asco scg551a001ms asco scg551a001sl asco scg551a001ms.24/dc scg551a001ms asco joucomatic asco solenoid valve scg551a001ms asco scg551a001 ASCO SCG551A001 - 3/2 OR 5/2 WAY SPOOL VALVE, G1/4, SERIES 551 NAMUR INTERFACE SPOOL VALVES ASCO Joucomatic product SCG551A001. With series 551 all exhaust ports are connectable, providing better environmental protection. This product is particularly recommended for sensitive areas, such as clean rooms and applications in the pharmaceutical and food processing sectors. This series provides environmental protection against the ingress of liquids, dusts or other foreign matter. This valve has threaded port connections and a NAMUR interface. The same spool valve can be adapted for 3/2 NC or 5/2 functions for controlling double / single acting actuators.