Piston pump
HENGYUHANG Axial Piston Variable Displacement Pump HYH10VSO Series 32
Engineered with an advanced swashplate axial piston rotary group for open-circuit hydrostatic drives, the HENGYUHANG HYH10VSO Series 32 variable displacement pump delivers infinitely adjustable flow with hydrostatically unloaded cradle bearings, integrated pre-compression volume (PCV) pulsation reduction, and a nominal continuous operating pressure of 280 bar with peak pressure reaching 350 bar (5,076 psi / 35 MPa).
| Applications
Optimized for high-performance industrial machinery and heavy hydraulic power units, this variable axial piston pump powers plastic injection molding machines, CNC metal-forming and stamping presses, automated machine tool systems, civil engineering power packs, and specialized industrial drives. Featuring standardized ISO 3019-2 4-bolt mounting flanges, universal through-drive capability for tandem pump mounting, and versatile hydraulic/electrohydraulic control devices (DR, DRF/DRS, ED72, ER72, LA...), it provides seamless 1:1 OEM drop-in interchangeability for Bosch Rexroth A10VSO Series 32 pump installations.
| Key Technical Specifications
Product Model: Hengyuhang Axial Piston Variable Displacement Pump HYH10VSO Series 32
Brand Replacement: Bosch Rexroth A10VSO Series 32 (A10VSO 45, 71, 100, 140, 180) OEM or as requested.
Displacement: 45 to 180 cm³/rev across 5 standardized sizes (HYH10VSO 45, HYH10VSO 71, HYH10VSO 100, HYH10VSO 140, HYH10VSO 180)
Rotation Direction: Clockwise (R), counter-clockwise (L) (viewed from drive shaft end)
Speed Range: Nominal rated speed 1,800 r/min (High-speed option S: up to 2,200 to 3,000 r/min depending on frame size)
Peak Pressure: Nominal continuous working pressure 280 bar (4,060 psi); Maximum peak pressure 350 bar (5,076 psi / 35 MPa)
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| Overview of HENGYUHANG HYH10VSO Series 32
The HENGYUHANG HYH10VSO Series 32 represents a high-efficiency medium-pressure axial piston variable displacement pump engineered specifically for open-circuit hydrostatic drive systems. Available across five standardized displacement sizes—HYH10VSO 45, HYH10VSO 71, HYH10VSO 100, HYH10VSO 140, and HYH10VSO 180 cm³/rev—flow delivery is directly proportional to drive speed and displacement, regulated steplessly by adjusting the swashplate cradle angle. Built with heavy-duty ductile iron housings, hydrostatically unloaded cradle swashplate bearings, and precision-lapped piston-slipper assemblies, the HYH10VSO Series 32 achieves exceptional power density, rapid dynamic control response, and prolonged operational life even under continuous high-duty industrial cycles.
To meet stringent acoustic and hydraulic ripple requirements in modern manufacturing plants, the series integrates an optimized pre-compression volume (PCV) pulsation damping chamber into Port Plate 32, reducing system pressure pulsations by up to 50% and dramatically cutting airborne machine noise. Standardized with an ISO 3019-2 4-bolt mounting flange (Code B), modular universal through-drive (Code U00 / Uxx), and standardized cylindrical keyed (Code P) or involute splined (Code S / R) drive shafts, the HYH10VSO Series 32 provides complete 1:1 functional and physical interchangeability for Bosch Rexroth A10VSO Series 32 pumps without requiring piping, baseplate, or electrical control modifications.
| Dimension of HENGYUHANG HYH10VSO Series 32
| Interface Data Needed with the Drawing Across the 5 Models
| Model / Size (HYH10VSO) | Mounting Flange (ISO 3019-2) | Drive Shaft Options | Working Port B (Outlet) | Suction Port S (Inlet) | Case Drain L, L1 | Control Ports X, MB | Tightening Torques |
|---|---|---|---|---|---|---|---|
| HYH10VSO 45 | 4-bolt flange (pilot Ø 125 -0.063 mm, 6.3 mm depth; 146 mm bolt centers, 4-Ø14 mm holes) | 1. Splined S: 1 in 15T 16/32 DP (ANSI B92.1a); 2. Splined R: 1 in 15T high-torque; 3. Keyed P: Ø 25 mm (DIN 6885 A8×7×36) | SAE 1 in (ISO 6162-1, 350 bar), 4-M10 × 1.5 depth 17 mm | SAE 1-1/2 in (ISO 6162-1, 10 bar), 4-M12 × 1.75 depth 20 mm | M22 × 1.5 (DIN 3852), 14 mm depth | X: M14 × 1.5 / G 1/4; MB: G 1/4 (DIN 3852) | Flange bolt: 140 N·m; Port B bolt: 60 N·m |
| HYH10VSO 71 | 4-bolt flange (pilot Ø 160 -0.063 mm, 6 mm depth; 180 mm bolt centers, 4-Ø18 mm holes) | 1. Splined S: 1-1/4 in 14T 12/24 DP; 2. Splined R: 1-1/4 in 14T high-torque; 3. Keyed P: Ø 32 mm (DIN 6885 A10×8×45) | SAE 1 in (ISO 6162-1, 350 bar), 4-M10 × 1.5 depth 17 mm | SAE 2 in (ISO 6162-1, 10 bar), 4-M12 × 1.75 depth 20 mm | M22 × 1.5 (DIN 3852), 14 mm depth | X: M14 × 1.5 / G 1/4; MB: G 1/4 (DIN 3852) | Flange bolt: 280 N·m; Port B bolt: 60 N·m |
