{"product_id":"hoffman-401446-model-62-vacuum-breaker","title":"Hoffman 401446 Model 62 Vacuum Breaker","description":"\u003cp\u003eProtect your steam and hydronic heating systems from the damaging effects of vacuum conditions with the \u003cstrong\u003e401446 Hoffman Model 62 Vacuum Breaker\u003c\/strong\u003e. This precision-engineered valve is designed to automatically admit atmospheric pressure into the system whenever a vacuum occurs, effectively preventing potential collapse or siphoning of equipment. Relying on the trusted quality of \u003cstrong\u003eHoffman\u003c\/strong\u003e, this unit ensures seamless integration and long-term durability for demanding commercial and industrial environments.\u003c\/p\u003e\u003cp\u003eThe mechanism operates through an internal disc that remains tightly seated during normal positive pressure operation. Once the internal pressure drops below atmospheric levels, the valve immediately unseats, allowing air to enter the vessel and equalize the pressure. This simple yet critical process safeguards coils, heat exchangers, and tanks from the structural stresses associated with uncontrolled vacuum formation.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Pressure Equalization:\u003c\/strong\u003e Immediate response to vacuum formation to protect piping and system integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRobust Construction:\u003c\/strong\u003e Engineered to withstand the rigors of industrial steam and hydronic fluid service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Sealing:\u003c\/strong\u003e Precision disc assembly ensures tight closure during standard system operation.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Used primarily in steam coils, unit heaters, water heaters, and large piping loops to prevent system collapse, air-bound condensate, or fluid siphoning during shutdown cycles.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128745525342,"sku":"401446","price":148.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401446_image_b3e425ae-f324-4122-9131-b4814c50cf14.png?v=1786069389","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401446-model-62-vacuum-breaker","provider":"National Boiler Supply","version":"1.0","type":"link"}