Piston pump
HENGYUHANG Axial Piston Fixed Pump HYH2FO Series 6
HENGYUHANG HYH2FO Series 6 is a heavy-duty fixed displacement axial piston pump utilizing a bent-axis tapered piston rotary group for open-circuit hydrostatic drives, delivering high overall efficiency, high power density, and continuous pressure capability up to 400 bar (450 bar peak) across mobile and industrial machinery.
| Applications
Engineered for open-circuit hydraulic drives in mobile construction machinery, excavators, wheeled loaders, mobile cranes, concrete mixer trucks, agricultural equipment, drilling rigs, and heavy-duty industrial stationary test benches and hydraulic presses requiring reliable fixed displacement delivery, compact installation dimensions, and long bearing service life.
| Key Technical Specifications
Product Model: HYH2FO Series 6 (Sizes 5, 10, 12, 16, 23, 28, 32, 45, 56, 63, 80, 90, 107, 125, 160, 180, 200, 250, 355, 500, 710, 1000)
Brand Replacement: Bosch Rexroth A2FO Series 6 (Sizes 5 to 1000; open circuit), OEM or as requested.
Displacement: 4.93 cm³/rev to 1000.0 cm³/rev (22 standardized geometric frame sizes)
Rotation Direction: Clockwise (R) or Counter-clockwise (L), viewed from shaft end
Speed Range: Nominal rating n nom 950–5,600 rpm (limiting speed n max up to 1,200–8,000 rpm with boosted inlet)
Peak Pressure: Nominal continuous pressure p nom up to 400 bar / Maximum peak pressure p max up to 450 bar (315/350 bar for Size 5; 350/400 bar for Sizes 250–1000)
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| Overview of HENGYUHANG HYH2FO Series 6 Hydraulic Pumps
The HENGYUHANG HYH2FO Series 6 is a fixed displacement axial piston pump featuring a proven bent-axis rotary group with one-piece tapered pistons and piston sealing rings. Engineered as an exact, seamless 1:1 drop-in replacement for the global Bosch Rexroth A2FO Series 6 family across the entire spectrum from Size 5 up to Size 1000, this unit converts mechanical drive torque into hydraulic fluid power with outstanding volumetric and mechanical-hydraulic efficiency.
Output flow is directly proportional to drive speed and geometric displacement. The heavy-duty bent-axis rotary group features spherical timing plates and tapered pistons that generate minimal frictional losses, deliver exceptional self-priming suction characteristics, and allow continuous high-pressure operation up to 400 bar (with transient peaks to 450 bar on Sizes 10 to 200). Equipped with ISO 3019-2 4-hole or 8-hole mounting flanges, precision-ground DIN 5480 splined drive shafts or DIN 6885 parallel keyed shafts, heavy-duty dynamic FKM shaft seals, and high-pressure SAE J518 service and suction ports, the HYH2FO pump guarantees complete interchangeability, compact package dimensions, and long bearing service life in demanding open circuits.
| Dimension of HENGYUHANG HYH2FO Series 6 Hydraulic Pumps
| Mechanical Installation Interface Specifications
| Frame Size Band | Mounting Flange Standard | Drive Shaft (Splined DIN 5480) | Drive Shaft (Parallel Keyed DIN 6885) | Working Pressure Port B / A | Suction Port S | Case Drain Ports T1 / T2 |
|---|---|---|---|---|---|---|
| HYH2FO5 | Special 2-hole / 4-hole spigot Ø50 mm | — | DIN 6885 A4×4×20 (or Conical 1:10) | Threaded DIN 3852 M18×1.5 (12 deep, 350 bar) | Threaded DIN 3852 M22×1.5 (14 deep, 30 bar) | DIN 3852 M10×1 (8 deep, 30 Nm) |
| HYH2FO10 / 12 / 16 | Similar to ISO 3019-2 4-hole Ø80 mm spigot | A: W25×1.25×18×9g; Z: W20×1.25×14×9g | B: AS8×7×32; P: AS6×6×32 | Threaded DIN 3852 M22×1.5 (14 deep, 450 bar) | Threaded DIN 3852 M33×2 (18 deep, 30 bar) | DIN 3852 M12×1.5 (12 deep) |
| HYH2FO23 / 28 / 32 | ISO 3019-2 4-hole Ø100 mm spigot | A: W30×2×14×9g; Z: W25×1.25×18×9g | B: AS8×7×40; P: AS8×7×40 | SAE J518 1/2 in (Metric thread M10×1.5, 17 deep) | SAE J518 3/4 in (Metric thread M10×1.5, 17 deep) | DIN 3852 M16×1.5 (12 deep); Air bleed R M10×1 |
| HYH2FO45 / 56 / 63 | ISO 3019-2 4-hole Ø125 mm spigot | A: W35×2×16×9g; Z: W30×2×14×9g | B: AS10×8×50; P: AS8×7×50 | SAE J518 3/4 in (Metric thread M10×1.5, 17 deep) | SAE J518 1 in (Metric thread M10×1.5, 17 deep) | DIN 3852 M18×1.5 (12 deep); Air bleed R M12×1.5 |
| HYH2FO80 / 90 | ISO 3019-2 4-hole Ø140 mm spigot | A: W40×2×18×9g; Z: W35×2×16×9g | B: AS12×8×56; P: AS10×8×56 | SAE J518 1 in (Metric thread M12×1.5, 17 deep) | SAE J518 1 1/4 in (Metric thread M10×1.5, 17 deep) | DIN 3852 M18×1.5 (12 deep); Air bleed R M12×1.5 |
| HYH2FO107 / 125 | ISO 3019-2 4-hole Ø160 mm spigot | A: W45×2×21×9g; Z: W40×2×18×9g | B: AS14×9×63; P: AS12×8×63 | SAE J518 1 in (107) / 1 1/4 in (125) | SAE J518 1 1/2 in (Metric thread M12×1.75, 20 deep) | DIN 3852 M18×1.5 (12 deep); Air bleed R M14×1.5 |
| HYH2FO160 / 180 | ISO 3019-2 4-hole Ø180 mm spigot | A: W50×2×24×9g; Z: W45×2×21×9g | B: AS14×9×70; P: AS14×9×70 | SAE J518 1 1/4 in (Metric thread M14×2, 19 deep) | SAE J518 1 1/2 in (Metric thread M12×1.75, 20 deep) | DIN 3852 M22×1.5 (14 deep); Air bleed R M14×1.5 |
| HYH2FO200 | ISO 3019-2 4-hole Ø200 mm spigot | A: W50×2×24×9g | B: AS14×9×80 | SAE J518 1 1/4 in (Metric thread M14×2, 19 deep) | SAE J518 2 in (Metric thread M12×1.75, 17 deep) | DIN 3852 M22×1.5 (14 deep); Air bleed R M14×1.5 |
| HYH2FO250 | ISO 3019-2 4-hole Ø224 mm spigot | Z: W50×2×24×9g | P: AS14×9×80 | SAE J518 1 1/4 in (Metric thread M14×2, 19 deep) | SAE J518 2 1/2 in (Metric thread M12×1.75, 17 deep) | DIN 3852 M22×1.5 (14 deep); Flushing U M14×1.5 |
| HYH2FO355 / 500 | ISO 3019-2 4-hole Ø280 / Ø315 mm spigot | Z: W70×3×22×9g | P: AS20×12×100 | SAE J518 1 1/2 in (Metric thread M16×2, 21 deep) | SAE J518 3 in (Metric thread M16×2, 24 deep) | DIN 3852 M33×2 (18 deep); Flushing U M18×1.5 |
| HYH2FO710 / 1000 | ISO 3019-2 8-hole Ø355 / Ø400 mm spigot | Z: W90×3×28×9g | P: AS25×14×125 | SAE J518 2 in (Metric thread M16×2, 24 deep) | SAE J518 3 1/2 in / 4 in (Metric thread M16×2, 24 deep) | DIN 3852 M42×2 (20 deep); Flushing U M18×1.5 |
| Notes on Port Plates and Service Line Orientations
Port Plate 05: SAE flange port A/B at side and SAE flange port S at rear (Standard configuration for Sizes 23 to 250).
