the occasional, electric Marine raise will priority to adopt manual butterfly Industrial Valves actuators. In this way, an auxiliary wheel installed in the executive mechanism, so that in an emergency situation, the main power interruption or accident when actuators to manual operation. Auxiliary wheel is not only easy manual operation, but also some parts can be put on a bit, make the action of the handwheel is like stop to limit the travel of the valve.

if the actuators in the case of a signal using auxiliary handwheel, a valve installed in front of the actuator or locator to close air supply and discharge or balance the pressure chamber. To prevent accidental or deliberate action, some manufacturers provide locking lever, the rod placed near a handwheel stent and locked. If you do not provide this kind of simple structure of the chain and lock can prevent the handwheel movement.

the structure of the auxiliary handwheel style a lot, sometimes depends on the actuator and the Industrial Valves structure linear or rotary motion, is sometimes electric Marine butterfly Industrial Valves actuators of the parts, while others are attached to the existing on the actuator ( Made minor modifications for installation) 。 Assisted the handwheel can be installed above the actuator ( Called the top mounted handwheel) Or installed on the side of the actuator ( Called the side of the handwheel) 。 A

for linear actuator of the handwheel is one of the most common continuous connection handwheel, it is attached to the actuator assembly, placed in neutral range to adjust the Marine electric butterfly valve actuator stroke and is not subject to interference from the handwheel. When the foot of the handwheel turned, hand wheel nut ( Or similar facilities) Movement outside the range of neutral and mesh upper or lower stop. When the handwheel continue to roll, the hand wheel nut to stop, cause the actuator rod in the direction of the movement. Continuous connection structure has the advantage of to operating actuator it does not need to set up a part to release the clutch engaged or disengaged handwheel. Moreover when the handwheel left the neutral, and its role as a direction of the limit stop. Installed in a continuous connections of the handwheel actuator can be a top mounted, but also the lateral installation.

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