{"product_id":"afb24-sr-s-belimo-modulating-spring-return-damper-actuator-20-nm-24v","title":"AFB24-SR-S | Belimo Modulating Spring Return Damper Actuator 20 Nm 24V","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"122\" data-end=\"397\"\u003eThe Belimo AFB24-SR-S is a spring-return damper actuator designed for precise modulating control of HVAC air dampers requiring 20 Nm of torque. It operates on AC\/DC 24 V power and integrates auxiliary switches for reliable position feedback and system interlocking.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 646.594px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eBelimo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eDampers \u0026amp; Actuators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eAFB24-SR-S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eDamper Actuators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eAC\/DC 24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003eNominal Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003eAC 19.2…28.8 V \/ DC 21.6…28.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 58.7812px;\"\u003e\u003cstrong\u003ePower Consumption (Operation)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 58.7812px;\"\u003e5.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 58.7812px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 58.7812px;\"\u003e\u003cstrong\u003ePower Consumption (Rest)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 58.7812px;\"\u003e3 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003eTransformer Sizing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e8.5 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eControl Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003e2…10 V (4…20 mA with external resistor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eInput Impedance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003e100 kΩ (2…10 V), 500 Ω (4…20 mA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003ePosition Feedback\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e2…10 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eTorque Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003e180 in-lb (20 Nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eAngle of Rotation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003e35…95°, adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003eRunning Time (Motor)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e95 s \/ 90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003eRunning Time (Fail-Safe)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e\u0026lt;20 s @ -20…50°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003eAuxiliary Switches\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e2x SPDT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 39.1875px;\"\u003e\u003cstrong\u003eElectrical Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 39.1875px;\"\u003e18 AWG cables, 1 m with 1\/2\" NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eNoise Level\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003e40 dB(A) motor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 22.2662%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.3702%; height: 19.5938px;\"\u003e5.7 lb (2.6 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About\u003cspan data-sheets-root=\"1\"\u003e AFB24-SR-S\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe AFB24-SR-S is part of Belimo’s AFB series of spring-return damper actuators developed for dependable airflow control in commercial HVAC systems. It features a double-insulated housing with electronic overload protection across the full operating range to maintain consistent torque and actuator integrity. The actuator supports modulating control via a 2…10 V signal and can be configured for 4…20 mA control using an external resistor, ensuring compatibility with modern building automation platforms. Adjustable mechanical end stops, selectable rotation direction, and integrated auxiliary switches provide installation flexibility and accurate damper positioning.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpring Return Fail-Safe Mechanism: Integrated spring return function drives the damper to a predefined safe position in the event of power loss, ensuring airflow safety, equipment protection, and compliance with HVAC safety requirements.\u003c\/li\u003e\n\u003cli\u003e20 Nm Rated Torque Output: Provides a consistent 180 in-lb (20 Nm) torque output across the full operating range, supporting reliable actuation of medium to large air dampers under varying pressure conditions.\u003c\/li\u003e\n\u003cli\u003eModulating Control Interface: Supports precise airflow modulation using a 2…10 V control signal, with optional 4…20 mA operation via external resistor, enabling seamless integration with modern building automation and DDC systems.\u003c\/li\u003e\n\u003cli\u003eDual Auxiliary SPDT Switches: Equipped with two adjustable SPDT auxiliary switches that allow accurate position indication, interlocking, and sequencing with other HVAC components or control logic.\u003c\/li\u003e\n\u003cli\u003eAdjustable Mechanical Rotation Range: Features factory-installed mechanical end stops that allow rotation angle adjustment between 35° and 95°, supporting customized damper stroke requirements and preventing mechanical stress.\u003c\/li\u003e\n\u003cli\u003eSelectable Direction of Operation: Direction of motor rotation can be set via onboard switch, while the fail-safe direction is reversible through mounting orientation, simplifying installation and system configuration.\u003c\/li\u003e\n\u003cli\u003eManual Override Capability: Supplied with a hex crank for manual positioning, enabling commissioning, testing, or emergency operation without electrical power.\u003c\/li\u003e\n\u003cli\u003eLow Noise and Protected Design: Engineered for quiet operation with low motor and spring noise levels, combined with double insulation and electronic overload protection for long-term durability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe AFB24-SR-S delivers the reliability and precision required for controlled airflow modulation and dependable fail-safe damper control in commercial HVAC systems.\u003c\/p\u003e","brand":"Belimo","offers":[{"title":"Default Title","offer_id":49105055580416,"sku":"AFB24-SR-S","price":823.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/AFB24-SR-S-product_retina.jpg?v=1785538977","url":"https:\/\/alotechparts.com\/products\/afb24-sr-s-belimo-modulating-spring-return-damper-actuator-20-nm-24v","provider":"Alo Tech Solutions","version":"1.0","type":"link"}