Cleanroom Equipment Spare Parts

Damper Actuator

A compact direct-coupled rotary actuator that positions a matched AHU or ventilation damper through its shaft without a separate linkage assembly.

Direct Shaft Coupling
Visible 0-90 Degree Scale
Manual Override Button
Anti-Rotation Bracket

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Product Introduction

The damper actuator mounts directly on a round or square damper shaft and converts an electrical control command into controlled quarter-turn movement. A split universal clamp transfers torque to the shaft, while the separate anti-rotation bracket prevents the actuator body from turning with the drive. The visible angle scale supports setup checks, and the external manual-override control allows the coupling to be positioned when the selected model and operating instructions permit. Shaft geometry, required torque, rotation direction, supply voltage and signal type must all correspond with the installed damper and controller.

Key Features

A split metal shaft clamp provides a compact direct-coupled interface without an external crank linkage.

The separate slotted anti-rotation bracket restrains the housing while allowing practical mounting adjustment.

A clearly marked angle scale and external override control support setup and service checks at the actuator.

A gland-protected multi-core lead keeps power and control conductors together for orderly equipment wiring.

Customer Product Concerns

Dependable damper positioning requires the actuator torque, shaft interface and electrical control method to be selected as one compatible assembly.

An undersized actuator may stall before a large or tightly sealed damper reaches its commanded position.Required torque is assessed from damper area, seal friction, blade arrangement and the manufacturer's sizing allowance before the actuator is selected.

A replacement with the wrong control signal cannot follow the existing controller output.Supply voltage and on/off, floating or proportional input are matched to the installed control sequence and wiring.

An incompatible or poorly tightened clamp can slip on the shaft and lose blade position.Shaft shape, diameter, insertion length and clamp range are verified together, then secured with the specified fastening method.

Limited clearance or an incorrect restraint point can make the housing rotate or obstruct service access.The actuator orientation and anti-rotation bracket position are configured around the available AHU panel and shaft location.

Typical Applications

AHU outdoor- and return-air dampersMixing and recirculation dampersVAV terminal and zone dampersVentilation isolation and control dampers

Technical Parameters

Typical construction and dimensional ranges for compact direct-coupled rotary damper actuators are listed below.

Core Material	Durable engineering-polymer enclosure with copper-wound motor and steel gear and drive components
Panel Thickness	45-90 mm nominal actuator enclosure depth
Effective Width	60-130 mm nominal actuator body width
Maximum Length	Up to 260 mm overall body and anti-rotation bracket envelope
Steel Facing Thickness	1.5-4.0 mm zinc-plated steel clamp and bracket section thickness
Core Density	Approximately 1100-1500 kg/m³ for the engineering-polymer enclosure
Thermal Conductivity	Approximately 0.20-0.35 W/(m·K) for the engineering-polymer enclosure
Surface Finish	Matte black molded housing with zinc-plated silver shaft clamp and bracket, black cable and color-coded conductors
Joint Type	Direct-coupled split shaft clamp with adjustable anti-rotation bracket and gland-protected wired connection
Customization	Available based on the intended application and operating environment.

Available Options

On/off, floating or proportional controlMatched 24 V or line-voltage configurationNon-spring-return or spring-return operationAuxiliary switch and feedback options

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