For the actuators with pneumatic diaphragms or air cylinders the matching flame-proof type electric-gas valve positioner 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。
In this article, the design scheme of a HART protocol based intelligent electric-pneumatic valve positioner is introduced.
本文介绍了一种基于HART协议的低功能智能型电气阀门定位器的设计方案。
The technical innovation of electric-pneumatic transducer and electric-pneumatic valve positioner is close related with the innovation of electric-pneumatic transfer device.
电气阀门转换器、定位器的技术革新与电气转换装置的革新紧密相关。
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