{"product_id":"hoffman-401429-model-74-steam-unit-heater-air-valve","title":"Hoffman 401429 Model 74 Steam Unit Heater Air Valve","description":"\u003cp\u003eMaintain optimal steam unit heater efficiency with the \u003cstrong\u003eHoffman 401429\u003c\/strong\u003e, specifically designed as the high-capacity \u003cstrong\u003eModel 74\u003c\/strong\u003e steam air valve. This essential component ensures reliable venting of non-condensable gases from steam systems to prevent air binding and ensure consistent heating output.\u003c\/p\u003e\u003cp\u003eThe valve operates through a thermostatic mechanism that automatically allows air to escape the system while sealing tightly upon contact with steam. This precise response cycle is engineered to provide long-term reliability and minimize energy waste within industrial and commercial steam heating configurations.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Venting:\u003c\/strong\u003e Rapidly purges air from steam unit heaters to maintain peak thermal performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Seal:\u003c\/strong\u003e Features a sensitive thermal element that prevents steam loss by closing instantly upon temperature rise.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Construction:\u003c\/strong\u003e Built to withstand the harsh internal pressures and temperatures associated with steam service.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for steam unit heaters, large radiators, and steam mains where efficient, automatic air removal is critical for system health.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128728059998,"sku":"401429","price":198.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401429_image_12f442ae-5992-459d-910f-b3470089ccab.png?v=1786069139","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401429-model-74-steam-unit-heater-air-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}