TRF24-SR - Belimo Spring-return actuator NC | ideal for ball valves

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The Belimo TRF24-SR is a kind of Actuator used in HVAC applications and air ventilation systems.

The Torque used by the TRF24-SR is 2.5 Nm.

The power supply requested for this Rotary Actuator is 24Vac/Vdc.

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Consult the Belimo custom datasheet above or contact iacs via email for personalised assistance if you have queries about size or installation.

TRF24-SR - Spring-return actuator NC

•    2 Nm, 90 s, 95°
•    AC / DC 24 V, modulating
•    Running time spring < 25 s
•    Control DC 0...10 V
•    Operating range DC 2...10 V
•    Position feedback DC 2...10 V
•    Direction of rotation reversible (right/left)

Features
 

• Mode of operation  The actuator is controlled by means of a standard control signal DC 0 ... 10 V. The actuator moves the damper to its normal working position while tensioning the return spring at the same time. If the power supply is interrupted, the energy stored in the spring moves the damper back to its safe position.


• Simple direct mounting Straightforward direct mounting on the ball valve with only one screw. The mounting position in relation to the ball valve can be selected in 90°<) steps.


• High functional reliability The actuator is overload-proof, requires no limit switches and automatically stops when the end stop is reached.


• Combination valve actuators Refer to the valve documentation for suitable valves, their permitted media temperatures and closing pressures.

•    Electrical Nominal voltage AC 24 V, 50/60 Hz DC 24 V
•    Power supply range AC 19.2 ... 28.8 V DC 21.6 ... 28.8 V
•    Power consumption In operation 2.5 W @ nominal torque At rest 1 W For wire sizing  4 VA
•    Connection Cable 1 m, 4 x 0.75 mm2
•    Parallel connection Yes (Note  performance data for supply!) 
•    Functional data Torque Motor Min. 2 Nm @ nominal voltage Spring return Min. 2 Nm
•    Control Control signal Y DC 0 ... 10 V, typical input impedance 100 kΩ Working range DC 2 ... 10 V
•    Position feedback (Measuring voltage) DC 2 ... 10 V, max. 0.5 mA
•    Direction of rotation Motor Adjustable with switch   resp Spring return TRF24-SR Deenergised NC, ball valve closed (A – AB = 0%) TRF24-SR-O Deenergised NO, ball valve open (A – AB = 100%)
•    Manual override No
•    Angle of rotation Max. 95°<)
•    Running time Motor 90 s / 90°<) Spring return <25 s at –20 ... 50°C / max. 60 s at –30°C
•    Noise level Motor Max. 35 dB (A) Spring return ~62 dB (A) 
•    Service life Min. 60’000 emergency settings
•    Position indication Mechanical
•    Safety Protection class III extra-low voltage
•    Degree of protection IP42 in all mounting positions
•    EMC CE according to 89/336/EEC 
•    Mode of operation Type 1 (to EN 60730-1)
•    Rated impulse voltage 0.8 kV (to EN 60730-1)
•    Control pollution degree 3  (to EN 60730-1)
•    Ambient temperature range –30 ... +50°C
•    Media temperature +5 ... +100°C (in ball valve)
•    Non-operating temperature –40 ... +80°C
•    Ambient humidity range 95% r.H., non-condensating (EN 60730-1)
•    Maintenance Maintenance-free
•    Dimensions / Weight Dimensions See «Dimensions» on page 2
•    Weight Approx. 600 g (without ball valve)