| HYH10VSO 100 | 4-bolt flange (pilot Ø 180 -0.063 mm, 8 mm depth; 200 mm bolt centers, 4-Ø22 mm holes) | 1. Splined S: 1-1/2 in 17T 12/24 DP; 2. Keyed P: Ø 40 mm (DIN 6885 A12×8×68) | SAE 1-1/4 in (ISO 6162-2 High-Pressure, 350 bar), 4-M14 × 2.0 depth 19 mm | SAE 2-1/2 in (ISO 6162-1, 10 bar), 4-M12 × 1.75 depth 17 mm | M33 × 2 (DIN 3852), 16 mm depth | X: M14 × 1.5 / G 1/4; MB: G 1/4 (DIN 3852) | Flange bolt: 450 N·m; Port B bolt: 140 N·m |
| HYH10VSO 140 | 4-bolt flange (pilot Ø 180 -0.063 mm, 8 mm depth; 200 mm bolt centers, 4-Ø22 mm holes) | 1. Splined S: 1-3/4 in 13T 8/16 DP; 2. Keyed P: Ø 45 mm (DIN 6885 A14×9×80) | SAE 1-1/4 in (ISO 6162-2 High-Pressure, 350 bar), 4-M14 × 2.0 depth 19 mm | SAE 2-1/2 in (ISO 6162-1, 10 bar), 4-M12 × 1.75 depth 17 mm | M33 × 2 (DIN 3852), 16 mm depth | X: M14 × 1.5 / G 1/4; MB: G 1/4 (DIN 3852) | Flange bolt: 450 N·m; Port B bolt: 140 N·m |
| HYH10VSO 180 | 4-bolt flange (pilot Ø 180 -0.063 mm, 8 mm depth; 200 mm bolt centers, 4-Ø22 mm holes) | 1. Splined S: 1-3/4 in 13T 8/16 DP; 2. Keyed P: Ø 45 mm (DIN 6885 A14×9×80) | SAE 1-1/4 in (ISO 6162-2 High-Pressure, 350 bar), 4-M14 × 2.0 depth 19 mm | SAE 2-1/2 in (ISO 6162-1, 10 bar), 4-M12 × 1.75 depth 17 mm | M33 × 2 (DIN 3852), 16 mm depth | X: M14 × 1.5 / G 1/4; MB: G 1/4 (DIN 3852) | Flange bolt: 450 N·m; Port B bolt: 140 N·m |
Note: Drive shaft coupling must be equipped with flexible element; radial and axial external shaft loads must remain within catalogue limits.
| Pump Installation Specifications HENGYUHANG HYH10VSO Series 32
| Comprehensive Ordering Code Structure (Aligned with RD 92714 Baureihe 32)
Code structure — reference: HYH10VS−O−Size/32−Rotation−Seals−Shaft−Flange−Port−ThroughDrive−RotaryGroup−Connector
| Position | Code Element | Description & Selection Options |
|---|---|---|
| 01 | Axial Piston Unit | HYH10VS = Swashplate axial piston variable displacement pump, nominal pressure 280 bar, peak pressure 350 bar |
| 02 | Operating Mode | O = Open circuit pump (Pumpe, offener Kreislauf) |
| 03 | Displacement Size (HYH10VSO) | 045, 071, 100, 140, 180 cm³/rev |
| 04 | Control Device | DR = Hydraulic pressure controller; DRF / DRS = Pressure and flow controller (load sensing, X-T open or plugged); DRG = Remote-controlled pressure controller; ED72 = Electrohydraulic pressure control (24 V DC, negative characteristic); ER72 = Electrohydraulic pressure control (24 V DC, positive characteristic); LA... = Power controller with pressure cut-off (LA5D, LA6D, LA7D, LA8D, LA9D, LA.DS, LA.DG, LA.S); DG = Two-point direct hydraulic control |
| 05 | Series | 32 = Series 3, Index 2 (Baureihe 32) |
| 06 | Direction of Rotation | R = Clockwise (rechts); L = Counter-clockwise (links) (viewed from shaft end) |
| 07 | Sealing Material | V = FKM / Viton fluoroelastomer (standard); C = NBR for HFC fire-resistant fluids |
| 08 | Drive Shaft | P = Cylindrical keyed shaft (DIN 6885); S = Involute splined shaft (ISO 3019-1 / ANSI B92.1a); R = Involute splined shaft (reinforced for higher drive torque) |
| 09 | Mounting Flange | B = ISO 3019-2 4-bolt flange |
| 10 | Service Line Ports | 12 = SAE flanged ports top/bottom opposite, metric threads (for through-drive N00/KBx); 22 = SAE flanged ports with universal through-drive without PCV pulsation damping; 32 = SAE flanged ports with universal through-drive with integrated PCV pulsation damping |
| 11 | Through-Drive | N00 / U00 = Without through-drive (sealed rear end cover); U01 = SAE A (82-2) hub 9T 16/32 DP; U52 = SAE A (82-2) hub 11T 16/32 DP; U68 = SAE B (101-2) hub 13T 16/32 DP; U04 = SAE B (101-2) hub 15T 16/32 DP; U07 = SAE C (127-2) hub 14T 12/24 DP; U24 = SAE C (127-2) hub 17T 12/24 DP; UB2 to UB7 = ISO 3019-2 flanged through-drives |
| 12 | Rotary Group Design | E = Standard rotary group (noise-optimized for n = 1500 / 1800 r/min); S = High-Speed rotary group |
| 13 | Connector for Solenoids | H = Hirschmann connector according to DIN EN 175301-803 without quenching diode |
| Reading Your Replacement Code
| Target Bosch Rexroth Part Code | HENGYUHANG HYH Equivalent | Interchange Verification Notes |
|---|---|---|
| A10VSO45DFR1/32R-VPB22U68E | HYH10VSO-045-DRF/32-R-V-P-B-22-U68-E | Direct 1:1 drop-in: HYH10VSO 45, load-sensing DFR/DRF control, Series 32, FKM seals, keyed shaft, SAE B through-drive |
