PVV4-1X/122LD

The PVV4-1X/122LD is a fixed displacement hydraulic pump produced by Bosch Rexroth within the PV Fixed Displacement Pumps series. It provides constant volume flow for power transmission in industrial hydraulic automation. The unit delivers 121.6 cm³ per revolution, enabling stable energy transfer in systems that require predictable displacement. At a shaft speed of 1500 rpm and an oil viscosity of 25 mm²/s, it supplies up to 177 L/min so actuators receive consistent flow during normal duty. Continuous operation is permitted up to 175 bar, allowing it to serve circuits with moderate working pressures. The rotating group tolerates speeds between 600 rpm and 1800 rpm; below the lower limit lubrication is inadequate, while above the upper limit cavitation risk increases. The shaft is designed for anti-clockwise rotation, so installation must match the specified direction. The assembly weighs 23 kg, which influences mounting considerations and handling during maintenance.

The pump is intended for use with HLP mineral oil conforming to DIN 51524-2, ensuring compatible lubricity and oxidation resistance. Fluid cleanliness must be maintained at ISO 4406 code 20/18/15 to protect the internal sliding surfaces from abrasive wear. A flange interface according to SAE-C 127-2 mates the housing to motor adapters, and the overall mounting style follows the SAE J744 flange standard for interchangeability with common drive arrangements. The pressure outlet uses an SAE 1 1/4 threaded connection, positioned on the top of the casing, which simplifies rigid pipe routing and allows trapped air to escape. The suction inlet is an SAE 2 port that provides adequate area to minimize inlet velocity and avoid vapor formation under full flow demand. These connection features, combined with the specified fluid and cleanliness levels, help maintain long service life in automated hydraulic power units.