Bray Commercial DM24-70 Actuator

The Bray DM24-70 Actuator is a high-performance proportional control actuator engineered for precise modulation in commercial HVAC systems. Providing 70 lb-in (8 Nm) of torque, this direct-coupled unit is designed for damper actuator applications and control valves requiring reliable 2-10VDC or 4-20mA signal inputs. Operating on a universal 24VAC/DC power supply, the DM24-70 ensures seamless integration into existing BAS (Building Automation Systems). This model is technically identical to the NR-2208-541, making it a drop-in replacement for legacy Schneider Electric or Barber-Colman installations. The brushless DC motor provides constant torque and precise positioning throughout its 95-degree rotation, while the manual override button allows for quick mechanical adjustments during commissioning. Designed for NEMA 2 environments, the rugged housing and simplified wiring make this a preferred choice for contractors focusing on thermal efficiency and system longevity.

Key Benefits for Technicians

• Universal Compatibility: Accepts both 2-10VDC and 4-20mA control signals for versatile field application.
• Direct Cross-Reference: 100% identical functional replacement for the NR-2208-541, reducing diagnostic time.
• Brushless DC Motor: Delivers consistent torque output and eliminates the failure points found in brushed motors.
• Selectable Rotation: Features a simple switch to change clockwise or counter-clockwise rotation without rewiring.
• Automatic Calatration: Self-referencing stroke limit ensures the actuator finds its end-stops reliably.

Common Installation Questions

Can the DM24-70 handle 4-20mA signals without an external resistor?
Yes, the Bray DM24-70 is designed to natively process a 4-20mA input signal via internal impedance adjustments, simplifying the wiring for modulating control setups.

Is this model suitable for outdoor installation?
The DM24-70 features a NEMA 2 / IP54 rating. For rooftop units or exposed environments, a weather shield or NEMA 4 enclosure is recommended to prevent moisture ingress.

How do I override the actuator for manual positioning?
The unit includes a manual declutch button on the face of the housing, allowing contractors to position the damper or valve manually during power outages or system testing.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.