The Bosch Rexroth R900086163, model PGF1-21/4.1RE01VU2, is a high-performance internal gear pump with fixed displacement. This pump is engineered for exceptionally low operating noise and minimal flow pulsation, making it an ideal choice for industrial hydraulic systems where quiet and smooth operation is critical. Its robust design, featuring involute gearing, ensures high efficiency and a long service life across a wide range of speeds and fluid viscosities. The PGF1 series is recognized for its reliability and is suitable for applications in machine tools, industrial power units, and other demanding hydraulic circuits.