Presto ChemTech offers Gas Turbine. Presto ChemTech offers a range of Super Impellers, Hydrofoils, Axial, Radial and many more. The Gas Turbine is an impeller that provides excellent gas handling. The Gas Turbine breaks the gas molecules into smaller bubbles, thus increasing the surface area. The Gas Turbine is designed with special blades that handle higher gas rates for improved process efficiency.