The rage of valves is also divided into two categories, normalized valves and not normalized.The valves complying with the norms are according to ISO 5599/1 and Namur.The wide range of valves not complying with any norms includes: electrically actuated valves, pneumatic actuated, manual actuated, mechanical actuated and a series of auxiliary valves and accessories for the control of air. All valves are produced in aluminium alloy in order to create best resistance and stability.