Description
The Belimo SRFA-S2 is a robust and reliable rotary actuator designed for ball valves. Featuring a fail-safe system, this actuator is ideal for HVAC applications in industrial and commercial environments. Its design ensures seamless integration into your system, high functional reliability, and simple installation.
Fail-Safe Operation:
The SRFA-S2 actuator ensures that the valve returns to its fail-safe position when the supply voltage is interrupted, providing secure and reliable performance.
Manual Override:
The actuator, equipped with a hand crank and locking switch, can be manually operated in case of power failure or for maintenance purposes.
Adjustable Angle of Rotation:
The mechanical end stops allow for easy adjustment of the actuator’s angle of rotation to fit specific application needs.
High Torque:
It delivers a motor torque of 20 Nm and a fail-safe torque of 20 Nm, making it suitable for a variety of demanding applications.
Flexible Signalling:
Two integrated auxiliary switches provide straightforward monitoring and control with settings between 10% and 100% of the actuator’s range.
Universal Power Supply:
The actuator supports a wide range of input voltages (AC 24...240 V / DC 24...125 V) for versatile application.
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: 1 m cable, 2x 0.75 mm²
- Parallel Operation: Supported
Functional Data:
- Torque Motor: 20 Nm
- Torque Fail-Safe: 20 Nm
- Direction of Motion Fail-Safe: Valve closed (A – AB = 0%)
- Manual Override: Hand crank with locking switch
- Running Time Motor: 75 seconds for 90°
- Running Time Fail-Safe: <20 s (at -20 to 50°C) / <60 s (at -30°C)
- Sound Power Level: 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
- Degree of Protection (IEC/EN): IP54
- Degree of Protection (NEMA/UL): NEMA 2
- Enclosure (UL): Type 2
- EMC: CE certified (2014/30/EU)
- Low Voltage Directive: CE certified (2014/35/EU)
- Certification: IEC/EN 60730-1, IEC/EN 60730-2-14, cULus certified (UL60730-1A, UL60730-2-14)
Environmental Data:
- 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: -30 to 50°C
- Storage Temperature: -40 to 80°C
- Servicing: Maintenance-free
Mechanical Data:
- Weight: 2.4 kg
Why You Should Buy the Belimo SRFA-S2:
The SRFA-S2 actuator offers unmatched reliability and ease of use for HVAC systems. Its fail-safe function ensures that your system remains secure during power outages, while the flexible auxiliary switches and adjustable rotation provide great adaptability for different applications. With a universal power supply and robust build, this actuator fits a wide range of systems, saving you time and effort on installation and operation.
For more information and to explore our range of Belimo products, visit [ecospares.co.uk/collections/belimo](https://www.ecospares.co.uk/collections/belimo).
If you need assistance, feel free to reach us on 01772 284 626