Port Plate 06: Threaded port A/B at side and threaded port S at rear.
Port Plate 07: Threaded ports A/B and S at side (Standard for Size 5).
Port Plate 11: SAE flange ports A/B and S at rear (Standard for Sizes 355 to 1000).
| Pump Installation Specifications
| Complete Ordering Code Structure
HYH2F−[Fluid]−[Bearing]−O−[Size]/6[Index]−[Rotation][Seals][Shaft][Flange][Port Plate]−[Option]
| Position | Code Segment | Available Designations & Options | Technical Description & Functional Purpose |
|---|---|---|---|
| 01 | Hydraulic Fluid | Blank / E- | Blank: Mineral oil and HFD fluids; E-: HFB, HFC fluids (Sizes 250 to 1000 with long-life bearing) |
| 02 | Axial Piston Unit | HYH2F / A2F | Bent-axis design, fixed displacement |
| 03 | Drive Shaft Bearing | Blank / L | Blank: Standard heavy-duty bearing; L: Long-Life bearing execution for extreme endurance |
| 04 | Operating Mode | O | Pump, open-circuit hydrostatic drive |
| 05 | Geometric Size | 5 to 1000 | 22 displacement ratings: 5, 10, 12, 16, 23, 28, 32, 45, 56, 63, 80, 90, 107, 125, 160, 180, 200, 250, 355, 500, 710, 1000 |
| 06 | Series | 6 | Series 6 |
| 07 | Index | 0, 1, 3 | 1: Sizes 10 to 180; 3: Size 200; 0: Size 5 and Sizes 250 to 1000 |
| 08 | Direction of Rotation | R, L | Viewed facing drive shaft: Clockwise (R) or Counter-clockwise (L) |
| 09 | Sealing System | V | FKM (fluorocarbon rubber) high-temperature, high-pressure dynamic seals |
| 10 | Drive Shaft Type | A, Z, B, P, C | A / Z: Involute splined shaft DIN 5480; B / P: Parallel keyed shaft DIN 6885; C: Conical keyed shaft (Size 5) |
| 11 | Mounting Flange | B, H | B: ISO 3019-2 4-hole flange; H: ISO 3019-2 8-hole flange (Sizes 355 to 1000) |
| 12 | Port Plates | 05, 06, 07, 11 | 05: SAE A/B side, S rear; 06: Threaded A/B side, S rear; 07: Threaded side; 11: SAE A/B and S rear |
| 13 | Special Version | Blank / -Y / -S | Standard production / Installation variants (e.g. port T modified) / Special custom version |
| Reading Your Replacement Code
| Rexroth OEM Model Code | HENGYUHANG Drop-In Code | Displacement | Rotation & Seals | Flange & Drive Shaft | Port Plate Configuration |
|---|---|---|---|---|---|
| A2FO16/61R-VPB06 | HYH2FO16/61R-VPB06 | 16.0 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø80 spigot, DIN 6885 parallel keyed shaft | Threaded M22 side / M33 rear |
| A2FO28/61R-VAB05 | HYH2FO28/61R-VAB05 | 28.1 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø100 spigot, DIN 5480 splined shaft | SAE 1/2" side / 3/4" rear |
| A2FO45/61R-VBB05 | HYH2FO45/61R-VBB05 | 45.6 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø125 spigot, DIN 6885 parallel keyed shaft | SAE 3/4" side / 1" rear |
| A2FO80/61R-VZB05 | HYH2FO80/61R-VZB05 | 80.4 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø140 spigot, DIN 5480 splined shaft | SAE 1" side / 1 1/4" rear |
| A2FO107/61R-VAB05 | HYH2FO107/61R-VAB05 | 106.7 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø160 spigot, DIN 5480 splined shaft | SAE 1" side / 1 1/2" rear |
| A2FO160/61R-VPB05 | HYH2FO160/61R-VPB05 | 160.4 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø180 spigot, DIN 6885 parallel keyed shaft | SAE 1 1/4" side / 1 1/2" rear |
| A2FO250/60R-VZB05 | HYH2FO250/60R-VZB05 | 250.0 cm³/rev | Clockwise, FKM seals | ISO 4-bolt Ø224 spigot, DIN 5480 splined shaft | SAE 1 1/4" side / 2 1/2" rear |
Technical Specifications of HENGYUHANG HYH2FO Series (Sizes 5–1000)
4.1 Frame Size Performance Matrix (Data at pₐᵦₛ=1 bar at suction port S, mineral oil ρ=0.88 kg/L)
Sizes 5 to 63
| Performance Parameter | Unit | HYH2FO5 | HYH2FO10 | HYH2FO12 | HYH2FO16 | HYH2FO23 | HYH2FO28 | HYH2FO32 | HYH2FO45 | HYH2FO56 | HYH2FO63 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Displacement (Vg) | cm³/rev | 4.93 | 10.3 | 12.0 | 16.0 | 22.9 | 28.1 | 32.0 | 45.6 | 56.1 | 63.0 |
| Max Nominal Speed (nₙₒₘ) | rpm | 5,600 | 3,150 | 3,150 | 3,150 | 2,500 | 2,500 | 2,500 | 2,240 | 2,000 | 2,000 |
| Limiting Speed (nₘₐₓ) | rpm | 8,000 | 6,000 | 6,000 | 6,000 | 4,750 | 4,750 | 4,750 | 4,250 | 3,750 | 3,750 |
| Max Flow Rate (qV at nₙₒₘ) | L/min | 27.6 | 32.0 | 38.0 | 50.0 | 57.0 | 70.0 | 80.0 | 102.0 | 112.0 | 126.0 |
| Power at Δp=350 bar | kW | 14.5* | 19.0 | 22.0 | 29.0 | 33.0 | 41.0 | 47.0 | 60.0 | 65.0 | 74.0 |
| Power at Δp=400 bar | kW | — | 22.0 | 25.0 | 34.0 | 38.0 | 47.0 | 53.0 | 68.0 | 75.0 | 84.0 |
| Torque at Δp=350 bar | Nm | 24.7* | 57.0 | 67.0 | 89.0 | 128.0 | 157.0 | 178.0 | 254.0 | 313.0 | 351.0 |
| Torque at Δp=400 bar | Nm | — | 66.0 | 76.0 | 102.0 | 146.0 | 179.0 | 204.0 | 290.0 | 357.0 | 401.0 |
| Rotary Stiffness (c) | kNm/rad | 0.63 | 0.92 | 1.25 | 1.59 | 2.56 | 2.93 | 3.12 | 4.18 | 5.94 | 6.25 |
| Moment of Inertia (J_GR) | kg·m² | 0.00006 | 0.0004 | 0.0004 | 0.0004 | 0.0012 | 0.0012 | 0.0012 | 0.0024 | 0.0042 | 0.0042 |
| Max Angular Acceleration (α) | rad/s² | 5,000 | 5,000 | 5,000 | 5,000 | 6,500 | 6,500 | 6,500 | 14,600 | 7,500 | 7,500 |
| Case Fluid Volume | L | 0.17 | 0.17 | 0.17 | 0.20 | 0.20 | 0.20 | 0.33 | 0.45 | 0.45 | 0.55 |
| Dry Weight (approx.) | kg | 2.5 | 6.0 | 6.0 | 6.0 | 9.5 | 9.5 | 9.5 | 13.5 | 18.0 | 18.0 |
*Power and torque for Size 5 are evaluated at its maximum design pressure Δp=315 bar.
