UNITED WORKS

FLAME ARRESTORS, FLASH BACK ARRESTORS AND L.P.GAS BALL VALVES Flame Arresters are safety devices for arresting and extinguishing flames traveling within pipelines containing flammable gases. They operate on the principle of reducing the flames speed, dissipating and absorbing the heat developed by it to lower the temperature to below that of ignition within the arrester. They are also designed to ensure a minimal pressure drop under normal working conditions. FLAME ARRESTORS Regd. Design No. Applied for Model N O . Inlet Size Outlet Size FA-1 1 / 2 " Flanged to ANSI #150 R.F. 1 / 2 " Flanged to ANSI #150 R.F. FA-2 1" Flanged to ANSI #150 R.F. 1" Flanged to ANSI #150 R.F. FA-3 1 1 / 2 " Flanged to ANSI #150 R.F. 1 1 / 2 " Flanged to ANSI #150 R.F. FA-4 2" Flanged to ANSI #150 R.F. 2" Flanged to ANSI #150 R.F. FLASH BACK ARRESTORS Flash Back Arresters are most commonly used in Oxy - Fuel welding and cutting. They are installed in a pipeline or at the end of the tapping point prior to the torch. They stop the flame from burning back upstream of the pipeline and causing damage or explosions. They are designed to allow free flow of gas through them but to take out the heat of the flame front so as to bring it below the ignition temperature of the burning gas mixture. Model No. Inlet Size Outlet Size XBA-1 1 / 2 " B.S.P.P.F. 1 / 2 " B.S.P.P.F. XBA-2 1" B.S.P.P.F. 1" B.S.P.P.F. XBA-3 1 1 / 2 " B.S.P.P.F. 1 1 / 2 " B.S.P.P.F. XBA-4 2" B.S.P.P.F. 2" B.S.P.P.F. L.P. GAS BALL VALVES These two piece L P. Gas ball Valves have their bodies fabricated from carbon steel and working parts from stainless steel. Seat and gland washers are P.T.F.E.. These valves are full bore, anti-static and fire safe. The lever and spindle have a dual lock system for quarter turn operation. Model No. Inlet Size Outlet Size BLV-1 1 / 2 " B.S.P.P.F. 1 / 2 " B.S.P.P.F. BLV-2 1" B.S.P.P.F. 1" B.S.P.P.F. BLV-3 1 1 / 2 " B.S.P.P.F. 1 1 / 2 " B.S.P.P.F. BLV-4 2" B.S.P.P.F. 2" B.S.P.P.F. Regd. Design No. Applied for