The Bendix PR-4 Series Air Brake Pressure Protection Valve is designed to provide reliable pressure control and improved safety in air brake systems. This valve is designed to control the pressure in a system, ensuring it stays within safe limits and preventing damage to equipment and reducing downtime. The PR-4 valve can be used in a wide range of applications including air brake systems, air suspension systems, and air ride systems. This valve is designed to provide reliable pressure control and improved safety in air brake systems, ensuring that the system stays within safe limits and preventing damage to equipment and reducing downtime. FleetPride is your First Click in Heavy Duty .