Thomas Industrial Services, Inc. offers control valves for setting air flow rates for gas burners. These valves come in sizes ranging from 1 to 6, they feature low pressure drops/leakage rates, angle-of rotation indicators, and a compact/wafer design. Butterfly valves for air applications feature maximum inlet pressure of 4 psig with a operational temperature range of -4°F to 212°F and AlSi housing construction.