In applications where high pressure gas is required, a special mechanical device is used for increasing the pressure of gas by reducing its volume. This mechanical device called gas compressor is used in applications, like refrigeration and air conditioner equipment, petroleum refineries, gas turbine systems, aircraft, natural gas processing plants, jet engines, submarines, rail and heavy road transport vehicles, service stations, auto repair shops, petrochemical and chemical plants, etc. The kinds of gas compressors that our company supplies are reciprocating type air compressor, COG compressor, oxygen compressor, and refrigeration compressor. The reciprocating type air compressor is a kind of positive displacement compressor, which is driven by either electric motor or internal combustion engine. Small capacity reciprocating type air compressor are used in automotive applications, while larger reciprocating compressors are found in petroleum and other industries.