| A10VSO71DR/32R-VSB32U00E | HYH10VSO-071-DR/32-R-V-S-B-32-U00-E | Direct 1:1 drop-in: HYH10VSO 71, DR pressure control, Series 32, splined shaft S, PCV pulsation damping port plate 32 |
| A10VSO100DRF/32R-VSB32U04E | HYH10VSO-100-DRF/32-R-V-S-B-32-U04-E | Direct 1:1 drop-in: HYH10VSO 100, DRF load-sensing, 15T splined shaft, SAE B through-drive with PCV damping |
| A10VSO140ED72/32R-VPB22U07E | HYH10VSO-140-ED72/32-R-V-P-B-22-U07-E | Direct 1:1 drop-in: HYH10VSO 140, electrohydraulic proportional pressure control (24V DC), SAE C through-drive |
| A10VSO180DR/32R-VPB32U00E | HYH10VSO-180-DR/32-R-V-P-B-32-U00-E | Direct 1:1 drop-in: HYH10VSO 180, DR pressure control, keyed shaft P, ISO 3019-2 4-bolt mount, PCV damping |
| Techspecs of HENGYUHANG HYH10VSO Series 32
| 4.1 Standard Rotary Group (Ausführung E) Technical Data Across 5 Models (from RD 92714)
| Parameter / Technical Specification | Symbol | Unit | HYH10VSO 45 | HYH10VSO 71 | HYH10VSO 100 | HYH10VSO 140 | HYH10VSO 180 |
|---|---|---|---|---|---|---|---|
| Geometric Displacement per rev | Vg max | cm³ | 45 | 71 | 100 | 140 | 180 |
| Nominal Drive Speed (at Vg max, p abs ≥ 0.8 bar) | n nom | r/min | 1,800 | 1,800 | 1,800 | 1,800* | 1,800* |
| Max. Flow Delivery (at n nom, Vg max) | qv | l/min | 81 | 128 | 180 | 252 | 324 |
| Flow Delivery at Electric Motor Speed (n = 1500 r/min) | qvE | l/min | 67.5 | 106.7 | 150 | 210 | 270 |
| Nominal Continuous Pressure | p nom | bar | 280 | 280 | 280 | 280 | 280 |
| Maximum Peak Pressure | p max | bar | 350 | 350 | 350 | 350 | 350 |
| Drive Power at n nom and Δp = 280 bar | P | kW | 38.0 | 59.7 | 84.0 | 118.0 | 151.0 |
| Drive Power at n = 1500 r/min and Δp = 280 bar | PE | kW | 31.0 | 50.0 | 70.0 | 98.0 | 125.0 |
| Drive Torque at Δp = 280 bar | M | N·m | 200 | 317 | 446 | 624 | 802 |
| Drive Torque at Δp = 100 bar | M | N·m | 72 | 113 | 159 | 223 | 286 |
| Torsional Shaft Stiffness (Keyed P) | c | N·m/rad | 34,587 | 80,627 | 132,335 | 188,406 | 213,022 |
| Torsional Shaft Stiffness (Splined S) | c | N·m/rad | 29,497 | 71,884 | 121,142 | 169,537 | 227,153 |
| Torsional Shaft Stiffness (Splined R) | c | N·m/rad | 41,025 | 76,545 | — | — | — |
| Rotary Group Moment of Inertia | J TW | kg·m² | 0.0035 | 0.0087 | 0.0185 | 0.0276 | 0.0330 |
| Maximum Angular Acceleration | α | rad/s² | 4,000 | 2,900 | 2,400 | 2,000 | 2,000 |
| Case Fluid Filling Volume | V | l | 1.0 | 1.6 | 2.2 | 3.0 | 2.7 |
| Pump Weight (with Through-Drive 22/32) | m | kg | 32.6 | 51.8 | 76.0 | 90.2 | 89.4 |
*Note: HYH10VSO 140 and HYH10VSO 180 nominal speed specified at absolute inlet pressure p abs ≥ 1.0 bar.
| 4.2 High-Speed Rotary Group (Ausführung S) Speed & Power Limits (from RD 92714)
| Parameter / Model | Unit | HYH10VSO 45 | HYH10VSO 71 | HYH10VSO 100 | HYH10VSO 140 |
|---|---|---|---|---|---|
| Max. High-Speed Limit (n nom at Vg max) | r/min | 3,000 | 2,550 | 2,300 | 2,200 |
| Max. Flow Delivery at High Speed | l/min | 135 | 181 | 230 | 308 |
| Drive Power at High Speed (Δp = 280 bar) | kW | 62.8 | 85.0 | 107.0 | 144.0 |
| 4.3 General Operating Conditions & Fluid Compatibility (Aligned with RD 92714)
| Parameter | Permissible Operating Limits | Optimal Recommended Target |
|---|---|---|
| Operating Hydraulic Fluid | Mineral oil HLP according to DIN 51524 (HF fluids compliant with RD 90225) | Anti-wear premium hydraulic mineral oil |
| Kinematic Viscosity (Continuous) | ν = 10 to 400 mm²/s (cSt) | ν opt = 16 to 36 mm²/s (cSt) |
| Cold Start Viscosity | ν max ≤ 1600 mm²/s (t ≤ 3 min, p ≤ 50 bar, n ≤ 1000 rpm) | System pre-warming recommended |
| Short-Term Viscosity Limit | ν min = 7 to 10 mm²/s (t ≤ 3 min, p ≤ 0.3 × p nom) | Measured at case drain port L, L1 |
| Operating Temperature Range | Standard FKM seals: -25 °C to +110 °C (-13 °F to +230 °F) | +30 °C to +65 °C (+86 °F to +149 °F) |
| Inlet Suction Pressure (Port S) | Standard: p s min ≥ 0.8 bar abs; High-Speed: p s min ≥ 1.0 bar abs; Max p s max = 10 bar | Positive head or vacuum < 0.2 bar |
| Case Drain Pressure (Port L, L1) | Maximum continuous p L max = 2.0 bar absolute (0.5 bar above inlet port S) | Direct unrestricted line to oil reservoir |
| Fluid Cleanliness Requirement | ISO 4406 Class 20/18/15 (NAS 1638 Class 9) | Cleanliness ISO 19/17/14 recommended |
Advantages
Optimized Swashplate Rotary Group Efficiency
Engineered with hydrostatically balanced slipper-pad retention, micro-finished barrel faces, and low-friction cradle bearings, achieving overall total operating efficiency exceeding 91–93%.
