Lock-Up, Balanced Valve Nominal Size 4 Inch End Connection Flanged x Flanged End to End Distance 13.3 Inch Body Material Aluminum Temperature Rating -40 to 200 Deg F Pressure Rating 10 PSI (Inlet), 25 PSI (Emergency Exposure Limit) Application Gas Fired Boiler, Steam Generator, Industrial Furnace and Oven Applicable Standard UL, CSA (Canada and US), CE Gas Type Natural, Mixed Gas, Liquefied Petroleum Gas and LP Gas Air Mixture Vent Pipe Connection 3/4 Inch Threaded Swing Radius 18 Inch Size 18 Inch Width x 24.3 Inch Height Pressure Drop Rating 55000 BTU/Hour