Prepare your semi to be Ready for the Road Ahead™, with the Bendix SR-7™ 1/2"-14 NPT Spring Brake Modulating Valve that enhances control of the spring brakes. By utilizing a specialized design, this replacement control valve monitors the air pressure in a brake mechanism, engaging the spring brakes once pressure is lost. Built with durable materials to withstand the daily demands of commercial vehicles. FleetPride is your First Click in Heavy Duty®.