Gear pump
External Hydraulic Gear Pump . Group 3PDF 20CC-71CC 4-hole rectangular series
Hengyuhang External Hydraulic Gear Pump Group 3PDF 4-Hole Rectangular Series is a robust positive displacement gear pump designed to deliver high volumetric efficiency and stable fluid power under demanding industrial and mobile operating pressures.
| Applications of Hengyuhang External Hydraulic Gear Pump Group 3PDF 4-Hole Rectangular Series
This external gear pump is engineered for heavy-duty fluid transfer and hydraulic circuit pressurization across industrial manufacturing, agricultural machinery, and mobile hydraulic systems. It powers auxiliary functions, steering circuits, and drive mechanisms in equipment operating under continuous high loads and severe environmental conditions.
| Key Technical Specifications
Product Model: Hengyuhang External Hydraulic Gear Pump Group 3PDF 4-Hole Rectangular Series
Brand Replacement: CASAPPA, Rexroth, Marzocchi, Parker OEM or as requested.
Displacement: 20 to 71 cm³/rev
Rotation Direction: Clockwise (D), counter-clockwise (S), reversible (R)
Speed Range: Min. speed 400 to 600 r/min; Max. speed 2500 to 3500 r/min
Peak Pressure: 220 to 280 bar
- Description
- Tecspecs
- Brand & Reference
- Download HENGYUHANG 3PDF Hydraulic Gear Pump PDF
- Send an Inquiry
| Overview of HENGYUHANG Group 3PDF 4-Hole Rectangular Series External Hydraulic Gear Pumps
The HENGYUHANG Group 3PDF 4-Hole Rectangular Series represents heavy-duty continental fluid power engineering, featuring a standard European 4-bolt rectangular mounting flange configuration designed for rigid, vibration-resistant direct bell-housing installation. Covering a comprehensive high-flow displacement spectrum from 20.0 up to 71.0 cm³/rev, this series is engineered specifically to replace European standard 4-bolt Group 3 external gear pumps across 39 leading international hydraulic manufacturers without necessitating mounting bracket modifications, bell-housing re-machining, or hydraulic piping realignment.
Constructed using a high-density extruded aerospace-grade aluminum alloy central gear casing paired with heavy-duty spheroidal graphite ductile cast-iron or aluminum front 4-bolt mounting flanges and rear end-covers, the pump resists housing barrel dilation under severe continuous working pressures up to 250 bar (3,625 psi) and transient peak pressures up to 280 bar (4,060 psi). The internal rotating group incorporates case-hardened, precision-ground alloy steel gears supported by high-load hydrodynamic composite DU/PTFE sleeve bushings. Dual hydrostatic floating axial pressure balance thrust plates automatically compensate for operating wear and thermal clearance variations, sustaining volumetric efficiencies above 94% while providing smooth, low-pulsation fluid delivery across demanding mobile construction machinery and heavy industrial hydraulic power units.
| Dimension of HENGYUHANG Group 3PDF 4-Hole Rectangular Series External Hydraulic Gear Pumps
Interface data needed with the drawing:
| Item | Value |
|---|---|
| Mounting flange | European standard 4-bolt rectangular mounting flange (pilot Ø 50.8 -0.025/-0.080 mm with 98.5 × 128.0 mm bolt pitch, 4-Ø 11.4 mm through mounting holes, flange overall 122.0 × 152.0 mm, 5.0 mm pilot depth) |
| Drive shaft | 1:8 European taper shaft with woodruff key (key width 4.0 -0.03 mm, key height 12.2 mm, M14 × 1.5 retaining nut, Ø 19.0 mm taper base, 47.0 mm shaft extension from pilot face: 33.0 mm taper + 14.0 mm thread) / Cylindrical keyed shaft / Involute splined shaft |
| Outboard bearing | Standard without front bearing (direct bell-housing coupling engagement) / Optional heavy-duty front radial/axial bearing for belt, chain, and pulley drive systems |
| Rotation | Clockwise (D) or Anti-clockwise (S), looking at the drive shaft end (Bi-directional reversible rotation available upon request) |
| Ports position | Side-positioned flanged ports on body / Rear-cover ports for compact manifold block integration |
| Inlet Port | European standard 4-bolt rectangular flanged port (M10 tapped holes, Ø 27.0 mm or Ø 33.0 mm counterbore with 51.0 mm, 56.0 mm, or 62.0 mm bolt pitch) / G 1-1/4" BSPP thread / 1-5/8-12 UN SAE O-ring boss |