Sizes 80 to 1000
| Performance Parameter | Unit | HYH2FO80 | HYH2FO90 | HYH2FO107 | HYH2FO125 | HYH2FO160 | HYH2FO180 | HYH2FO200 | HYH2FO250 | HYH2FO355 | HYH2FO500 | HYH2FO710 | HYH2FO1000 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Displacement (Vg) | cm³/rev | 80.4 | 90.0 | 106.7 | 125.0 | 160.4 | 180.0 | 200.0 | 250.0 | 355.0 | 500.0 | 710.0 | 1000.0 |
| Max Nominal Speed (nₙₒₘ) | rpm | 1,800 | 1,800 | 1,600 | 1,600 | 1,450 | 1,450 | 1,550 | 1,500 | 1,320 | 1,200 | 1,200 | 950 |
| Limiting Speed (nₘₐₓ) | rpm | 3,350 | 3,350 | 3,000 | 3,000 | 2,650 | 2,650 | 2,750 | 1,800 | 1,600 | 1,500 | 1,500 | 1,200 |
| Max Flow Rate (qV at nₙₒₘ) | L/min | 145 | 162 | 171 | 200 | 233 | 261 | 310 | 375 | 469 | 600 | 852 | 950 |
| Power at Δp=350 bar | kW | 84 | 95 | 100 | 117 | 136 | 152 | 181 | 219 | 273 | 350 | 497 | 554 |
| Power at Δp=400 bar | kW | 96 | 108 | 114 | 133 | 155 | 174 | 207 | — | — | — | — | — |
| Torque at Δp=350 bar | Nm | 448 | 501 | 594 | 696 | 893 | 1,003 | 1,114 | 1,393 | 1,978 | 2,785 | 3,955 | 5,570 |
| Torque at Δp=400 bar | Nm | 512 | 573 | 679 | 796 | 1,021 | 1,146 | 1,273 | — | — | — | — | — |
| Rotary Stiffness (c) | kNm/rad | 8.73 | 9.14 | 11.2 | 11.9 | 17.4 | 18.2 | 57.3 | 73.1 | 96.1 | 144 | 270 | 324 |
| Moment of Inertia (J_GR) | kg·m² | 0.0072 | 0.0072 | 0.0116 | 0.0116 | 0.0220 | 0.0220 | 0.0353 | 0.061 | 0.102 | 0.178 | 0.550 | 0.550 |
| Max Angular Acceleration (α) | rad/s² | 6,000 | 6,000 | 4,500 | 4,500 | 3,500 | 3,500 | 11,000 | 10,000 | 8,300 | 5,500 | 4,300 | 4,500 |
| Case Fluid Volume | L | 0.55 | 0.55 | 0.80 | 0.80 | 1.10 | 1.10 | 2.70 | 2.50 | 3.50 | 4.20 | 8.00 | 8.00 |
| Dry Weight (approx.) | kg | 23 | 23 | 32 | 32 | 45 | 45 | 66 | 73 | 110 | 155 | 325 | 336 |
4.2 Operating Pressure Boundaries
| Size Range | Nominal Pressure pₙₒₘ | Maximum Peak Pressure pₘₐₓ | Single Operating Period | Total Operating Life Under pₘₐₓ |
|---|---|---|---|---|
| Size 5 | 315 bar absolute | 350 bar absolute | ≤10 s | 300 hours |
| Sizes 10 to 200 | 400 bar absolute | 450 bar absolute | ≤10 s | 300 hours |
| Sizes 250 to 1000 | 350 bar absolute | 400 bar absolute | ≤10 s | 300 hours |
System Pressure Thresholds & Suction Rules:
Minimum Pressure on High-Pressure Port (A/B): pₘᵢₙ≥25 bar absolute (required to prevent rotary group separation and cavitation damage).
Rate of Pressure Change (RAₘₐₓ): Up to 16,000 bar/s without pressure-relief valve.
Suction Port Pressure (pₛ at Port S): Minimum pₛₘᵢₙ≥0.8 bar absolute; Maximum pₛₘₐₓ=30 bar absolute.
Limiting Speed (nₘₐₓ): Achievable with boosted inlet pressure (pₐᵦₛ>1 bar) according to the technical data curves.
4.3 Hydraulic Fluid & Temperature Operational Limits
| Fluid Characteristic | Permissible Value | Operational Note |
|---|---|---|
| Recommended Fluid Media | Mineral oil (HL, HLP to DIN 51524) | High-grade anti-wear hydraulic oil |
| Optimum Operating Viscosity (νₒₚₜ) | 16 to 36 mm²/s | Optimal balance of mechanical and volumetric efficiency |
| Continuous Operating Viscosity | 10 to 400 mm²/s | Full performance within permissible temperature limits |
| Minimum Viscosity (νₘᵢₙ) | 7 mm²/s | Short-term limit (t<3 min) at p<0.3⋅pₙₒₘ, Tₘₐₓ=+103 ∘C measured at port T |
| Maximum Viscosity at Cold Start (νₘₐₓ) | 1,600 mm²/s | Permissible at cold start (p≤50 bar, n≤1,000 rpm for Sizes 5–200, n≤0.25⋅nₙₒₘ for 250–1000, T_St≥−40 ∘C) |
| Fluid Temperature Range | −25 ∘C to +90 ∘C | Operating phase with FKM shaft seal; bearing temp max +115 ∘C |
| Cleanliness Class | ISO 4406 Class 20/18/15 | At very high fluid temperatures (+90 ∘C to +115 ∘C), maintain Class 19/17/14 |
| Alternative Fluids | HFB, HFC, HFD, synthetic / environmental | Use Long-Life bearings (L) for HFD and Sizes 250–1000 with HFB/HFC; observe RE 90221 / 90223 |
| Prohibited Fluids | Water-containing HFA fluids | Strictly prohibited; unit not rated for high-water media |
Product Advantages
Heavy-Duty Bent-Axis Rotary Group
Utilizes an axial tapered piston rotary group with spherical valve plate geometry, delivering superior mechanical-hydraulic efficiency and high self-priming capability in open-loop hydrostatic drives.
One-Piece Tapered Piston with Sealing Rings
The integrated one-piece tapered piston design with specialized piston compression rings guarantees exceptional volumetric sealing integrity and minimal blow-by across wide thermal ranges.
Continuous 400 Bar Heavy-Duty Rating
Engineered with a robust, fatigue-resistant cast housing and high-strength rotary components rated for 400 bar continuous working pressure and 450 bar peak transients on Sizes 10 to 200.
High Power Density in a Compact Envelope
Concentrated power output (up to 207 kW on Size 200, up to 554 kW on Size 1000) within small physical dimensions optimizes chassis space in mobile machines and industrial power units.
Comprehensive Size Availability (Sizes 5 to 1000)
Broadest displacement range in the hydraulic industry (from 4.93 cm³/rev to 1000 cm³/rev), allowing precise displacement sizing without throttling losses.
