Valve assy o-ring. A round Ring used to seal between the Air Injection System Control Valve and its mounting surface. A seal that prevents oil from leaking out, or contaminants from enteRing the EVAP Control Solenoid. ''O''. Secondary Air Injection Control O -. Vapor Canister Purge Solenoid O -. Included with: Air Valve, Control Valve, Valve assembly.