The LF24 is a 24VAC spring return direct coupled damper actuator that is designed for on-off, fail-safe control of dampers in HVAC systems. Actuator sizing . Belimo Aircontrols (USA), Inc. LF24 (-S) US. On-off, spring return failsafe, 24 V. ®. Torque min. 35 in-lb, for control of air dampers. Application. For on-off, fail-safe. enclosure must be used to shield the actuator (See Belimo Mechanical Acces- . The LF24, modulating actuators (LFSR US, LF US, LFMFT US) are.

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For proportional modulation of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturers specifications.

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 W 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 or master-slave applications. The LF series provides 95 of rotation and is provided with a graduated position indicator showing 0 to The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuators exact fail-safe position.

The ASIC monitors and controls the brushless DC motors rotation and provides a digital rotation sensing function to prevent damage to the actuator in a stall condition. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches.

Power consumption is reduced in holding mode. Welcomeyou have 0 items in your cart Sign-up View Cart Checkout. We ship to Canada.

LFSR-E US, Belimo LFSR-E US, Damper Actuator, Spring,ECON,35inlb,V,24V,MinPos

You will be prompted to enter your password on the next page. Create an account Forgot Password? Personalization If needed, use the lg24 below to type in any additional actuator configuration required for your order: You may not enter more than characters for ‘Actuator Customization’. Actuator Customization characters remaining.


Add to a new shopping list. The LF series actuators provide true spring return operation for reliable fail-safe application and positive close-off on air tight dampers. The spring return system provides consistent torque to the damper with, and without, power applied to the actuator.

Belimo Lf24-sr US Spring Return Actuator LF24SRUS

This SPDT switch is provided for safety interfacing or signaling, for example, for fan start-up. The switching function is adjustable between beliko and Technical Data Sheet Installation Manual. Product Reviews Rate This Product: Welcomeyou have 0 items in your cart Sign-up View Cart Checkout site search. Actuator Customization characters remaining Quantity: Electronic throughout 0 to 95 rotation.

Blauberg BELIMO LF24

Direction of Rotation motor. Reversible with built-in switch.

Direction of Rotation fail-safe. Visual indicator, 0 to 95 0 is spring return position. Quantity Discounts Quantity Amount 5 to