{"product_id":"eclipse-501221-valve","title":"Eclipse 501221 Valve","description":"\u003cp\u003eThe \u003cstrong\u003eEclipse 501221 Valve\u003c\/strong\u003e is a high-performance \u003cstrong\u003e3-inch NPT manual butterfly valve\u003c\/strong\u003e engineered specifically for air and gas flow control within industrial combustion systems. As a \u003cstrong\u003efull port butterfly valve\u003c\/strong\u003e, the 112BV-B model features a beveled disc design with a 75-degree rotation, ensuring a high flow coefficient (Cv) of 457 to minimize pressure drop across the line. Constructed with a \u003cstrong\u003epowder-coated cast iron body\u003c\/strong\u003e and a \u003cstrong\u003ecarbon steel disc\u003c\/strong\u003e, this valve is built for durability in demanding HVACR and process heating environments. The \u003cstrong\u003ezinc-plated steel shaft\u003c\/strong\u003e and \u003cstrong\u003eBuna-N shaft packing seal\u003c\/strong\u003e provide reliable operation and resistance to common industrial media. Technicians should note that while these valves excel at precision throttling and flow regulation, they are not intended for use as tight shut-off valves. This manual control unit integrates seamlessly into systems requiring consistent \u003cstrong\u003ecombustion air regulation\u003c\/strong\u003e or gas manifold pressure management, offering a rugged, field-proven solution for contractors focused on system efficiency and long-term performance.\u003c\/p\u003e\n\n\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Port Design:\u003c\/strong\u003e Maximizes flow capacity and reduces turbulence, achieving a Cv of 457 for optimal system efficiency.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRugged Construction:\u003c\/strong\u003e Features a durable cast iron body and carbon steel disc designed to withstand industrial combustion environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecise Flow Control:\u003c\/strong\u003e The beveled disc and 75-degree rotation allow for granular manual adjustment of air and gas ratios.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReliable Sealing:\u003c\/strong\u003e Equipped with a Buna-N shaft packing seal to prevent external leakage during high-frequency operation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEase of Integration:\u003c\/strong\u003e Standard 3\" NPT threaded connections ensure straightforward installation in existing gas or air piping runs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cstrong\u003eCommon Questions\u003c\/strong\u003e\n\u003cp\u003e\u003cstrong\u003eCan the Eclipse 501221 be used for bubble-tight shut-off?\u003c\/strong\u003e\u003cbr\u003e\nNo, this butterfly valve is designed specifically for flow control and regulation in combustion systems. It should not be used in applications where a 100% leak-proof shut-off is required.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat media is compatible with the 112BV-B model?\u003c\/strong\u003e\u003cbr\u003e\nThis valve is optimized for air and clean fuel gases common in industrial burners and HVACR combustion manifolds.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes this valve support automatic actuation?\u003c\/strong\u003e\u003cbr\u003e\nThe 501221 is a manual control model. For automated requirements, a compatible automatic version or an optional crank arm assembly would be necessary for actuator integration.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Eclipse","offers":[{"title":"Default Title","offer_id":44249772654770,"sku":"501221","price":418.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Pic_f77c8e93-a756-4776-9bf7-ec7a25f3e529.png?v=1715291773","url":"https:\/\/www.gsistore.com\/products\/eclipse-501221-valve","provider":"GSIstore","version":"1.0","type":"link"}