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Intelligent Valve electro-pneumatic Positioner
Valve positioner , the main accessory of the regulating valve, the valve positioner is the main accessory of the regulating valve, which is used to control the opening degree of the pneumatic or electric valve to ensure that the valve can stop accurately when it reaches the predetermined position. Through the precise control of the valve positioner, the precise adjustment of the fluid can be achieved to meet the needs of various industrial processes. Valve positioners are divided into pneumatic valve positioners, electro-pneumatic valve positioners and intelligent valve positioners according to their structure. They receive the output signal of the regulator and then use the output signal to control the pneumatic regulating valve. The displacement of the valve stem is fed back to the valve positioner through a mechanical device, and the valve position status is transmitted to the upper system through an electrical signal.Pneumatic valve positioners are the most basic type, receiving and feeding back signals through mechanical devices.
The electro-pneumatic valve positioner combines electrical and pneumatic technology to improve the accuracy and flexibility of control.
The intelligent valve positioner introduces microprocessor technology to achieve higher automation and intelligent control.
Valve positioners play a vital role in industrial automation systems, especially in situations where precise control of fluid flow is required, such as chemical, petroleum, and natural gas industries. They receive signals from the control system and accurately adjust the opening of the valve, thereby controlling the flow of fluids and meeting the needs of various industrial processes. -
limit switch box-Valve Position Monitor -travel switch
The valve limit switch box, also called the Valve Position Monitor or valve travel switch, is a device used to detect and control the opening and closing position of the valve. It is divided into mechanical and proximity types.
Mechanical limit switches can be further divided into direct-acting, rolling, micro-motion and combined types according to different action modes. Mechanical valve limit switches usually use micro-motion switches with passive contacts, and their switch forms include single-pole double-throw (SPDT), single-pole single-throw (SPST), etc.
Proximity limit switches, also known as contactless travel switches, magnetic induction valve limit switches usually use electromagnetic induction proximity switches with passive contacts. Its switch forms include single-pole double-throw (SPDT), single-pole single-throw (SPST), etc.
