ev220b 6-22 is a direct servo-operated 2/2-way solenoid valve program with connections from 1/4" to 1".this program is especially for oem applications demanding a robust solution and moderate flow rates.connections from 1/4" up to 1", working pressure up to 30 bar, medium temperature up to 100 °c, coil enclosures up to ip67, no versions in 3/8" and 1/2" valve sizes.