Significant Pressure Pulsation Reduction (Integrated PCV)
Built-in pre-compression volume (PCV) in Port Plate 32 dynamically counteracts pressure overshoot and cavitation during cylinder chamber pre-compression, reducing hydraulic line ripple by up to 50% and dramatically cutting machine noise.
Continuous High-Pressure Rating up to 280 bar (Peak 350 bar)
High-integrity ductile cast iron body structure eliminates housing distortion under severe cyclic hydraulic loading.
Comprehensive Modular Control Systems
Supports precision hydraulic pressure cut-off (DR), load-sensing flow regulation (DRF/DRS), remote pilot pressure control (DRG), electrohydraulic proportional control (ED72/ER72), and multi-mode power limiting (LA...).
Universal 100% Through-Drive Architecture
Fully rated through-drive capability allows primary drive power to be transferred 100% to secondary pumps (SAE A, B, C, or ISO auxiliary gear or piston pumps) for compact multi-circuit power packs.
1:1 Direct Drop-In Replacement for Rexroth Series 32
Identical ISO 3019-2 4-bolt mounting flange spigots, drive shaft centerlines, SAE port dimensions, and controller mounting geometry guarantee direct mechanical interchangeability without engineering modifications.
Reference
Displacement & Control Configuration Matrix
Models Available: HYH10VSO 45, HYH10VSO 71, HYH10VSO 100, HYH10VSO 140, HYH10VSO 180 (displacement 45 to 180 cm³/rev).
Controller Architectures:
DR / DRG: Constant pressure regulation / remote proportional pilot control.
DRF / DRS: Dynamic load-sensing flow matching with integrated pressure limiter.
ED72 / ER72: 24V DC proportional solenoid control for automated PLC closed-loop systems.
LA5D to LA9D / LA.DS: Hyperbolic constant power limiting with pressure cut-off and load-sensing override.
Mounting Standards: ISO 3019-2 4-bolt flange with ISO / SAE through-drive auxiliary adapters.
Target Brand Interchangeability Matrix
The HENGYUHANG HYH10VSO Series 32 delivers verified 1:1 drop-in replacement across the complete Bosch Rexroth A10VSO Series 32 portfolio:
Bosch Rexroth A10VSO45 Series 32 → HYH10VSO-045/32 (all control, shaft, and port variants)
Bosch Rexroth A10VSO71 Series 32 → HYH10VSO-071/32 (all control, shaft, and port variants)
Bosch Rexroth A10VSO100 Series 32 → HYH10VSO-100/32 (all control, shaft, and port variants)
Bosch Rexroth A10VSO140 Series 32 → HYH10VSO-140/32 (all control, shaft, and port variants)
Bosch Rexroth A10VSO180 Series 32 → HYH10VSO-180/32 (all control, shaft, and port variants)
Brand Replacement
The HENGYUHANG HYH10VSO Series 32 is specifically manufactured as a high-precision 1:1 drop-in replacement for the Bosch Rexroth A10VSO Series 32 axial piston variable displacement pump family. Every pump is dynamically calibrated on our automated computerized test benches to mirror Rexroth factory performance curves across control hysteresis, pressure response time (<50 ms), flow repeatability, and volumetric efficiency (>92%). Utilizing standardized ISO 3019-2 4-bolt mounting pilots (Ø125, Ø160, Ø180 mm), metric-threaded SAE flange ports, and matching drive shaft splines (ANSI B92.1a / DIN 6885), HYH10VSO Series 32 units mount directly into existing machinery without bell-housing modifications, piping rework, or control re-tuning. Equipment builders, distributors, and maintenance facilities benefit from seamless interchangeability, shorter delivery lead times, and lower total ownership costs.
Applications
Plastic & Rubber Machinery: Servo and proportional hydraulic power units for injection molding machines, extrusion presses, and blow molding systems.
Metal Forming & Stamping Presses: Deep-drawing hydraulic presses, CNC press brakes, shearing machines, and punching lines requiring rapid pressure build-up and stable holding.
Machine Tools & Automation: Centralized hydraulic power packs for CNC machining centers, automated transfer fixtures, and clamping systems.
Mining & Metallurgy: Steel mill auxiliary circuits, continuous casting equipment, furnace tilt drives, and underground mining support systems.
Marine & Offshore Deck Machinery: Mooring winches, anchor windlasses, crane slew drives, and steering gear systems requiring heavy-duty 280/350 bar continuous power.
