Emergency Relay Valve

The Automann 170.KN30400 Emergency Relay Valve offers a high-quality solution for controlling air brake systems in heavy-duty trucks and trailers. Modeled after the Haldex KN30400, this relay valve is responsible for the rapid application and release of air to the brake chambers, ensuring quick and reliable braking action in emergency situations. It features four 3/8” NPT delivery ports, providing flexibility for various air brake configurations and supporting efficient air flow to all wheels. The valve’s rugged design and premium materials ensure long-lasting durability and resistance to corrosion, making it suitable for harsh operating environments. Its universal fit allows for easy installation in a wide range of commercial vehicles, whether for new builds or as a replacement part. The Automann 170.KN30400 meets or exceeds OEM specifications, ensuring compatibility and performance. Available from Wofford Truck Parts, this emergency relay valve is trusted by technicians and fleet managers for maintaining safe, compliant, and responsive air brake systems.