{"product_id":"mueller-industries-ai15504-relief-valve","title":"Mueller Industries AI15504 Relief Valve","description":"\u003cp\u003eThe \u003cspan\u003e\u003cstrong\u003eMueller Industries\u003c\/strong\u003e \u003c\/span\u003e\u003cstrong\u003eAI15504 Relief Valve\u003c\/strong\u003e is a veteran-grade \u003cstrong\u003eSafetyMaster pressure relief valve\u003c\/strong\u003e designed for mission-critical overpressure protection in commercial refrigeration and HVAC systems. Engineered for high-side application on liquid receivers, this straight-through \u003cstrong\u003e425 PSI PRV\u003c\/strong\u003e features a 1\/2-inch \u003cstrong\u003eNPTFE inlet\u003c\/strong\u003e and a 5\/8-inch \u003cstrong\u003eflare outlet\u003c\/strong\u003e connection. The brass body construction, paired with a stainless steel spring and a resilient neoprene seat disc, ensures consistent \u003cstrong\u003eHVAC system pressure protection\u003c\/strong\u003e across a wide temperature range of -40°F to 300°F.\u003c\/p\u003e\n\u003cp\u003eThis \u003cstrong\u003erefrigerant relief valve\u003c\/strong\u003e is fully compatible with all common fluorinated refrigerants (CFC, HCFC, and HFC) and their associated oils. Each unit is individually hand-calibrated and tested, featuring discharge rates certified by the National Board of Boiler and Pressure Vessel Inspectors. For contractors, the \u003cspan\u003e\u003cstrong\u003eMueller Industries \u003c\/strong\u003e\u003c\/span\u003e\u003cstrong\u003eAI15504\u003c\/strong\u003e offers a reliable, leak-proof solution that meets ASHRAE Standard 15 and ASME code requirements for unfired pressure vessels, ensuring your installs remain compliant and secure under high-demand \u003cstrong\u003erefrigeration pressure safety\u003c\/strong\u003e conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBroad Compatibility:\u003c\/strong\u003e Rated for use with a wide range of refrigerants, including R-22, R-134a, R-404A, and R-410A.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecise Calibration:\u003c\/strong\u003e Factory-set at \u003cstrong\u003e425 PSI\u003c\/strong\u003e to prevent equipment damage and ensure personnel safety.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Infrastructure:\u003c\/strong\u003e Heavy-duty brass body and corrosion-resistant stainless steel components withstand harsh industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertified Performance:\u003c\/strong\u003e Discharge capacities are National Board certified, satisfying stringent \u003cstrong\u003eASHRAE Standard 15\u003c\/strong\u003e safety codes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact Profile:\u003c\/strong\u003e The straight-through design allows for easy integration into tight mechanical spaces on refrigerant vessels.\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 flow capacity of the AI15504?\u003c\/strong\u003e\u003cbr\u003eThe valve is rated for a flow capacity of approximately 35.6 lb\/min of air, providing rapid pressure discharge during an overpressure event.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this valve be mounted below the liquid level?\u003c\/strong\u003e\u003cbr\u003eNo, these \u003cstrong\u003e425 PSI relief valves\u003c\/strong\u003e are specifically designed for use on liquid receivers above the liquid refrigerant level to ensure proper gas discharge.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the outlet connection NPT or Flare?\u003c\/strong\u003e\u003cbr\u003eThis specific model features a 5\/8-inch female flare outlet, requiring a compatible flare fitting for the discharge line, while the 1\/2-inch inlet uses NPTFE threading.\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":1671451672601,"sku":"AI15504","price":121.06,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_3b1ea70b-ce2f-41d7-927a-312c62190a72.png?v=1792451432","url":"https:\/\/www.gsistore.com\/products\/mueller-industries-ai15504-relief-valve","provider":"GSIstore","version":"1.0","type":"link"}