Knox Western has been in the gas compressor business since 1930. We manufacture compact, heavy-duty, horizontal, balanced opposed, multistage, reciprocating gas compressors. Knox Western has over 3,000 units in service worldwide. These units range in size from 30 to 1500 horsepower. The majority of these units are in unattended natural gas pipeline booster service. Knox Western compressors are also in a variety of demanding petrochemical and refinery services. These include high pressure hydrogen, helium, cyclohexane, methyl chloride, ammonia, nitrogen, and more. Knox Western compressors meet the requirements of API 618.