The Peabody Blast Furnace Gas (B.F.G.) burner from Hamworthy Combustion Engineering has been designed for use in boilers, furnaces and fired heaters that utilise low calorific value gas as the main fuel. The burner is a volute plenum chamber, which the gas enters tangentially and flows In a single uninterrupted stream until it leaves through the unobstructed annular exit port into a refractory throat.