{"product_id":"hoffman-401470-model-71a-non-vacuum-air-valve","title":"Hoffman 401470 Model 71A Non-Vacuum Air Valve","description":"\u003cp\u003eReliable air venting is essential for maintaining consistent heat distribution in one-pipe steam heating systems, a function expertly handled by the \u003cstrong\u003e401470\u003c\/strong\u003e Hoffman \u003cstrong\u003eModel 71A\u003c\/strong\u003e. This non-vacuum air valve is engineered to automatically release air from steam radiators and piping, ensuring that steam can circulate freely and effectively to maximize comfort throughout your building.\u003c\/p\u003e\u003cp\u003eThe valve operates using a precision-calibrated thermal element that remains open while cold, allowing air to escape, and seals tightly as soon as steam reaches the valve. This robust design prevents premature steam closure and protects against water hammer by facilitating smooth, efficient system air removal during every heating cycle.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Venting:\u003c\/strong\u003e Efficiently exhausts air from steam systems to prevent cold spots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliable Closure:\u003c\/strong\u003e Precision thermal mechanism seals immediately upon steam contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Engineered to withstand the rigors of frequent heating cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSystem Compatibility:\u003c\/strong\u003e Designed specifically for non-vacuum, one-pipe steam applications.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for residential and light commercial one-pipe steam heating systems requiring efficient radiator venting and reliable air discharge to maintain system pressure balance.\u003c\/p\u003e","brand":"Hoffman","offers":[{"title":"Default Title","offer_id":43128762368094,"sku":"401470","price":106.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/401470_image_359c0d1f-bb05-4ef8-b724-5676bec18599.png?v=1786069644","url":"https:\/\/nationalboilersupply.com\/products\/hoffman-401470-model-71a-non-vacuum-air-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}