Precision 1:1 OEM Drop-In Compatibility
Exact adherence to ISO 3019-2 4-hole and 8-hole mounting flanges, DIN 5480 involute splines, DIN 6885 keyed drive shafts, and metric SAE port drillings enables zero-modification field replacement of Bosch Rexroth A2FO units.
| 6. Interchangeability & Cross Reference
6.1 Direct Replacement Matrix: Bosch Rexroth A2FO to HENGYUHANG HYH2FO
| Rexroth OEM Model | Displacement | Flange Standard (ISO 3019-2) | Splined Shaft (DIN 5480) | Parallel Keyed Shaft (DIN 6885) | HENGYUHANG Direct Replacement |
|---|---|---|---|---|---|
| A2FO5 | 4.93 cm³/rev | Spigot Ø50 mm | — | A4×4×20 (or Conical 1:10) | HYH2FO5 |
| A2FO10 | 10.3 cm³/rev | 4-Hole Spigot Ø80 mm | W25×1.25 (A) / W20×1.25 (Z) | AS8×7×32 (B) / AS6×6×32 (P) | HYH2FO10 |
| A2FO12 | 12.0 cm³/rev | 4-Hole Spigot Ø80 mm | W25×1.25 (A) / W20×1.25 (Z) | AS8×7×32 (B) / AS6×6×32 (P) | HYH2FO12 |
| A2FO16 | 16.0 cm³/rev | 4-Hole Spigot Ø80 mm | W25×1.25 (A) / W20×1.25 (Z) | AS8×7×32 (B) / AS6×6×32 (P) | HYH2FO16 |
| A2FO23 | 22.9 cm³/rev | 4-Hole Spigot Ø100 mm | W30×2 (A) / W25×1.25 (Z) | AS8×7×40 (B) / AS8×7×40 (P) | HYH2FO23 |
| A2FO28 | 28.1 cm³/rev | 4-Hole Spigot Ø100 mm | W30×2 (A) / W25×1.25 (Z) | AS8×7×40 (B) / AS8×7×40 (P) | HYH2FO28 |
| A2FO32 | 32.0 cm³/rev | 4-Hole Spigot Ø100 mm | W30×2 (A) / W25×1.25 (Z) | AS8×7×40 (B) / AS8×7×40 (P) | HYH2FO32 |
| A2FO45 | 45.6 cm³/rev | 4-Hole Spigot Ø125 mm | W35×2 (A) / W30×2 (Z) | AS10×8×50 (B) / AS8×7×50 (P) | HYH2FO45 |
| A2FO56 | 56.1 cm³/rev | 4-Hole Spigot Ø125 mm | W35×2 (A) / W30×2 (Z) | AS10×8×50 (B) / AS8×7×50 (P) | HYH2FO56 |
| A2FO63 | 63.0 cm³/rev | 4-Hole Spigot Ø125 mm | W35×2 (A) / W30×2 (Z) | AS10×8×50 (B) / AS8×7×50 (P) | HYH2FO63 |
| A2FO80 | 80.4 cm³/rev | 4-Hole Spigot Ø140 mm | W40×2 (A) / W35×2 (Z) | AS12×8×56 (B) / AS10×8×56 (P) | HYH2FO80 |
| A2FO90 | 90.0 cm³/rev | 4-Hole Spigot Ø140 mm | W40×2 (A) / W35×2 (Z) | AS12×8×56 (B) / AS10×8×56 (P) | HYH2FO90 |
| A2FO107 | 106.7 cm³/rev | 4-Hole Spigot Ø160 mm | W45×2 (A) / W40×2 (Z) | AS14×9×63 (B) / AS12×8×63 (P) | HYH2FO107 |
| A2FO125 | 125.0 cm³/rev | 4-Hole Spigot Ø160 mm | W45×2 (A) / W40×2 (Z) | AS14×9×63 (B) / AS12×8×63 (P) | HYH2FO125 |
| A2FO160 | 160.4 cm³/rev | 4-Hole Spigot Ø180 mm | W50×2 (A) / W45×2 (Z) | AS14×9×70 (B) / AS14×9×70 (P) | HYH2FO160 |
| A2FO180 | 180.0 cm³/rev | 4-Hole Spigot Ø180 mm | W50×2 (A) / W45×2 (Z) | AS14×9×70 (B) / AS14×9×70 (P) | HYH2FO180 |
| A2FO200 | 200.0 cm³/rev | 4-Hole Spigot Ø200 mm | W50×2×24×9g (A) | AS14×9×80 (B) | HYH2FO200 |
| A2FO250 | 250.0 cm³/rev | 4-Hole Spigot Ø224 mm | W50×2×24×9g (Z) | AS14×9×80 (P) | HYH2FO250 |
| A2FO355 | 355.0 cm³/rev | 4-Hole Spigot Ø280 mm | W70×3×22×9g (Z) | AS20×12×100 (P) | HYH2FO355 |
| A2FO500 | 500.0 cm³/rev | 4-Hole Spigot Ø315 mm | W70×3×22×9g (Z) | AS20×12×100 (P) | HYH2FO500 |
| A2FO710 | 710.0 cm³/rev | 8-Hole Spigot Ø355 mm | W90×3×28×9g (Z) | AS25×14×125 (P) | HYH2FO710 |
| A2FO1000 | 1000.0 cm³/rev | 8-Hole Spigot Ø400 mm | W90×3×28×9g (Z) | AS25×14×125 (P) | HYH2FO1000 |
6.2 Common Drive Shaft Execution Mapping
| Shaft Designation Code | Standard Specification | Typical Frame Sizes | Torque Transmission Mode |
|---|---|---|---|
| A | Splined Shaft DIN 5480 | Sizes 10 to 200 | Involute spline for heavy dynamic reversing and high peak pressure |
| Z | Splined Shaft DIN 5480 | Sizes 10 to 1000 | Standard involute spline for heavy-duty hydrostatic direct drive |
| B | Parallel Keyed Shaft DIN 6885 | Sizes 5 to 200 | Cylindrical shaft with keyway for flexible coupling drive |
| P | Parallel Keyed Shaft DIN 6885 | Sizes 10 to 1000 | Cylindrical shaft with keyway for standardized industrial drives |
| C | Conical Shaft (taper 1:10) | Size 5 | Tapered press-fit with threaded pin and woodruff key (DIN 6888) |
| 7. Brand Replacement
Bosch Rexroth (Primary 1:1 direct interchangeability for A2FO Series 6 fixed displacement pumps)
Parker Hannifin, Danfoss, Eaton, and Moog fixed-displacement axial piston units engineered to order upon request
| 8. Applications
Excavators and Mobile Earthmoving Equipment: Auxiliary hydraulic pump driving cooling fans, steering assist circuits, and pilot-pressure feeds.
Mobile Cranes and Material Handlers: Primary or auxiliary pump supplying winch drives, outriggers, and counterweight positioning systems.
Concrete Mixers and Pumping Equipment: Open-circuit water pump drives, auxiliary boom positioning, and drum discharge hydraulics.
Drilling Rigs and Mining Machinery: Continuous high-pressure fluid feed for drill-string handling, mud pump auxiliaries, and hydraulic track tensioners.
Industrial Hydraulic Presses and Stamping Machines: High-efficiency pilot and high-pressure pre-fill circuits requiring fatigue-resistant 400 bar performance.
Marine and Offshore Winch Systems: Reliable deck-machinery power units with optional Long-Life bearings for environmental fluid compatibility.
| 9. Packaging & Shipping
| Packaging Layer | Specification & Protection Material | Safety Standard |
|---|---|---|
| Inner Protection | Corrosion-inhibiting VCI plastic wrap, desiccants, and heavy-duty port thread plugs | Prevents moisture, atmospheric corrosion, and debris contamination |
| Shock Cushioning | Custom-molded high-density expanded polyethylene (EPE) foam enclosure | Absorbs severe multi-axis transit impacts and protects shaft extensions |
| Outer Enclosure | ISPM-15 export-certified solid fumigation-free engineered wooden crate | Structural reinforcement for global ocean, air, and multimodal handling |
| Logistics Options | Express Courier (DHL, FedEx, UPS), Air Freight, LCL/FCL Ocean Cargo, DDP door-to-door | Dispatch in 48–72 hours for standard configurations; tailored tracking provided |
| 10. Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence: State-of-the-art multi-axis CNC machining centers, precision spherical grinding equipment, and sub-micron gear and bearing fitment (Ra < 0.2 μm) guarantee superior rotary group alignment and low internal leakage.
100% Full-Cycle Multi-Parameter Factory Inspection: Every HYH2FO pump undergoes automated test-bench trials verifying volumetric efficiency (> 94%), continuous and peak pressure hold at 400/450 bar, internal case leakage limits, response hysteresis, and vibration/noise spectra prior to dispatch.
