Declutchable Manual Override
Manual valve-operating clutch for emergency opening and closing after air supply failure
Product overview
The declutchable manual override is an emergency operating accessory for pneumatic actuators, allowing manual opening and closing of valves after air loss, power loss or automation failure. It mounts directly on the valve stem above the actuator, with a compact structure that takes no extra space. Moving the selector switches between automatic and manual modes without interference; during automatic operation, the manual parts do not rotate idly with the stem.
It suits the full range of pneumatic actuators for ball valves, butterfly valves and shut-off valves, in both carbon steel and stainless steel service. The rust- and wear-resistant housing withstands prolonged outdoor or damp workshop use without readily corroding or sticking, and permits manual operation without dismantling the valve. It is an essential safety accessory for shutdown maintenance and air-supply failures on critical chemical, gas, water-supply and drainage pipelines.
Core technology and operating parameters
| Product name | Declutchable Manual Override |
| Category | Control accessories · Manual overrides |
| Control mode | On/off / modulating |
Core construction and design advantages
Free switching between automatic and manual modes
Emergency manual operation after air or power failure
Compact construction mounts directly on top of the actuator
Easy, low-effort mode switching
Rust and wear resistance for outdoor and damp conditions
Excellent sealing with low leakage
Wear and corrosion resistance for long service life
Easy maintenance reduces operating costs
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