Piston pump
HENGYUHANG Axial Piston Variable Double Pump HYH20VO Series 10
HENGYUHANG HYH20VO Series 10 is a heavy-duty back-to-back swashplate axial piston variable double pump for open-circuit hydrostatic drives, integrating two proven rotary groups into a single high-power housing with continuous closed-loop control, external power adjustment during operation, full-torque through-drive compounding, and seamless 1:1 drop-in interchangeability with Bosch Rexroth A20VO, A20VNO, and A20VLO Series 10 pumps.
| Applications
Engineered for dual-circuit open-loop hydraulic systems in heavy mobile construction, mining, and industrial machinery, including crawler excavators (30T–200T dual main pump systems), hydraulic demolition shears, heavy mobile harbor cranes, rotary drilling rigs, underground mining loaders, large scrap metal balers, and multi-cylinder industrial extrusion presses requiring independent dual-flow high-pressure delivery and tandem through-drive capability.
| Key Technical Specifications
Product Model: HYH20VO Series 10 (Dual Pump Sizes: 2×60, 2×72, 2×85, 2×93.8, 2×192.7, 2×260, 2×520 cm³/rev)
Brand Replacement: Bosch Rexroth A20VO, A20VNO, A20VLO Series 10 (Sizes 60, 72, 85, 95, 190, 260, 520), OEM or as requested.
Displacement: 2×60.0 / 2×72.0 / 2×85.0 / 2×93.8 / 2×192.7 / 2×260.0 / 2×520.0 cm³/rev (total displacement up to 1,040 cm³/rev)
Rotation Direction: Clockwise (R) or Counter-clockwise (L), viewed facing drive shaft
Speed Range: Rated input speed n nom 1,450–2,700 rpm (2×190 at 2,500 rpm with charge pump, 2×260 at 2,300 rpm, 2×520 at 1,450 rpm; n min = 500 rpm)
Peak Pressure: Sizes 60/72: p nom = 250 bar / p max = 315 bar; Size 85: p nom = 210 bar / p max = 250 bar; Sizes 95/190/260/520: p nom = 350 bar / p max = 400 bar
- Description
- Tecspecs
- Brand & Reference
- Download HENGYUHANG Axial Piston Variable Double Pump HYH20VO PDF
- Send an Inquiry
| Overview of HENGYUHANG HYH20VO Series 10 Hydraulic Pumps
The HENGYUHANG HYH20VO Series 10 is an ultra-heavy-duty swashplate axial piston variable double pump engineered specifically for dual-circuit open-loop hydrostatic transmission systems. Featuring a compact back-to-back arrangement of two identical, independently or synchronously controlled variable displacement rotary groups on a common drive line, this series serves as a direct 1:1 functional, dimensional, and mechanical drop-in replacement for the entire Bosch Rexroth A20VO, A20VNO, and A20VLO Series 10 family.
The HYH20VO family integrates proven, field-tested components from premier single-pump series:
Sizes 60 and 72: Based on proven A10VO Series 5x architecture (pnom = 250 bar, pmax = 315 bar).
Size 85 (HYH20VNO): Based on low-pressure A10VNO Series 5x components (pnom = 210 bar, pmax = 250 bar).
Sizes 95, 190, and 260: Based on ultra-heavy-duty A11VO / A11VLO Series 1x technology (pnom = 350 bar, pmax = 400 bar), with internal centrifugal charge pumps available on sizes 190 and 260 (HYH20VLO) for elevated diesel engine drive speeds up to 2,500 rpm.
Size 520: Based on heavy industrial A4VSO Series 30 components (pnom = 350 bar, pmax = 400 bar), delivering massive output flows exceeding 2×754 L/min.
Operating fluid delivery is steplessly variable from full rated displacement down to zero stroke. With external power adjustments executable while the prime mover is operating, full-torque auxiliary through-drive mounting capability for tertiary gear or piston pumps, and a complete portfolio of cross-sensing hyperbolic power limiters, load-sensing controls, and digital electrohydraulic regulators, the HYH20VO delivers premier hydraulic power density and reliability for the most demanding mining excavators, mobile cranes, and heavy industrial presses.
| Dimension of HENGYUHANG HYH20VO Series 10 Hydraulic Pumps
| Mechanical Installation Interface Specifications
| Frame Size (HYH20VO) | Mounting Flange Standard | Drive Shaft Type & Dimensions |
|---|---|---|
| HYH20VO60 | ISO 3019-1 4-Hole SAE 127-4 (C) Spigot Ø127.0 mm | S: Involute Spline ISO 3019-1 1 1/4 in 14T 12/24DP |
| HYH20VO72 | ISO 3019-1 4-Hole SAE 127-4 (C) Spigot Ø127.0 mm | S: Involute Spline ISO 3019-1 1 1/4 in 14T 12/24DP |
| HYH20VNO85 | ISO 3019-1 4-Hole SAE 127-4 (C) Spigot Ø127.0 mm | S: Involute Spline ISO 3019-1 1 1/4 in 14T 12/24DP |
| HYH20VO95 | ISO 3019-1 4-Hole SAE 152-4 (D) / Opt. SAE J617 No. 3 | Z: DIN 5480 W45×2×21×9g; S: ANSI 1 3/4 in 13T 8/16DP |
| HYH20VLO190 | ISO 3019-1 4-Hole SAE 165-4 (E) / Opt. SAE J617 No. 3 | Z: DIN 5480 W50×2×24×9g; T: ANSI 2 in 15T 8/16DP |
| HYH20VLO260 | ISO 3019-1 4-Hole SAE 165-4 (E) | Z: DIN 5480 W60×2×28×9g; T: ANSI 2 1/4 in 17T 8/16DP |
| HYH20VO520 | Based on ISO 3019-2 8-Hole Flange (Spigot Ø315 mm) | Z: DIN 5480 W80×3×25×9g |
| Frame Size (HYH20VO) | Two Working Pressure Ports (B1 & B2 / A & B) | Common Suction Port S (ISO 6162-1 / SAE 3000 psi) | Case Drain Ports (L1–L4 / T1–T2) | Air Bleed & Gauge Ports |
|---|---|---|---|---|
| HYH20VO60 | Two Port B: SAE 1 in (M10×1.5, 17 deep; 315 bar) | 2 1/2 in (M12×1.75, 20 deep; max 5 bar) | L1–L4: 7/8-14 UNF-2B (13 deep; max 2 bar) | Integrated via case drain ports |
| HYH20VO72 | Two Port B: SAE 1 in (M10×1.5, 17 deep; 315 bar) | 2 1/2 in (M12×1.75, 20 deep; max 5 bar) | L1–L4: 7/8-14 UNF-2B (13 deep; max 2 bar) | Integrated via case drain ports |
| HYH20VNO85 | Two Port B: SAE 1 in (M10×1.5, 17 deep; 250 bar) | 2 1/2 in (M12×1.75, 20 deep; max 5 bar) | L1–L4: 7/8-14 UNF-2B (13 deep; max 2 bar) | Integrated via case drain ports |
| HYH20VO95 | Ports A & B: SAE 1 in (M12×1.75, 17 deep; 400 bar) | 3 1/2 in (M16×2, 24 deep; max 30 bar) | T1, T2: M26×1.5 (16 deep; max 10 bar) | R: M27×2 (16 deep); M1, MA, MB: M12×1.5 |
| HYH20VLO190 | Ports A & B: SAE 1 1/2 in (M16×2, 21 deep; 400 bar) | 5 in (M16×2, 23 deep; max 30 bar) | T1, T2: M33×2 (18 deep; max 10 bar) | R: M33×2 (16 deep); M1, MA, MB: M12×1.5 |
| HYH20VLO260 | Ports A & B: SAE 1 1/2 in (M16×2, 21 deep; 400 bar) | 5 in (M16×2, 23 deep; max 30 bar) | T1, T2: M33×2 (18 deep; max 10 bar) | R: M33×2 (16 deep); M1, MA, MB: M12×1.5 |
| HYH20VO520 | Ports B1–B3: SAE 2 in (M20×2.5, 24 deep; 400 bar) | 5 in (M16×2, 24 deep; max 30 bar) | T1, T2: M48×2 (22 deep; max 5 bar) | K1–K4: M48×2; MB1–MB4: M18×1.5 |
| Notes on Interface Features
Common Suction Port: Single enlarged central suction port S feeds both rotary groups simultaneously, streamlining inlet suction piping.
