achieve control, the general external form using the controller or control cabinet for matching. The disadvantage of this structure is not easy to install the whole system to increase the wiring and installation costs, and prone to failure, when failure occurs is not easy to diagnose and repair cost is not ideal. b) integration of structure (often referred to as the overall type): the control unit and electric actuator packages into one, without external control unit can be equipped with practical in-place operation, the remote can only control information related to its output to operate. This structure is convenient to install the whole system to reduce wiring and installation costs, easy to diagnose and troubleshooting. However, the integration of traditional structured products, there are many imperfections, it had intelligent electric actuator. 2. Adjustment type (closed-loop control) Regulating electric actuator is not only integration of structure and function of switching, but also precise control of valve to regulate the media traffic. a) control signal type (current, voltage) Regulating electric actuator control signals generally have current signal (4 ~ 20mA, 0 ~ 10mA) or voltage signal (0 ~ 5V, 1 ~ 5V), the time required to clear the selection control signal type and parameters. b) forms of work (power open type, power off type) Regulating electric actuator for the electrical work normally open type (by 4 ~ 20mA control, for example, will open the type is 4mA signal corresponds to valve off, 20mA corresponds to the valve open), and the other relevant type of electrical (with 4-20mA control, for example, will open the type is 4mA signal corresponds to valve opening, 20mA corresponds to the valve off). Electrode wear c) loss of signal protection Loss of signal protection is caused due to fault lines, the control signal is lost, the electric actuator to open and close the control valve set to protect the value of protecting the common value of open, fully closed, three cases remain in situ. Third, according to level of use of the environment and explosion-proof electrical equipment classification According to level of use of the environment and explosion-proof requirements of the valve electric device can be divided into common type, outdoor type, explosion-proof type, and other outdoor explosion-proof type. According to the valve torque required to determine the output torque electric actuator The torque required to open and close the valve actuator selection determines how much output torque, generally made by the user, or self-selection valve manufacturers, as the actuator manufacturers only responsible for the implementation of the output torque, valve normal Kai torque required to close the valve diameter by the size, work pressure and other factors, but precision valve manufacturer, the assembly process be different, so different manufacturers with the specifications of the required valve torque is also somewhat different, even with a valve manufacturers valve torque the same specifications are also different, when the elected type torsion actuator selection is too small will result in not the normal opening and closing valves, the actuator torque required to select a reasonable range. Fourth, the right choice based on valve electric device: Operating torque: torque operation is to select the main parameters of electric valve actuators, electric actuator output torque valve operation should be the maximum torque of 1.2 to 1.5 times. Operation Thrust: the structure of main valve electric device, there are two: one is not configured thrust plate, direct output torque; the other is the thrust configuration, the output torque of the valve stem through the thrust plate is converted to output thrust nut.