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PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer in Saudi Arabia PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer in Saudi Arabia PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer in Saudi Arabia PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer in Saudi Arabia PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer in Saudi Arabia PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer in Saudi Arabia

PR-4 Air Brake Pressure Valve - 70 PSI Protection Valve Replaces 288323, 641137, 503511C - Compatible with Bendix, Mack, Navistar, Volvo VNL - for Heavy Duty Truck & Trailer

SAR 157
Brand
Lnkvorx
– 1 +

Special Features

  • Universal Fleet Compatibility - Engineered as a professional-grade direct replacement for the 288323 PR-4 pressure protection valve. This unit is compatible with a wide range of heavy-duty vehicles, including Volvo VNL, Mack, Navistar, and Freightliner. It seamlessly replaces OE part numbers 288323, 288323N, 641137, 503511C, and R955288323, ensuring a precise fit for your air system.
  • Precision 70 PSI Calibration - Optimized for safety and response, this air brake pressure valve features a 70 PSI nominal closing pressure. It ensures that your accessory air lines only receive pressure once the primary system is safely charged, and instantly cuts off supply if pressure drops below the safety threshold, preventing a total loss of air.
  • Critical System Protection - This truck air valve is designed to isolate auxiliary air-consuming accessories (such as air horns, seats, and landing gear) from the service brake system. In the event of an accessory line leak, the valve automatically closes to maintain sufficient air pressure for your vehicle's primary braking functions.
  • Rugged Heavy-Duty Construction - Built to withstand the harsh conditions of long-haul trucking. Constructed from high-quality, corrosion-resistant materials, this valve is designed to resist road salt, moisture, and extreme temperature fluctuations. The 1/4" NPT Supply and Delivery ports provide a secure, leak-free connection for consistent performance.
  • Versatile Auxiliary Application - Beyond primary trailers, this PR-4 type valve is the ideal solution for protecting a variety of air-powered systems, including trailer stabilizer stands, beacon lights, and alarms. Its compact and lightweight design allows for an easy "plug-and-play" installation in tight spaces without requiring complex modifications.

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