PVV21-1X/068-036RA15DDMB

The PVV21-1X/068-036RA15DDMB pump is produced by Bosch Rexroth as part of the PV Fixed Displacement Pumps series and is intended to deliver steady oil flow for hydraulic automation loops. A cover-side displacement of 36.4 cm³ per revolution defines the volume transferred every rotation, giving designers a fixed basis for cylinder speed calculations. The cover-side can operate continuously at 210 bar, so actuators on that circuit can be sized for mid-pressure tasks without extra safety margins. At 1,500 rpm the cover-side reaches a maximum flow of 53 l/min, providing sufficient throughput for moderate travel rates in compact machines. A SAE 3/4 pressure port on the same side simplifies hose selection because it matches common mid-size fittings. The pump is driven through a cylindrical shaft that measures 22.23 mm in diameter, and a key of 4.76 × 31.8 mm locks the hub to prevent torsional slip. Clockwise rotation orientation aligns the unit with standard right-hand prime movers, reducing coupling issues in existing power-take-off layouts.

The flange-side of the same pump offers a larger displacement of 67.5 cm³ per revolution, giving engineers the option to feed high-volume branches from one housing. Continuous pressure on this side is limited to 175 bar, which protects seals while still supporting many mobile and industrial circuits. When the shaft turns at 1,500 rpm the flange-side supplies up to 100 l/min, enabling rapid movement of large-bore cylinders or multiple parallel functions. A SAE 1 pressure port accompanies that higher flow, ensuring adequate line diameter for minimal pressure drop. The unit can run at speeds up to 1,800 min⁻¹ when the inlet pressure is at least 1 bar, permitting quicker duty cycles, and it must not fall below 600 min⁻¹ to maintain internal lubrication. A SAE 2 1/2 suction port accommodates low-restriction intake plumbing for both sections. Total mass is 20 kg, so the pump can be mounted by a single technician while still providing the rigidity needed for continuous industrial service.