{"product_id":"bell-gossett-113247-3-4-differential-bypass-valve","title":"Bell \u0026 Gossett 113247 3\/4\" Differential Bypass Valve","description":"\u003cp\u003eThis hydronic control component serves as a critical pressure-regulating solution for residential and commercial heating systems. The \u003cstrong\u003eBell \u0026amp; Gossett 113247\u003c\/strong\u003e differential bypass valve, part number \u003cstrong\u003e113247\u003c\/strong\u003e, is designed to automatically maintain minimum system flow rates, preventing pump strain and excessive noise when zone valves or thermostatic radiator valves close.\u003c\/p\u003e\u003cp\u003eBy monitoring the pressure differential across the heating circuit, the valve modulates flow to recirculate water back to the boiler. This mechanism ensures that the circulator operates within its intended curve, protecting equipment longevity while stabilizing heat delivery across multiple zones.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePressure Regulation:\u003c\/strong\u003e Automatically adjusts to bypass excess flow when system resistance increases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydronic Stability:\u003c\/strong\u003e Reduces hydraulic shock and noise caused by rapid closure of zone valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEquipment Protection:\u003c\/strong\u003e Prevents pump dead-heading and overheating during low-load conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnergy Efficiency:\u003c\/strong\u003e Maintains consistent boiler return temperatures for optimized burner performance.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for zoning systems with primary-secondary piping, standard hydronic heating loops, and radiant heating manifolds requiring consistent differential pressure management.\u003c\/p\u003e","brand":"Bell \u0026 Gossett","offers":[{"title":"Default Title","offer_id":43123964575838,"sku":"113247","price":148.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/113247_image_06ae2edd-5598-43fa-9d05-0076ac0574f9.png?v=1786027104","url":"https:\/\/nationalboilersupply.com\/products\/bell-gossett-113247-3-4-differential-bypass-valve","provider":"National Boiler Supply","version":"1.0","type":"link"}