SRFA-S2-R - Belimo Rotary actuator fail-safe (Retrofit) NC NC, 20 Nm, AC / DC 24...230 V | ideal for ball valves

Find all parts for your ventilation system at iacs, the Free Delivery and 1-2 Delivery is available for all the Belimo Actuators in stock

The Belimo SRFA-S2-R is a type of Actuator used in HVAC and ventilation systems.

This kind of Actuator rotates the damper in order to control it.

The force applied by the Torque of the SRFA-S2-R is 20 Nm.

This Rotary Actuator needs to be supported by a power supply of AC / DC 24...230 V.

Find the appropriate Belimo Actuator for your system at the greatest price at iacs.

If you have questions about size or installation, consult the Belimo custom datasheet above or send an email to iacs to get personalised guidance.

SRFA-S2-R - Rotary actuator fail-safe (Retrofit) NC NC, 20 Nm, AC / DC 24...230 V

Retrofit rotary actuator for rotary
valves and butterfly valves
• Torque motor 20 Nm
• Nominal voltage AC 24...240 V /
DC 24...125 V
• Control Open/close
• with 2 integrated auxiliary switches

Mode of operation: The actuator is equipped with a universal voltage feed module that can utilise supply voltages of AC 24 ... 240V and DC 24 ... 125V. The actuator moves the valve to the operating position at the same time as tensioning the return spring. The valve is turned back to the emergency position by spring force when the supply voltage is interrupted. Manual override: By using the hand crank the valve can be operated manually and engaged with the locking switch at any position. Unlocking is carried out manually or automatically by applying the operating voltage.

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 2 x SPDT, 1 x 10% / 1 x 11...90%
• Switching capacity auxiliary switch 1 mA...3 (0.5) A, AC 250 V
• Connection supply / control Cable 1 m, 2 x 0.75 mm²
• Connection auxiliary switch Cable 1 m, 6 x 0.75 mm²
• Parallel operation Yes (note the performance data)

Functional data:

• Torque motor Min. 20 Nm
• Torque spring return Min. 20 Nm
• Direction of rotation spring-return Deenergised NC, valve closed (A - AB = 0%)
• Manual override By means of hand crank and locking switch
• Angle of rotation 90°
• Running time motor 75 s / 90°
• Running time emergency setting position < 20 s / 90°
• Sound power level motor max. 45 dB(A)
• Position indication Mechanical
• Service life Min. 60,000 emergency positions

Safety:

• Protection class IEC/EN II Protective insulated
• Protection class UL II Protective insulated
• Protection class auxiliary switch IEC/EN II Protective insulated
• Degree of protection IEC/EN IP54
• Degree of protection NEMA/UL NEMA 2, UL Enclosure Type 2
• EMC CE according to 2004/108/EC
• Low voltage directive CE according to 2006/95/EC
• Certification IEC/EN IEC/EN 60730-1 and IEC/EN 60730-2-14
• Certification UL cULus according to UL 60730-1A, UL 60730-2-14 and CAN/CSA E60730-1:02
• Mode of operation Type 1.AA.B
• Rated impulse voltage supply / control 4 kV
• Rated impulse voltage auxiliary switch 2.5 kV
• Control pollution degree 3
• Ambient temperature -30...50°C
• Non-operating temperature -40...80°C
• Ambient humidity 95% r.h., non-condensing
• Maintenance Maintenance-free

Weight: Approx. 2.5 kg