Product Details: The Bendix R-7 Series Spring Brake Valve is designed to prevent the compounding of service and spring forces, quickly releasing the air pressure that has built up in the actuator's spring cavity. This valve is constructed to reduce hold-off pressure on the spring brakes, making it ideal for cars with multi circuit air brake systems. The valve is made from durable materials. This valve is a great choice for anyone looking for a reliable and efficient spring brake valve. FleetPride is your First Click in Heavy Duty®.