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Multi-Turn On-off Actuator Accelerated Development
- Jun 13, 2017 -

With the development of science and technology, automation equipment has been accelerating development. Obsolete traditional operations were upgraded to automated control in various industrial areas. The valves of each pipeline are also changed from the process valve to the instrument valve, Multi-Turn On-off Actuator and the instrument valve is required to select the suitable actuator and valve for the design and calculation of each process pipeline in order to ensure the later use. The next little series is about the classification and selection of actuators.

The broadest definition of an actuator is a drive device that provides a straight or rotary motion that uses electricity or gas as a driving force and works under a control signal such as a current or voltage, thus reaching a drive to open the shutoff valve. Although most actuators are used for on-off valves, Multi-Turn On-off Actuator but today's actuators are designed to go well beyond simple switching functions, including positional sensors, torque sensors, electrode protectors, logic controls, digital communication modules and PID control modules, all of which are installed in a compact enclosure.

Because more and more factories use automation control, Multi-Turn On-off Actuator manual operation is replaced by mechanical or automation equipment, people require the actuator to be able to control the interface between the system and valve mechanical movement, more require the executing agency to enhance work safety performance and environmental protection performance. In some dangerous situations, automated actuators can reduce injuries. Some special valves require emergency opening or closing in exceptional circumstances, and valve actuators can prevent further spread of the risk while minimizing factory losses. For some high-pressure large-caliber valves, Multi-Turn On-off Actuator the required actuator output torque is very large, then the required actuator must improve mechanical efficiency and use of high output motor, such a smooth operation of large diameter valves.

In order to achieve the successful process automation, the most important thing is to ensure that the valve itself to meet the process and the special requirements of the medium in the pipeline. Usually the production process and the process medium can determine the type of valve, the types of spool and the structure and material of valve.

After the valve is selected, the next step is to consider the requirements of automation, the choice of the executing agency. The actuator can be considered simply by two basic types of valve operation.

1, rotary valve (single rotary valve), such valves include: plug valve, and the throttle or baffle. This type of valve requires the required torque to perform a 90 degree rotation operation of the actuator

2, many rotary valves, Multi-Turn On-off Actuator this type of valve can be either rotary lift stem or rotating non-lifting rod, or they need to operate more to drive the valve to the open or closed position. This type of valve includes: pass valve (stop valve), gate valve, knife gate valve and so on. As an option, the linear output of pneumatic or hydrodynamic cylinders or film actuators also drives the above valves.