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Series-DDA-DDC
HVAC Direct Coupled Actuators - DDA & DDC, 17-70 in-lb Torque
- Direct-mount design clamps right onto 0.4″ or 0.5″ shafts - simplifies installation and reduces linkage complexity
- Visual travel indicator plus push-button manual override for clear feedback and manual operation when needed
- Magnetic-clutch overload protection and quiet operation (<45 dB) provide durability and minimal noise in HVAC-driven spaces
- Designed for 60,000 nominal cycles and operating range from -22 °F to 122 °F (-30 °C to 50 °C) - built for dependable service life
Series-DDA-DDC
From
$
49.68
Product Overview
- Angle of Rotation 95 °
- Direction of Rotation CW/CCW
- Electrical Connection Screw Terminal
- Enclosure Ratings IP40, NEMA Type 2
- Fits Shaft Diameter 0.4 in, 0.5 in
- Input Control Signal Two-Position, Floating
- Life Cycle 60000 Full Cycles
- Operating Temperature, Max 122 °F
- Operating Temperature, Min -22 °F
- Overload Protection Magnetic Clutch
- Sound Output <45 dB
- Standard Accessories (2) imitative baffles, (2) baffle setscrews, (1) actuator body setscrew, and (1) aluminum gasket
- Standard Features Position Indication: Visual Indicator ; Auto/Manual Function: Push Button
- Wire Gauge 18 AWG
The Series DDA/DDC Direct-Coupled Actuator range from Dwyer delivers a compact, high-performance solution for positioning dampers and valves in HVAC systems requiring 17 to 70 in-lb (2 to 8 Nm) of torque.
With direct-mount capability onto 0.4″ (10 mm) or 0.5″ (13 mm) shafts, the actuator eliminates the need for external linkage and oversized mechanics. A clear visual travel indicator shows shaft position, while the push-button manual override offers convenient hand operation during maintenance or setup. A built-in magnetic clutch protects against over-torque conditions, delivering quieter operation (under 45 dB) and a reliable service life rated to 60,000 full cycles.
Control flexibility is a strong point: the DDA variant handles floating (two-position) control signals, making it ideal for simple open/close damper applications. The DDC variant elevates control sophistication with modulating inputs (4–20 mA or 0–10 VDC) and supplies a 0–10 VDC feedback signal, enabling integration with building automation systems for precise flow or air handling control.
Housed in a NEMA 2 (IP40) enclosure, the actuator is rated for temperatures from -22 °F to 122 °F (-30 °C to 50 °C) and is designed for CW/CCW rotation with a 95° mechanically adjustable stroke. Electrical connection is via screw-terminal block using 18 AWG wiring; power consumption is low (3–5 VA typical) depending on input voltage.
In sum, the DDA/DDC Series offers HVAC and building control professionals a streamlined, durable actuator solution suited to both basic two-position and advanced modulating control needs - all with minimal external hardware, clear diagnostics, and long-term reliability.
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