Natural gas and petroleum are found in the subsoil content in the porous spaces of certain rocks. In geological structures called fields and they are in contact with water. The contained water in the natural gas can be combined with molecules of low molecular weight and that may cause hydrate formation at low-temperature conditions that may plug the valves and fittings in gas pipeline. In addition, water vapor in natural gas pipelines may condense, causing sluggish flow conditions and may cause corrosion difficulties when it reacts with hydrogen sulfide or carbon dioxide commonly present in gas streams. It is necessary to remove water vapor present in a gas streams and the most effective practice to remove water from natural gas streams is to use triethylene glycol (TEG) as the dehydrating agent. In this work we analyzed the effects of various operating parameters such as temperature, formation of foam, high consumption, circulation rate and solvents losses in the system of dehydration of natural gas with TEG of a liquids extraction plant, the process simulator (Hysys 3.2) is used to simulate complete TEG dehydration flowsheet.