Description
The Belimo SFA Rotary Actuator is engineered to adjust dampers in technical building installations with precision. Its robust design makes it ideal for controlling air dampers up to approximately 4 m² in size. This actuator ensures reliable performance with fail-safe capabilities, making it an essential component for HVAC systems.
Click here for the technical data PDF
Electrical Data:
- Nominal Voltage: AC 24...240 V / DC 24...125 V
- Nominal Voltage Frequency: 50/60 Hz
- Nominal Voltage Range: AC 19.2...264 V / DC 21.6...137.5 V
- Power Consumption in Operation: 7 W
- Power Consumption in Rest Position: 3.5 W
- Power Consumption for Wire Sizing: 18 VA
- Connection Supply / Control: Cable 1 m, 2x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data:
- Torque Motor: 20 Nm
- Torque Fail-Safe: 20 Nm
- Direction of Motion Motor: Selectable by mounting L/R
- Direction of Motion Fail-Safe: Selectable by mounting L/R
- Manual Override: By means of hand crank and locking switch
- Angle of Rotation: Max. 95° (adjustable by mechanical end stop)
- Running Time Motor: 75 s / 90°
- Running Time Fail-Safe: <20 s @ -20...50°C / <60 s @ -30°C
- Sound Power Level, Motor: 45 dB(A)
- Mechanical Interface: Universal shaft clamp 10...25.4 mm
- Position Indication: Mechanical
- Service Life: Minimum 60,000 fail-safe positions
Safety Data:
- Protection Class IEC/EN: II, reinforced insulation
- Protection Class UL: II, reinforced insulation
- Degree of Protection IEC/EN: IP54
- Degree of Protection NEMA/UL: NEMA 2
- Enclosure UL: Enclosure Type 2
- EMC: CE according to 2014/30/EU
- Low Voltage Directive: CE according to 2014/35/EU
- Certification IEC/EN: IEC/EN 60730-1 and IEC/EN 60730-2-14
- UL Approval: cULus according to UL60730-1A, UL60730-2-14, and CAN/CSA E60730-1
- Hygiene Test: According to VDI 6022 Part 1 / SWKI VA 104-01, cleanable and disinfectable, low-emission
- Type of Action: Type 1.AA
- Rated Impulse Voltage Supply / Control: 4 kV
- Pollution Degree: 3
- Ambient Humidity Max.: 95% RH, non-condensing
- Ambient Temperature: -30...50°C [-22...122°F]
- Storage Temperature: -40...80°C [-40...176°F]
- Servicing: Maintenance-free
Weight: 2.2 kg
Operating Mode: Equipped with a universal power supply module that supports AC 24...240 V and DC 24...125 V. The actuator moves the damper to the operating position while tensioning the return spring, and the damper returns to the fail-safe position by spring force when the supply voltage is interrupted.
Simple Direct Mounting: Direct mounting on the damper shaft with a universal shaft clamp, including an anti-rotation device to prevent actuator rotation.
Manual Override: The damper can be manually actuated using the hand crank and locked in any position. Unlocking can be done manually or automatically by applying the operating voltage.
Adjustable Angle of Rotation: The angle of rotation can be adjusted with mechanical end stops.
High Functional Reliability: Overload protection ensures the actuator stops automatically when the end stop is reached, eliminating the need for limit switches.
Electrical Accessories:
-
Auxiliary switch 2x SPDT (Type: S2A-F)
-
Feedback potentiometer 1 kΩ (Type: P1000A-F)
Mechanical Accessories:
-
Shaft extension 240 mm ø20 mm for damper shaft ø8...22.7 mm (Type: AV8-25)
-
End stop indicator (Type: IND-AFB)
-
Shaft clamp reversible for central mounting for damper shafts ø12.7 / 19.0 / 25.4 mm (Type: K7-2)
-
Ball joint suitable for damper crank arm KH8 / KH10 (Type: KG10A)
-
Actuator arm for 3/4" shafts, clamping range ø10...22 mm, Slot width 8.2 mm (Type: KH-AFB)
-
Form fit insert 10x10 mm, Multipack 20 pcs. (Type: ZF10-NSA-F)
-
Mounting kit for linkage operation for flat and side installation (Type: ZG-AFB)
-
Anti-rotation mechanism 230 mm, Multipack 20 pcs. (Type: Z-ARS230L)
-
Hand crank 63 mm (Type: ZKN2-B)
For more information and to explore our range of Belimo products, visit our website at https://ecospares.co.uk/collections/belimo. If you need any assistance, please get in touch with us on 01772 284 626.