3GP and 5GP Series Steam Injection Pumps are widely used in secondary recovery. It increases the flow into wellbore by adding pressure to the reserve and reducing the viscosity of oil at the same time. Steam injection is also applied to primary recovery to optimize efficiency nowadays. This series are one of the first pumps that Maxfully developed for EOR. Input and output sides are interchangeable to allow maximum flexibility. Field proven design guarantees efficiency and reliability.