Materials: Housing and cover: Aluminium or zinc alloy. Seals: Nitrile rubber. Medium: Compressed air, filtered, lubricated or non-lubricated. Mode of operation: Poppet valve. Mounting: In-line. Operating pressure: 0.5 to 10 bar. Operating temperature: 80°C max.. - enables air to be dumped quickly from air reservoirs and cylinders - allows higher cylinder speeds to be achieved.