Port Arrangement Code 24: Standard lateral opposite configuration featuring two high-pressure ports (one per circuit) on opposite sides with metric DIN 13 fastening threads.
Port Arrangement Code 26: For size 520, two lateral opposite high-pressure ports with port S offset by 90°.
| Pump Installation Specifications
| Complete Ordering Code Structure
HYH20V−[Variant]−O−[Size]−[Control]/10 [Rotation]−[Seal][Shaft][Flange][Ports][Through Drive]
| Position | Code Segment | Available Designations & Options | Technical Description & Functional Purpose |
|---|---|---|---|
| 01 | Axial Piston Unit | HYH20V / A20V | Swashplate design, variable double pump in back-to-back tandem arrangement |
| 02 | Additional Function | Blank / N / L | Blank: Standard pressure area without charge pump (Sizes 60, 72, 95, 520) N: Low-pressure version without charge pump (Size 85) L: High-speed version with integrated centrifugal charge pump (Sizes 190, 260) |
| 03 | Operating Mode | O | Double pump, open circuit operation |
| 04 | Geometric Frame Size | 60, 72, 85, 95, 190, 260, 520 | Geometric displacement per rotary group in cm³/rev |
| 05 | Control Devices | DRG / DFR LR / LRDS / LRDH1 / EP2D LR3N / LR2DN / LR3DN / LR3GN / HS5 | DRG / DFR: Pressure controller with remote control (DRG) or load-sensing flow controller (DFR) for sizes 60, 72, 85 LR / LRDS / LRDH1 / EP2D: Power controller, load sensing, stroke limiters, or electrohydraulic proportional controls for sizes 95, 190, 260 LR3N / LR2DN / LR3DN / LR3GN / HS5: High-pressure power controller variants and electrohydraulic pilot controls for size 520 |
| 06 | Series | 10 | Series 1, Index 0 |
| 07 | Direction of Rotation | R, L | Clockwise (R) or Counter-clockwise (L), viewed facing drive shaft |
| 08 | Sealing Material | N, V | N: NBR nitrile rubber with FKM shaft seal ring (Sizes 95, 190, 260); V: Full FKM fluorocarbon rubber seals (All sizes) |
| 09 | Drive Shaft Type | S, Z, T | S: ANSI B92.1a / ISO 3019-1 splined shaft (Sizes 60, 72, 85, 95) Z: DIN 5480 splined shaft (Sizes 95, 190, 260, 520) T: Reinforced ANSI splined shaft for heavy tandem drive (Sizes 190, 260) |
| 10 | Mounting Flange | D, G, H | D: ISO 3019-1 4-hole flange (Sizes 60–260) G: SAE J617 No. 3 combustion engine flywheel housing mount (Sizes 95, 190) H: ISO 3019-2 8-hole heavy industrial flange (Size 520) |
| 11 | Working Line Ports | 24, 26 | 24: SAE flanges, two ports B laterally opposite and one port S (Sizes 60–260) 26: SAE flanges, two ports B laterally opposite and port S offset 90° (Size 520) |
| 12 | Through-Drive Flange | N00, K01, K02, K04, K07, K52, K68, K99 | N00: Without through drive; K99: Sealed with pressure cover (Size 520) K01: SAE A 82-2 (5/8" 9T); K52: SAE A 82-2 (3/4" 11T) K02: SAE B 101-2 (7/8" 13T); K04: SAE B 101-2 (1" 15T); K68: SAE B (7/8" 13T) K07: SAE C 127-2 (1 1/4" 14T) |
| Reading Your Replacement Code
| Rexroth OEM Model Code | HENGYUHANG Drop-In Code | Dual Displacement | Operating Pressure | Control Execution | Drive Shaft & Mounting |
|---|---|---|---|---|---|
| A20VO60DRG/10R-VSD24K01 | HYH20VO60DRG/10R-VSD24K01 | 2×60.0 cm³ | 250 bar nom / 315 bar peak | Remote Pressure Control (DRG) | ISO 1 1/4" Spline, SAE C 4-Bolt |
| A20VO72DFR/10R-VSD24K52 | HYH20VO72DFR/10R-VSD24K52 | 2×72.0 cm³ | 250 bar nom / 315 bar peak | Load-Sensing + Pressure (DFR) | ISO 1 1/4" Spline, SAE C 4-Bolt |
| A20VNO85DFR/10R-VSD24K68 | HYH20VNO85DFR/10R-VSD24K68 | 2×85.0 cm³ | 210 bar nom / 250 bar peak | Load-Sensing Control (DFR) | ISO 1 1/4" Spline, SAE C 4-Bolt |
| A20VO95LRDS/10R-NZD24K02 | HYH20VO95LRDS/10R-NZD24K02 | 2×93.8 cm³ | 350 bar nom / 400 bar peak | Power + LS + Cut-off (LRDS) | DIN 5480 W45 Spline, SAE D 4-Bolt |
| A20VLO190LRDH1/10R-NZD24K07 | HYH20VLO190LRDH1/10R-NZD24K07 | 2×192.7 cm³ | 350 bar nom / 400 bar peak | Power + Cut-off + Stroke Limiter | DIN 5480 W50 Spline, SAE E 4-Bolt |
| A20VLO260LRDS/10R-NZD24K07 | HYH20VLO260LRDS/10R-NZD24K07 | 2×260.0 cm³ | 350 bar nom / 400 bar peak | Power + LS + Cut-off (LRDS) | DIN 5480 W60 Spline, SAE E 4-Bolt |
| A20VO520LR3N/10R-VZH26K99 | HYH20VO520LR3N/10R-VZH26K99 | 2×520.0 cm³ | 350 bar nom / 400 bar peak | High-Pressure Power Control (LR3N) | DIN 5480 W80 Spline, ISO 8-Bolt Flange |
Technical Specifications of HENGYUHANG HYH20V(L)O Series (Dual Rotary Group Tandem)
4.1 Dual Rotary Group Performance Matrix (Data at port S, mineral fluid ρ=0.88 kg/L)
| Performance Parameter | Unit | HYH20VO60 | HYH20VO72 | HYH20VNO85 | HYH20VO95 | HYH20VLO190 | HYH20VLO260 | HYH20VO520 |
