... 5.CE&ISO9001 Main technical specification of 64-140kw natural gas generator Model Number 80-180GFT Brand NameJiaShengPrime power/ ... Description Standard Configuration of Natural Gas Generating Set: Engine: 1,water cooling , 4 stroke 2,ratiation with water tank & fan & safe ... 20 Optional of Natural Gas Generating Set: exhaust pipe,flexible pipe,muffler,charge battery,daily used fuel oil tank and so on ...