Package & Shipping
| Packaging Construction | Heavy-duty export fumigation-free wooden case with custom-molded shock-absorbing internal positioning cradles |
|---|---|
| Corrosion Protection | Internal factory testing oil preservation, external anti-rust oil coating, and vapor corrosion inhibitor (VCI) sealed plastic barrier |
| Port & Shaft Protection | Heavy-duty threaded steel/plastic port blanking plugs and precision protective plastic shaft sleeves |
| Package Dimensions | Approx. 450 × 320 × 300 mm (HYH10VSO 45/71) up to 680 × 420 × 400 mm (HYH10VSO 140/180) |
| Gross Weight | Approx. 38 kg (HYH10VSO 45) up to 98 kg (HYH10VSO 140/180) |
| Standard Lead Time | 3 – 5 business days for stocked configurations; 15 – 25 business days for volume OEM production batches |
| Global Shipping Options | Air express (DHL / FedEx / UPS / TNT) for urgent maintenance downtime; Ocean FCL/LCL or Air cargo for commercial orders |
| Custom Documentation | Mill test certificates, factory dynamic performance test graphs, and customized private-label nameplates supported |
Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence: Manufactured in our state-of-the-art production facility equipped with high-precision 4-axis and 5-axis CNC machining centers, automated gear hobbing, and CNC gear tooth profile grinding (Ra < 0.2 μm) to ensure superior surface finish, ultra-tight internal clearances, and maximum volumetric efficiency.
100% Full-Cycle Multi-Parameter Factory Inspection: Every single pump undergoes computerized testing before packaging, verifying flow rate at rated speed, volumetric efficiency (>91–93%), mechanical efficiency, continuous and peak pressure hold, internal bypass, and noise spectrum. Zero untested units leave the factory.
Seamless 1:1 OEM Drop-In Interchangeability: Dimensionally matched to European, SAE, and DIN standards, providing 1:1 direct mechanical interchangeability across premier global brands (Bosch Rexroth, Parker, Danfoss, etc.) with zero mounting modifications required.
Flexible Engineering Customization & Rapid Prototyping: Supported by a senior fluid power engineering team, offering custom displacement combinations, specialized shaft tapers, splines, integrated priority or relief valves, and non-standard port orientations with rapid sample prototyping and low MOQ requirements.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: Extensive raw material stock of high-grade ductile cast iron castings, alloy steel gear sets, and bearing assemblies enables rapid assembly and 48–72 hour dispatch for emergency breakdown replacements, supported by complete export logistics.
12-Month Comprehensive Warranty & Lifetime Technical Support: All pumps are backed by a comprehensive 12-month manufacturer warranty against defects in materials and workmanship, supplemented by 24/7 engineering consultation, CAD drawing verification, and lifecycle technical assistance.
HENGYUHANG Axial Piston Variable Displacement Pump HYH10VSO Series 32 (Axialkolben-Verstellpumpe HYH10VSO Baureihe 32 Series, 45.00~180.00 cm³/rev) is a heavy-duty, high-performance swashplate-design axial piston variable displacement pump engineered specifically for open-circuit hydrostatic drive systems in stationary industrial power units, heavy metallurgy, plastics machinery, and severe-duty mobile machinery. Designed as a 100% direct dimensional, hydraulic, and functional custom drop-in replacement for the global industry benchmark Bosch Rexroth A10VSO Baureihe 32 (A10VSO Series 32: A10VSO 045, A10VSO 071, A10VSO 100, A10VSO 140, A10VSO 180), the HYH10VSO Series 32 features an optimized swashplate rotary group capable of stepless flow variation directly proportional to drive speed and displacement angle. Engineered for continuous nominal working pressures (p_nom) of 280 bar (4,060 psi / 28 MPa) and maximum peak operating pressures (p_max) up to 350 bar (5,076 psi / 35 MPa), this pump line spans 5 standardized displacement sizes from 45.0 to 180.0 cm³/rev (2.75 to 10.98 in³/rev), delivering flow rates up to 324 L/min in standard electric-motor driven version E (1800 rpm) and up to 308 L/min in high-speed rotary group version S (up to 3000 rpm). Built with robust ISO 3019-2 4-hole European metric mounting flanges (centering pilot Ø125 mm to Ø180 mm), heavy-duty drive shafts including ANSI B92.1a involute splines (1 in to 1 3/4 in) and DIN 6885 keyed shafts (Ø25 mm to Ø45 mm), SAE J518 / ISO 6162 flange fluid ports with optional pulse damping (PCV), 100% full-torque universal through-drive capability (U00/UBx), and comprehensive hydro-mechanical/electro-proportional control options (DG, DR, DRF, DRS, DRG, ED72, ER72, and LA... power controllers), the HYH10VSO Series 32 guarantees seamless, drop-in field substitution without hydraulic piping alterations or mounting bracket modifications.
| Applications
The HYH10VSO Baureihe 32 Series swashplate axial piston variable displacement pump is engineered for demanding industrial stationary plants and high-duty cycle mobile machinery requiring continuous high pressure, ultra-low pulsation, and versatile through-drive multi-pump capability:
Heavy Hydraulic Presses and Metal Forming Machinery: Supplies continuous 280 bar high-pressure fluid power to main stamping rams, blank holders, and hydraulic bending presses; withstands rapid cyclic pressure surges up to 350 bar with maximum rate of pressure change up to 16,000 bar/s.
Plastic Injection Molding and Blow Molding Machines: Operates with proportional pressure and flow controls (ED72/ER72) or load-sensing controllers (DRF/DRS) to optimize energy efficiency during clamping, injection, and plasticizing cycles.
Die Casting Machines and Foundry Equipment: Provides instantaneous, high-dynamic accumulator charging and injection cylinder acceleration with minimal pressure drop and rapid swashplate response.
Steel Mills, Rolling Mills, and Metallurgy Plants: Withstands severe environmental temperatures and continuous duty operation; compatible with mineral oil HLP and water-containing fire-resistant fluids (HFC, HFB, HFA, HFDU).
Marine Deck Machinery and Offshore Handling Winches: Direct-driven by electric motors or auxiliary combustion engines; powers anchor windlasses, high-torque mooring winches, cargo crane slewing drives, and hydraulic power packs (HPUs).
