The pneumatic actuator handwheel mechanism is a critical safety redundancy design for manually operating valves in the event of pneumatic system failure or maintenance, ensuring continuity and safety of industrial processes
Structure composition
Handwheel: Usually made of metal (such as cast iron, stainless steel) or high-strength plastic, with a non-slip surface or handle to facilitate manual application of force.
Transmission mechanism:
Gear/worm gear: amplifying torque through deceleration ratio, suitable for large diameter valves; Worm gear structure can be self-locking to prevent reversal.
Lead screw or connecting rod: Used in linear actuators to convert rotational motion into linear displacement.
Clutch device:
Mechanical clutches: Switch between manual and automatic modes of power transfer via a fork, slide sleeve or pin.
Automatic reset type: part of the design automatically switches back to pneumatic mode after the air supply is restored.
Typical application scenarios
Emergency cut off: If the chemical reactor pressure is too high, manually close the feed valve.
System commissioning: Manually calibrate valve position after installation or overhaul.
Airless environments: such as remote areas or temporary operations in mobile devices.
Areas with high security requirements: Scenarios requiring redundant control, such as nuclear power and natural gas pipelines.
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