{"product_id":"hoffman-401455-model-41-non-vacuum-air-valve","title":"Hoffman 401455 Model 41 Non-Vacuum Air Valve","description":"\u003cp\u003eEfficiently vent unwanted air from your steam heating system with the high-performance \u003cstrong\u003eHoffman 401455\u003c\/strong\u003e Model 41 air valve. Designed as a non-vacuum unit, this essential component prevents air binding in radiators and piping, ensuring your system maintains optimal heat distribution and energy efficiency. The \u003cstrong\u003eModel 41\u003c\/strong\u003e is recognized throughout the industry for its consistent reliability and long service life in residential and commercial steam applications.\u003c\/p\u003e\u003cp\u003eThis air valve operates by utilizing a precision-engineered internal float and seat mechanism. As the system heats, the valve allows air to escape through the vent port; once steam reaches the valve, the heat-sensitive element expands to close the port securely, preventing steam loss. This cyclic action ensures that the radiator remains filled with heat-transfer medium rather than air pockets that would otherwise compromise performance.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eRapid Venting:\u003c\/strong\u003e Engineered for quick air evacuation to ensure faster radiator warm-up times.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Shut-off:\u003c\/strong\u003e Features a robust seating mechanism that reliably seals against steam to prevent leakage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built with industrial-grade materials to withstand the temperature and pressure fluctuations typical of steam heating environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for one-pipe steam heating systems, standalone steam radiators, and various low-pressure heating circuits requiring consistent, reliable air removal.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128746639454,"sku":"401455","price":62.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401455_image_efbbe8db-fb80-44f2-b4cb-893e5ec97fd8.png?v=1786069429","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401455-model-41-non-vacuum-air-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}