Seamless 1:1 OEM Drop-In Interchangeability: Engineered to match European DIN, ISO 3019-2, and SAE standards down to the millimeter, allowing immediate replacement of Bosch Rexroth A2FO units with zero pipe rework or bracket modification.
Flexible Engineering Customization & Rapid Prototyping: In-house hydraulic engineering team provides tailored control-valve calibrations, special shaft profiles, auxiliary flushing ports, and rapid prototype turnarounds with minimal MOQ requirements.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: Continuous inventory of finished cast bodies, bearing kits, rotary groups, and modular port plates enables standardized orders to ship globally within 48 to 72 hours.
12-Month Comprehensive Warranty & Lifetime Technical Support: All units are backed by an unconditional 12-month factory warranty, 24-hour drawing verification service, and lifetime engineering consultation from certified fluid power specialists.
HENGYUHANG Axial Piston Fixed Pump HYH2FO Series (Heavy-Duty Bent-Axis Open-Circuit Hydraulic Pump, 4.93~1000.00 cm³/rev) is a high-pressure, fixed-displacement axial piston pump featuring an advanced tapered piston rotary group in bent-axis design, engineered specifically for hydrostatic drives in open-circuit industrial, stationary, and mobile hydraulic applications. Manufactured by Quanzhou Hengyuhang Power Technology Co., Ltd. as an engineered, direct-fit interchange for the Rexroth A2FO Series 6 product family, the HYH2FO Series incorporates one-piece precision-machined tapered pistons fitted with dual compression piston rings, high-rigidity spheroidal cast iron bent-axis housings, robust drive shaft bearings, and precision spherical valve plates. The pump delivers high total efficiency (ηt > 91%~93%), exceptional power density, and compact physical dimensions, with output delivery flow directly proportional to drive speed and geometric displacement. Engineered across three standardized pressure tiers—Nominal 315 bar / Peak 350 bar for Size 5; Nominal 400 bar / Peak 450 bar for mainstream Sizes 10 through 200; and Nominal 350 bar / Peak 400 bar for large heavy-duty industrial Frames 250 through 1000—the HYH2FO Series spans 22 standardized frame sizes: 5, 10, 12, 16, 23, 28, 32, 45, 56, 63, 80, 90, 107, 125, 160, 180, 200, 250, 355, 500, 710, and 1000 cm³/rev. Designed with standardized ISO 3019-2 mounting flanges (4-hole type B for sizes 5~250 and 8-hole type H for sizes 355~1000), heavy-duty drive shafts (DIN 5480 involute splined shafts Z/A and DIN 6885 parallel keyed shafts P/B), and versatile fluid porting interfaces (SAE J518 Code 62 high-pressure ports and DIN 3852 threaded ports), the HYH2FO Series serves as an ultra-reliable, cost-effective drop-in replacement for heavy machinery, forging presses, mobile cranes, concrete machinery, and industrial hydraulic power units worldwide.
| Applications
The HYH2FO Series bent-axis fixed displacement pump is engineered for continuous high-pressure open-circuit hydraulic systems requiring rugged durability, low pulsation, and high mechanical-volumetric efficiency:
Heavy Mobile Construction & Earthmoving Machinery: Primary high-pressure hydraulic supply pump for excavator auxiliary circuits, wheel loader steering and bucket actuation, mobile drilling rigs, and heavy road headers.
Mobile Cranes, Concrete Pumps & Transit Mixers: Powers boom hoist cylinders, outrigger deployment jacks, concrete pumping cylinders, and heavy telescopic crane winches.
Heavy Industrial Forging, Baling & Scrap Presses: Delivers reliable 400 bar continuous fluid delivery for metal stamping presses, scrap metal balers, hydraulic shears, and briquetting machines.
Metallurgical Steel Plants & Rolling Mills: Operates furnace charging systems, continuous casting ladle positioners, walking beam conveyors, and heavy plate roll balance cylinders.
Marine Deck Machinery & Offshore Winches: Supplies continuous hydraulic drive power for anchor windlasses, cargo cranes, oceanographic winches, and marine steering gear systems.
Mining Machinery & Tunnel Boring Equipment: Powers continuous miners, underground haulage vehicles, hydraulic roof supports, and tunnel boring machine (TBM) auxiliary hydraulic systems.
| Key Specifications Overview
| Parameter | Hengyuhang HYH2FO Series 6 Engineering Specification |
|---|---|
| Pump Classification | Axial Piston Fixed Displacement Pump in Bent-Axis Design for Open Circuits (HYH2FO Series 6) |
| OEM Interchange Reference | Direct dimensional, functional, and hydraulic drop-in replacement for Rexroth A2FO Series 6 |
| Standard Displacement Range | 22 Standard Frame Sizes: 5, 10, 12, 16, 23, 28, 32, 45, 56, 63, 80, 90, 107, 125, 160, 180, 200, 250, 355, 500, 710, 1000 cm³/rev |
| Nominal Continuous Pressure (pN) | Size 5: 315 bar (31.5 MPa / 4,568 psi); Sizes 10~200: 400 bar (40 MPa / 5,800 psi); Sizes 250~1000: 350 bar (35 MPa / 5,075 psi) |
| Maximum Peak Operating Pressure (pmax) | Size 5: 350 bar (35 MPa / 5,075 psi); Sizes 10~200: 450 bar (45 MPa / 6,525 psi); Sizes 250~1000: 400 bar (40 MPa / 5,800 psi) |
| Rotational Speed Range (at pabs = 1 bar) | Nominal drive speeds from 950 rpm (Size 1000) up to 5600 rpm (Size 5); Limiting maximum speed up to 8000 rpm (Size 5) |
| Flow Delivery Characteristics | Constant fixed displacement delivery flow directly proportional to drive rotational speed and geometric displacement |
| Permissible Suction Pressure (Port S) | pabs min = 0.8 bar absolute continuous self-priming inlet pressure at port S without cavitation |
