Belimo Aircontrols (USA), Inc. AFB24-SR Damper Actuator

Order QuantityUnit Price
1 - 5$429.75
6 - 11$416.86Save 3%
12+$403.97Save 6%
In Stock! Ships in 24 hours
Availability: 492


  • Integrated pressure sensor for standalone airflow control for rotary, linear, and in-duct applications.
  • Linear models with integrated airflow sensor D3 flow sensors for challenging push-pull applications.
  • Fast commissioning and adjustment on select devices via NFC.
  • Maintains pressure independent operation eliminating the need for manual balancing, reducing installation and commissioning
  • Available control types are compatible with industry standards such as analog, BACnet MS/TP and Modbus RTU.

Damper Actuator,180 in-lb,Spring Return,24V,Modulating

Belimo damper actuators are designed for use in a wide variety of HVAC applications for ensuring performance, reliability, and lower power consumption. Our comprehensive torque range (18 to 1,400 inlb) is suited for damper sizes as small as 4-inch round allowing the ability to mount on standard damper shafts or directly on jackshafts. Actuators are used for control dampers, air handlers, economizer units, VAV terminal units, fan coil units, fan shutters, and unit ventilators.

ApplicationFor 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 up to 1.05? in diameter by means of its universal clamp. 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. Not to be used for a master-slave application
Weight4.6 lb [2.1 kg]
Servicingmaintenance free
Power Supply24 VAC�20%, 50/60Hz, 24 VDC+20%/-10%
Power Consumption Running5.5 W
Power Consumption Holding3 W
Transformer Sizing8.5 VA (class 2 power source)
Electrical Connection3 ft [1 m], 18 GA appliance cable with 1/2? conduit connector
Overload Protectionelectronic throughout 0� to 95� rotation
Input Impedance100 k � for 2 to 10 VDC (0.1 mA), 500 � for 4 to 20 mA
Angle of Rotation95� (adjustable with mechanical end stop, 35� to 95�)
Direction of Rotation (Motor)reversible with built-in switch
Manual Override5 mm hex crank (3/16? Allen), supplied
Running Time (Motor)95 sec
Ambient Temperature Range-22�F to +122�F [-30�C to +50�C]
Storage Temperature Range-40�F to +176�F [-40�C to +80�C]
HousingNEMA 2, IP54, UL enclosure type 2
Agency ListingscULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02, CE acc. to 2004/108/EC
Noise Level (Motor)�40 dB (A)
Quality StandardISO 9001
Operating Range Y2 to 10 VDC, 4 to 20 mA w/ ZG-R01 (500 �, 1/4 W resistor)
Direction of Rotation (Fail-Safereversible with CW/CCW mounting
Position Indicationvisual indicator, 0� to 95� (0� is full spring return position)
Running Time (Fail-Safe)<20 sec @ -4�F to 122�F [-20�C to 50�C], < 60 sec @ -22�F [-30�C]
Noise Level (Fail-Safe)<62 dB (A)
Feedback Output U2 to 10 VDC, 0.5 mA max
Housing Materialzinc coated metal and plastic casing
Electrical protectionactuators are double insulated
Humiditymax. 95% RH non-condensing
Shaft Diameter1/2? to 1.05? round, centers on 1/2? and 3/4? with insert, 1.05? without insert
Torque180 in-lbs [20 Nm] minimum
AF-PAnti-rotation bracket AF/NF.
SH8Push rod for KG6 & KG8 ball joints (36? L, 5/16? diameter).
ZG-100Univ. right angle bracket (17? H x 11-1/8? W x 6? base).
ZG-101Univ. right angle bracket (13? H x 11? W x 7-7/16? base).
ZG-DC1Damper clip for damper blade, 3.5? width
ZG-DC2Damper clip for damper blade, 6? width.
ZS-100Weather shield - galvaneal (13? L x 8? W x 6? D).
ZS-150Weather shield - PC w/ foam seal (16? L x 8-3/8? W x 4? D).
ZS-260Explosion proof housing.
ZS-300NEMA 4X, 304 stainless steel enclosure.
AV8-259.8? shaft extension for 5/16? to 1? diameter shafts.
PS-100Actuator power supply and control simulator.
SGA24Positioner control for modualting actuators (surface mount).
SGF24Positioner control for modulating actuators (flush mount)
ADS-100Analog to digital switch for modulating actuators.
ZG-R014 to 20 mA adaptor, 500�, 1/4 W resistor w 6? pigtail wires.
ZG-X40120 to 24 VAC, 40 VA transformer.
PTA-250Pulse width modulation interface for modulating actuators.
IRM-100Input rescaling module for modulating actuators.
IND-AFBAFB(X)/NFB(X) position indicator.
KG8Ball joint for 5/16? diameter rod, 90�, galvanized steel.
KH-AFBAFB(X)/NFB(X) crankarm (with 3/4? dia. shaft pass through).
ZG-AFB118AFB(X)/NFB(X) crankarm adaptor kit.
KG10ABall joint for 3/8? diameter rod, zinc plated.
KH10Univ. crankarm, slot 21/64? w, for 9/16? to 1? dia. shafts.
SH10Push rod for KG10A ball joint (36? L, 3/8? diameter).
ZG-120Jackshaft mounting bracket.
ZG-JSA-31.05? diameter jackshaft adaptor (12? L).
TF-CC USCable conduit connector, 1/2?.
ZG-SGFMounting plate for SGF.
ZG-109Right angle bracket for ZS-260.
ZG-110Stand-off bracket for ZS-260.
ZG-JSA-11? diameter jackshaft adaptor (11? L).
ZG-JSA-21-5/16? diameter jackshaft adaptor (12? L).
ZS-101Base plate for ZS-100.
ZS-300-5NEMA 4X, 316L stainless steel enclosure.
K7-2Standard AFB(X)/NFB(X) clamp (1/2? to 1.05?).
KH12Univ. crankarm, slot 21/64? w, for 3/4? to 1? dia. shafts.
KH8Univ. crankarm,slot 21/64? w,for 3/8? to 11/16? dia. shafts.
Z-AFClassic AF/NF to AFB(X)/NFB(X) retrofit mounting bracket.
ZG-118AFB(X)/NFB(X) U bracket (5-7/8? H x 5-1/2? W x 2-19/32? D).
ZG-AFBAFB(X)/NFB(X) crankarm adaptor kit.
OperationThe AF..24-SR 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 constant torque to the damper with, and without, power applied to the actuator. The AF..24-SR series provides 95� of rotation and is provided with a graduated position indicator showing 0� to 95�. The AF..24-SR 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. The AF..24-SR actuator is shipped at +5� (5� from full fail-safe) to provide automatic compression against damper gaskets for tight shut-off.
Typical SpecificationSpring return control damper actuators shall be direct coupled type which require no crank arm and linkage and be capable of direct mounting to a jackshaft up to a 1.05? diameter. 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 or positioner. The actuators must be designed so that they may be used for either clockwise or counter clockwise fail-safe operation. 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 VDC feedback signal shall be provided for position feedback. Actuators with auxiliary switches must be constructed to meet the requirements for Double Insulation so an electrical ground is not required to meet agency listings. Actuators shall be cULus listed and 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 NumberDecriptionManufacturerPriceAvail. Qty 
AFB24SR Damper Actuator Belimo Aircontrols (USA), Inc. $429.75 492    Add To Cart

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


Not reviewed yet, be the first to write one!

Add Review