{"product_id":"hoffman-401458-model-43-non-vacuum-air-valve","title":"Hoffman 401458 Model 43 Non-Vacuum Air Valve","description":"\u003cp\u003eEfficiently manage trapped air in your steam heating system with the high-performance Hoffman \u003cstrong\u003eModel 43\u003c\/strong\u003e air valve. This non-vacuum component, identified by part number \u003cstrong\u003e401458\u003c\/strong\u003e, plays a critical role in maintaining system pressure and heat distribution by allowing air to vent freely during the heating cycle while closing securely upon contact with steam.\u003c\/p\u003e\u003cp\u003eThe internal thermostatic element is engineered to respond rapidly to temperature changes. When air is present, the valve remains open to permit venting; as soon as steam reaches the valve, the precision-calibrated bellows expand to seal the port, preventing steam leakage and ensuring your radiators operate at peak efficiency.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Venting:\u003c\/strong\u003e Ensures consistent system operation by purging air effectively.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePositive Sealing:\u003c\/strong\u003e Precision-engineered bellows prevent steam loss during the heating cycle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Built to withstand the demands of residential and commercial steam applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for single-pipe steam heating systems, radiator venting, and residential steam boiler piping configurations where non-vacuum venting is required.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128750473310,"sku":"401458","price":62.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401458_image_7b684244-c684-4161-ba4a-77564486fb99.png?v=1786069469","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401458-model-43-non-vacuum-air-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}