Mining Excavators, Tunnel Boring, and Drilling Rigs: Powers auxiliary open-circuit functions; features full 100% through-drive capacity to mount secondary gear pumps or auxiliary piston pumps in tandem combinations.
| Key Specifications Overview
| Parameter | Engineering Specification (Series 32 Industrial Standard) |
|---|---|
| Series Architecture | Swashplate Design Variable Axial Piston Rotary Group for Open Circuit Hydrostatic Drives (Series 32 / Baureihe 32) |
| Standard Displacement Sizes (HYH10VSO) | 5 Standard Frame Sizes: HYH10VSO 045, HYH10VSO 071, HYH10VSO 100, HYH10VSO 140, HYH10VSO 180 cm³/rev |
| Nominal Continuous Pressure (p_nom) | 280 bar (4,060 psi / 28 MPa) continuous design working pressure at working port B |
| Maximum Peak Operating Pressure (p_max) | 350 bar (5,076 psi / 35 MPa) absolute maximum peak pressure (single period max 2.5 ms, cumulative 300 h) |
| Minimum Pressure at Working Port B (p_B abs) | 10 bar (145 psi) absolute minimum pressure required on the high-pressure side to prevent swashplate shoe damage |
| Maximum Rate of Pressure Change (RA_max) | 16,000 bar/s (232,000 psi/s) maximum permissible rate of pressure rise and reduction across operating range |
| Suction Port Pressure Limits (p_S) | Minimum inlet pressure: 0.8 bar (standard) / 1.0 bar (high-speed) absolute; Maximum inlet pressure: 10.0 bar (145 psi) absolute |
| Case Drain Pressure Limits (p_L max) | Maximum 2.0 bar (30 psi) absolute at ports L1 / L2 (max 0.5 bar above inlet pressure; external drain line required) |
| Rotational Speed Range (Version E Standard) | Nominal speed n_nom = 1800 rpm across all sizes (flow: 81 ~ 324 L/min @ 1800 rpm; 67.5 ~ 270 L/min @ 1500 rpm) |
| Rotational Speed Range (Version S High-Speed) | Nominal speed n_nom: 3000 rpm (HYH10VSO 045), 2550 rpm (HYH10VSO 071), 2300 rpm (HYH10VSO 100), 2200 rpm (HYH10VSO 140) |
| Drive Power Consumption @ 280 bar (Version E) | 38.0 kW (HYH10VSO 045), 59.7 kW (HYH10VSO 071), 84.0 kW (HYH10VSO 100), 118.0 kW (HYH10VSO 140), 151.0 kW (HYH10VSO 180) @ 1800 rpm |
| Drive Torque Output @ 280 bar (Δp = 280 bar) | 200 Nm (HYH10VSO 045), 317 Nm (HYH10VSO 071), 446 Nm (HYH10VSO 100), 624 Nm (HYH10VSO 140), 802 Nm (HYH10VSO 180) |
| Mounting Flange Standard | ISO 3019-2 4-hole metric flange (Ø125-4 for HYH10VSO 045; Ø160-4 for HYH10VSO 071; Ø180-4 for HYH10VSO 100, 140, 180) |
| Drive Shaft Configurations | Splined shaft ISO 3019-1 (ANSI B92.1a Code S standard / Code R reinforced) or parallel keyed shaft DIN 6885 (Code P) |
| Through-Drive Capability | 100% full-torque universal through-drive (Port Plates 22 & 32 with Code Uxx; Port Plate 12 with Code Kxx) for multi-pump combinations |
| Hydraulic Service Port Standards | SAE J518 / ISO 6162 flange ports with metric DIN 13 fastening threads (Standard Code 61 or High-Pressure Code 62) |
| Pulsation Damping Technology (PCV) | Optional Port Plate 32 with integrated Pre-Compression Volume (PCV) for active fluid pulsation and structural noise reduction |
| Modular Control Options | DG (Two-point), DR (Pressure), DRF/DRS (Load-Sensing), DRG (Remote Pressure), ED72/ER72 (Electro-Proportional), LA... (Power) |
| Sealing Material & Fluid Temperature Range | Standard FKM (fluorocarbon rubber / Viton) seals: -25°C to +115°C; Optional NBR (nitrile rubber) seals: -40°C to +90°C |
| Hydraulic Fluid Compatibility | Mineral oil HLP DIN 51524; Environmentally acceptable (HEES/HEPG); Fire-resistant fluids (HFA, HFB, HFC, HFDR, HFDU) |
| Fluid Cleanliness Standard | ISO 4406 Class 20/18/15 minimum (Class 19/17/14 required when fluid viscosity drops below 10 mm²/s) |
| Technical Performance Matrix Across Available Sizes
| Model Code | Displacement cm³/rev (in³/rev) | Operating Pressure (bar / psi) | Speed Range (rpm) | Delivery Flow (L/min) | Drive Power @ 280 bar (kW) | Torque @ 280 bar (Nm) | Pump Mass (kg, approx) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal (p_nom) | Peak (p_max) | Version E (Nominal) | Version S (High-Speed) | @ 1800 rpm | @ 1500 rpm | @ 1800 rpm | @ 1500 rpm | ||||
| HYH10VSO 045 | 45.0 (2.75) | 280 / 4,060 | 350 / 5,076 | 1800 | 3000 | 81.0 | 67.5 | 38.0 | 31.0 | 200 | 32.6 |
| HYH10VSO 071 | 71.0 (4.33) | 280 / 4,060 | 350 / 5,076 | 1800 | 2550 | 128.0 | 106.7 | 59.7 | 50.0 | 317 | 51.8 |
| HYH10VSO 100 | 100.0 (6.10) | 280 / 4,060 | 350 / 5,076 | 1800 | 2300 | 180.0 | 150.0 | 84.0 | 70.0 | 446 | 76.0 |