| Case Drain Pressure Rating (Ports T1 / T2) | Continuous average: ≤ 3.0 bar absolute; Maximum allowable case pressure: ≤ 6.0 bar absolute (at reduced speed) |
| Piston & Rotary Group Architecture | Bent-axis drive shaft with integral drive flange; one-piece tapered pistons with precision compression sealing rings |
| Bearing System & Long-Life Options | Heavy-duty preloaded drive shaft bearings; Standard bearing for sizes 5~200; Optional Long-Life "L" bearings for sizes 250~1000 |
| Mounting Flange Standards | Code B: ISO 3019-2 4-hole metric flange (Sizes 5~250); Code H: ISO 3019-2 8-hole metric flange (Sizes 355~1000) |
| Drive Shaft Configurations | Code Z / A: Involute splined shaft DIN 5480; Code P / B: Cylindrical parallel keyed shaft DIN 6885; Code C: Conical keyed shaft (Size 5) |
| High-Pressure Service Ports (B / A) | SAE J518 Code 62 high-pressure 4-bolt split flange ports (metric DIN 13 fixing threads) or DIN 3852 metric threaded ports |
| Suction Fluid Port (Port S) | SAE J518 Code 61 standard 4-bolt split flange suction port (metric DIN 13 fixing threads) or DIN 3852 metric threaded port |
| Sealing Material System | Code V: Premium FKM fluorocarbon elastomer shaft seal ring and housing O-rings (-25°C to +115°C continuous) |
| Direction of Rotation | Clockwise (Code R: flow S to B) or Counter-Clockwise (Code L: flow S to A), viewed facing input drive shaft |
| Operating Viscosity Range | Optimum: νopt = 16 to 36 mm²/s; Minimum: νmin = 5 mm²/s (short-term, max +115°C); Maximum: νmax = 1600 mm²/s (cold start) |
| Fluid Cleanliness Standard | ISO 4406 Class 20/18/15 minimum (Class 19/17/14 required for high operating temperatures 90°C~115°C) |
| Technical Performance Matrix Across Available Sizes
| Model Number (Hengyuhang Series) | Geometric Displacement Vg (cm³/rev) | Drive Speed (rpm) | Delivery Flow @ n_nom (L/min) | Input Power P (kW) | Drive Torque T (Nm) | Rotary Stiffness c (kNm/rad) | Inertia J_GR (kg·m²) | Case Fill (L) | Unit Mass (kg, approx) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal n_nom | Max. n_max | @ 350 bar | @ 400 bar | @ 350 bar | @ 400 bar | |||||||
| Miniature & Compact Series (Sizes 5 to 45 cm³/rev) | ||||||||||||
| HYH2FO-5 | 4.93 | 5600 | 8000 | 27.6 | 14.5 (315 bar) | — | 24.7 (315 bar) | — | 0.63 | 0.00006 | 0.17 | 2.5 |
| HYH2FO-10 | 10.30 | 3150 | 6000 | 32.0 | 19.0 | 22.0 | 57.0 | 66.0 | 0.92 | 0.00040 | 0.17 | 6.0 |
| HYH2FO-12 | 12.00 | 3150 | 6000 | 38.0 | 22.0 | 25.0 | 67.0 | 76.0 | 1.25 | 0.00040 | 0.17 | 6.0 |
| HYH2FO-16 | 16.00 | 3150 | 6000 | 50.0 | 29.0 | 34.0 | 89.0 | 102.0 | 1.59 | 0.00040 | 0.17 | 6.0 |
| HYH2FO-23 | 22.90 | 2500 | 4750 | 57.0 | 33.0 | 38.0 | 128.0 | 146.0 | 2.56 | 0.00120 | 0.20 | 9.5 |
| HYH2FO-28 | 28.10 | 2500 | 4750 | 70.0 | 41.0 | 47.0 | 157.0 | 179.0 | 2.93 | 0.00120 | 0.20 | 9.5 |
| HYH2FO-32 | 32.00 | 2500 | 4750 | 80.0 | 47.0 | 53.0 | 178.0 | 204.0 | 3.12 | 0.00120 | 0.20 | 9.5 |
| HYH2FO-45 | 45.60 | 2240 | 4250 | 102.0 | 60.0 | 68.0 | 254.0 | 290.0 | 4.18 | 0.00240 | 0.33 | 13.5 |
| Medium & Heavy Industrial Series (Sizes 56 to 200 cm³/rev) | ||||||||||||
| HYH2FO-56 | 56.10 | 2000 | 3750 | 112.0 | 65.0 | 75.0 | 313.0 | 357.0 | 5.94 | 0.00420 | 0.45 | 18.0 |
| HYH2FO-63 | 63.00 | 2000 | 3750 | 126.0 | 74.0 | 84.0 | 351.0 | 401.0 | 6.25 | 0.00420 | 0.45 | 18.0 |
| HYH2FO-80 | 80.40 | 1800 | 3350 | 145.0 | 84.0 | 96.0 | 448.0 | 512.0 | 8.73 | 0.00720 | 0.55 | 23.0 |
| HYH2FO-90 | 90.00 | 1800 | 3350 | 162.0 | 95.0 | 108.0 | 501.0 | 573.0 | 9.14 | 0.00720 | 0.55 | 23.0 |
| HYH2FO-107 | 106.70 | 1600 | 3000 | 171.0 | 100.0 | 114.0 | 594.0 | 679.0 | 11.20 | 0.01160 | 0.80 | 32.0 |
| HYH2FO-125 | 125.00 | 1600 | 3000 | 200.0 | 117.0 | 133.0 | 696.0 | 796.0 | 11.90 | 0.01160 | 0.80 | 32.0 |
| HYH2FO-160 | 160.40 | 1450 | 2650 | 233.0 | 136.0 | 155.0 | 893.0 | 1021.0 | 17.40 | 0.02200 | 1.10 | 45.0 |
| HYH2FO-180 | 180.00 | 1450 | 2650 | 261.0 | 152.0 | 174.0 | 1003.0 | 1146.0 | 18.20 | 0.02200 | 1.10 | 45.0 |
| HYH2FO-200 | 200.00 | 1550 | 2750 | 310.0 | 181.0 | 207.0 | 1114.0 | 1273.0 | 57.30 | 0.03530 | 2.70 | 66.0 |
| Large Heavy-Duty Industrial Series (Sizes 250 to 1000 cm³/rev) | ||||||||||||
| HYH2FO-250 | 250.00 | 1500 | 1800 | 375.0 | 219.0 | — | 1393.0 | — | 73.10 | 0.06100 | 2.50 | 73.0 |
| HYH2FO-355 | 355.00 | 1320 | 1600 | 469.0 | 273.0 | — | 1978.0 | — | 96.10 | 0.10200 | 3.50 | 110.0 |
| HYH2FO-500 | 500.00 | 1200 | 1500 | 600.0 | 350.0 | — | 2785.0 | — | 144.00 | 0.17800 | 4.20 | 155.0 |
| HYH2FO-710 | 710.00 | 1200 | 1500 | 852.0 | 497.0 | — | 3955.0 | — | 270.00 | 0.55000 | 8.00 | 325.0 |
| HYH2FO-1000 | 1000.00 | 950 | 1200 | 950.0 | 554.0 | — | 5570.0 | — | 324.00 | 0.55000 | 8.00 | 336.0 |
| Mounting Flange, Shaft and Port Specifications (Representative Sizes)
| Size Group | ISO 3019-2 Mounting Flange | Drive Shaft Options (DIN 5480 / DIN 6885) | Fluid Port Connections (Service & Suction) |
|---|---|---|---|
| HYH2FO-5 | Similar to ISO 3019-2 4-hole: Pilot Ø50 mm h8 (-0.025 mm); Pitch circle Ø63 mm; 4 × M6 | Keyed B: DIN 6885 A4×4×20 (shaft Ø12 mm, ext. 24 mm); Conical C: 1:10 taper with woodruff key 3×5 (DIN 6888) | Port B(A) Service: DIN 3852 M18×1.5 (12 mm deep, 350 bar); Port S Suction: DIN 3852 M22×1.5 (14 mm deep, 30 bar); Drain T1/T2: M10×1 |
| HYH2FO-10~16 | ISO 3019-2 4-hole: Pilot Ø80 mm h8 (-0.030 mm); Pitch circle Ø100 mm; 4 × Ø9.0 mm holes | Spline Z: DIN 5480 W20×1.25×14×9g; Spline A: W25×1.25×18×9g; Keyed P: DIN 6885 AS6×6×32; Keyed B: AS8×7×32 | Port B(A) Service: DIN 3852 M22×1.5 (14 mm deep, 450 bar); Port S Suction: DIN 3852 M33×2 (18 mm deep, 30 bar); Drain T1/T2: M12×1.5; Bleed R: M8×1 |
