ASCO Namur Pneumatic Valve ASCO SPOOL VALVES ASCO pilot operated or air operated, spool type single/dual solenoid or air aluminium body, “NAMUR” style, 1/4 - 1/2 The solenoid operated spool valves have threaded port connections and NAMUR interface • The same spool valve can be adapted for 3/2 NC or 5/2 functions for controlling double-acting and single-acting actuators • All the exhaust ports of the spool valve are connectable, providing better environmental protection.Particularly recommended for sensitive areas, such as clean rooms, and applications in the pharmaceutical and food processing sectors • The valves offer environmental protection against the ingress of liquids, dusts or other foreign matter (environmentally-protected construction) • The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version) have TÜV (551 series) and EXIDA (551-553 series) certified with integrity levels: SIL 2 for HFT = 0 / SIL 3 for HFT = 1 • The solenoid valves satisfy all relevant EU directives ASCO Series 551 ASCO Series 552 ASCO Series 553 ASCO 3/2, 5/2, 5/3 Pilot Air Operated NAMUR Spool Valves G1/4-G1/2 ASCO SCG551A001 ASCO SCG553A001 ASCO SCG551A002 ASCO SCG553A002 ASCO SCG551A065 ASCO SCG553A065 ASCO SCG551A066 ASCO SCG553A066 ASCO SCG551A001SL ASCO SCG553A001SL ASCO SC G 551 A 001 ASCO SC G 551 A 001 ASCO SC G 553 A 002 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.