Bosch Rexroth | PVV21-1X045-027RA15DDMB
PVV21-1X/045-027RA15DDMB
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The PVV21-1X/045-027RA15DDMB pump belongs to the PV Fixed Displacement Pumps series from Bosch Rexroth and supplies constant flow to hydraulic automation circuits. A cover-side displacement of 27.4 cm³ per revolution feeds auxiliary loads, while a flange-side displacement of 45.4 cm³ per revolution provides the higher volume required by main actuators. At 1500 rpm these volumes translate to 39 l/min on the cover outlet and 66 l/min on the flange outlet, supporting simultaneous functions in dual-circuit systems. A continuous pressure rating of 175 bar lets the unit operate in medium-pressure power packs without overstressing internal gears. Clockwise rotation matches standard motor drives, the SAE-B mounting flange eases attachment to bell housings, and a cylindrical code A shaft end simplifies keyed coupling installation.
The pump tolerates absolute inlet pressure up to 2.4 bar, a limit that helps prevent cavitation when reservoirs are pressurized. It can run to 1800 rpm at a 1 bar inlet yet must stay above 600 rpm, so controllers can set safe speed windows. Oil cleanliness of ISO 4406 class 20/18/15 is required to curb wear on the gear set. The cover pressure port is sized for SAE 3/4 inch fittings, while the flange pressure port accepts SAE 1 inch connections, allowing each circuit to use hoses matched to its flow. A shared suction line enters through an SAE 2 1/2 inch port to keep inlet velocity low, and NBR sealing contains standard hydraulic fluids across the stated pressure range.
Technical Specifications
Continuous Pressure (pvv)
175 bar
Direction Of Rotation
Clockwise
Displacement (cover Side)
27.4 cm3/rev
Displacement (flange Side)
45.4 cm3/rev
Fluid Cleanliness Class
20/18/15 (ISO 4406)
Max Flow At 1500 Rpm (cover)
39 l/min
Max Flow At 1500 Rpm (flange)
66 l/min
Max Inlet Pressure (abs)
2.4 bar
Max Speed (1 Bar Inlet)
1800 rpm
Minimum Speed
600 rpm
Mounting Flange
SAE-B
Pressure Port Size (cover)
SAE 3/4 in
Pressure Port Size (flange)
SAE 1 in
Seal Material
NBR
Shaft End Type
Cylindrical (A)
Suction Port Size
SAE 2 1/2 in
1620 Old Apex Road
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