Riello Hydraulic Actuator for Air Damper 3007784

The Riello Hydraulic Actuator for Air Damper 3007784 is a hydraulic actuator designed for positioning the air damper on Riello gas boilers of the B IO version. It is used in automatic control systems to provide smooth and precise movement of the actuating mechanism. The actuator translates a control signal into rotational movement, adjusting the air damper to modulate combustion air flow in proportion to fuel input. It is fully compatible with the original mounting and supports control signal formats of three-point, 0-10 V, or on/off. The manufacturer code is 3007784, and the brand is Riello (with the actuator itself branded as Schneider Electric).

When selecting a replacement actuator of this type, key parameters to match include the required torque, running time for the full stroke, control signal format (three-point, 0-10 V, or on/off), shaft or coupling pattern, angle of rotation, and presence of integral auxiliary switches for position feedback. The hydraulic design means fluid pressure generates movement, so ensure the hydraulic circuit and supply are compatible with the existing system. Before ordering, measure the damper shaft and linkage to confirm free movement and correct dimensions.

Typical failures for actuators in this class include stripped gear trains, failed end switches, and seized valve or damper stems after a period of standstill. When such failures occur, the air damper may not move or may move erratically, leading to improper combustion air flow and potential burner instability. Check the damper shaft and linkage for free movement before fitting a new actuator.