The "EF" series solenoid valves are balanced spool distributors with bidirectional internal sealing gaskets placed on the spool itself, and the body is machined internally with great precision. The range includes sizes of 18 – 22 – 27 - 34 mm with connections from G1/8, G1/4, G3/8, and G1/2 in 3/2 – 5/2 – 5/3 functions. The manual operation useful for setting up the system can be activated in two ways: the first (push function) involves operating the valve only by holding down the button, the second (0-1 function) allows the valve to remain activated in the desired function. It is possible to remove the protruding part of the button using a simple screwdriver, by rotating the button over 90° to separate the protruding part from the internal part. The solenoid valves can be mounted individually or in a manifold on special bases, allowing for the rationalization of air distribution in the system.