Yangzhou Hengchun Electronics Co., Ltd

High quality product, professional service, being the core supplier in laser industry!

Home > News > Content
Multi-Turn On-off Actuator Accelerated Development
- Jul 20, 2017 -

With the development of science and technology, Multi-Turn On-off Actuator automation equipment has been accelerating the development. Multi-Turn On-off Actuator Each of the industrial areas out of the traditional operations to upgrade to automatic control. Each valve is also the valve from the process valve to the instrument valve conversion, instrumentation valve is the need for the previous process design and calculation of the appropriate choice of the implementing agencies and valves in order to ensure the use of the late.Multi-Turn On-off Actuator Next Xiaobian tell us about the classification and selection of the implementing agencies.

The most widely defined definition for an actuator is a drive that provides linear or rotational motion, which utilizes electricity or gas as the driving energy and operates under a control signal such as current or voltage to achieve the opening of the valve. Although most of the actuators are used to switch valves, Multi-Turn On-off Actuator today's actuators are designed to go beyond simple switching functions, including position sensing devices, torque sensing devices, electrode protection devices, logic control devices, Multi-Turn On-off Actuator digital communication modules And PID control module, etc., and these devices are all installed in a compact shell.

Because more and more plants use automated control, Multi-Turn On-off Actuator manual operation is replaced by mechanical or automated equipment, requiring the actuator to act as an interface between the control system and the mechanical movement of the valve, requiring the actuator to enhance work safety performance and Environmental protection performance. In some dangerous situations, automated actuator devices can reduce the damage of personnel. Some special valves require emergency opening or closure in exceptional circumstances, Multi-Turn On-off Actuator and the valve actuator prevents further spread of the risk and minimizes plant losses. For some high-pressure large-diameter valves, the required actuator output torque is very large, Multi-Turn On-off Actuator then the required actuator must improve the mechanical efficiency and the use of high-output motor, so smooth operation of large diameter valves.

In order to successfully automate the process, the most important thing is to ensure that the valve itself can meet the process and the special requirements of the medium within the pipeline. Usually the production process and process media can determine the type of valve, Multi-Turn On-off Actuator the type of spool and trim and valve structure and materials.

1, rotary valve (single rotary valve), such valves include: plug valve, and the damper or baffle. Multi-Turn On-off Actuator This type of valve requires the required torque to carry out the 90 degree rotation operation of the actuator

2, multi-turn valve, this type of valve can be non-rotating lift stem or rotating non-lifting rod, or that they need to turn the operation to drive the valve to open or close position. Such valves include: through the valve (cut-off valve), gate valve, knife gate valve. As an option, Multi-Turn On-off Actuator the linear output of the pneumatic or liquid cylinder or film actuator also opens to drive the valve.

If the actuator is required to control the level of the process system, Multi-Turn On-off Actuator flow or pressure and other parameters, which is required to perform frequent action of the actuator, you can use 4-20mA signal as a control signal, but this signal may be as frequent as the process change. Multi-Turn On-off Actuator If you need a very high frequency action of the implementing agencies, only the choice of a special start and stop the regular actuator. When multiple actuators are required in a process, it is possible to connect the various actuators by using a digital communication system, which can greatly reduce the installation cost.Multi-Turn On-off Actuator The digital communication loop can quickly and efficiently deliver instructions and collect information. There are a variety of communication methods such as: FOUNDATION FIELDBUS, PROFIBUS, DEVICENET, HART and designed for the valve actuator PAKSCAN and so on. Digital communication systems can not only reduce investment costs, Multi-Turn On-off Actuator they can also collect a lot of valve information, the information for the valve's predictive maintenance program is very valuable.