{"product_id":"belimo-nfb24-sr-s-damper-actuator-unit-quick-delivery","title":"NFB24-SR-S | Belimo Spring Return Damper Actuator 90 In Lb 24VACDC Modulating","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"122\" data-end=\"397\"\u003eThe Belimo NFB24-SR-S is a spring return damper actuator designed for precise modulating airflow control using a 24 VAC\/DC power supply. Delivering 90 in-lb torque and supporting 2–10 V control, it integrates auxiliary switching for accurate positioning and dependable fail-safe operation.\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%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eBelimo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eDamper Actuators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eNFB24-SR-S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eSpring Return Damper Actuators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eActuator Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eDamper Actuator\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eModulating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eControl Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e2…10 V (4…20 mA with resistor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eAC\/DC 24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eNominal Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eAC 19.2…28.8 V \/ DC 21.6…28.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eTorque Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e90 in-lb (10 Nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eSpring Return\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003ePower Consumption (Operation)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e3.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003ePower Consumption (Rest)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e2.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eTransformer Sizing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e6 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eAuxiliary Switches\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e2 × SPDT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003ePosition Feedback\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e2…10 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eAngle of Rotation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e35…95°, adjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eRunning Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e95 s \/ 90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eProtection Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eNEMA 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eElectrical Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003eDual 18 AWG cables, 1 m, 1\/2\" NPT\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 26.2073%;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 73.429%;\"\u003e4.9 lb (2.2 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 NFB24-SR-S\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe NFB24-SR-S is part of Belimo’s compact spring return damper actuator range developed for controlled modulating airflow applications in commercial HVAC systems. It combines proportional control capability with integrated auxiliary switches, allowing precise position signaling and system interlocking. The actuator incorporates electronic overload protection and a robust spring return mechanism that ensures rapid movement to a defined safety position during power loss. Designed for flexible installation, it supports adjustable rotation limits and reversible fail-safe direction to suit various damper configurations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e90 in-lb (10 Nm) Torque Output: Provides reliable mechanical force for accurate positioning of medium-sized HVAC dampers under varying load conditions.\u003c\/li\u003e\n\u003cli\u003eSpring Return Fail-Safe Function: Automatically drives the damper to a predetermined safety position when control power is interrupted.\u003c\/li\u003e\n\u003cli\u003eModulating Control Input: Accepts 2–10 V control signals, with optional 4–20 mA operation, enabling smooth proportional airflow regulation.\u003c\/li\u003e\n\u003cli\u003eDual SPDT Auxiliary Switches: Two independently adjustable switches support precise position indication, interlocking, or safety monitoring functions.\u003c\/li\u003e\n\u003cli\u003ePosition Feedback Output: Supplies a 2–10 V feedback signal for real-time verification of damper position within the control system.\u003c\/li\u003e\n\u003cli\u003eAdjustable Mechanical End Stops: Allow the rotation range to be set between 35° and 95° to match specific application requirements.\u003c\/li\u003e\n\u003cli\u003eManual Override Capability: Includes a hex crank for manual positioning during commissioning, testing, or maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe NFB24-SR-S delivers the reliability and precision required for modulating spring return damper control in commercial HVAC airflow management and safety-critical applications.\u003c\/p\u003e","brand":"Belimo","offers":[{"title":"Default Title","offer_id":51051056791850,"sku":"NFB24-SR-S","price":638.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/NFB24-SR-S-product_retina.jpg?v=1768309281","url":"https:\/\/iqelectro.com\/products\/belimo-nfb24-sr-s-damper-actuator-unit-quick-delivery","provider":"IQElectro","version":"1.0","type":"link"}