EP4000电气阀门定位器
1. 概要 GENERAL
   EP4000系列电气阀门定位器与气动执行机构配套使用,输入4~20mA.DC的信号转换成输出空气压力,控制执行机构的行程进行反馈,从而使执行机构的行程能按控制信号进行精确定位。
   EP4000系列电气阀门定位器能用于单动作型和双动作型执行机构。
  The EP4000 Series Positioner, mounted on a pneumatic actuator, moves the actuator by receiving DC 4~20mA signals from a controller.Also, the function of detecting and returning the actuator displacement provides accurate positioning in response to DC 4~20mA signals.
  The EP4000 can be used with both springreturn and double acting actuators.
2. 特点 FEATURES
 1、适用于小容量及大容量的执行机构
由于采用了载荷控制弹簧,选择相应的弹簧后就能获得最适合于该执行机构的定位器。
 2、耗气量小
放大器的耗气量小、容量大。
  3、可以选择输出特性
由于反馈机构中有凸轮装置,因此可以选择特性以外的输出特性。
  4、各种反馈方式对应的型号
只要更换凸轮装置,就可以用于以下对应的执行机构。
*直行程执行机构:标准型-------EP4□1□
*角行程执行机构:标准型-------EP4□2□
  5、易变换成反作用放大器
单作用执行机构在需要反作用控制时,正作用型放大器很容易变换成反作用型放大器。
  6、耐压防爆型可在现场进行调整
由于信号(4~20mA.DC)输入端接头及线圈部位的封装呈耐压防爆结构,因此在进行检修及行程调整时,可以在现
场防爆区域内拆除定位器外壳。
  7、本质安全的构造有着广阔的适用范围
接线盒及线圈有着本质安全型的构造,因此与专用的齐纳安全栅组合使用能使力矩线圈适用于所有危险气体的场所
(包括0区),使用环境温度范围为-40~+60℃
  1、USABLE WITH LOW TO HIGH CAPACITY ACTUATORS
   By adjusting the built-in capacity control spring, the positioner can be made optimum to the given actuator.
  2、A LOW AIR CONSUMPTION
   The pilot valve is low in air consumption and high in capacity.
  3、OUTPUT CHARACTERISTICS SELECTABLE
   Having a cam within the feedback construction, choices other than the standard linear characteristic are available.
  4、COMPATIBLE WITH VARIOUS FEEDBACK TYPES
   Applicable to the following types by simply exchanging the cam block.
   *For linear type actuator:Feedback for Standard lever type-------EP4□1□
   *For rotary type actuator:Feedback for Standard lever type-------EP4□2□
  5、REVERSE ACTION PILOT VALVE EASILY AVAILABLE
   The positioner for double acting actuators can be used as a reverse action pilot valve when combined with a spring return actuator
   that requires a reverse action pilot.
 6、ANTI-PRESSURE ANDEXPLOSION PROOF STRUCTURE MARKING ON-SITE ADJUSTMENT POSSIBLE
   The anti pressure and explosion proof construction, with the terminal and coil blocks enclosed together in one package, makes it
   possible to remove the positioner cover for inside inspection or span adjustment even in an explosive ambient.
  7、INTRINSICALLY SAFE CONSTRUCTION FOR A WIDE SCOPE OF APPLICATIONS
   The intrinsically safe construction cover teminals and coil as one package. This, combined with The adoption of the specified zener
   barrier, makes the unit applicable in all hazardous gas location(including class 0 area) ranging from low(40℃) to high(+60℃)
   temperature environment .
3. 技术参数 TECHNICAL DATA
基本误差Intrinsic error:±1%(单作用);±1.5%(双作用);
回  差Hysteresis error:1%(单作用); 1.5%(双作用);
死  区Dead band: 0.2%(单作用); 0.4%(双作用);
额定行程Rated travel:0-(10-100)mm
            0-(50o -75o -90o)角行程
气源压力Air supply:0.14-0.7MPa
输入信号Input signal:4-20mA.DC(可分程);
          0-10mA.DC(可分程)
耗气量Air consumption:单作用Single acting type:5L/min(供气0.14MPa)
           双作用Double acting type:15L/min(供气0.4MPa)
输出特性Characteristic:线性Linear,等百分比Equal percentage
环境温度Ambient temperature:-35~+60℃
             -20~+60℃(本安型)ExiaIICT6
相对湿度Ambient humidity range:10-90%
输出压力Output pressure:0.02-0.6MPa
防爆型式Ex.enclosure:隔爆Exd II BT6,本安Exia II CT6,普通Non-Explosion
防护等级protect ion:IP65
输入阻抗Input impedance:250Ω±5%(at 20℃)
气源接头Air connection:ZG1/4,联接铜管Φ6
电源接口Wiring connection:G1/2
壳体材料Housing material:铝合金Aluminum alloy
外形尺寸Size:205×192×78mm
重  量Weight:2.1Kg

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