Bendix Brakes 803115 R-12 Air Brake Relay Valve

The Bendix 803115 R-12 Air Brake Relay Valve is a critical component designed to maintain the performance, reliability, and safety of commercial vehicle air brake systems. This relay valve functions as a relay station that speeds up the application and release of air brakes on medium- and heavy-duty trucks, tractors, trailers, and buses.

Key Features:

• 5.5 PSI crack pressure for precise brake control
• Delivers within 1 PSI of control pressure to controlled device in standard configuration
• Body configuration: 1 supply port / 8 delivery ports (6 horizontal + 2 vertical)
• Supply port: 1/2-14 NPT for high-flow air supply
• Control/secondary service port: 1/4-18 NPT
• Four delivery ports (1/2-14 NPT) with four additional ports cored closed for flexible configuration
• Dust shield exhaust port for protection against contaminants
• Operating temperature range: -40°F to 200°F (-40°C to 93°C)
• Includes universal mounting bracket with 0.96-inch x 0.40-inch slots (loose in box)
• Parts interchangeable with R-14 valve for ease of servicing
• Inlet/exhaust valve can be replaced without line removal

This valve is designed for either reservoir or frame mounting and is used to control front axle brake chambers. The Bendix 803115 can replace certain relay valve axle modules that are no longer available, making it an excellent service replacement option. Engineered to meet all federal safety regulations and built to reflect the highest engineering standards, this relay valve is manufactured by Bendix Commercial Vehicle Systems, part of the Knorr-Bremse Group.

Cross References: 300205, 300205N, 801929, 170803115, 745-803115, BW 803115

Repair Kit: 5019003

VMRS Code: 13-010-009