Electric Valve Actuator; Type Proportional Control; Operation Type Spring Return; Voltage Rating 20 to 30 Volt AC or 24 Volt DC; Minimum AC Voltage 20 Volt; Maximum AC Voltage 30 Volt; Maximum DC Voltage 24 Volt; Frequency Rating 50/60 Hertz; Power Rating 12 Volt Amp; Enclosure NEMA 2, IP42; Application HVAC System; Approval UL 873, CSA C22.2, CE; Temperature Rating 32 to 122 Deg F (Ambient), 35 to 250 Deg F (Fluid); Pressure Rating 15 PSIG