Bosch Rexroth AZPF-21-022RNL20KB external gear pump

AZPF-21-022RNL20KB, manufacturer material number 0510725044, is a Bosch Rexroth AZPF fixed-displacement external gear pump with geometric displacement 22.5 cm³/rev. The factory execution has clockwise rotation viewed on the drive shaft, tang drive and two-bolt mounting, 52 mm compressor port. Body seals are NBR; the shaft seal is FKM. The standard rear cover has no integrated control valve.

The exact material-number row specifies intermittent pressure p2 = 160 bar and maximum speed 3000 rpm at p2. Intermittent loading is limited to 20 s by the pressure-definition diagram. These values are not continuous-pressure or peak-pressure settings. Minimum speed depends on the actual Series 2X, nominal size 22, pressure band and oil viscosity in the original table. Suction pressure 0.7–3 bar is absolute. Drive only clockwise as viewed on the shaft.

The technical reference is manufacturer RE10089, edition 2021-11-24. Continuous viscosity is 12–800 mm²/s, with 20–100 mm²/s recommended; minimum speed must be selected from the matching size, bearing-series, viscosity and pressure-band row. The original exact material-number table gives a catalog mass of 4 kg. The mixed seal arrangement does not establish a combined material temperature envelope.

Representative manufacturer AZPF series photograph. The exact shaft, bearing arrangement, mounting and rotation are defined by the factory article and applicable source page.