Engineered for High-Pressure Air System Safety: The GTD 223 485V Pressure Protection Valve. This is one genuine GTD 223 485V Pressure Protection Valve (PPV), a critical, high-quality component for the air brake systems of commercial vehicles. Manufactured to GT Development specifications, this valve is designed to be a crucial safeguard, automatically isolating non-essential air accessories (like air horns, seats, or suspension controls) when the system pressure drops to an unsafe level. The 223 485V is precisely set to open at 85 PSI to allow air flow to the auxiliary lines and close firmly at 67 PSI. This action prevents a major leak in an auxiliary system from draining the air brake reservoirs, thereby maintaining compliance with FMVSS 121 and preserving the braking function. This specific model features a 1/2" PTF Male Inlet and two 3/8" NPT Female Outlets. Cross-references of the product: GT Development 223-485V, Freightlner 223485V, Allance GTD 223 485 V, and Velvc 032219. The superior design of GTD 223 485V, featuring a rugged construction and a Viba Seal, ensures reliable performance and enhanced safety by providing a dedicated means of air system integrity. Characteristics: ⦁ Part Type: Air Brake Pressure Protection Valve (PPV) ⦁ Opening Pressure: 85 PSI ⦁ Closing Pressure: 67 PSI ⦁ Inlet Port: 1/2-14 PTF Male ⦁ Outlet Ports: (2) 3/8-18 NPT Female ⦁ Body Material: Zinc Alloy ⦁ Feature: Built-in Viba Seal