|---|---|---|---|---|---|---|---|---|
| Max Displacement per Rotary Group (Vgₘₐₓ) | cm³/rev | 60.0 | 72.0 | 85.0 | 93.8 | 192.7 | 260.0 | 520.0 |
| Total Combined Displacement (2×Vgₘₐₓ) | cm³/rev | 120.0 | 144.0 | 170.0 | 187.6 | 385.4 | 520.0 | 1,040.0 |
| Max Continuous Input Speed (nₙₒₘ at Vgₘₐₓ) | rpm | 2,700 | 2,600 | 2,700 | 2,350 | 2,500 | 2,300 | 1,450 |
| Limiting Input Speed with Boosted Inlet (nₘₐₓ) | rpm | 3,140 | 3,140 | 2,700 | 2,780 | 2,500 | 2,300 | 1,720 |
| Minimum Operating Speed (nₘᵢₙ) | rpm | 500 | 500 | 500 | 500 | 500 | 500 | 500 |
| Total Flow Output (qV at nₙₒₘ and Vgₘₐₓ) | L/min | 2×162 | 2×187 | 2×230 | 2×220 | 2×482 | 2×598 | 2×754 |
| Continuous Total Drive Power (P at nₙₒₘ and Δp) | kW | 135 (250 bar) | 154 (250 bar) | 160 (210 bar) | 257 (350 bar) | 562 (350 bar) | 698 (350 bar) | 880 (350 bar) |
| Total Drive Torque (M_max at 2×Vgₘₐₓ and Δp) | Nm | 477 (250 bar) | 572 (250 bar) | 568 (210 bar) | 1,045 (350 bar) | 2,147 (350 bar) | 2,897 (350 bar) | 5,793 (350 bar) |
| Rotary Stiffness of Drive Shaft Z (c) | kNm/rad | — | — | — | 199.6 | 346.2 | 686.5 | 1,136.0 |
| Rotary Stiffness of Drive Shaft S / T (c) | kNm/rad | 65.5 (S) | 65.5 (S) | 65.5 (S) | 173.7 (S) | 301.9 (T) | 567.1 (T) | — |
| Rotary Group Moment of Inertia (J_TW) | kg·m² | 0.0113 | 0.0113 | 0.0113 | 0.0346 | 0.1127 | 0.1773 | 0.6960 |
| Dry Weight without Through Drive (Approx.) | kg | 95 | 98 | 102 | 135 | 215 | 280 | 520 |
4.2 Operating Pressure Classification
| Frame Size Band | Nominal Continuous Pressure (pₙₒₘ) | Maximum Peak Pressure (pₘₐₓ) | Minimum High-Pressure Port (p_B / p_A) | Pressure Rise Rate (RAₘₐₓ) | Minimum Suction Pressure (p_S min) |
|---|---|---|---|---|---|
| Sizes 60 & 72 | 250 bar (3,600 psi) | 315 bar (4,550 psi) | 10 bar absolute | 16,000 bar/s | 0.8 bar absolute |
| Size 85 (HYH20VNO) | 210 bar (3,050 psi) | 250 bar (3,600 psi) | 10 bar absolute | 16,000 bar/s | 0.8 bar absolute |
| Sizes 95, 190, 260 | 350 bar (5,100 psi) | 400 bar (5,800 psi) | Diagram-based (≥10 bar) | 16,000 bar/s | 0.8 bar abs (Size 95) / Boosted (190/260) |
| Size 520 | 350 bar (5,100 psi) | 400 bar (5,800 psi) | 15 bar absolute | 16,000 bar/s | 0.8 bar absolute |
4.3 Hydraulic Fluid & Temperature Operational Limits
| Fluid Characteristic | Permissible Value | Operational Note |
|---|---|---|
| Recommended Fluid Media | Mineral oil (HLP to DIN 51524) | High-performance petroleum-based hydraulic fluid with anti-wear additives |
| Optimum Operating Viscosity (νₒₚₜ) | 16 to 36 mm²/s | Optimum balance of volumetric efficiency, response time, and bearing life |
| Continuous Operating Viscosity | 10 to 400 mm²/s | Full operational envelope with continuous temperature monitoring |
| Minimum Viscosity (νₘᵢₙ) | 7 to 10 mm²/s | Short-term limit (t≤3 min) at p≤0.3⋅pₙₒₘ, T_max=+85 ∘C (NBR) / +110 ∘C (FKM) |
| Maximum Viscosity at Cold Start (νₘₐₓ) | 1,600 mm²/s | Permissible at cold start (p≤50 bar, n≤0.5⋅nₙₒₘ, ϑ_St≥−25 ∘C, warm-up phase ≤3 min) |
| Permissible Fluid Temperature Range | −25 ∘C to +110 ∘C (−13 ∘F to +230 ∘F) | Full operating phase with standard FKM dynamic seals (NBR rated to +85 ∘C) |
| Fluid Cleanliness Class | ISO 4406 Class 20/18/15 | At elevated temperatures (>90 ∘C), maintain Class 19/17/14 minimum |
Product Advantages
High-Power Dual Rotary Tandem Architecture
Integrates two independently variable swashplate rotary groups into a rigid monobloc housing, delivering high flow and power density with a substantially shorter axial envelope than field-coupled single pumps.
External Power Adjustment on Live Machine
Mechanical and electronic power controller settings can be fine-tuned externally while the prime mover is operating under load, simplifying machine commissioning and optimizing fuel efficiency.
Proven Proven-Component Reliability
Built with battle-tested rotary group kinematics from A10VO, A10VNO, A11VO, and A4VSO designs, guaranteeing field reliability and component parts availability worldwide.
Integrated Centrifugal Charge Pump (HYH20VLO)
Sizes 190 and 260 feature an integrated impeller charge pump on the main shaft, enabling direct diesel engine operation up to 2,500 rpm without requiring external boost pressure.
Full Auxiliary Through-Drive Compounding
Equipped with rear SAE and ISO through-drive flange options (SAE A, B, C) capable of driving pilot gear pumps, steering pumps, or cooling fan pumps at full input torque.
