梅索尼兰Masoneilan定位器8013-255与257有何不同

定位器8013-255是防爆型，定位器8013-257是升级版本，既防风防雨又带防爆哦

Cam: Only one cam can be provided, depending on the
selected lobe, equal-percentage or linear (and linear splitrange)
control characteristics. Linkage and associated
backlash problems are essentially eliminated by mounting the
cam directly to the end of the plug shaft (rotary valves) or the
actuator stem (reciprocating valves).
Electrical circuit: The 8013 Series electro-pneumatic
positioner can be supplied or easily adapted to accommodate
the DC output signals of nearly all the electric controllers
presently available. The coil is impregnated with an insulating
material
凸轮:只有一个凸轮可以提供根据
选择叶,等百分比或线性(和线性splitrange)
控制的特点。链接和相关
反弹问题本质上是被挂载
凸轮结束直接塞轴(旋转阀)或
执行机构阀杆(往复阀)。
电路:8013系列电动气动
定位器可以提供或容易适应适应
几乎所有的直流输出信号电动controlle
The primary function of a valve positioner is to ensure that the
control valve plug position is always proportional to the value of
the controller output signal, regardless of packing box friction,
diaphragm actuator hysteresis, or out-of-balance forces on the
valve plug. The controller output signal may be pneumatic or
electric, depending on the type of positioner.
GE’s Masoneilan 8012 and 8013 Series cam positioner is a forcebalance
electro-pneumatic device which, by directly comparing
valve position with a controlled DC output signal, provides
excellent dynamic response and positioning accuracy. One multilobe
cam provides field-changeable linear- or percentage-control
characteristics without additional parts.
阀门定位器的主要功能是确保
控制阀插头位置总是成正比的价值
控制器输出信号,无论包装盒子摩擦,
薄膜执行机构滞后,或不平衡的力量
阀塞。气动或控制器的输出信号
电,这取决于类型的定位器。
通用电气的Masoneilan 8012和8013系列凸轮定位器是一个forcebalance
电动气动装置,通过直接比较
阀pos
The 8013 Series electro-pneumatic cam positioner is able:
?     To change the valve action (increase in electrical signal opens
or closes the valve)
?     To change control characteristics (linear or equal-percentage)
?     To operate each of two control valves (split-range)
The 8013 Series positioner is available for either direct action
(increase in electrical signal increases output pressure) or
reverse action (increase in electrical signal decreases output
pressure). In addition, the positioner provides an accurate
means of split-ranging controller output signal for sequential
operation of two control valves by a single controller
8013系列电动气动凸轮定位器可以:
?改变阀操作(增加电信号打开
或关闭阀)
?更改控制特征(线性或相同比例)
?操作每两个控制阀(分段)
8013系列定位器是对直接行动
(增加电信号输出压力增加)或
扭转操作(增加电信号减少输出
压力)。此外,定位器提供的
Housing: The cast aluminum case is mounted at the front
of the device by means of a mounting plate and a molded
support.
Beam and flexure bearings: Beryllium copper flexure bearings
provide friction-free fulcrum points for the beam.
Pilot: High-capacity type for fast stroking speeds. The
metering tube for the nozzle air supply is equipped with a
clean-out plunger.
住房:铸铝合金外壳安装在前面
设备的安装板和模制的手段
支持。
梁和挠曲轴承:铍铜合金轴承曲
提供无摩擦梁支点点。
飞行员:高容量类型抚摸速度快。的
计量喷嘴供气管是配备一个
清洗柱塞。