A reportedly improved material is offered for piston and pressure packaging rings used in the third stage of reciprocating compressors for PET bottle equipment. The co. maintains that the third stage requires more maintenance attention than the rest of the compressor. Many, it says, get less than a six-month service life from their third stages, and frequent repairs increase annual maintenance expenses and cause lost production from downtime. The co. offers a service life guarantee of 12 months, improved rings and a non-water-cooled packaging case "that eliminates maintenance."

PET Compression Service, 281/795-0954. www.petcompression.com