... approved 3.ATS/AMF is optional 4.Fuel :natural gas 20-800KW cummins gas generator series ModelOutputCumminsDiesel engineKVAKWJGC20NG25204B3.9-G2JGC25NG31.25254BT3 ... /m3, CH4 >=85% (By Volume), S<=460 mg/m3, H2S <= 20 mg/m3 Gas Pressure: 80--200kpa (mounded by pressure-reduced ... condition of natural gas volumes must be 101.3 kpa, 20