Scentry III-GFRAB .5 In Gas Valves Case of 6 diaphragm type gas valves , each .5 inch diameter, for use with any Scentry gas detector system , ie. the SFGVC, GFRAB and the GFA unit not included . These are UL listed gas valves that replace White Rodgers Part # 2509-254. Use the gas valve controller not included to protect your home or building from gas explosions or fires from gas leaks. These are electrically operated shutoff valves that open and close on a demand signal from a thermostat or other controlling device. Can be used with both natural gas and LP gas at pressures up to 0.5 psi. The White Rodgers replacement is a compression spring closing and soft seat construction gas valve. Scentry III GVD Gas Valve Specifications Dimensions 3 inches high by 1.84 inches wide by 3 inches long Voltage 24 VAC, 60 Hz Inlet/Outlet Size .5 inches x .5 inches. BTU Capacity 240,000 Amp Rating 0.3A, 5W Electrical Connections 30 inches Replaces White Rodgers Part # 2509-254 GFRAB and the GFA require use of this valve or the equivalent 3/4 or 1 inch GVD valves. Maximum inlet pressure 0.5 psi Permissible ambient surface temperature is 40 to 175 degrees F, CSA, 40 to 140 degrees F, UL Two 30 inch leads Agency Listing CSA AGA/CGA Certificate number 229521-1656058 Australian Gas Association Certificate number 4235 UL Recognized File Number MH5939 This item ships from a separate warehouse and may require extra time for delivery.