Update your semi truck with enhanced control of its pneumatic accessories, with the Bendix TR-3 Series 40 psi Inversion Valve that ensures you're Ready for the Road Ahead™. Thanks to its sophisticated design, this replacement valve is able to regulate the flow of compressed air, switching the direction of the flow between two ports as needed. Fashioned with a durable body to be suitable for a wide range of operating temperatures. FleetPride is your First Click in Heavy Duty®.