A steady increase for liquefied natural gas (LNG) is observed. For decline in value of equipment is necessary to development a comparative simple LNG-units. The circuit of LNG-unit structurally grouped in blocks, providing the transportation of basic process equipment at bodily after factory testing is considered. In unit the throttle cycle of high pressure with preliminary cooling is used. Its work can be organized on the basis of the equipment automobile gas filling compressor stations. Unit is characterized by high efficiency of liquefaction.