{"product_id":"mueller-industries-a17942-check-valve","title":"Mueller Industries A17942 Check Valve","description":"\u003cp\u003eThe \u003cspan\u003e\u003cstrong\u003eMueller Industries\u003c\/strong\u003e \u003c\/span\u003e\u003cstrong\u003eA17942 Magnetic Check Valve\u003c\/strong\u003e is a professional-grade solution for preventing reverse flow in high-capacity commercial refrigeration and air conditioning systems. Engineered with a \u003cstrong\u003e1-5\/8\" ODS solder connection\u003c\/strong\u003e, this \u003cstrong\u003eCHECKMASTER series valve\u003c\/strong\u003e utilizes a hermetically formed solid copper body to eliminate potential leak paths. Unlike standard spring-loaded valves, the \u003cstrong\u003eA17942\u003c\/strong\u003e uses \u003cstrong\u003emagnetic technology\u003c\/strong\u003e to provide a near-zero leak rate and superior pulsation dampening. It features a built-in \u003cstrong\u003e30-mesh stainless steel screen\u003c\/strong\u003e to protect internal components from debris, ensuring long-term reliability in the field. With a \u003cstrong\u003eMaximum Working Pressure (MWP) of 800 psi\u003c\/strong\u003e and an operating temperature range of \u003cstrong\u003e-40°F to 300°F\u003c\/strong\u003e, this valve is fully \u003cstrong\u003ecompatible with HFC, HCFC, and CFC refrigerants\u003c\/strong\u003e, including high-pressure R-410A. The \u003cstrong\u003eDuraForm technology\u003c\/strong\u003e used in its construction allows for high-temperature brazing without damaging internal seats, offering maximum durability for demanding HVACR applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic Closure System:\u003c\/strong\u003e Provides a more reliable seal than traditional springs, reducing pressure drop while maintaining a \u003cstrong\u003epositive isolation\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Flow Design:\u003c\/strong\u003e Boasts a \u003cstrong\u003eCv value of 27.8\u003c\/strong\u003e, minimizing energy loss and maximizing system efficiency in large-scale suction or liquid lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDuraForm Construction:\u003c\/strong\u003e Eliminates internal braze materials, allowing the valve to withstand installation heat and maintain \u003cstrong\u003ehermetic integrity\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Mounting:\u003c\/strong\u003e Designed for flexible installation in either \u003cstrong\u003evertical or horizontal positions\u003c\/strong\u003e without compromising performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Protection:\u003c\/strong\u003e Integrated \u003cstrong\u003estainless steel strainer\u003c\/strong\u003e prevents contaminants from fouling the seat, reducing emergency service calls.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Questions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the minimum pressure required to open this valve?\u003c\/strong\u003e\u003cbr\u003eThe \u003cspan\u003e\u003cstrong\u003eMueller Industries \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003eA17942\u003c\/strong\u003e is designed for low-pressure differential operation, typically requiring \u003cstrong\u003eless than 1 psi\u003c\/strong\u003e to initiate flow, making it ideal for systems where head pressure must be conserved.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this valve be used with R-410A systems?\u003c\/strong\u003e\u003cbr\u003eYes, its \u003cstrong\u003e800 psi pressure rating\u003c\/strong\u003e and \u003cstrong\u003eUL recognition\u003c\/strong\u003e make it suitable for high-pressure \u003cstrong\u003eR410A applications\u003c\/strong\u003e and modern HFO blends.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need to disassemble the valve before brazing?\u003c\/strong\u003e\u003cbr\u003eWhile \u003cstrong\u003eDuraForm technology\u003c\/strong\u003e provides high heat resistance, it is standard practice for HVAC technicians to wet-wrap the body and use a nitrogen purge to protect the \u003cstrong\u003eEPDM seats\u003c\/strong\u003e and internal alignment during the soldering process.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong style=\"color: red;\"\u003eThis item is not eligible for free shipping.\u003c\/strong\u003e\u003c\/p\u003e\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":"Mueller Industries","offers":[{"title":"Default Title","offer_id":1671379517465,"sku":"A17942","price":1038.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_69c3f3a3-1883-4293-a23b-c21f6b95098e.png?v=1792452651","url":"https:\/\/www.gsistore.com\/en-ca\/products\/mueller-industries-a17942-check-valve","provider":"GSIstore","version":"1.0","type":"link"}