BephaMart 1/4inch DC 12V 2 Way Normally Closed Electric Solenoid Air Valve Shipped and Sold by BephaMart 1/4inch DC 12V 2 Way Normally Closed Pneumatic Aluminum Electric Solenoid Air Valve WIC Valve 2ACK series 2-way normally closed solenoid valve is to control On/Off of air and inert gas. This solenoid valve has one 1/4" inch NPT inlet and one 1/4" inch NPT outlet port. Valve stays close when the coil is de-energized, and it opens when energized.