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. |
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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 | 2.5 W |
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| Power Consumption Holding | 1 W |
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| Transformer Sizing | 5 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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| Input Impedance | 100 k ? for 2 to 10 VDC (0.1 mA), 500 ? for
4 to 20 mA |
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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) | 150 sec constant, independent of load |
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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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| Operating Range Y | 2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 ?,
1/4 W resistor) |
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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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| Feedback Output U | 2 to 10 VDC (max 0.7 mA) for 95� |
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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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| SGA24 | Positioner control for modualting actuators (surface mount). |
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| SGF24 | Positioner control for modulating actuators (flush mount). |
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| ADS-100 | Analog to digital switch for modulating actuators. |
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| ZG-R01 | 4 to 20 mA adaptor, 500�, 1/4 W resistor w 6? pigtail wires. |
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| ZG-X40 | 120 to 24 VAC, 40 VA transformer. |
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| PTA-250 | Pulse width modulation interface for modulating actuators. |
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| IRM-100 | Input rescaling module for modulating actuators. |
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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-R02 | 50% voltage divider kit (resistors with wires). |
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| ZG-SGF | Mounting plate for SGF. |
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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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| 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 LF24-SR-S 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. The LF24-SR-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- SR-S US is double insulated so an electrical ground in not necessary |
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| 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. |
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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
|
180
|
Add To Cart
|
|
LF120US
|
LF Series Direct Coupled Spring Return Actuator, 3
|
Belimo Aircontrols (USA), Inc.
|
$248.85
|
147
|
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
|
67
|
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
|
13
|
Add To Cart
|
|
LF24MFTUS
|
LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
|
Belimo Aircontrols (USA), Inc.
|
$348.75
|
134
|
Add To Cart
|
|
LF24SREUS
|
LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
|
Belimo Aircontrols (USA), Inc.
|
$331.20
|
16
|
Add To Cart
|
|
LF24SRSUS
|
LF Series Direct Coupled Spring Return Actuator, 3
|
Belimo Aircontrols (USA), Inc.
|
$346.50
|
65
|
Add To Cart
|
|
LF24SRUS
|
LF Series Direct Coupled Spring Return Actuator, 35 in-lb minimum torque
|
Belimo Aircontrols (USA), Inc.
|
$306.45
|
360
|
Add To Cart
|
|
LF24SUS
|
LF Series Direct Coupled Spring Return Actuator, 3
|
Belimo Aircontrols (USA), Inc.
|
$263.70
|
135
|
Add To Cart
|
|
LF24US
|
LF Series Direct Coupled Spring Return Actuator, 3
|
Belimo Aircontrols (USA), Inc.
|
$224.55
|
214
|
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
|
Cross Reference
| Belimo Aircontrols (USA), Inc. | LF24-SR-S US |
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| Siemens Building Technologies | GMA166.1U |
| 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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