The electric multi-turn actuator is the most common and most reliable type of actuator. Single-phase or three-phase motor drive gear or worm final drive stem nut, stem nut stem movement to open or close the valve.
The multi-turn electric actuator can quickly drive the large size valves. In order to protect the valve from being damaged, installed in the switch status at the end of the valve travel limit switch will cut off electrical power at the same time when the security torque is exceeded, the torque sensing device will cut off electrical power, the position switch is used to indicate valve hand wheel clutch device is installed manually operated valves in the event of a power failure.stainless steel pneumatic cylinders
The main advantage of this type of implementing agencies All components are mounted in a housing, waterproof, dustproof, explosion-proof enclosure integrates all the basic and advanced features. The main disadvantage is that when a power failure, the valve can only remain in place, only the use of standby power systems, the valve can be fail-safe position (fail open or fail closed)standard air cylinder
没有评论:
发表评论