This two-stage rotary vane pump is designed to withstand large amounts of water vapor in the vacuum pump’s inlet vapor stream. This “water vapor tolerance” is the maximum inlet pressure point at which the pump is able to operate with pure water/fluids and at the same time prevents condensation inside the pump. Due to the high pumping speed and easy-to-clean, compact housing, this pump is ideally suited for use in laboratory applications within rough and fine vacuum ranges from 1 to 2 x 10^–3 mbar.