The Haldex 1/2" Inlet Port Air Brake Quick Release Valve is designed to provide reliable and efficient performance in the most demanding conditions. This valve is highly resistant to corrosion and harsh weather and is constructed with an oil resistant diaphragm and disk to offer long-lasting service. It has been stringently evaluated to ensure reliability performance and high efficiency. This valve comes with optional noise reducing foam crossers or silencers and consists of one exhaust port, two delivery ports and one supply port. It is ideal for use in air brake systems and is sure to provide reliable and efficient performance. FleetPride is your First Click in Heavy Duty®.