Seamless 1:1 OEM Drop-In Interchangeability
Engineered down to the millimeter to match Bosch Rexroth A20VO, A20VNO, and A20VLO Series 10 mounting flanges, shaft splines, and port centers.
| Interchangeability & Cross Reference
6.1 Direct Replacement Matrix: Bosch Rexroth A20VO/VNO/VLO to HENGYUHANG HYH20VO
| OEM Model Code | Displacement | Operating Pressure | Design Basis | Mounting & Ports | HENGYUHANG 1:1 Replacement |
| A20VO60.../10 | 2×60 cm³/rev | 250 bar nom / 315 bar peak | A10VO S5x components | SAE C 4-Hole, SAE 1" Ports | HYH20VO60 |
| A20VO72.../10 | 2×72 cm³/rev | 250 bar nom / 315 bar peak | A10VO S5x components | SAE C 4-Hole, SAE 1" Ports | HYH20VO72 |
| A20VNO85.../10 | 2×85 cm³/rev | 210 bar nom / 250 bar peak | A10VNO S5x components | SAE C 4-Hole, SAE 1" Ports | HYH20VNO85 |
| A20VO95.../10 | 2×93.8 cm³/rev | 350 bar nom / 400 bar peak | A11VO S1x components | SAE D 4-Hole, SAE 1" Ports | HYH20VO95 |
| A20VLO190.../10 | 2×192.7 cm³/rev | 350 bar nom / 400 bar peak | A11VLO S1x (with Impeller) | SAE E 4-Hole, SAE 1 1/2" Ports | HYH20VLO190 |
| A20VLO260.../10 | 2×260 cm³/rev | 350 bar nom / 400 bar peak | A11VLO S1x (with Impeller) | SAE E 4-Hole, SAE 1 1/2" Ports | HYH20VLO260 |
| A20VO520.../10 | 2×520 cm³/rev | 350 bar nom / 400 bar peak | A4VSO S30 components | ISO 8-Hole, SAE 2" Ports | HYH20VO520 |
6.2 Modular Controller Functionality Mapping
| Primary Control Function | Sizes 60, 72, 85 Code | Sizes 95, 190, 260 Code | Size 520 Code | Operational Characteristic |
| Constant Pressure Limiter | DR / DRG | DR / DRG | — | Destrokes both pumps at preset pressure cut-off; remote pilot relief via port G |
| Load-Sensing Flow Control | DFR / DFR1 | DRS / DRSC | — | Regulates dual pump flow to maintain constant differential across main control valve orifices |
| Hyperbolic Power Limiter | — | LR / LRDS | LR3N / LR3DN | Limits total combined engine torque absorption across both pumps to prevent engine stall |
| Power + Stroke Limiting | — | LRDH1 / LRDH2 | — | Combines hyperbolic power limiting, pressure cut-off, and hydraulic displacement limiting |
| Electrohydraulic Pilot Control | — | EP2D / EP2 | HS5 | Digital proportional solenoid regulation with integrated pressure cut-off (24V DC) |
| Brand Replacement
Bosch Rexroth (Primary 1:1 direct interchangeability for A20VO, A20VNO, and A20VLO Series 10 variable double pumps)
Kawasaki (K3V112DT / K3V140DT / K5V200DT Series) and Uchida-Rexroth tandem excavator pump retrofits engineered upon request
Caterpillar and Komatsu dual main pump replacements with customized mounting flanges and shaft splines
| Applications
Heavy Mining & Earthmoving Crawler Excavators (30T–200T): Primary dual main hydraulic pump powering boom, arm, bucket, and dual independent travel tracks.
Hydraulic Demolition & Scrap Recyclers: Provides dedicated independent circuits for high-pressure shear crushing and fast boom manipulation.
Large Mobile & Harbor Lattice Boom Cranes: Dual independent high-flow supplies for heavy main hoisting drums, luffing cylinders, and continuous slewing.
Deep Rotary Drilling Rigs & Trench Cutters: Independent dual supplies for high-torque rotary drill heads and heavy pull-down / crowd cylinders.
Heavy Industrial Metal Extrusion Presses & Balers: Synchronous multi-cylinder main ram compression and high-speed auxiliary functions requiring up to 2×754 L/min at 350 bar continuous.
Marine Dredging & Offshore Crane Systems: Dual-circuit power units for heavy cutter-head drives and high-capacity winches.
| 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 |
| 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 HYH20VO double pump undergoes automated dual-circuit test-bench trials verifying volumetric efficiency (> 94%), continuous and peak pressure hold at 350/400 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, and SAE standards down to the millimeter, allowing immediate replacement of Bosch Rexroth A20VO, A20VNO, and A20VLO Series 10 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 controllers 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 Variable Double Pump HYH20VO Series 10 (Variable Swashplate Open-Circuit Hydraulic Double Pump, 2×60.00~2×520.00 cm³/rev) is a high-pressure, heavy-duty axial piston variable double pump incorporating two swashplate rotary groups arranged back-to-back in a common housing for high-performance open-circuit hydrostatic drive systems. Manufactured by Quanzhou Hengyuhang Power Technology Co., Ltd. as an engineered, direct-fit replacement line designed to match the benchmark performance, mounting dimensions, pressure ratings, and hydraulic characteristics of the Rexroth A20VO, A20VNO, and A20VLO Series 10 (RE 93100), the HYH20VO Series 10 consists of proven, field-tested components from heavy-duty variable displacement pump series including the HYH11VO (RE 92500), HYH10VO/5x (RE 92703), HYH10VNO (RE 92735), and HYH4VSO (RE 92050). Fluid delivery flow is directly proportional to drive speed and swashplate displacement angle, allowing stepless variable regulation with closed-loop controls. Across its 7 modular double-displacement frame sizes—HYH20VO-60, HYH20VO-72, HYH20VNO-85, HYH20VO-95, HYH20VLO-190, HYH20VLO-260, and HYH20VO-520—the series covers continuous working pressures from 210 bar up to 350 bar (5100 psi) and maximum peak operating pressures up to 400 bar (5800 psi). Depending on machine duty requirements, pump operation can be configured as self-priming, with a priming reservoir, or with an integrated high-speed centrifugal charge pump (HYH20VLO versions on sizes 190 and 260). Power settings can be adjusted externally during active machine operation, and a universal 100% full-torque rear through-drive accommodates secondary gear pumps or axial piston pumps to eliminate expensive splitter gearboxes. Backed by modular control options including hyperbolic power controllers (LR/LRD/LRDS/DFLR), cross-sensing power summation (LR.C), load-sensing flow matching (DFR/DRS), electric proportional overrides (LE2), hydraulic pilot controls (HD2), and high-response electrohydraulic servo valves (HS5), the HYH20VO Series 10 provides a proven, drop-in replacement solution for heavy-duty multi-circuit hydraulic machines.
| Applications
The HYH20VO Series 10 variable double pump is engineered specifically for heavy-duty, multi-circuit open-circuit mobile and industrial hydraulic systems requiring high simultaneous flow, independent dual-circuit operation, and compact single-input drive packaging:
Heavy Hydraulic Mining Excavators & High-Tonnage Diggers: Dedicated twin-circuit power generation for main boom lift, arm crowd, bucket curl, and independent dual-track crawler travel drives on 40-ton to 200-ton excavators.
