Compressed air is used in a variety of ways—from stoking a fire to propelling a jet aircraft --and is produced by many types of machines. Although such mechanisms as pile drivers, fans, or drills use air under pressure to perform some task,...

A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. Compression of a gas naturally increases its temperature. Compressors are similar to pumps: both increase the pressure on a fluid and both can transport...

PLC CRITICAL CONTROL Developers find that avoiding higher-level programming, while II a bit slower, is more than adequate and less costly. Thirteen million people throughout Northern and Central California count on Pacific Gas and Electric Co. (PG&E) to deliver their energy. PG&E's...

Pipeline operators are demanding more effective centrifugal gas compressor seals to prevent complete shutdown of operations, lower operating costs, meet increasing safety concerns and reduce or prevent mass fugitive emissions of gases that are harmful to the environment. Operators are finding out that dry...