Bi-Phase Rotary Separator Turbine is used for separating gas and liquid. The Bi-Phase unit meets or exceeds the separation efficiency of a conventional vessel separator. It operates reliably over a wide range of flows and transient conditions. The unit is able to handle slug flow and normal sand production without damage or loss of separation quality. The Bi-Phase turbine offers one of the highest throughput-to-size ratios of any separation device. The unit's design allows for turndown in increments of 1/8th down to a minimum of 12.5 percent of the inlet flow without affecting performance. Separation efficiency of the gas and liquid exceeds that of a conventional vessel separator, with approximately 75 percent weight and 65 percent space savings.