Rotary Drilling Rigs & Heavy Piling Equipment: Powers rotary powerhead high-torque rotation on circuit 1 while simultaneously driving mast crowd winches, kelly-bar feed, and auxiliary casing oscillators on circuit 2.
Mobile All-Terrain, Rough-Terrain & Crawler Cranes: Independent dual-pump power supply for high-speed multi-part hoist line winches, continuous proportional slewing drives, and multi-stage telescopic boom extension cylinders.
Concrete Boom Pumps & Stationary High-Pressure Concrete Pumps: Simultaneous high-pressure twin-stream delivery for twin pumping cylinder cycling, S-tube switching valve actuation, and hydraulic placing boom articulation.
Industrial Heavy Extrusion Presses & Forging Manipulators: Large-displacement power supply (up to 2×520 cm³/rev, delivering up to 1508 L/min) for industrial hydraulic presses, scrap shears, forging manipulators, and marine winch skids.
Integrated Multi-Pump Power Skids (Splitter Gearbox Replacement): Back-to-back dual rotary groups powered by a single diesel engine or electric motor input shaft, eliminating bulky splitter gearboxes through standardized rear through-drives.
| Key Specifications Overview
| Parameter | Hengyuhang HYH20VO Series 10 Specification (OEM Benchmark Standard) |
|---|---|
| Pump Classification | Axial Piston Variable Double Pump in Swashplate Design for Open Circuits (HYH20VO, HYH20VNO, HYH20VLO Series 10) |
| OEM Interchange Reference | Direct 1:1 physical, dimensional, and hydraulic drop-in replacement for Rexroth A20VO, A20VNO, A20VLO Series 10 (RE 93100) |
| Displacement Size Range | 7 Modular Double Frame Sizes: 2×60.0, 2×72.0, 2×85.0, 2×93.8, 2×192.7, 2×260.0, and 2×520.0 cm³/rev per rotary group |
| Modular Architecture Pedigree | Built from proven modular rotary groups: HYH10VO/5x (60, 72), HYH10VNO/53 (85), HYH11V(L)O/1x (95, 190, 260), HYH4VSO/30 (520) |
| Nominal Continuous Pressure (pnom) | Sizes 60, 72: 250 bar (3625 psi); Size 85 (VNO): 210 bar (3045 psi); Sizes 95, 190, 260, 520: 350 bar (5100 psi / 35 MPa) |
| Maximum Peak Operating Pressure (pmax) | Sizes 60, 72: 315 bar (4568 psi); Size 85 (VNO): 250 bar (3625 psi); Sizes 95, 190, 260, 520: 400 bar (5800 psi / 40 MPa) |
| Minimum Pressure at High-Pressure Port (pabs min) | 10 bar minimum absolute holding pressure required at high-pressure port B to prevent internal slipper shoe separation |
| Rate of Pressure Change (RA max) | 16,000 bar/s (232,060 psi/s) maximum permissible rate of pressure build-up and reduction across entire pressure range |
| Rotational Speed Range (at Vg max, pabs = 1 bar) | Nominal drive speeds from 1450 rpm (Size 520) up to 2700 rpm (Sizes 60, 85); Maximum speed at reduced displacement up to 3140 rpm |
| Suction Pressure Range (Port S Inlet) | Standard sizes: pS min ≥ 0.8 bar absolute at n_nom (pS max ≤ 5 bar on 60~85; pS max ≤ 30 bar on 95, 520; pS max ≤ 2 bar on VLO 190, 260) |
| Case Drain Pressure Rating (Ports L / T) | Maximum continuous case pressure pL max ≤ 2 bar absolute (30 psi); Case pressure must always exceed ambient pressure |
| Rotary Group & Swashplate Technology | Dual back-to-back swashplate rotary groups with shared drive shaft, hardened cylinder barrels, and heavy-duty cradle bearings |
| Mounting Flange Standards | ISO 3019-1 (SAE J744 4-bolt): SAE C 127-4 (60~85); SAE D 152-4 (95); SAE E 165-4 (190, 260); ISO 3019-2 8-hole metric (520) |
| Drive Shaft Configurations | Splined shaft ISO 3019-1 Code S (60~85); DIN 5480 Code Z (95~520: W45, W50, W60, W80); ANSI B92.1a Code S (95), Code T (190, 260) |
| Working Fluid Ports (Dual Outlet B1, B2) | SAE J518 / ISO 6162 Code 61 1 in (60~85); Code 62 1 in (95); Code 62 1 1/2 in (190, 260); Code 62 2 in (520, multiple ports B1~B4) |
| Suction Fluid Port (Shared Single Inlet S) | SAE J518 / ISO 6162 Code 61: 2 1/2 in (60~85); 3 1/2 in (95); 5 in (190, 260, 520), optimized single shared suction header |
| Case Drain Ports (L1~L4 / T1, T2) | Sizes 60~85: 7/8-14 UNF-2B (Ports L1~L4); Sizes 95: M26×1.5; Sizes 190, 260: M33×2; Size 520: M48×2 (Ports K1~K4, T1) |
| Sealing Material System | Code V: Premium FKM (fluorocarbon rubber) standard (-25°C to +110°C); Code N: NBR with FKM shaft seal ring (-40°C to +90°C) |
| Direction of Rotation | Clockwise (Code R) or Counter-Clockwise (Code L), viewed facing input drive shaft |
| Operating Viscosity Range | Optimum: νopt = 16 to 36 mm²/s; Permissible: ν = 10 to 400 mm²/s; Maximum cold start: νmax ≤ 1600 mm²/s |
| Fluid Cleanliness Standard | ISO 4406 Class 20/18/15 minimum (Class 19/17/14 recommended for high operating temperatures or extended life) |
| Through-Drive Capability | Universal rear through-drive mountings (SAE A, B, C) for mounting auxiliary gear or piston pumps (K01, K52, K02, K04, K68, K07) |
| Technical Performance Matrix Across Available Sizes
| ■ Heavy-Duty Variable Double Pump Series (HYH20VO, HYH20VNO, HYH20VLO — Sizes 60 to 520 Benchmark) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model Number (Hengyuhang Series) | Displacement per Group (cm³) | Drive Speed (rpm) | Delivery Flow @ n_nom (L/min) | Nominal Pressure pnom (bar) | Drive Power @ pnom (kW) | Drive Torque @ pnom (Nm) | Shaft Stiffness c (kNm/rad) | Inertia JTW (kg·m²) | Case Fill (L) | Unit Mass m w/o thru (kg) | ||