| HYH2FO-23~32 | ISO 3019-2 4-hole: Pilot Ø100 mm h8 (-0.035 mm); Pitch circle Ø125 mm; 4 × Ø11.0 mm holes | Spline Z: DIN 5480 W25×1.25×18×9g; Spline A: W30×2×14×9g; Keyed P: DIN 6885 AS8×7×40; Keyed B: AS8×7×40 | Port B(A) Service: SAE J518 Code 62 1/2 in (450 bar, M8×1.25, 15 deep); Port S Suction: SAE J518 Code 61 3/4 in (30 bar, M10×1.5, 17 deep); Drain T1/T2: M12×1.5 |
| HYH2FO-45 | ISO 3019-2 4-hole: Pilot Ø100 mm h8 (-0.035 mm); Pitch circle Ø125 mm; 4 × Ø11.0 mm holes | Spline Z: DIN 5480 W30×2×14×9g; Keyed P: DIN 6885 AS8×7×50 (shaft Ø30 mm k6, ext. 60 mm) | Port B(A) Service: SAE J518 Code 62 3/4 in (450 bar, M10×1.5, 17 deep); Port S Suction: SAE J518 Code 61 1 in (30 bar, M10×1.5, 17 deep); Drain T1/T2: M18×1.5 |
| HYH2FO-56~63 | ISO 3019-2 4-hole: Pilot Ø125 mm h8 (-0.040 mm); Pitch circle Ø160 mm; 4 × Ø13.5 mm holes | Spline Z: DIN 5480 W30×2×14×9g; Spline A: W35×2×16×9g; Keyed P: DIN 6885 AS8×7×50; Keyed B: AS10×8×50 | Port B(A) Service: SAE J518 Code 62 3/4 in (450 bar, M10×1.5, 17 deep); Port S Suction: SAE J518 Code 61 1 in (30 bar, M10×1.5, 17 deep); Drain T1/T2: M18×1.5 |
| HYH2FO-80~90 | ISO 3019-2 4-hole: Pilot Ø140 mm h8 (-0.040 mm); Pitch circle Ø180 mm; 4 × Ø13.5 mm holes | Spline Z: DIN 5480 W35×2×16×9g; Spline A: W40×2×18×9g; Keyed P: DIN 6885 AS10×8×56; Keyed B: AS12×8×56 | Port B(A) Service: SAE J518 Code 62 1 in (450 bar, M12×1.5, 17 deep); Port S Suction: SAE J518 Code 61 1 1/4 in (30 bar, M10×1.5, 17 deep); Drain T1/T2: M18×1.5 |
| HYH2FO-107~125 | ISO 3019-2 4-hole: Pilot Ø160 mm h8 (-0.040 mm); Pitch circle Ø200 mm; 4 × Ø17.5 mm holes | Spline Z: DIN 5480 W40×2×18×9g; Spline A: W45×2×21×9g; Keyed P: DIN 6885 AS12×8×63; Keyed B: AS14×9×63 | Port B(A) Service: SAE J518 Code 62 1 in (Size 107) / 1 1/4 in (Size 125, 450 bar); Port S Suction: SAE J518 Code 61 1 1/2 in (30 bar); Drain T1/T2: M18×1.5 |
| HYH2FO-160~180 | ISO 3019-2 4-hole: Pilot Ø180 mm h8 (-0.040 mm); Pitch circle Ø224 mm; 4 × Ø17.5 mm holes | Spline Z: DIN 5480 W45×2×21×9g; Spline A: W50×2×24×9g; Keyed P: DIN 6885 AS14×9×70; Keyed B: AS14×9×70 | Port B(A) Service: SAE J518 Code 62 1 1/4 in (450 bar, M14×2, 19 deep); Port S Suction: SAE J518 Code 61 2 in (30 bar, M12×1.75, 17 deep); Drain T1/T2: M22×1.5 |
| HYH2FO-200~250 | ISO 3019-2 4-hole: Pilot Ø224 mm h8 (-0.046 mm); Pitch circle Ø280 mm; 4 × Ø22.0 mm holes | Spline A: DIN 5480 W50×2×24×9g (Size 200); Spline Z: DIN 5480 W50×2×24×9g (Size 250); Keyed B/P: DIN 6885 AS14×9×80 | Port B(A) Service: SAE J518 Code 62 1 1/4 in (Size 200) / 1 1/2 in (Size 250, 400 bar); Port S Suction: SAE J518 Code 61 3 1/2 in (Size 200) / 3 in (Size 250); Drain: M22×1.5 |
| HYH2FO-355~1000 | ISO 3019-2 8-hole: Pilot Ø280 h8 (355), Ø315 h8 (500), Ø355 h8 (710~1000); Pitch circles Ø360, Ø400, Ø450 mm | Spline Z: DIN 5480 W60×2 (355), W70×3 (500), W90×3 (710~1000); Keyed P: DIN 6885 AS18×11×100 to AS25×14×125 | Port B(A) Service: SAE J518 Code 62 1 1/2 in (355/500) / 2 in (710/1000); Port S Suction: SAE J518 Code 61 3 1/2 in (355), 4 in (500), 5 in (710/1000) |
| Direct Interchangeability and OEM Replacement Matrix (Rexroth A2FO Series 6)
| Hengyuhang Series Model | OEM Original Rexroth Reference Model | Shaft & Flange Standard | Interchangeability Verification Status |
|---|---|---|---|
| HYH2FO-5 | A2FO 5 / 60R-VBB05 (or 60L-VBB05) | Keyed B Ø12, ISO 4-Bolt Ø50 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-10 / 12 / 16 | A2FO 10 / 12 / 16 / 61R-VAB06 (or VZB06) | Spline W25 / W20, ISO 4-Bolt Ø80 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-23 / 28 / 32 | A2FO 23 / 28 / 32 / 61R-VAB05 (or VZB05) | Spline W30 / W25, ISO 4-Bolt Ø100 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-45 | A2FO 45 / 61R-VZB05 (or VPB05) | Spline W30, ISO 4-Bolt Ø100 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-56 / 63 | A2FO 56 / 63 / 61R-VAB05 (or VZB05) | Spline W35 / W30, ISO 4-Bolt Ø125 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-80 / 90 | A2FO 80 / 90 / 61R-VAB05 (or VZB05) | Spline W40 / W35, ISO 4-Bolt Ø140 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-107 / 125 | A2FO 107 / 125 / 61R-VAB05 (or VZB05) | Spline W45 / W40, ISO 4-Bolt Ø160 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-160 / 180 | A2FO 160 / 180 / 61R-VAB05 (or VZB05) | Spline W50 / W45, ISO 4-Bolt Ø180 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-200 / 250 | A2FO 200 / 63R-VAB05 & A2FO 250 / 60R-VZB05 | Spline W50, ISO 4-Bolt Ø224 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-355~1000 | A2FO 355 / 500 / 710 / 1000 / 60R-VZH11 | Spline W60~W90, ISO 8-Bolt Ø280~355 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| Model Coding & Ordering Structure
| Code Field | Field Designation | Available Standard Codes | Technical Definition & Configuration Meaning |
|---|---|---|---|
| [01] Fluid | Hydraulic Fluid Compatibility | Standard (without code) / E- | Standard: Mineral oil and HFD; Code E-: HFB and HFC water-based fluids (sizes 250~1000 require Long-Life bearings) |
| [02] Unit Type | Axial Piston Pump Series | HYH2F | Bent-axis design, fixed displacement axial piston machine |
| [03] Bearings | Drive Shaft Bearing Arrangement | Standard (without code) / L | Standard: Heavy-duty angular roller bearings; Code L: Long-Life bearings for special fluids and severe endurance cycles |
| [04] Operating Mode | Circuit Operation Mode | O | Open-circuit hydrostatic drive pump |
| [05] Frame Size | Geometric Displacement (cm³) | 5, 10, 12, 16, 23, 28, 32, 45, 56, 63, 80, 90, 107, 125, 160, 180, 200, 250, 355, 500, 710, 1000 | Nominal geometric displacement per revolution Vg in cm³/rev |
| [06] Series | Series Designation | 6 | Series 6 modern bent-axis generation |