| HYH10VSO 140 | 140.0 (8.54) | 280 / 4,060 | 350 / 5,076 | 1800 | 2200 | 252.0 | 210.0 | 118.0 | 98.0 | 624 | 90.2 |
| HYH10VSO 180 | 180.0 (10.98) | 280 / 4,060 | 350 / 5,076 | 1800 | – | 324.0 | 270.0 | 151.0 | 125.0 | 802 | 89.4 |
| Modular Control Devices and Functional Principles
| Controller Code | Control Mechanism | Setting Range & Parameters | Functional Operation & Dynamic Benefit |
|---|---|---|---|
| DR | Hydraulic Pressure Controller (Constant Pressure Cut-Off) | Setting range: 50 ~ 280 bar (725 ~ 4,060 psi); Standard setting: 280 bar | Maintains constant system pressure by destroking the pump swashplate once preset pressure is reached. Prevents system overheating and relief valve blowing in clamping and dwell cycles. |
| DRF / DRS | Load-Sensing Flow & Pressure Controller (Differential Pressure Control) | Pressure cut-off up to 280 bar; Differential pressure Δp: 14 ~ 25 bar; Standard setting: 14 bar | Regulates pump displacement to match consumer flow demand across an external proportional orifice. DRF features an open X-T line; DRS features a plugged X-T line with an internal flushing function. |
| DRG | Remotely Controlled Pressure Relief Valve Controller | Differential pressure Δp: 14 ~ 25 bar (200 ~ 360 psi); Standard setting: 20 bar (290 psi) | Allows remote piloting of system pressure cut-off via an external manual or electro-proportional relief valve piped to port X. Control fluid quantity at port X is approx. 1.5 L/min at 20 bar Δp. |
| ED72 / ER72 | Electro-Proportional Pressure Controller (24 V DC Integrated Proportional Valve) | Continuous electronic setting from 20 bar up to 280 bar; Control current: 100 ~ 1200 mA | ED72 provides negative control characteristics (maximum pressure at zero current, failsafe); ER72 provides positive control characteristics (pressure rises proportionally with current). |
| DG | Direct-Operated Two-Point Hydraulic Switching Controller | Switching pressure: min 50 bar up to 280 bar; Port X connecting thread: G 1/4 in | Enables two-point stroke switching between maximum displacement Vg_max and minimum displacement Vg_min via direct pilot pressure application at port X. |
| LA5D ~ LA9D | Hyperbolic Power Controller with Integrated Pressure Cut-Off | Beginning of control: LA5D (to 50 bar), LA6D (51~90 bar), LA7D (91~160 bar), LA8D (161~240 bar), LA9D (>240 bar) | Limits hydraulic input power according to a hyperbolic p × Vg characteristic curve, protecting prime electric motors or diesel engines from overloading while maximizing flow at lower pressures. |
| Mounting Flange, Shaft and Port Specifications
| Model Size | Mounting Flange (ISO 3019-2 4-Hole) | Drive Shaft (ISO 3019-1 / DIN 6885) | Hydraulic Service Ports (SAE J518 / ISO 6162) |
|---|---|---|---|
| HYH10VSO 045 | ISO 3019-2 Ø125-4; Centering pilot Ø125 mm (-0.063 mm), depth 9.0 mm; 4 × Ø14 mm through holes | Splined S: 1 in 15T 16/32DP (319 Nm max); Splined R: 1 in (400 Nm); Keyed P: DIN 6885 Ø25 mm (200 Nm) | Working B: SAE 1 in Code 61 (M10 × 1.5, 350 bar max); Suction S: SAE 1 1/2 in Code 61 (M12 × 1.75); Drain L/L1: M22 × 1.5 |
| HYH10VSO 071 | ISO 3019-2 Ø160-4; Centering pilot Ø160 mm (-0.063 mm), depth 9.0 mm; 180 × 180 mm centers, 4 × Ø18 mm holes | Splined S: 1 1/4 in 14T 12/24DP (626 Nm max); Splined R: 1 1/4 in (644 Nm); Keyed P: DIN 6885 Ø32 mm (439 Nm) | Working B: SAE 1 in Code 61 (M10 × 1.5, 350 bar max); Suction S: SAE 2 in Code 61 (M12 × 1.75); Drain L/L1: M22 × 1.5 |
| HYH10VSO 100 | ISO 3019-2 Ø180-4; Centering pilot Ø180 mm (-0.063 mm), depth 9.0 mm; 200 × 200 mm centers, 4 × Ø18 mm holes | Splined S: 1 1/2 in 17T 12/24DP (1104 Nm max); Keyed P: DIN 6885 Ø40 mm (857 Nm max) | Working B: SAE 1 1/4 in Code 62 (M14 × 2, 350 bar max); Suction S: SAE 2 1/2 in Code 61 (M12 × 1.75); Drain L/L1: M33 × 2 |
| HYH10VSO 140 | ISO 3019-2 Ø180-4; Centering pilot Ø180 mm (-0.063 mm), depth 9.0 mm; 200 × 200 mm centers, 4 × Ø18 mm holes | Splined S: 1 3/4 in 13T 8/16DP (1620 Nm max); Keyed P: DIN 6885 Ø45 mm (1206 Nm max) | Working B: SAE 1 1/4 in Code 62 (M14 × 2, 350 bar max); Suction S: SAE 2 1/2 in Code 61 (M12 × 1.75); Drain L/L1: M33 × 2 |
| HYH10VSO 180 | ISO 3019-2 Ø180-4; Centering pilot Ø180 mm (-0.063 mm), depth 9.0 mm; 200 × 200 mm centers, 4 × Ø18 mm holes | Splined S: 1 3/4 in 13T 8/16DP (1834 Nm max); Keyed P: DIN 6885 Ø45 mm (1243 Nm max) | Working B: SAE 1 1/4 in Code 62 (M14 × 2, 350 bar max); Suction S: SAE 3 in Code 61 (M16 × 2); Drain L/L1: M33 × 2 |
