ASCO Series 327 solenoid valve with explosion proof operators NF or WSNF type for use in potentially explosive atmospheres. Compliance with the Essential Health and Safety Requirements has been assured by compliance with the International and European Standards EN-IEC 60079-0, EN-IEC 60079-1 and EN-IEC 60079-31. The solenoid valves are recommended for pilot applications with high ow, wide pressure ranges and no minimum operating pressure.