Belimo Aircontrols (USA), Inc. LF24-SR US LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque at Controls Central

Belimo Aircontrols (USA), Inc. LF24-SR US LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque

Brand: Belimo Aircontrols (USA), Inc.

SKU: LF24SRUS

	Unit Price
List Price	$681.00
Your Price	$306.45	You Save	$374.55 (55.0%)

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LF Series DIrect coupled spring return actuator, 35 in-lb minimum torque

Application	For fail-safe, modulating control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer?s specifications. The actuator is mounted directly to a damper shaft from 3/8? up to 1/2? in diameter by means of its universal clamp, 1/2? shaft centered at delivery. For shafts up to 3/4? use K6-1 accessory. 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.

Application

For fail-safe, modulating control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer?s specifications. The actuator is mounted directly to a damper shaft from 3/8? up to 1/2? in diameter by means of its universal clamp, 1/2? shaft centered at delivery. For shafts up to 3/4? use K6-1 accessory. 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.

Operation	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. The LF series provides 95ï¿½ of rotation and is provided with a graduated position indicator showing 0 to 95ï¿½. The LF24-SR US uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuator?s exact fail-safe position. The ASIC monitors and controls the brushless DC motor?s 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.

Operation

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. The LF series provides 95ï¿½ of rotation and is provided with a graduated position indicator showing 0 to 95ï¿½. The LF24-SR US uses a brushless DC motor which is controlled by an Application Specific Integrated Circuit (ASIC) and a microprocessor. The microprocessor provides the intelligence to the ASIC to provide a constant rotation rate and to know the actuator?s exact fail-safe position. The ASIC monitors and controls the brushless DC motor?s 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.

Typical Specification	Spring return control damper actuators shall be direct coupled type which require no crank arm and linkage and be capable of direct mounting to a shaft up to a 3/4? diameter and center on a 1/2? shaft (default). Actuator shall deliver a minimum output torque of 35 in-lbs. The actuator must provide modulating damper control 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. Actuators shall use a brushless DC motor controlled by a microprocessor and be protected from overload at all angles of rotation. Run time shall be constant, and independent of torque. A 2 to 10 feedback signal shall be provided for position feedback. The actuator must be designed so that they may be used for either clockwise or counter clockwise failsafe operation. Actuators shall be cULus listed, have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo.

Typical Specification

Spring return control damper actuators shall be direct coupled type which require no crank arm and linkage and be capable of direct mounting to a shaft up to a 3/4? diameter and center on a 1/2? shaft (default). Actuator shall deliver a minimum output torque of 35 in-lbs. The actuator must provide modulating damper control 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. Actuators shall use a brushless DC motor controlled by a microprocessor and be protected from overload at all angles of rotation. Run time shall be constant, and independent of torque. A 2 to 10 feedback signal shall be provided for position feedback. The actuator must be designed so that they may be used for either clockwise or counter clockwise failsafe operation. Actuators shall be cULus listed, have a 5 year warranty, and be manufactured under ISO 9001 International Quality Control Standards. Actuators shall be as manufactured by Belimo.

Product Family

Model Number	Decription	Manufacturer	Price	Avail. Qty
LF120SUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$288.45	175	Add To Cart
LF120US	LF Series Direct Coupled Spring Return Actuator, 3	Belimo Aircontrols (USA), Inc.	$248.85	195	Add To Cart
LF230SUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$346.50	1	Add To Cart
LF230US	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$306.45	6	Add To Cart
LF243SUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$312.75	5	Add To Cart
LF243US	LF Series Direct Coupled Spring Return Actuator, 3	Belimo Aircontrols (USA), Inc.	$272.70	75	Add To Cart
LF24MFT20US	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$386.55	0	Add To Cart
LF24MFTS20US	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$425.25	0	Add To Cart
LF24MFTSUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$387.90	15	Add To Cart
LF24MFTUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$348.75	139	Add To Cart
LF24SREUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$331.20	20	Add To Cart
LF24SRSUS	LF Series Direct Coupled Spring Return Actuator, 3	Belimo Aircontrols (USA), Inc.	$346.50	62	Add To Cart
LF24SRUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$306.45	456	Add To Cart
LF24SUS	LF Series Direct Coupled Spring Return Actuator, 3	Belimo Aircontrols (USA), Inc.	$263.70	147	Add To Cart
LF24US	LF Series Direct Coupled Spring Return Actuator, 3	Belimo Aircontrols (USA), Inc.	$224.55	222	Add To Cart
LFC243RUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$310.50	0	Add To Cart
LFC243SUS	LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque	Belimo Aircontrols (USA), Inc.	$348.75	0	Add To Cart

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Cross Reference

Belimo Aircontrols (USA), Inc.	LF24-SR US

Functional

Honeywell, Inc.	VC7936ZZ11/U

Manufacturer Suggested Replacement

Belimo Aircontrols (USA), Inc.	LF24-SR US

Siemens Building Technologies	GMA161.1P
Comment	Elec. Damper Actuator

Manufacturer Suggested Replacements

Belimo Aircontrols (USA), Inc.	LF24-SR US

Siemens Building Technologies	GMA161.1P
Comment	Elec. Damper Actuator

Manufacturer Suggested Replacements

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Belimo Aircontrols (USA), Inc. LF24-SR US LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque

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