LF Series Direct coupled spring return actuator, 35 in-lb minimum torque| Actuator Type | Spring return |
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| Control Type | Open-close only |
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| Electrical Connection | cable |
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| Direction of Rotation (Fail-Safe) | reversible with CW/CCW mounting |
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| Direction of Rotation (Motor) | reversible with built-in switch |
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| Power Consumption (Holding) | 2.5 W |
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| Power Consumption (Running) | 5 W |
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| Degree of Protection | NEMA 2 |
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| Shaft Diameter | 3/8" to 1/2" round, centers on 1/2" |
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| Application | For On/Off, fail-safe control of dampers in HVAC systems. Actuator sizing should be done in accordance with the damper manufacturer?s specifications. Control is On/Off from an auxiliary contact or a manual switch. 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. |
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| Servicing | maintenance free |
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| Power Supply | 24 VAC � 20%, 50/60 Hz, 24 VDC � 10% |
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| Power Consumption Running | 5 W |
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| Power Consumption Holding | 2.5 W |
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| Transformer Sizing | 7 VA (class 2 power source) |
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| Electrical Connection | (2) 3ft [1m], 18 GA appliance cables with
1/2? conduit connectors |
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| Overload Protection | electronic throughout 0� to 95� rotation |
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| Angle of Rotation | Max. 95� |
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| Direction of Rotation (Motor) | reversible with built-in switch |
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| Running Time (Motor) | <40 to 75 sec |
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| Ambient Temperature Range | -22�F to 122�F [-30�C to 50�C] |
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| Storage Temperature Range | -40�F to 176�F [-40�C to 80�C] |
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| Agency Listings | cULus acc. To UL 873 and CAN/CSA C22.2 No. 24-93 |
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| Noise Level (Motor) | <50 dB (A) |
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| Direction of Rotation (Fail-Safe | reversible with CW/CCW mounting |
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| Position Indication | visual indicator, 0� to 95� (0� is full spring return position) |
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| Running Time (Fail-Safe) | <25 sec @ -4�F to 122�F [-20�C to 50�C], <
60 sec @ -22�F [-30�C] |
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| Noise Level (Fail-Safe) | <62 dB (A) |
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| Ambient Humidity | max. 95% RH non-condensing |
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| Housing Material | zinc coated steel |
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| Electrical protection | actuators are double insulated |
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| Auxiliary Switch | 1 x SPDT, 3A resistive (0.5A inductive) @ 250
VAC, adjustable 0� to 95� (double insulated) |
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| Shaft Diameter | 3/8? to 1/2? round, centers on 1/2? |
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| Torque | 35 in-lbs [4 Nm] minimum |
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| SH8 | Push rod for KG6 & KG8 ball joints (36? L, 5/16? diameter). |
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| ZG-DC1 | Damper clip for damper blade, 3.5? width. |
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| ZG-DC2 | Damper clip for damper blade, 6? width. |
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| ZS-100 | Weather shield - galvaneal (13? L x 8? W x 6? D). |
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| ZS-150 | Weather shield - PC w/ foam seal (16? L x 8-3/8? W x 4? D). |
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| ZS-260 | Explosion proof housing. |
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| ZS-300 | NEMA 4X, 304 stainless steel enclosure. |
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| TOOL-06 | 8 mm and 10 mm wrench. |
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| PS-100 | Actuator power supply and control simulator. |
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| ZG-X40 | 120 to 24 VAC, 40 VA transformer.ZG-CBLS Electrical junction box for LF. |
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| KG8 | Ball joint for 5/16? diameter rod, 90�, galvanized steel. |
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| KG10A | Ball joint for 3/8? diameter rod, zinc plated. |
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| SH10 | Push rod for KG10A ball joint (36? L, 3/8? diameter). |
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| ZG-109 | Right angle bracket for ZS-260. |
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| ZG-110 | Stand-off bracket for ZS-260. |
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| ZS-101 | Base plate for ZS-100. |
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| ZS-300-5 | NEMA 4X, 316L stainless steel enclosure. |
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| ZS-300-C1 | 1/2? shaft adaptor, standard wtih ZS-300(-5). |
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| ZS-300-C2 | 3/4? shaft adaptor for ZS-300(-5). |
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| ZS-300-C3 | 1? shaft adaptor for ZS-300(-5). |
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| KH12 | Univ. crankarm, slot 21/64? w, for 3/4? to 1? dia. shafts. |
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| KH8 | Univ. crankarm,slot 21/64? w,for 3/8? to 11/16? dia. shafts. |
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| AV6-20 | 6.7? shaft extension for 1/4? to 3/4? diameter shafts. |
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| IND-LF | LF position indicator. |
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| K6 US | Standard LF clamp (3/8? to 1/2?). |
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| K6-1 | LF clamp (1/2? to 3/4?). |
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| KG6 | Ball joint for 5/16? diameter rod, zinc plated. |
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| KH6 | Univ. crankarm, slot 1/4? w, for 3/8? to 11/16? dia. shafts. |
