Motorized Zone Valve; Type 2-Way, Straight-Through; Applicable Standard UL, CSA; Nominal Size 1"; End Connection Soldered x Soldered; Actuation Type Spring Return to Close, 2-Position; Valve Position Normally Closed; Body Material Brass; Valve Timing 15 Second to Open/Close; Input Supply Rating 7.7 Volt Amp 24 Volt AC at 50/60 Hertz; Temperature Rating 50 to 200 Deg F; Pressure Rating 125 PSI (Static), 8 PSI (Differential); Media Handled Hot Water; Inclusions/Features 50 Volt Amp at 24 Volt Pilot Duty and 4.4 Amp Running/26.4 Amp Inrush at 120 Volt AC End Switch, Manual Opener; Application Hydronic Control System; CV Rating 8; Connection Type 18" Lead; Auxiliary End Switch NO-SPDT; Humidity Rating 5 to 95 Percent Non-Condensing