Bosch Rexroth | PVV21-1X055-027RA15DDMB
PVV21-1X/055-027RA15DDMB
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The PVV21-1X/055-027RA15DDMB pump belongs to the PV Fixed Displacement Pumps series and is manufactured by Bosch Rexroth. It supplies two displacement stages to drive hydraulic actuators in automation systems. The flange stage moves 55.2 cm3 of fluid per revolution, while the cover stage delivers 27.4 cm3 per revolution, so the unit can feed separate circuits at different flow rates. Rotation is clockwise, matching common right-hand drive shafts in mobile and industrial power units. A minimum shaft speed of 600 min-1 prevents flow ripple, and the maximum permitted speed of 1800 min-1 at a 1 bar inlet supports high-output cycles without cavitation. The body mounts on an SAE-B flange, allowing straightforward interchange with standard motors. Pressure lines exit through an SAE 1 in port at the flange stage and an SAE 3/4 in port at the cover stage, keeping connection hardware within widely available fitting sizes.
The pump sustains continuous service at 175 bar on the flange stage and 210 bar on the cover stage, supplying stable pressure to downstream valves and cylinders. A maximum absolute inlet pressure of 2.4 bar limits loading on the shaft seals, while the minimum absolute inlet pressure of 0.83 bar defines the lowest suction head that avoids vapor formation. Fluid enters through an SAE 2 1/2 in suction port sized for low velocity flow, reducing the risk of air entrainment. Version A of the shaft tolerates up to 250 Nm of torque, permitting direct coupling to medium-power prime movers. An NBR seal set resists common hydraulic oils and maintains leakage control across the stated pressure range. These parameters keep the PVV21-1X/055-027RA15DDMB reliable in fixed-displacement circuits that demand predictable flow and long service life.
Technical Specifications
Continuous Pressure (cover Stage)
210 bar
Continuous Pressure (flange Stage)
175 bar
Direction Of Rotation
Clockwise
Displacement (cover Stage)
27.4 cm3/rev
Displacement (flange Stage)
55.2 cm3/rev
Max Absolute Inlet Pressure
2.4 bar(abs)
Max Speed (1 Bar Inlet)
1800 min-1
Min Absolute Inlet Pressure
0.83 bar(abs)
Min Speed
600 min-1
Mounting Flange
SAE-B
Permissible Shaft Torque (version A)
250 Nm
Pressure Port Size (cover Stage)
SAE 3/4 in
Pressure Port Size (flange Stage)
SAE 1 in
Seal Material
NBR
Suction Port Size
SAE 2 1/2 in
1620 Old Apex Road
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