| Nominal n_nom | Max n_max | Shaft Z | Shaft S / T | |||||||||
| HYH20VO-60 | 60.00 (2×60.0) | 2700 | 3140 | 2 × 162 (324.0) | 250 | 135.0 | 477.0 | – | 65.5 (S) | 0.0113 | 1.60 | 44.0 |
| HYH20VO-72 | 72.00 (2×72.0) | 2600 | 3140 | 2 × 187 (374.0) | 250 | 154.0 | 572.0 | – | 65.5 (S) | 0.0113 | 1.60 | 44.0 |
| HYH20VNO-85 | 85.00 (2×85.0) | 2700 | – | 2 × 230 (460.0) | 210 | 160.0 | 568.0 | – | 65.5 (S) | 0.0113 | 1.60 | 44.0 |
| HYH20VO-95 | 93.80 (2×93.8) | 2350 | 2780 | 2 × 220 (440.0) | 350 | 257.0 | 1045.0 | 199.6 | 173.7 (S) | 0.0346 | 4.20 | 107.0 |
| HYH20VLO-190 | 192.70 (2×192.7) | 2500 | 2500 | 2 × 482 (964.0) | 350 | 562.0 | 2147.0 | 346.2 | 301.9 (T) | 0.1127 | 7.60 | 213.0 |
| HYH20VLO-260 | 260.00 (2×260.0) | 2300 | 2300 | 2 × 598 (1196.0) | 350 | 698.0 | 2897.0 | 686.5 | 567.1 (T) | 0.1773 | 9.20 | 275.0 |
| HYH20VO-520 | 520.00 (2×520.0) | 1450 | 1720 | 2 × 754 (1508.0) | 350 | 880.0 | 5793.0 | 1136.0 | – | 0.6960 | 28.00 | 640.0 |
| Control Devices & Operating Mechanisms
| Control Code | Control Classification | Applicable Pump Sizes | Functional Operation & Circuit Application |
|---|---|---|---|
| DR / DRG | Pressure Controller / Remote Pressure | Sizes 60, 72, 85, 95, 190, 260 | Maintains constant circuit pressure in both circuits; DRG features pilot port X for remote proportional relief valve connection. |
| DFR / DFR1 | Pressure & Flow Controller (Load-Sensing) | Sizes 60, 72, 85 | Matches pump displacement directly to proportional directional valve load demand, minimizing metering losses (DFR1: unloaded pilot line). |
| DFLR | Pressure, Flow & Power Controller | Sizes 60, 72, 85 | Hyperbolic horsepower limiter with integrated load-sensing and high-pressure cut-off for compact excavator implement circuits. |
| LR / LRD / LRDS | Power Controller with Pressure Cut-Off & LS | Sizes 95, 190, 260 | Maintains constant prime mover horsepower along a hyperbolic curve; LRDS adds dynamic load-sensing flow matching via differential pilot spool. |
| LR.C | Power Controller with Cross-Sensing Summation | Sizes 95, 190, 260 | Dual-circuit power summation; interconnects pilot lines of both rotary groups to balance flow between circuits while fully utilizing engine horsepower. |
| LE2 / LE2S | Power Controller with Electric Proportional Override | Sizes 95, 190, 260 | Proportional electric override (24V DC solenoid, DEUTSCH connector) allows electronic ECU management of pump power limits. |
| HD2 / HD2D | Hydraulic Proportional Displacement Control | Sizes 95, 190, 260 | Pilot pressure signal (Δp = 25 bar) at port Y positions the swashplate tilt angle proportionally; HD2D includes pressure cut-off. |
| LR3N / LR2DN / LR3GN | Heavy Industrial Hyperbolic Power Controller | Size 520 | Heavy-duty industrial power regulator with hyperbolic curve adjustment, remote pressure cut-off, and electric/hydraulic overrides for large presses. |
| HS5 / HS5P | Electrohydraulic Servo Control with Position Sensor | Size 520 | High-response closed-loop electrohydraulic servo displacement control with integrated electronic inductive position transducer for computerized press controls. |
| Mounting Flange, Shaft and Port Specifications Across Sizes
| Mechanical Installation Interface (Mounting Flange & Drive Shaft) | ||
|---|---|---|
| Frame Size Model | Mounting Flange Standards | Drive Shaft Options (Splined Standards) |
| HYH20VO-60 | Code D: ISO 3019-1 (SAE J744 127-4 / SAE C 4-bolt: Pilot Ø127.0 mm, pitch circle Ø161.9 mm) | Code S: Splined shaft ISO 3019-1 (1 1/4 in, ME max = 630 Nm) |
| HYH20VO-72 | Code D: ISO 3019-1 (SAE J744 127-4 / SAE C 4-bolt: Pilot Ø127.0 mm, pitch circle Ø161.9 mm) | Code S: Splined shaft ISO 3019-1 (1 1/4 in, ME max = 630 Nm) |
| HYH20VNO-85 | Code D: ISO 3019-1 (SAE J744 127-4 / SAE C 4-bolt: Pilot Ø127.0 mm, pitch circle Ø161.9 mm) | Code S: Splined shaft ISO 3019-1 (1 1/4 in, ME max = 630 Nm) |
| HYH20VO-95 | Code D: ISO 3019-1 (SAE J744 152-4 / SAE D 4-bolt: Pilot Ø152.4 mm, pitch Ø228.6 mm); Code G: SAE J617 | Code Z: DIN 5480 W45×2×21×9g (ME max = 2190 Nm); Code S: ANSI B92.1a 1 3/4 in 13T 8/16DP |
| HYH20VLO-190 | Code D: ISO 3019-1 (SAE J744 165-4 / SAE E 4-bolt: Pilot Ø165.1 mm, pitch Ø224.5 mm); Code G: SAE J617 | Code Z: DIN 5480 W50×2×24×9g (ME max = 3140 Nm); Code T: ANSI B92.1a 2 in 15T 8/16DP |
| HYH20VLO-260 | Code D: ISO 3019-1 (SAE J744 165-4 / SAE E 4-bolt: Pilot Ø165.1 mm, pitch circle Ø224.5 mm) | Code Z: DIN 5480 W60×2×28×9g (ME max = 5780 Nm); Code T: ANSI B92.1a 2 in 15T 8/16DP |
| HYH20VO-520 | Code H: ISO 3019-2 8-hole metric heavy industrial flange | Code Z: Splined shaft DIN 5480 W80×3×25×9g (ME max = 5793 Nm) |
| Fluid Port Configuration (Service, Suction, Drain, Air Bleed & Gauge Ports) | |||||
|---|---|---|---|---|---|
| Frame Size Model | Dual Working Ports B1, B2 (A, B) | Shared Suction Port S | Case Drain Ports L / T | Air Bleed Port R | Gauge & Pilot Ports |
| HYH20VO-60 | SAE J518 Code 61 1 in (315 bar, M10×1.5) | SAE J518 Code 61 2 1/2 in (5 bar, M12×1.75) | DIN 3852 7/8-14 UNF-2B (L1~L4) | Via upper case drain | Pilot X1, X2 (DFR) |
