Steven Levy Enterprises buys and sells new, unused, and used industrial surplus solenoid valves. Browse our inventory of solenoid valves available for purchase. A solenoid valve is an electrically controlled valve. The valve features a solenoid, which is an electric coil with a movable ferromagnetic core (plunger) in its center. Solenoid valves are control units which either shut off or allow fluid flow. Tell us what surplus solenoid valves you have for sale or call us at 713-910-4337.