Wafer Style Butterfly compact design low torque Butterfly Damper MKG, MKL, MKR (Please contact us for specific needs):Used to control the flow of gas and combustion air which burner needs;Wafer Style Butterfly, compact design and low torque;Maximum inlet pressure: 300mbar. Low leakage rate and pressure drop;MKG is used for natural gas, town gas, LPG and other gases with a medium temperature ...