Valves series "EK" are produced in the 3/2, 5/2 and 5/3 pneumatic functions; the kind of construction is based on a balanced spool. In the mechanically actuated version these valves are available only for the size G1/8" and G1/4", while the manually actuated versions are available in the different sizes and they are suitable for panel mounting (except for size G1/2").