... CETypeOpenControl systemAutomatic alarm systemDetailed Product Description Standard Configuration of Natural Gas Generating Set: Engine: 1,water cooling , 4 stroke 2, ... (Auto transfer switch) D.G.set Performence of Natural Gas Generating Set: 1) Water cooled inside --closed circle water ... be 101.3 kpa, 20 Optional of Natural Gas Generating Set: exhaust pipe,flexible pipe,muffler,charge battery,daily ...