@jackwyatt It is a rotary positive displacement compressor, designed to provide reliable and efficient operation. The compressor is designed to meet the requirements of the American Petroleum Institute (API) Standard 618 Reciprocating Compressors for the Petroleum, Petrochemical and Natural Gas Industries. It is available in single-stage and multistage versions, and can be used for various applications such as gas compression, gas lift, and gas reinjection. The API 618 compressor is an ideal choice for applications that require a reliable and efficient compressors that can handle a wide range of operating conditions.