The open loop pumps feature a rotating group design with rugged cylinder design and hardened cylinder surfaces, maximum pressure of 4250 psi (293 bar), and a cylinder mounted in polymerous
hydrodynamic journal bearings.
Several other features are designed to enhance the pump's ability to run on low viscosity or special fluids, including sealed front shaft bearings, a swashblock with polymerous
bearings and hardened steel shoes with a specially designed face for increased fluid retention.
androecium and its development in the flower of Thea sinensis L.