The "NAMUR" style spool valve comes with threaded port connection and Namur interface, while the "THREADED" style spool valve comes with threaded port connection • All the exhaust ports of this spool valve are connectable, providing better environmental protection, particularly recommended for sensitive areas such as clean rooms as well as applications in the pharmaceutical and food processing sectors • The valve offers environmental protection against the ingress of liquids, dusts or any other foreign matters (environmentally-protected construction