| Direct Interchangeability and OEM Replacement Matrix (Rexroth A10VSO Baureihe 32)
| Hengyuhang Series | OEM Target Model | OEM Part Reference Code | Interchangeability and Drop-In Compliance |
|---|---|---|---|
| HYH10VSO 045 | Bosch Rexroth A10VSO 045 | A10VSO 045 / 32R-VPB22U00 | 100% direct mechanical and hydraulic drop-in replacement; identical ISO 3019-2 Ø125-4 flange, ANSI B92.1a 1 in splined shaft, SAE 1 in port B, and 280 bar nominal rating. |
| HYH10VSO 071 | Bosch Rexroth A10VSO 071 | A10VSO 071 / 32R-VPB22U00 | Direct bolt-on replacement for heavy industrial HPUs; identical ISO Ø160-4 flange, 1 1/4 in splined shaft S, SAE 2 in suction port, and 51.8 kg unit mass. |
| HYH10VSO 100 | Bosch Rexroth A10VSO 100 | A10VSO 100 / 32R-VPB22U00 | Direct replacement with ISO Ø180-4 flange, 1 1/2 in splined shaft, SAE 1 1/4 in Code 62 high-pressure working port, and 100% full-torque through-drive capability. |
| HYH10VSO 140 | Bosch Rexroth A10VSO 140 | A10VSO 140 / 32R-VPB22U00 | Full drop-in replacement for high-flow hydraulic presses; identical ISO Ø180-4 flange, 1 3/4 in 13T splined shaft, and 252 L/min flow rating at 1800 rpm. |
| HYH10VSO 180 | Bosch Rexroth A10VSO 180 | A10VSO 180 / 32R-VPB22U00 | Maximum-capacity 180 cm³/rev replacement; features ISO Ø180-4 mounting flange, SAE 3 in suction line port, and continuous 802 Nm torque capability at 280 bar. |
| HYH10VSO Through-Drive | Bosch Rexroth Through-Drive Modules | UB2, UB3, UB4, UB5, UB6, UB7 | 100% interchangeable universal through-drive rear adapters for direct mounting of secondary A10VSO, gear pumps, or radial piston pumps. |
| Technical Performance Matrix Across Available Sizes
| Model Code | Displacement cm³/rev (in³/rev) | Operating Pressure (bar / psi) | Speed Range (rpm) | Delivery Flow (L/min) | Drive Power @ 280 bar (kW) | Torque @ 280 bar (Nm) | Pump Mass (kg, approx) | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal (p_nom) | Peak (p_max) | Version E (Nominal) | Version S (High-Speed) | @ 1800 rpm | @ 1500 rpm | @ 1800 rpm | @ 1500 rpm | ||||
| HYH10VSO 045 | 45.0 (2.75) | 280 / 4,060 | 350 / 5,076 | 1800 | 3000 | 81.0 | 67.5 | 38.0 | 31.0 | 200 | 32.6 |
| HYH10VSO 071 | 71.0 (4.33) | 280 / 4,060 | 350 / 5,076 | 1800 | 2550 | 128.0 | 106.7 | 59.7 | 50.0 | 317 | 51.8 |
| HYH10VSO 100 | 100.0 (6.10) | 280 / 4,060 | 350 / 5,076 | 1800 | 2300 | 180.0 | 150.0 | 84.0 | 70.0 | 446 | 76.0 |
| HYH10VSO 140 | 140.0 (8.54) | 280 / 4,060 | 350 / 5,076 | 1800 | 2200 | 252.0 | 210.0 | 118.0 | 98.0 | 624 | 90.2 |
| HYH10VSO 180 | 180.0 (10.98) | 280 / 4,060 | 350 / 5,076 | 1800 | – | 324.0 | 270.0 | 151.0 | 125.0 | 802 | 89.4 |
| Hengyuhang Series | OEM Target Model | OEM Part Reference Code | Interchangeability and Drop-In Compliance |
|---|---|---|---|
| HYH10VSO 045 | Bosch Rexroth A10VSO 045 | A10VSO 045 / 32R-VPB22U00 | 100% direct mechanical and hydraulic drop-in replacement; identical ISO 3019-2 Ø125-4 flange, ANSI B92.1a 1 in splined shaft, SAE 1 in port B, and 280 bar nominal rating. |
| HYH10VSO 071 | Bosch Rexroth A10VSO 071 | A10VSO 071 / 32R-VPB22U00 | Direct bolt-on replacement for heavy industrial HPUs; identical ISO Ø160-4 flange, 1 1/4 in splined shaft S, SAE 2 in suction port, and 51.8 kg unit mass. |
| HYH10VSO 100 | Bosch Rexroth A10VSO 100 | A10VSO 100 / 32R-VPB22U00 | Direct replacement with ISO Ø180-4 flange, 1 1/2 in splined shaft, SAE 1 1/4 in Code 62 high-pressure working port, and 100% full-torque through-drive capability. |
| HYH10VSO 140 | Bosch Rexroth A10VSO 140 | A10VSO 140 / 32R-VPB22U00 | Full drop-in replacement for high-flow hydraulic presses; identical ISO Ø180-4 flange, 1 3/4 in 13T splined shaft, and 252 L/min flow rating at 1800 rpm. |
| HYH10VSO 180 | Bosch Rexroth A10VSO 180 | A10VSO 180 / 32R-VPB22U00 | Maximum-capacity 180 cm³/rev replacement; features ISO Ø180-4 mounting flange, SAE 3 in suction line port, and continuous 802 Nm torque capability at 280 bar. |
| HYH10VSO Through-Drive | Bosch Rexroth Through-Drive Modules | UB2, UB3, UB4, UB5, UB6, UB7 | 100% interchangeable universal through-drive rear adapters for direct mounting of secondary A10VSO, gear pumps, or radial piston pumps. |
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