TFB24-SR-S

Description:

For fail-safe, modulating control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturers specifications. The actuator is mounted directly to a damper shaft from 1/4 up to 1/2 in diameter by means of its universal clamp, 1/2 shaft centered at delivery. A crank arm and several mounting brackets are available for applications where the actuator cannot be direct coupled to the damper shaft. The actuator operates in response to a 2 to 10 VDC, or with the addition of a 500 resistor, a 4 to 20 mA control input from an electronic controller or positioner. A 2 to 10 VDC feedback signal is provided for position indication.

The TF -S versions are provided with one built-in auxiliary switch. This SPDT switch is provided for safety interfacing or signaling, for example, for fan start-up. The switching function is adjustable between 0 and 95.

Features:

• Torque: 22in-lb [2.5Nm]
• Voltage AC/DC: AC/DC
• Angle of Rotation: 95
• Direction of Rotation (Fail-Safe): Reversible with cw/ccw mounting
• Shaft Diameter 1/4…1/2″ round centers on 1/2″
• Actuator Type: Spring return
• Auxiliary Switches: 1 SPDT
• Application: Air
• Control Type: Modulating
• Degree of Protection: IP42, NEMA2, ULEnclosureType2
• Running Time (Fail-safe):<25s
• Running Time (Motor): 95s constant independent of load

Accessories:

• BelimoWTF US Mountng Linkage to TF actuator

Also See:

• TFB120 Spring Return Actuator
• TFB120-S Spring Return Actuator

Resources:

• TFB24-SR-S Spring Return Actuator Technical Literature
• TF Spring Return Actuator Installation Instructions