| HYH20VO-72 | SAE J518 Code 61 1 in (315 bar, M10×1.5) | SAE J518 Code 61 2 1/2 in (5 bar, M12×1.75) | DIN 3852 7/8-14 UNF-2B (L1~L4) | Via upper case drain | Pilot X1, X2 (DFR) |
| HYH20VNO-85 | SAE J518 Code 61 1 in (250 bar, M10×1.5) | SAE J518 Code 61 2 1/2 in (5 bar, M12×1.75) | DIN 3852 7/8-14 UNF-2B (L1~L4) | Via upper case drain | Pilot X1, X2 (DFR) |
| HYH20VO-95 | SAE J518 Code 62 1 in (400 bar, M12×1.75) | SAE J518 Code 61 3 1/2 in (30 bar, M16×2) | DIN 3852 M26×1.5 (T1, T2) | DIN 3852 M27×2 (R) | MA, MB, M1: M12×1.5; G: M14×1.5 |
| HYH20VLO-190 | SAE J518 Code 62 1 1/2 in (400 bar, M16×2) | SAE J518 Code 61 5 in (30 bar, M16×2) | DIN 3852 M33×2 (T1, T2) | DIN 3852 M33×2 (R) | MA, MB, M1: M12×1.5; GA, GB: M14×1.5 |
| HYH20VLO-260 | SAE J518 Code 62 1 1/2 in (400 bar, M16×2) | SAE J518 Code 61 5 in (30 bar, M16×2) | DIN 3852 M33×2 (T1, T2) | DIN 3852 M33×2 (R) | MA, MB, M1: M12×1.5; GA, GB: M14×1.5 |
| HYH20VO-520 | SAE J518 Code 62 2 in (400 bar, B1~B4) | SAE J518 Code 61 5 in (30 bar, M16×2) | DIN 3852 M48×2 (K1~K4, T1) | DIN 3852 M48×2 [R(L)1, R(L)2] | MB1~MB6, MA1, MA2, Mp1, Mp2 |
| Through-Drive Options and Multi-Pump Combinations
| Through-Drive Code | Mounting Flange Standard | Internal Splined Coupling Hub | Applicable Frame Sizes & Auxiliary Pump Combinations |
|---|---|---|---|
| N00 | Without through drive | None (closed rear housing end) | Single double-pump standalone configuration (Sizes 95, 190, 260) |
| K99 | Ready for through drive | Without hub, with pressure cover | Sealed heavy industrial cover for future tandem extension (Size 520) |
| K01 | ISO 3019-1 82-2 (SAE A 2-bolt) | Spline ANSI B92.1a 5/8 in 9T 16/32DP | Mounting auxiliary external gear pumps AZPF or HYH10VO-10/18 (Sizes 60~260) |
| K52 | ISO 3019-1 82-2 (SAE A 2-bolt) | Spline ANSI B92.1a 3/4 in 11T 16/32DP | Mounting auxiliary external gear pumps AZPF or HYH10VO-18 (Sizes 60, 72, 85) |
| K02 | ISO 3019-1 101-2 (SAE B 2-bolt) | Spline ANSI B92.1a 7/8 in 13T 16/32DP | Mounting auxiliary gear pumps AZPN/AZPG or HYH10VO-28/45 (Sizes 95, 190, 260) |
| K68 | ISO 3019-1 101-2 (SAE B 2-bolt) | Spline ANSI B92.1a 7/8 in 13T 16/32DP | Mounting auxiliary gear pumps AZPN/AZPG or HYH10VO-28/45 (Sizes 60, 72, 85) |
| K04 | ISO 3019-1 101-2 (SAE B 2-bolt) | Spline ANSI B92.1a 1 in 15T 16/32DP | Mounting secondary HYH10VO-45/60 or HYH11VO-40 piston pumps (Sizes 95, 190, 260) |
| K07 | ISO 3019-1 127-2 (SAE C 2-bolt) | Spline ANSI B92.1a 1 1/4 in 14T 12/24DP | Mounting secondary HYH10VO-71/85/100 or HYH11VO-60 piston pumps (Sizes 95, 190, 260, 520) |
| Direct Interchangeability and OEM Replacement Matrix (Rexroth A20VO Series 10)
| Hengyuhang Series Model | Rexroth OEM Reference Model (A20VO Series 10) | Interchangeability Verification Status |
|---|---|---|
| HYH20VO-60 | A20VO 60 DFR1 / 10R-VSD24K01 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VO-72 | A20VO 72 DFR1 / 10R-VSD24K01 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VNO-85 | A20VNO 85 DFR1 / 10R-VSD24K01 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VO-95 | A20VO 95 LRDS / 10R-NZD24K02 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VLO-190 | A20VLO 190 LRDS / 10R-NZD24K04 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VLO-260 | A20VLO 260 LRDS / 10R-NZD24K07 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VO-520 | A20VO 520 LR2DN / 10R-VZH26K99 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| Model Coding & Ordering Structure
| Position | Code Segment | Available Standard Options | Technical Definition & Feature Description |
|---|---|---|---|
| [01] | Unit Type | HYH20V | Variable swashplate double pump with two rotary groups in back-to-back configuration |
| [02] | Additional Function | (None) / N / L | (None): Standard pressure without charge pump (Sizes 60, 72, 95, 520) N: Low pressure area without charge pump (Size 85) L: With integrated high-speed centrifugal charge pump (Sizes 190, 260) |
| [03] | Operating Mode | O | Code O: Open circuit double pump |
| [04] | Frame Size | 60 / 72 / 85 / 95 / 190 / 260 / 520 | Geometric displacement per rotary group in cm³/rev (60.0, 72.0, 85.0, 93.8, 192.7, 260.0, 520.0) |
| [05] | Control Device | DR / DRG / DFR / DFR1 / DFLR LR / LRD / LRDS / LR.C / LE2 / HD2 LR3N / LR2DN / LR3DN / HS5 | Sizes 60, 72, 85: Pressure/flow/power controls (RE 92703/92735) Sizes 95, 190, 260: Hyperbolic power, cross-sensing & proportional controls (RE 92500) Size 520: Heavy industrial power and electrohydraulic servo controls (RE 92050/92076) |
| [06] | Series & Index | 10 | Series 1, Index 0 |
| [07] | Direction of Rotation | R / L | Code R: Clockwise; Code L: Counter-Clockwise (viewed facing drive shaft) |
| [08] | Sealing Material | V / N | Code V: Premium FKM standard (-25°C to +110°C); Code N: NBR with FKM shaft seal ring (-40°C to +90°C) |
| [09] | Drive Shaft | S / Z / T | Code S: Splined ISO 3019-1 (60~85), ANSI B92.1a 1 3/4 in (95) Code Z: Splined DIN 5480 (W45 on 95, W50 on 190, W60 on 260, W80 on 520) Code T: Splined ANSI B92.1a 2 in 15T (190, 260) |
