{"product_id":"caleffi-519566a-differential-pressure-bypass-valve-3-4-press-connections-for-hydronic-systems","title":"Caleffi 519566A Differential Pressure Bypass Valve 3\/4\" Press Connections for Hydronic Systems","description":"\u003cp\u003eThe Caleffi 519566A is a 3\/4\" differential pressure bypass valve with 3\/4\" press connections, used to maintain minimum flow and limit differential pressure in hydronic systems with zone valves.\u003c\/p\u003e\u003cp\u003eInstalled between supply and return, the valve opens as zone valves close and system differential pressure rises, bypassing flow to protect the circulator and boiler and to reduce flow noise in the zones that remain open.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore ordering:\u003c\/strong\u003e Confirm the 3\/4\" press connections suit your piping layout and press tool. Set the valve based on the circulator curve and system design; the setting procedure is in the installation manual below.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Caleffi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part #:\u003c\/strong\u003e 519566A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e 519 series differential bypass valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Differential pressure bypass valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 3\/4\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection:\u003c\/strong\u003e 3\/4\" press\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 8016615471205\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Balancing Valves\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDocuments\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/519566A_CALE-519566A_8016615471205_TechB.pdf\" target=\"_blank\" rel=\"noopener\"\u003eTechnical Data Sheet\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/519566A_CALE-519566A_8016615471205_Inst.pdf\" target=\"_blank\" rel=\"noopener\"\u003eInstallation \u0026amp; Operation Manual\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/519566A_CALE-519566A_8016615471205_Sub.pdf\" target=\"_blank\" rel=\"noopener\"\u003eSubmittal Sheet\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/res.cloudinary.com\/dzhpkjoqj\/Caleffi\/519566A_CALE-519566A_8016615471205_Sell.pdf\" target=\"_blank\" rel=\"noopener\"\u003eProduct Brochure\u003c\/a\u003e (PDF)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eSee also: \u003ca href=\"\/collections\/balancing-valves\"\u003ebalancing valves\u003c\/a\u003e, \u003ca href=\"\/collections\/caleffi-north-america\"\u003eall Caleffi products\u003c\/a\u003e.\u003c\/p\u003e","brand":"Caleffi","offers":[{"title":"Default Title","offer_id":50517450915943,"sku":"CALE-519566A","price":172.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0651\/2253\/3479\/files\/519502A_75a27836-b34a-4b47-a95b-6a557378e2e1.jpg?v=1792425130","url":"https:\/\/www.thehousesupplier.com\/products\/caleffi-519566a-differential-pressure-bypass-valve-3-4-press-connections-for-hydronic-systems","provider":"The House Supplier","version":"1.0","type":"link"}