Cast iron manual handwheel gear box with declutchable

TECHNICAL FEATURES
- This operator has been designed in order to obtain an emergency operation of valves, controlled by 1/4 turn pneumatic actuator, whenever the compressed air is missing. The operator is mounted between the valve and the pneumatic actuator. With disengaged operator, the actuator drives the valve directly. The engaged operator allows the emergency operation moving the actuator and consequently the valve plug. Moreover it allows a manual operation of the valve if the actuator should be removed for replacement or repairing.
- Protection rate IP65
- Operating temperature -20°C + 120°C

MATERIALS
- Body: Cast iron GG25/ASTM A48-40
- Worm gear: Ductile Iron GGG40 / ASTM D60-40-18
- Worm screw: Steel C45/AISI 1045
- Shaft: Protected Steel
- Hand wheel: Painted Steel

DISENGAGEMENT
Pull the knob (2) towards outside and at the same time turn the lever (1) downward (clockwise). In the meanwhile release the knob (2) and be sure that it comes back to the initial position (until you hear the click). At this point the lever (1) cannot turn, the gear box is disengaged and the wheel (3) turn is neutral.

ENGAGEMENT
For engaging it is necessary to operate as described above but turning the lever (1) upward (counterclockwise). At is point the gear box is engaged and you can operate with wheel (3) manually.