| [10] | Mounting Flange | D / G / H | Code D: ISO 3019-1 4-hole (SAE C on 60~85, SAE D on 95, SAE E on 190, 260) Code G: Based on SAE J617 (SAE 3) flywheel housing (95, 190) Code H: Based on ISO 3019-2 8-hole metric heavy flange (520) |
| [11] | Working Ports | 24 / 26 | Code 24: Two port B and one port S laterally opposite, metric thread (Sizes 60~260) Code 26: Two port B laterally opposite, one port S offset 90°, metric thread (Size 520) |
| [12] | Through Drive | N00 / K99 / K01 / K52 K02 / K04 / K68 / K07 | N00: Without through drive (95~260); K99: Plugged with pressure cover (520) K01/K52: SAE A 82-2; K02/K04/K68: SAE B 101-2; K07: SAE C 127-2 |
| Technical Performance Matrix Across Available Sizes
| ■ Heavy-Duty Variable Double Pump Series (HYH20VO, HYH20VNO, HYH20VLO — Sizes 60 to 520 Benchmark) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Model Number (Hengyuhang Series) | Displacement per Group (cm³) | Drive Speed (rpm) | Delivery Flow @ n_nom (L/min) | Nominal Pressure pnom (bar) | Drive Power @ pnom (kW) | Drive Torque @ pnom (Nm) | Shaft Stiffness c (kNm/rad) | Inertia JTW (kg·m²) | Case Fill (L) | Unit Mass m w/o thru (kg) | ||
| Nominal n_nom | Max n_max | Shaft Z | Shaft S / T | |||||||||
| HYH20VO-60 | 60.00 (2×60.0) | 2700 | 3140 | 2 × 162 (324.0) | 250 | 135.0 | 477.0 | – | 65.5 (S) | 0.0113 | 1.60 | 44.0 |
| HYH20VO-72 | 72.00 (2×72.0) | 2600 | 3140 | 2 × 187 (374.0) | 250 | 154.0 | 572.0 | – | 65.5 (S) | 0.0113 | 1.60 | 44.0 |
| HYH20VNO-85 | 85.00 (2×85.0) | 2700 | – | 2 × 230 (460.0) | 210 | 160.0 | 568.0 | – | 65.5 (S) | 0.0113 | 1.60 | 44.0 |
| HYH20VO-95 | 93.80 (2×93.8) | 2350 | 2780 | 2 × 220 (440.0) | 350 | 257.0 | 1045.0 | 199.6 | 173.7 (S) | 0.0346 | 4.20 | 107.0 |
| HYH20VLO-190 | 192.70 (2×192.7) | 2500 | 2500 | 2 × 482 (964.0) | 350 | 562.0 | 2147.0 | 346.2 | 301.9 (T) | 0.1127 | 7.60 | 213.0 |
| HYH20VLO-260 | 260.00 (2×260.0) | 2300 | 2300 | 2 × 598 (1196.0) | 350 | 698.0 | 2897.0 | 686.5 | 567.1 (T) | 0.1773 | 9.20 | 275.0 |
| HYH20VO-520 | 520.00 (2×520.0) | 1450 | 1720 | 2 × 754 (1508.0) | 350 | 880.0 | 5793.0 | 1136.0 | – | 0.6960 | 28.00 | 640.0 |
| Hengyuhang Series Model | Rexroth OEM Reference Model (A20VO Series 10) | Interchangeability Verification Status |
|---|---|---|
| HYH20VO-60 | A20VO 60 DFR1 / 10R-VSD24K01 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VO-72 | A20VO 72 DFR1 / 10R-VSD24K01 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VNO-85 | A20VNO 85 DFR1 / 10R-VSD24K01 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VO-95 | A20VO 95 LRDS / 10R-NZD24K02 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VLO-190 | A20VLO 190 LRDS / 10R-NZD24K04 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VLO-260 | A20VLO 260 LRDS / 10R-NZD24K07 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| HYH20VO-520 | A20VO 520 LR2DN / 10R-VZH26K99 | 100% Direct Physical, Dimensional & Hydraulic Drop-in Replacement |
| Position | Code Segment | Available Standard Options | Technical Definition & Feature Description |
|---|---|---|---|
| [01] | Unit Type | HYH20V | Variable swashplate double pump with two rotary groups in back-to-back configuration |
| [02] | Additional Function | (None) / N / L | (None): Standard pressure without charge pump (Sizes 60, 72, 95, 520) N: Low pressure area without charge pump (Size 85) L: With integrated high-speed centrifugal charge pump (Sizes 190, 260) |
| [03] | Operating Mode | O | Code O: Open circuit double pump |
| [04] | Frame Size | 60 / 72 / 85 / 95 / 190 / 260 / 520 | Geometric displacement per rotary group in cm³/rev (60.0, 72.0, 85.0, 93.8, 192.7, 260.0, 520.0) |
| [05] | Control Device | DR / DRG / DFR / DFR1 / DFLR LR / LRD / LRDS / LR.C / LE2 / HD2 LR3N / LR2DN / LR3DN / HS5 | Sizes 60, 72, 85: Pressure/flow/power controls (RE 92703/92735) Sizes 95, 190, 260: Hyperbolic power, cross-sensing & proportional controls (RE 92500) Size 520: Heavy industrial power and electrohydraulic servo controls (RE 92050/92076) |
| [06] | Series & Index | 10 | Series 1, Index 0 |
| [07] | Direction of Rotation | R / L | Code R: Clockwise; Code L: Counter-Clockwise (viewed facing drive shaft) |
| [08] | Sealing Material | V / N | Code V: Premium FKM standard (-25°C to +110°C); Code N: NBR with FKM shaft seal ring (-40°C to +90°C) |
| [09] | Drive Shaft | S / Z / T | Code S: Splined ISO 3019-1 (60~85), ANSI B92.1a 1 3/4 in (95) Code Z: Splined DIN 5480 (W45 on 95, W50 on 190, W60 on 260, W80 on 520) Code T: Splined ANSI B92.1a 2 in 15T (190, 260) |
| [10] | Mounting Flange | D / G / H | Code D: ISO 3019-1 4-hole (SAE C on 60~85, SAE D on 95, SAE E on 190, 260) Code G: Based on SAE J617 (SAE 3) flywheel housing (95, 190) Code H: Based on ISO 3019-2 8-hole metric heavy flange (520) |
| [11] | Working Ports | 24 / 26 | Code 24: Two port B and one port S laterally opposite, metric thread (Sizes 60~260) Code 26: Two port B laterally opposite, one port S offset 90°, metric thread (Size 520) |
| [12] | Through Drive | N00 / K99 / K01 / K52 K02 / K04 / K68 / K07 | N00: Without through drive (95~260); K99: Plugged with pressure cover (520) K01/K52: SAE A 82-2; K02/K04/K68: SAE B 101-2; K07: SAE C 127-2 |
WhatsApp
Email
+86 19918575358
