A4VSO355DRG/30L-PPB25N00 Rexroth manufactures the original A4VSO355 series piston pump from Germany
Price:
Negotiable
MOQ:
1
Delivery Time:
2 weeks
Brand:
Rexroth
Product Description
A4VSO355DRG/30L-PPB25N00 Rexroth Piston Pump
Rexroth manufactures the original A4VSO355 series piston pump from Germany
Technical Specifications
| Manufacturer / Series | Rexroth A4VSO Series - Swashplate Axial Piston Variable Displacement Pump, Open Circuit |
| Model Code | A4VSO355 DRG / 30L-PPB25N00 |
| Size (Nominal Displacement) | 355 cm³/rev (Vg max) |
| Circuit Type | Open Circuit |
| Control Type | DRG - Pressure Compensator with Remote Pressure Setting (same as DR constant-pressure control, plus pilot port X for remote cut-off pressure adjustment via external relief valve or solenoid reducing valve) |
| Series | 30 Series |
| Rotation | L - Counter-Clockwise (viewed from shaft end) |
| Shaft | P - Metric parallel keyed shaft (DIN 6885 plain shaft with key) |
| Mounting Flange | B - ISO 4-bolt flange |
| Working Ports | 25 - SAE Flange Ports (Pressure B = SAE 6000 psi 4-bolt flange, Suction S = SAE 3000 psi 4-bolt flange, side-mounted 90° apart) |
| Through-Drive / Aux Pump | N00 - No through-drive, no auxiliary pump |
| Seal Material | P - NBR (Nitrile, for mineral oil HLP); V = FKM(Viton) for HFC-compatible versions |
| Nominal Pressure | 350 bar (35 MPa) |
| Peak / Max Pressure | 400 bar (40 MPa) |
| Max. Speed (at Vg max) | 1500 rpm (A4VSO355 size) |
| Nominal Flow | ≈ 533 L/min @ 1500 rpm (Vg max) |
| Min. Inlet Pressure | 0.8 ~ 2 bar absolute (self-priming, avoid cavitation) |
| Hydraulic Fluid | Mineral oil (HL/HLP per DIN 51524); HFC only with V-seal version |
| Viscosity Range | 10 - 1000 mm²/s (opt. 16-100 mm²/s) |
| Weight (approx.) | ~207 kg |
| Origin | Germany |
Code Breakdown PPB25N00: P=Keyed shaft | P=NBR seal | B=ISO 4-hole flange | 25=SAE flange side ports (vs. "13" = metric threaded) | N00=No thru-drive aux pump.
DRG = DR pressure compensator with remote pilot port (X) -- the pressure cut-off setpoint can be shifted remotely by applying pilot pressure from an external valve, while the handwheel still acts as a mechanical maximum limit stop.
DRG = DR pressure compensator with remote pilot port (X) -- the pressure cut-off setpoint can be shifted remotely by applying pilot pressure from an external valve, while the handwheel still acts as a mechanical maximum limit stop.
Frequently Asked Questions
Q1: What is the difference between DR, DRG, and DFR1 on A4VSO pumps?
- DR (this model minus G): Direct-operated pressure compensator -- cut-off pressure set mechanically only via handwheel on pump.
- DRG (this model): Same pressure compensator plus remote pilot port X -- an external relief or reducing valve can set/change the cut-off pressure remotely (e.g., dual-pressure staging via solenoid), while the handwheel sets the max safety limit.
- DFR1: Pressure + Flow (Load Sense) controller -- maintains constant Δp for energy-saving flow control, more complex than DR/DRG.
Q2: This model has "L" (counter-clockwise). Can I substitute an "R" (clockwise) version?
Only if your drive motor can be reversed. "L" = CCW viewed from shaft end, "R" = CW. Pump housings and port orientations are identical, but rotation direction is not interchangeable unless you change motor rotation. Always verify motor rotation before ordering.
Q3: Does A4VSO355 require a case drain line? How to plumb it?
Yes, a case drain (housing leakage / L-port) line is mandatory. Return it directly to tank above the oil level or via a standpipe ≤ 0.5 bar backpressure. Never block it or tee into the suction line -- excessive case pressure will blow the shaft seal. Fill the case with clean hydraulic oil before first start-up.
Q4: Port code "25" vs "13" -- what's the difference and what fittings do I need?
"13" = side ports with metric BSPP (G) threads; "25" = side ports with SAE 4-bolt flanges (Pressure port typically SAE Code 61 / 6000 psi, Suction SAE Code 62 / 3000 psi). This model uses "25" -- you need SAE split-flange halves and O-rings, not threaded adaptors.
Q5: How is the remote pressure setpoint (DRG) applied?
Connect a remote pilot relief/reducing valve to the X port on the DRG controller. Pilot pressure at X maps to pump cut-off pressure per the spring ratio (typically 0-10 bar pilot = 0-350 bar pump cut-off). The mechanical handwheel on the pump sets the upper limit -- the actual cut-off is the lower of the two (handwheel limit vs. pilot-derived setpoint).
Q6: Critical installation & filtration requirements?
- Filtration: Maintain system cleanliness ≤ NAS 9 (≈ ISO 4406 17/15/12), 10 µm or finer return/full-flow filter.
- Suction: Keep inlet line short and generously sized; min. inlet pressure 0.8 bar abs; 100-150 mesh suction strainer recommended.
- Alignment: Flexible coupling only -- no radial/axial shaft loads from the motor.
- Bleeding: Vent pump housing and system high-points before initial run to prevent air-lock/cavitation damage.
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