Features: Two-Way On-Off Low Voltage Valves Consist of an Actuator and Valve Assembly for Controlling the Flow of Hot Water Manual Opener (On All Models, Except Straight-Through, Normally Open Valves) for Valve Operation on Power Failure Valve Returns to Automatic Position When Power is Restored All Models May be Installed without Disassembling the Valve Compact Construction for Easy Installation Complete Power Head May be Removed or Replaced without Breaking Plumbing Line Connections or Draining the System Actuator Motor May be Replaced without Removing the Valve Body or Draining the System Specifications: Manufacturer: Honeywell Manufacturer Part Number: V8043E1012 Product Type: Motorized Zone Valve Nominal Size: 3/4" End Connection: Soldered x Soldered Actuation Type: 2-Position, Spring Return to Close Valve Position: Normally Closed Body Material: Brass Valve Timing: 15 Second (Open) Input Supply Rating: 7.7 VA @ 24 VAC 50/60 Hz 0.32 A Temperature Rating: 50 to 200 Degrees F (Fluid) Pressure Rating: 20 PSI (Close-Off), 125 PSI (Static) Media Handled: Hot Water Flow Capacity: 3.5 Cv Electrical Connection: 18" Lead Material Brass: (Seat), Stainless Steel (Stem), EPDM Rubber (Packing), Buna-N Rubber Ball (Plug/Ball/Disc) Ambient Temperature: 125 Degrees F Relative Humidity Range: 5% to 95% (Non-Condensing) Dimensions: 3.8" x 5.1" x 4.55" Weight: 1.9 lb.