{"product_id":"a4021a1010-honeywell-valve-proving-system-25-second-test-time-100-120-vac","title":"A4021A1010 | Honeywell Valve Proving System 25-Second Test Time, 100–120 VAC","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"444\" data-start=\"90\"\u003eThe Honeywell A4021A1010 is a valve proving system designed to verify the tightness of safety shutoff valves in gas-fired burner systems. Operating at 100–120 VAC and consuming 4.5 VA, it performs a 25-second leak test per valve to ensure reliable system safety before each burner start-up.\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: 99.964%; height: 588px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eFlame Safety Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eA4021A1010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eValve Proving Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eAutomatic leak test for safety shutoff valves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eTest Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003e25 seconds per valve\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003e100–120 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 39.2px;\"\u003e\u003cstrong\u003ePower Consumption\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 39.2px;\"\u003e4.5 VA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003e50 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eElectronic valve proving controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003ePanel or control cabinet mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 39.2px;\"\u003e\u003cstrong\u003eValve Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 39.2px;\"\u003eGas safety shutoff valves (two-valve systems)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eGas-fired burners and combustion systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 39.2px;\"\u003e\u003cstrong\u003eOperation Sequence\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 39.2px;\"\u003eTests both upstream and downstream valves for leakage before ignition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eSafety Standard\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eMeets EN and UL gas safety system requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eIndicator\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eLED display for test status and fault indication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eReset\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eAutomatic or manual reset options depending on system design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 39.2px;\"\u003e\u003cstrong\u003eEnvironmental Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 39.2px;\"\u003eIndoor use, NEMA 1 equivalent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 39.2px;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 39.2px;\"\u003e0°C to +60°C (32°F to 140°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.2px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 39.2px;\"\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 39.2px;\"\u003e-40°C to +85°C (-40°F to 185°F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eRelative Humidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eUp to 85%, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eTypical Use\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003eIndustrial burners, boilers, and gas heating systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.6px;\"\u003e\n\u003ctd style=\"width: 23.799%; height: 19.6px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 75.8862%; height: 19.6px;\"\u003e0.44 lbs (approx. 0.2 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\"\u003eA4021A1010\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe Honeywell A4021A1010 is part of Honeywell’s proven line of safety components designed for combustion system integrity verification. It ensures that gas valves in burner systems are properly sealed before ignition, preventing dangerous gas leaks and enhancing overall system safety. The unit performs an automatic pressure decay test over a 25-second cycle for each valve, confirming tightness through a pressure differential method. Designed for use with gas-fired systems, the A4021A1010 is compatible with dual-valve arrangements commonly found in industrial and commercial burners. It operates on a standard 100–120 VAC power supply and integrates easily with existing Honeywell burner management systems. Its durable construction and precision electronic control make it a reliable safety component in demanding environments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAutomatic Valve Leak Test: Performs a 25-second proving cycle per valve to confirm gas valve integrity before burner start-up.\u003c\/li\u003e\n\u003cli\u003eSafety Assurance: Prevents unsafe ignition conditions by detecting valve leakage and interrupting burner operation if a fault is found.\u003c\/li\u003e\n\u003cli\u003eSimple Integration: Designed for compatibility with Honeywell burner management systems and standard two-valve configurations.\u003c\/li\u003e\n\u003cli\u003eEfficient Operation: Operates on 100–120 VAC, consuming only 4.5 VA, providing energy-efficient safety testing.\u003c\/li\u003e\n\u003cli\u003eReliable Electronic Control: Solid-state design ensures stable performance and accurate pressure verification.\u003c\/li\u003e\n\u003cli\u003eStatus Indication: Equipped with LED indicators to display test status and fault conditions for quick diagnostics.\u003c\/li\u003e\n\u003cli\u003eCompact and Durable: Lightweight and panel-mountable design fits easily into control enclosures.\u003c\/li\u003e\n\u003cli\u003eEnvironmental Resilience: Rated for operation in ambient temperatures up to +60°C, ideal for industrial burner installations.\u003c\/li\u003e\n\u003cli\u003eInternational Compliance: Meets applicable EN and UL safety standards for gas valve proving systems.\u003c\/li\u003e\n\u003cli\u003eLow Maintenance: Electronic components require minimal servicing while providing long operational life.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe A4021A1010 delivers the reliability and precision required for safe, automatic verification of gas valve integrity in industrial and commercial combustion systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49105097752832,"sku":"A4021A1010","price":3447.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/s-l1200_5db75f76-3522-4f27-97ec-ed883b8c5763.jpg?v=1785540131","url":"https:\/\/alotechparts.com\/products\/a4021a1010-honeywell-valve-proving-system-25-second-test-time-100-120-vac","provider":"Alo Tech Solutions","version":"1.0","type":"link"}