{"product_id":"l408b-1131-honeywell-vaporstat-controller-0-160-oz-low-pressure-steam-control","title":"L408B-1131 | Honeywell Vaporstat Controller 0–160 oz Low-Pressure Steam Control","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"19\" data-end=\"322\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe Honeywell L408B-1131 is a Vaporstat controller designed for accurate low-pressure regulation in steam heating systems. With an adjustable range of 0–16 oz\/in² (0–160 ounces), it provides precise pressure control to protect boilers and optimize system efficiency. This controller is commonly used in residential and light commercial steam applications requiring sensitive pressure management.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-start=\"20\" data-end=\"417\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"20\" data-end=\"417\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable height=\"436\" style=\"width: 95.8333%; height: 313.501px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; 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: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eHVAC Controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eL408B-1131\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003ePressure Controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eVaporstat Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003ePressure Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003e0–160 oz\/in² (0–10 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eLow-Pressure Steam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eSensing Element\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eDiaphragm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eSteam Boiler Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eSurface \/ Panel Mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eSwitching Action\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003ePressure-Activated Mechanical Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eEnclosure Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003eIndustrial Control Housing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003e50\/60 Hz (Typical Boiler Control Circuits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 41.5877%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 58.1846%; height: 19.5938px;\"\u003e2.00 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About\u003cmeta charset=\"utf-8\"\u003e L408B-1131\u003c\/h4\u003e\n\u003cp data-start=\"388\" data-end=\"849\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe L408B-1131 is part of Honeywell’s L408 Series Vaporstat controls, engineered specifically for low-pressure steam systems where conventional pressuretrol devices lack sufficient sensitivity. It features an adjustable pressure setpoint within the 0–160 ounce range and incorporates a diaphragm-operated sensing mechanism for responsive control. The unit is typically panel or surface mounted and integrates directly into boiler control circuits for burner cycling based on steam pressure. Its robust enclosure and mechanical switching design ensure dependable operation in heating and HVAC control environments.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-end=\"828\" data-start=\"372\"\u003e\u003cstrong data-start=\"1085\" data-end=\"1102\"\u003eKey Features:\u003c\/strong\u003e\u003cstrong data-start=\"1085\" data-end=\"1102\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eLow-Pressure Range (0–160 oz\/in²): Provides fine control for steam systems operating at very low pressures.\u003c\/li\u003e\n\u003cli\u003eAdjustable Setpoint: Allows precise calibration to meet specific boiler requirements.\u003c\/li\u003e\n\u003cli\u003eDiaphragm Pressure Sensing: Ensures accurate and responsive switching action.\u003c\/li\u003e\n\u003cli\u003eBoiler Control Integration: Designed for direct connection into steam burner control circuits.\u003c\/li\u003e\n\u003cli\u003eMechanical Switching Mechanism: Delivers consistent and repeatable performance.\u003c\/li\u003e\n\u003cli\u003eDurable Enclosure Construction: Suitable for HVAC and boiler room environments.\u003c\/li\u003e\n\u003cli\u003eSteam System Optimization: Helps maintain efficiency and prevents excessive pressure buildup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe L408B-1131 delivers the reliability and precision required for low-pressure steam boiler control applications.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":51177494970666,"sku":"L408B-1131","price":417.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l500_540a67c0-b095-452c-ba10-4b25a6c53db8.webp?v=1771924812","url":"https:\/\/iqelectro.com\/products\/l408b-1131-honeywell-vaporstat-controller-0-160-oz-low-pressure-steam-control","provider":"IQElectro","version":"1.0","type":"link"}