Description
The Belimo NRFA Rotary Actuator is a robust and reliable solution for controlling HVAC system ball valves. With its universal power supply and fail-safe functionality, this actuator ensures high performance and safety in various applications. The NRFA model is suitable for AC and DC voltage supplies, making it a versatile choice for modern engineering needs.
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: 6 W
- Power Consumption in Rest Position: 2.5 W
- Power Consumption for Wire Sizing: 9.5 VA
- Connection Supply / Control: Cable 1 m, 2x 0.75 mm²
- Parallel Operation: Yes (note the performance data)
Functional Data:
- Torque Motor: 10 Nm
- Torque Fail-Safe: 10 Nm
- Direction of Motion Fail-Safe: Deenergised NC, valve closed (A – AB = 0%)
- Direction of Motion Note: For valves with L-bore (A – AB = 100%)
- Manual Override: By means of 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: Min. 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
- 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: 2.0 kg
Operating Mode: Equipped with a universal power supply module for AC and DC voltages. Ensures valve returns to fail-safe position by spring force upon power interruption.
Simple Direct Mounting: Easy installation on ball valves with a single screw. Mounting orientation adjustable in 90° steps.
Manual Override: Operable manually via hand crank with locking switch. Automatic or manual unlocking.
Adjustable Angle of Rotation: Configurable with mechanical end stops.
High Functional Reliability: Overload protection, no limit switches required, auto-stop at the end position.
Accessories and Additional Parts:
- Further documentation and accessories for water applications, ball valves, installation instructions, and project planning notes are available on our website.
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 call us on 01772 284 626.
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