Description
The Belimo SRFA-S2-R actuator is a high-performance rotary actuator designed for precise control of rotary valves and butterfly valves in heating, ventilation, and air-conditioning systems. Engineered for reliability and efficiency, this actuator is suitable for a wide range of applications, ensuring optimal performance and energy savings.
The SRFA-S2-R actuator is equipped with a universal power supply module, allowing it to operate with various AC and DC supply voltages. It features a robust torque motor and integrated auxiliary switches, making it ideal for demanding environments. This actuator provides reliable fail-safe functionality and manual override options for enhanced control and safety.
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
- Auxiliary Switch: 2x SPDT, 1x 10% / 1x 11...100%
- Switching Capacity: 1 mA...3 A (0.5 A inductive), DC 5 V...AC 250 V
- Connection Supply/Control: Cable 1 m, 2x 0.75 mm²
- Connection Auxiliary Switch: Cable 1 m, 6x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data
- Torque Motor: 20 Nm
- Torque Fail-Safe: 20 Nm
- Direction of Motion Fail-Safe: Selectable (Deenergised NC, valve closed or Deenergised NO, valve open)
- Manual Override: Hand crank and locking switch
- 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)
- 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
- Protection Class Auxiliary Switch IEC/EN: 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
Environmental Data
- Type of Action: Type 1.AA.B
- Rated Impulse Voltage Supply/Control: 4 kV
- Rated Impulse Voltage Auxiliary Switch: 2.5 kV
- Pollution Degree: 3
- Ambient Humidity Max.: 95% RH, non-condensing
- Ambient Temperature: 0...50°C [32...122°F]
- Storage Temperature: -40...80°C [-40...176°F]
- Servicing: Maintenance-free
Mechanical Data
- Connection Flange: F03/F04/F05
- Weight: 2.3 kg
Simple Direct Mounting: Easily mountable on rotary or butterfly valves with selectable mounting orientation in 90° steps.
Manual Override: Operable manually via hand crank, with lockable positions.
Adjustable Angle of Rotation: With mechanical end stops.
High Functional Reliability: Overload protection with automatic stop at end positions.
Flexible Signalling: Includes one fixed and one adjustable auxiliary switch for signaling 10% or 11...100% angle of rotation.
Accessories
- Form-Fit Adapters: Various sizes and types are available to match different spindle head geometries. (Refer to the PDF for specific adapter types and sizes)
Notes
- Caution: Ensure power supply voltage and proper installation by authorized specialists.
- Disposal: Device contains electrical components and must not be disposed of as household waste.
For more information and to explore our range of Belimo products, visit our website at https://www.ecospares.co.uk/collections/belimo. If you need any assistance, please call us on 01772 284 626.
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