{"product_id":"spirtovent-vdn400fl-4-combination-air-dirt-separator-w-drain-removable-head-flanged","title":"Spirtovent VDN400FL 4\" Combination Air \u0026 Dirt Separator w\/ Drain Removable Head -  Flanged","description":"\u003cp\u003e\u003cspan\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/Spirovent_Senior_Comingation_Air-Dirt_Eliminator.pdf?v=1788404068\" target=\"_blank\"\u003e\u003cspan\u003eBROCHURE\u003c\/span\u003e\u003c\/a\u003e\u003cbr\u003e\u003cbr\u003eSpirtovent VDN400FL 4\" Combination Air \u0026amp; Dirt Separator w\/ Drain Removable Head -  Flanged\u003cbr\u003e\u003c\/span\u003eStandard Velocity \/ Steel \u003c\/p\u003e\u003cp\u003e\u003cspan\u003eIncludes a removable head and tube sheet construction. This allows access to the Spirotube bundle for inspection or cleaning. \u003cbr\u003e\u003cbr\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eADVANTAGES TO THE SPECIFIER, INSTALLER AND OWNER \u003c\/strong\u003e\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e No bypass, isolating valves or replacement fi lters to clog and reduce flow \u003cbr\u003e Dirt can be flushed while the system is in full operation. \u003cbr\u003e Quiet operation \u003cbr\u003e Minimum pressure drop; always constant \u003cbr\u003e Increased component life \u003cbr\u003e Reduced oxygen-based corrosion and pump cavitation \u003cbr\u003e Provides optimum heat transfer \u003cbr\u003e\u003c\/span\u003e Optional removable head for bundle inspection\u003cspan\u003e\u003cbr\u003e\u003c\/span\u003e\u003c\/p\u003e\u003col\u003e\n\u003cli\u003eThe automatic air vent is guaranteed not to leak and can only be closed by the installer for a pressure test.\u003c\/li\u003e\n\u003cli\u003eLifting eyes make installation easy.\u003c\/li\u003e\n\u003cli\u003eThe air chamber has been designed so that dirt cannot reach the valve.\u003c\/li\u003e\n\u003cli\u003eWelded steel construction guarantees long life.\u003c\/li\u003e\n\u003cli\u003eValve for releasing large amounts of air during filling and for skimming of floating dirt.\u003c\/li\u003e\n\u003cli\u003eThe unique Spirotube is the core of the Spirovent. Designed to trap the smallest microbubble and microscopic dirt particle, yet it offers little resistance to flow.\u003c\/li\u003e\n\u003cli\u003eThreaded or flanged connections available.Threaded 2”-4” (not available on units with removable head) ; Flanged 2” and up. Large capacity collection chamber reduces the need for frequent draining.\u003c\/li\u003e\n\u003cli\u003eDrain valve for flushing out the dirt.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Spirotherm","offers":[{"title":"Default Title","offer_id":47344986620077,"sku":"VDN 400 FL","price":980099.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/SpiroventVDNFL.jpg?v=1787908983","url":"https:\/\/www.bostonheatingsupply.com\/products\/spirtovent-vdn400fl-4-combination-air-dirt-separator-w-drain-removable-head-flanged","provider":"Boston Heating Supply","version":"1.0","type":"link"}