Parker N series are high flow, poppet-style valves. Because of their high flow, three-way. configurations are ideal to control single-acting cylinders, brakes, and clutches where rapid response is mandatory. These valves are time tested and proven in rugged applications. Valve bodies are cast aluminum and electrical connections are epoxy resin encapsulated to keep moisture out. N series valves are factory prelubricated to run with nonlubricated air, but lubricated air is recommended to maximize seal life. Expect many millions of cycles from this valve.