2-Way Normally Open ValvePeter Paul offers a line of large orifice solenoid valves to address process industry requirements for high flow rate or quick dump and fill capacity. These AC or DC powered valves are also suited for low pressure gas and liquid applications. Port sizes for the two way normally open version range from 1/2” to 3” NPT, with pressure ratings from 3 to 200 PSI. • Large orifice sizes for high flow applications. • Body is made of brass forgings. • Operate on differential pressure — Internal Pilot. • NPT threaded connections. • Same coils and housings as our popular 20 Series.