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1. What type of hydraulic pump is the Rexroth A4FO/A4F0 Series?
The Rexroth A4FO/A4F0 Series (including A4FO180, A4FO250, and H-A4FO50030R-PZH25N00) are high-pressure variable displacement axial piston pumps (hydraulic plunger pumps) engineered by Bosch Rexroth. Designed for heavy-duty industrial and mobile hydraulic systems, they feature robust swashplate technology, high efficiency, and precise flow control—ideal for applications demanding extreme pressure, large flow, and long-term reliability.
2. What is the difference between A4FO and A4F0 Series?
The core distinction lies in design iteration and performance optimization (note: “A4F0” is often a typographical variant of “A4FO,” but per Rexroth’s official nomenclature):
- A4FO Series: The standard high-performance line, optimized for medium-to-large displacement (180–500 cm³/rev) and ultra-high pressure operation. It adopts a robust axial piston swashplate design with load-sensing or pressure-compensated control, suitable for heavy-duty mobile and industrial systems.
- “A4F0” typically refers to the same A4FO Series (common typo in part documentation); Rexroth’s official model prefix for this category is “A4FO” (no official “A4F0” sub-series).
3. How to interpret the model code “H-A4FO50030R-PZH25N00”?
Rexroth’s model coding follows strict technical conventions (aligned with the brand’s official datasheets):
| Model Segment | Detailed Meaning |
|---|---|
| H | Mounting/Configuration Code: Horizontal mounting (optimized for space-saving installation in industrial machinery; vertical mounting optional by custom order) |
| A4FO | Base Series: Axial piston variable displacement pump (Rexroth’s flagship heavy-duty plunger pump line) |
| 500 | Displacement Code: Theoretical displacement of 500 cm³/rev (core parameter determining maximum flow output) |
| 30 | Control Type Code: 30 = Pressure-compensated + load-sensing (LS) control (automatically adjusts displacement based on system pressure and flow demand for energy efficiency) |
| R | Rotation Direction: Clockwise rotation (viewed from the shaft end; “L” = counterclockwise for custom configurations) |
| PZH25 | Hydraulic Port & Thread Code: PZH25 = Standard high-pressure port configuration with BSPP (British Standard Pipe Parallel) threads (ensures leak-proof sealing under ultra-high pressure) |
| N00 | Seal & Version Code: N00 = Standard nitrile rubber (NBR) seals for conventional hydraulic oils; “วี” variants available for Viton® seals (high-temperature/corrosive resistance) |
4. What are the key performance specifications of A4FO Series models (e.g., A4FO180, A4FO250, H-A4FO50030R-PZH25N00)?
| Parameter | A4FO180 | A4FO250 | H-A4FO50030R-PZH25N00 |
|---|---|---|---|
| Nominal Displacement | 180 cm³/rev | 250 cm³/rev | 500 cm³/rev |
| Maximum Working Pressure | 40 MPA (400 kgf/cm²) | 40 MPA | 45 MPA (peak: 50 MPa short-term) |
| ช่วงความเร็ว | 800–2800 rpm | 800–2600 rpm | 600–2400 rpm |
| Theoretical Flow (2000 รอบต่อนาที) | 360 l/นาที | 500 l/นาที | 1000 l/นาที |
| ประสิทธิภาพปริมาตร | ≥ 95% | ≥ 95% | ≥ 94% |
| Total Efficiency | ≥ 90% | ≥ 90% | ≥ 89% |