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| KH-LF | LF crankarm (with 1/2? diameter shaft pass through). |
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| KH-LFV | V-bolt Kit for KH-LF. |
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| LF-P | Anti-rotation bracket LF. |
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| ZDB-LF | Angle of rotation Limiter for LF. |
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| ZF8-LF | 8x8 mm form fit adaptor for LF. |
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| ZG-112 | LF right angle bracket (4-1/2? H x 5-1/2? W x 2-1/2? D). |
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| ZG-LF112 | LF crankarm adaptor kit (includes ZG-112). |
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| ZG-LF2 | LF crankarm adaptor kit (T bracket included). |
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| ZG-LMSA-1 | Shaft extension for 3/8? diameter shafts (4? L). |
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| ZG-LMSA-1/2-5 | Shaft extension for 1/2? diameter shafts (5? L). |
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| ZG-CBLS | Electrical junction box for LF. |
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| ZG-LF2 LF | crankarm adaptor kit (T bracket included). |
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| 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 95� of rotation and is provided with a graduated position indicator showing 0� to 95�. The actuator may be stalled anywhere in its normal rotation without the need of mechanical end switches. Power consumption is reduced in holding mode. The LF24-S US version is 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�. The auxiliary switch in the LF24-S US is double insulated so an electrical ground connection is not necessary |
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| Typical Specification | On/Off spring return 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 be designed so that they may be used for either clockwise or counter clockwise failsafe operation. Actuators shall be protected from overload at all angles of rotation. If required, one SPDT auxiliary switch shall be provided with one switch having the capability of being adjustable. Actuators with auxiliary switch must be constructed to meet the requirement for Double Insulation so an electrical ground connection is not required to meet agency listings. 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. |
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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
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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
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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
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Add To Cart
|
|
LF243US
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LF Series Direct Coupled Spring Return Actuator, 3
|
Belimo Aircontrols (USA), Inc.
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$272.70
|
75
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Add To Cart
|
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LF24MFT20US
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
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Belimo Aircontrols (USA), Inc.
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$386.55
|
0
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Add To Cart
|
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LF24MFTS20US
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
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Belimo Aircontrols (USA), Inc.
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$425.25
|
0
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Add To Cart
|
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LF24MFTSUS
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
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Belimo Aircontrols (USA), Inc.
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$387.90
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15
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Add To Cart
|
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LF24MFTUS
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
|
Belimo Aircontrols (USA), Inc.
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$348.75
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139
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Add To Cart
|
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LF24SREUS
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
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Belimo Aircontrols (USA), Inc.
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$331.20
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20
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Add To Cart
|
|
LF24SRSUS
|
LF Series Direct Coupled Spring Return Actuator, 3
|
Belimo Aircontrols (USA), Inc.
|
$346.50
|
62
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Add To Cart
|
|
LF24SRUS
|
LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
|
Belimo Aircontrols (USA), Inc.
|
$306.45
|
456
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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
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Add To Cart
|
|
LFC243RUS
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
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Belimo Aircontrols (USA), Inc.
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$310.50
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0
|
Add To Cart
|
|
LFC243SUS
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LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
|
Belimo Aircontrols (USA), Inc.
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$348.75
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0
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Add To Cart
|
Cross Reference
| Belimo Aircontrols (USA), Inc. | LF24-S US |
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| Siemens Building Technologies | GMA126.1U |
| Comment | Elec. Damper Actuator |
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| Manufacturer Suggested Replacements |
| Belimo Aircontrols (USA), Inc. | LF24-S US |
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| Siemens Building Technologies | GMA126.1U |
| Comment | Elec. Damper Actuator |
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| Manufacturer Suggested Replacements |
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All orders are shipped same-day if the order is received by 1:00 PM Central Time. We ship worldwide.
UPS Hoilday Delivery Schedule
For more infomation about Returns visit Returns
For more informatrion about Warranty visit Warranty page.
You can also find answers to some common questions on our FAQ page
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