Zone Valve; Type 3-Way; Applicable Standard UL; Nominal Size 1/2"; End Connection Soldered x Soldered; Actuation Type Spring Return; Valve Position Normally Closed; Body Material Brass; Valve Timing 30 Second Normally Open; Input Supply Rating 9.6 VA at 120 Volt AC 60 Hertz 0.08 Amp; Temperature Rating 40 to 200 Deg F Fluid; Pressure Rating 20 PSI Close Off, 125 PSI Static; Inclusions/Features Easy Installation, Manual Opener for Valve Operation; Application Hydronic Control, Heating, Cooling, Steam Control, Fan Coil Unit; Overall Dimension 3-1/2" Width x 2-3/8" Depth x 4-5/8" Height; Maximum Differential Pressure 20 PSI Close off; Electrical Connection 18" Leads; Flow Coefficient 4; Seat Material Brass; Stem Material Stainless Steel; Ball Plug Material Buna-N Rubber Ball; Disc Material Buna-N Rubber Ball; Packing Material EPDM Rubber O-Ring