NORMALLY OPEN VENT VALVE, ANSI NPT THREADED CARBON STEEL BODY, BUNA O-RINGS/ BUMPER, TRIM PKG 2, 115V 60HZ MOTOR/SOLENOID, 2.5 SEC TIMING, VCS1/NONE SWITCHES, NEMA 4 ENCLOSURE, FM; EAC; CSA; GAR; UKCA; UL AGENCY APPROVALS