Traditionally in the Oil & Gas industry, low pressure gas has been disposed of by flaring to atmosphere. Today this process is becoming increasingly unacceptable as the industry progresses towards eliminating the emission of greenhouse gases into the atmosphere whilst simultaneously conserving energy. Therefore, the demand for equipment that can safely and economically compress low pressure gas back into the production process is rapidly increasing. Ejectors are ideally suited to this application because they employ high-pressure gas energy to entrain and compress low pressure gas to a pressure where the gas can be recovered into production or used as fuel gas