SIEMENS阀门定位器73N系列技术参数
SPECIFICATIONS | |
Input Range | 3-15, 3-9, 9-15, 6-30, 3-27 psig |
Valve Travel | Minimum: 1/4" |
Supply Pressure | Minimum: 3 psi above required actuator pressure |
SIEMENS阀门定位器73系列介绍
73系列内置式阀门定位器利用其全部气源驱动并维持气动执行器中的活塞或隔膜，从而将阀门定位到控制仪表所需的位置，不受任何可能改变阀门位置的外力影响。
该系列紧凑型仪表采用单轴力平衡工作原理，确保控制阀定位的精确性和稳定性。在所有情况下，包括底部加载应用，73型内置式阀门定位器都直接安装在阀门顶部，无需外部杠杆或其他外露机构。
每个定位器接收来自控制仪表的信号，并利用高达100 psig的气源，驱动阀门执行器到达所需位置。
与所有阀门定位器一样，73型内置式阀门定位器具有反馈电路，用于测量执行器活塞或隔膜的位置。然后，定位器通过供气或排气来调节执行器，使其处于相应控制仪表所需的范围内。
阀门执行器中活塞或膜片的位置是通过量程弹簧施加在阀门定位器膜片组件上的压缩力来感应的。通过从多种可选量程弹簧中选择合适的弹簧，几乎可以获得任意组合的阀门行程（从 1/4 英寸到 4 英寸）和仪表量程（从 2 到 24 psi）。
The Series 73 Built-in Valve Positioners use the full force of their air supply to drive and maintain the piston or diaphragm in a pneumatic actuator to position a valve to what is required by a control instrument, regardless of the presence of forces that change valve position.
This line of compact instruments incorporates a single-axis, force-balance principle of operation to ensure accurate and stable control valve positioning. In all cases, including bottom-loading applications, a Model 73 Built-In Valve Positioner is mounted directly on the topwork of the valve, with no external levers or other exposed mechanisms.
Each positioner receives a signal from a control instrument, and using an air supply as high as 100 psig, the positioner strokes the valve actuator to the required position
Like all valve positioners, the Model 73 Built-In Valve Positioners have feedback circuits designed to measure the position of the actuator's piston or diaphragm.The positioner then supplies or exhausts air to bring the actuator within the required range for its corresponding control instrument.
The position of the piston or diaphragm in the valve actuator is sensed by the amount of compressive force exerted by a range spring on the valve positioner's diaphragm assembly. By selecting the appropriate range spring from the wide selection available almost any combination of valve stroke (from 1/4" to 4") and instrument span (from 2 to 24 psi) can be obtained.
SIEMENS阀门定位器73系列其他常用型号：
SIEMENS 73N12F
SIEMENS 73N24F
SIEMENS 73N-FR
SIEMENS 73N-B
SIEMENS 73N-B1
SIEMENS Valve Positioners NEW + ORIGINAL+ ONE YEAR WARRANTY
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SIEMENS阀门定位器73系列73N12F技术参数及介绍
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