For the actuators with pneumatic diaphragms or air cylinders the matching flame-proof type electric-gas valvepositioner shall be provided together with the valve.
执行机构采用气动薄膜或气缸执行机构的，随阀提供配套隔爆型电？气阀门定位器。
2
This paper introduces the hardware design and the position control method of a valvepositioner based on ARM microcontroller.
介绍了一种基于ARM的智能阀门定位系统的硬件设计和定位控制方法。
3
An internally mounted, solid state positioner board accurately controls valve position from open to close.