{"product_id":"lf24-sr-us-belimo-35-in-lb-spring-return-modulating-damper-actuator-24v","title":"LF24-SR US | Belimo 35 In Lb Spring Return Modulating Damper Actuator 24V","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"130\" data-end=\"415\"\u003eThe Belimo LF24-SR US is a compact spring return damper actuator providing 35 in-lb of torque for precise modulating control. It operates on AC\/DC 24 V and supports fail-safe positioning for reliable airflow control in HVAC systems.\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 450.657px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; 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: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eBelimo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eDamper Actuators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eLF24-SR US\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eSpring Return Actuators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eActuator Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eSpring return, modulating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eNominal Torque\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e35 in-lb (4 Nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eAC\/DC 24 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eNominal Frequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e50\/60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eVoltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; 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: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eControl Signal\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e2…10 V (4…20 mA with resistor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 39.1875px;\"\u003e\u003cstrong\u003ePower Consumption (Running)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 39.1875px;\"\u003e2.5 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 39.1875px;\"\u003e\u003cstrong\u003ePower Consumption (Rest)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 39.1875px;\"\u003e1 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eTransformer Sizing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e5 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eAngle of Rotation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eMax. 95°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eRunning Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e150 s \/ 90°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eFail-Safe Running Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e\u0026lt;25 s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eElectrical Connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e18 GA plenum cable, 3 ft, 1\/2\" NPT conduit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eDegree of Protection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003eIP54 \/ NEMA 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eAmbient Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e-22…122°F (-30…50°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 27.6056%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.0307%; height: 19.5938px;\"\u003e3.4 lb (1.6 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\"\u003eLF24-SR US\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe LF24-SR US is part of Belimo’s compact damper actuator series designed for accurate airflow modulation and dependable fail-safe operation. It delivers 35 in-lb of torque and features a spring return mechanism that drives the damper to a predefined safety position upon power loss. The actuator supports modulating control via a 2…10 V signal and provides position feedback for integration with building automation systems. Its maintenance-free construction and integrated overload protection ensure consistent long-term performance in HVAC installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSpring Return Safety Function: Integrated spring mechanism provides automatic fail-safe positioning during power interruption.\u003c\/li\u003e\n\u003cli\u003ePrecise Modulating Control: Supports 2…10 V control signals with optional 4…20 mA input using an external resistor.\u003c\/li\u003e\n\u003cli\u003eCompact Torque Output: Delivers 35 in-lb of torque suitable for small to medium-sized air control dampers.\u003c\/li\u003e\n\u003cli\u003eSelectable Direction Of Rotation: Motor and fail-safe direction can be configured through mounting orientation and onboard switch.\u003c\/li\u003e\n\u003cli\u003eIntegrated Position Feedback: Provides 2…10 V feedback signal for accurate damper position monitoring.\u003c\/li\u003e\n\u003cli\u003eQuiet Operation: Low motor noise level of 30 dB(A) supports use in noise-sensitive HVAC environments.\u003c\/li\u003e\n\u003cli\u003eDurable And Protected Design: IP54 and NEMA 2 ratings protect internal components from dust and incidental moisture.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe LF24-SR US delivers the reliability and precision required for safe and accurate damper control in commercial HVAC systems.\u003c\/p\u003e","brand":"Belimo","offers":[{"title":"Default Title","offer_id":51041875788074,"sku":"LF24-SR US","price":446.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/LF24-SR_US-product_retina_grande_7c5f3dce-ea08-49cd-ac63-96054c44df43.jpg?v=1768068839","url":"https:\/\/iqelectro.com\/products\/lf24-sr-us-belimo-35-in-lb-spring-return-modulating-damper-actuator-24v","provider":"IQElectro","version":"1.0","type":"link"}