| [07] Index | Design Index | 1 / 3 / 0 | Index 1: Sizes 10~180; Index 3: Size 200; Index 0: Size 5 and Sizes 250~1000 |
| [08] Rotation | Direction of Rotation | R / L | Code R: Clockwise rotation (flow S to B); Code L: Counter-Clockwise rotation (flow S to A), viewed facing drive shaft |
| [09] Seals | Seal Material System | V | Code V: Premium FKM (fluorocarbon rubber) seals for high thermal endurance (-25°C to +115°C) |
| [10] Drive Shaft | Input Shaft Configuration | Z / A / P / B / C | Code Z / A: Involute splined shaft DIN 5480; Code P / B: Cylindrical parallel keyed shaft DIN 6885; Code C: Conical shaft |
| [11] Mounting Flange | Mounting Flange Style | B / H | Code B: ISO 3019-2 4-hole metric flange (Sizes 5~250); Code H: ISO 3019-2 8-hole metric flange (Sizes 355~1000) |
| [12] Port Plate | Service Line Port Configuration | 05 / 06 / 11 / 07 | Code 05: Side flange A/B with rear suction S; Code 06: Side threaded A/B with rear suction S; Code 11: Rear flange ports A/B & S |
| Technical Performance Matrix Across Available Sizes
| Model Number (Hengyuhang Series) | Geometric Displacement Vg (cm³/rev) | Drive Speed (rpm) | Delivery Flow @ n_nom (L/min) | Input Power P (kW) | Drive Torque T (Nm) | Rotary Stiffness c (kNm/rad) | Inertia J_GR (kg·m²) | Case Fill (L) | Unit Mass (kg, approx) | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal n_nom | Max. n_max | @ 350 bar | @ 400 bar | @ 350 bar | @ 400 bar | |||||||
| Miniature & Compact Series (Sizes 5 to 45 cm³/rev) | ||||||||||||
| HYH2FO-5 | 4.93 | 5600 | 8000 | 27.6 | 14.5 (315 bar) | — | 24.7 (315 bar) | — | 0.63 | 0.00006 | 0.17 | 2.5 |
| HYH2FO-10 | 10.30 | 3150 | 6000 | 32.0 | 19.0 | 22.0 | 57.0 | 66.0 | 0.92 | 0.00040 | 0.17 | 6.0 |
| HYH2FO-12 | 12.00 | 3150 | 6000 | 38.0 | 22.0 | 25.0 | 67.0 | 76.0 | 1.25 | 0.00040 | 0.17 | 6.0 |
| HYH2FO-16 | 16.00 | 3150 | 6000 | 50.0 | 29.0 | 34.0 | 89.0 | 102.0 | 1.59 | 0.00040 | 0.17 | 6.0 |
| HYH2FO-23 | 22.90 | 2500 | 4750 | 57.0 | 33.0 | 38.0 | 128.0 | 146.0 | 2.56 | 0.00120 | 0.20 | 9.5 |
| HYH2FO-28 | 28.10 | 2500 | 4750 | 70.0 | 41.0 | 47.0 | 157.0 | 179.0 | 2.93 | 0.00120 | 0.20 | 9.5 |
| HYH2FO-32 | 32.00 | 2500 | 4750 | 80.0 | 47.0 | 53.0 | 178.0 | 204.0 | 3.12 | 0.00120 | 0.20 | 9.5 |
| HYH2FO-45 | 45.60 | 2240 | 4250 | 102.0 | 60.0 | 68.0 | 254.0 | 290.0 | 4.18 | 0.00240 | 0.33 | 13.5 |
| Medium & Heavy Industrial Series (Sizes 56 to 200 cm³/rev) | ||||||||||||
| HYH2FO-56 | 56.10 | 2000 | 3750 | 112.0 | 65.0 | 75.0 | 313.0 | 357.0 | 5.94 | 0.00420 | 0.45 | 18.0 |
| HYH2FO-63 | 63.00 | 2000 | 3750 | 126.0 | 74.0 | 84.0 | 351.0 | 401.0 | 6.25 | 0.00420 | 0.45 | 18.0 |
| HYH2FO-80 | 80.40 | 1800 | 3350 | 145.0 | 84.0 | 96.0 | 448.0 | 512.0 | 8.73 | 0.00720 | 0.55 | 23.0 |
| HYH2FO-90 | 90.00 | 1800 | 3350 | 162.0 | 95.0 | 108.0 | 501.0 | 573.0 | 9.14 | 0.00720 | 0.55 | 23.0 |
| HYH2FO-107 | 106.70 | 1600 | 3000 | 171.0 | 100.0 | 114.0 | 594.0 | 679.0 | 11.20 | 0.01160 | 0.80 | 32.0 |
| HYH2FO-125 | 125.00 | 1600 | 3000 | 200.0 | 117.0 | 133.0 | 696.0 | 796.0 | 11.90 | 0.01160 | 0.80 | 32.0 |
| HYH2FO-160 | 160.40 | 1450 | 2650 | 233.0 | 136.0 | 155.0 | 893.0 | 1021.0 | 17.40 | 0.02200 | 1.10 | 45.0 |
| HYH2FO-180 | 180.00 | 1450 | 2650 | 261.0 | 152.0 | 174.0 | 1003.0 | 1146.0 | 18.20 | 0.02200 | 1.10 | 45.0 |
| HYH2FO-200 | 200.00 | 1550 | 2750 | 310.0 | 181.0 | 207.0 | 1114.0 | 1273.0 | 57.30 | 0.03530 | 2.70 | 66.0 |
| Large Heavy-Duty Industrial Series (Sizes 250 to 1000 cm³/rev) | ||||||||||||
| HYH2FO-250 | 250.00 | 1500 | 1800 | 375.0 | 219.0 | — | 1393.0 | — | 73.10 | 0.06100 | 2.50 | 73.0 |
| HYH2FO-355 | 355.00 | 1320 | 1600 | 469.0 | 273.0 | — | 1978.0 | — | 96.10 | 0.10200 | 3.50 | 110.0 |
| HYH2FO-500 | 500.00 | 1200 | 1500 | 600.0 | 350.0 | — | 2785.0 | — | 144.00 | 0.17800 | 4.20 | 155.0 |
| HYH2FO-710 | 710.00 | 1200 | 1500 | 852.0 | 497.0 | — | 3955.0 | — | 270.00 | 0.55000 | 8.00 | 325.0 |
| HYH2FO-1000 | 1000.00 | 950 | 1200 | 950.0 | 554.0 | — | 5570.0 | — | 324.00 | 0.55000 | 8.00 | 336.0 |
| Hengyuhang Series Model | OEM Original Rexroth Reference Model | Shaft & Flange Standard | Interchangeability Verification Status |
|---|---|---|---|
| HYH2FO-5 | A2FO 5 / 60R-VBB05 (or 60L-VBB05) | Keyed B Ø12, ISO 4-Bolt Ø50 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-10 / 12 / 16 | A2FO 10 / 12 / 16 / 61R-VAB06 (or VZB06) | Spline W25 / W20, ISO 4-Bolt Ø80 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-23 / 28 / 32 | A2FO 23 / 28 / 32 / 61R-VAB05 (or VZB05) | Spline W30 / W25, ISO 4-Bolt Ø100 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-45 | A2FO 45 / 61R-VZB05 (or VPB05) | Spline W30, ISO 4-Bolt Ø100 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-56 / 63 | A2FO 56 / 63 / 61R-VAB05 (or VZB05) | Spline W35 / W30, ISO 4-Bolt Ø125 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-80 / 90 | A2FO 80 / 90 / 61R-VAB05 (or VZB05) | Spline W40 / W35, ISO 4-Bolt Ø140 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-107 / 125 | A2FO 107 / 125 / 61R-VAB05 (or VZB05) | Spline W45 / W40, ISO 4-Bolt Ø160 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-160 / 180 | A2FO 160 / 180 / 61R-VAB05 (or VZB05) | Spline W50 / W45, ISO 4-Bolt Ø180 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-200 / 250 | A2FO 200 / 63R-VAB05 & A2FO 250 / 60R-VZB05 | Spline W50, ISO 4-Bolt Ø224 | 100% Direct Physical & Hydraulic Drop-in Replacement |
| HYH2FO-355~1000 | A2FO 355 / 500 / 710 / 1000 / 60R-VZH11 | Spline W60~W90, ISO 8-Bolt Ø280~355 | 100% Direct Physical & Hydraulic Drop-in Replacement |
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