| Outlet Port | European standard 4-bolt rectangular flanged port (M10 tapped holes, Ø 19.0 mm or Ø 27.0 mm counterbore with 51.0 mm or 56.0 mm bolt pitch) / G 3/4" or G 1" BSPP thread / 1-1/16-12 UN SAE O-ring boss |
| Seals | N — Buna-N (NBR) elastomeric seals (-20 °C to +85 °C) standard; Viton (FKM) available for high-temperature hydraulic fluids (-15 °C to +110 °C) |
| Body construction | High-tensile extruded aluminum alloy body with ductile cast-iron or aluminum 4-hole rectangular front mounting flange and rear cover |
| Flange mounting bolt torque | 85 ±5 Nm (752 ÷ 796 lbf in) |
| Body tie-rod clamp bolt torque | 95 ±5 Nm (840 ÷ 885 lbf in) |
| Pump Installation Specifications HENGYUHANG Group 3PDF 4-Hole Rectangular Series
The HENGYUHANG Group 3PDF 4-Hole Rectangular Series pump utilizes a standardized modular ordering and specification code to ensure precise mechanical, hydraulic, and mounting interchangeability:
Code structure — reference: 3PDF — Group 3 4-Hole Rectangular High-Pressure External Gear Pump Series
| Segment | Meaning | Standard Options & Features |
|---|---|---|
| Series | 3PDF | Group 3 heavy-duty high-pressure external gear pump architecture with 4-hole rectangular flange (20.0 to 71.0 cm³/rev) |
| Displacement | 20 to 71 | Geometric displacement in cm³/rev (20, 22, 26, 33, 39, 46, 50, 52, 55, 63, 71) |
| Rotation | D / S / R | D: Clockwise; S: Anti-clockwise; R: Reversible / Bi-directional |
| Outboard Bearing | 0 / 1 | 0: Standard without front bearing; 1: With heavy-duty front radial/axial support bearing |
| Drive Shaft | T6 / C1 / S1 | T6: 1:8 European taper shaft with woodruff key (M14 × 1.5 nut, Ø 19 mm base); C1: Cylindrical keyed shaft; S1: DIN 5482 splined shaft |
| Mounting Flange | E4 / G4 | E4: European standard 4-bolt rectangular flange (pilot Ø 50.8 mm, 98.5 × 128.0 mm pitch); G4: German standard rectangular flange |
| Ports Code | L / P | L: Side flanged/threaded body ports; P: Rear cover threaded ports |
| Inlet / Outlet | F3 / G3 / U3 | F3: European 4-bolt flanged ports (M10); G3: BSPP cylindrical thread; U3: SAE straight thread O-ring boss |
| Seals | N / V | N: Buna-N (NBR) standard; V: Viton (FKM) high-temperature seals |
| Special Features | RV / ST | RV: Integrated internal pressure relief valve; ST: Customized OEM body configuration |
| Reading your replacement code
| Your Target Brand & Model | HENGYUHANG 3PDF Equivalent | Interchange Verification Notes |
|---|---|---|
| CASAPPA POLARIS PLP30 (4-Hole Rectangular Flange) | HENGYUHANG 3PDF Series | 100% mounting spigot pilot Ø 50.8 mm, 4-bolt pitch (98.5 × 128 mm), shaft taper T6, and port centerlines match |
| Bosch Rexroth AZPF / AZPN (Group 3 4-Bolt Flange) | HENGYUHANG 3PDF Series | Identical mounting pilot, shaft woodruff key, and continuous pressure rating match |
| MARZOCCHI 3P / ALP3 / GHP3 (Standard 4-Bolt) | HENGYUHANG 3PDF Series | Direct mechanical envelope match; identical inlet/outlet M10 flange drillings |
| PARKER PGP517 / PGP620 (European 4-Bolt Flange) | HENGYUHANG 3PDF Series | Full hydraulic flow compatibility, exact 4-bolt rectangular pattern, and shaft interchange |
| DANFOSS Power Solutions (SNP3 / Turolla Group 3) | HENGYUHANG 3PDF Series | Seamless drop-in fit for European agricultural tractors, forestry loaders, and industrial HPUs |
| VIVOLO (Vivoil) X3P / XV-3P (European 4-Bolt) | HENGYUHANG 3PDF Series | Direct interchange on shaft, flange, and side European rectangular flanged ports |
| SALAMI 3PB / 3PE (European 4-Bolt Spigot) | HENGYUHANG 3PDF Series | Identical bolt hole pattern, shaft dimensions, and gear journal high-pressure ratings |
| BUCHER Hydraulics AP300 / QX3 (4-Hole Flange) | HENGYUHANG 3PDF Series | Direct mounting fit for heavy industrial machine tools, presses, and mobile cranes |
Techspecs — HENGYUHANG Group 3PDF 4-Hole Rectangular Series
Performance Data Across Displacements
| Model Code | Displacement (cm³/rev) | Displacement (in³/rev) | Continuous Pressure p1 (bar / psi) | Intermittent Pressure p2 (bar / psi) | Peak Pressure p3 (bar / psi) | Min. Speed (r/min) | Max. Speed (r/min) | Flow at 1500 r/min (l/min) |
|---|---|---|---|---|---|---|---|---|
| 3PDF-20-D*T6 | 20.00 | 1.220 | 250 / 3,625 | 265 / 3,843 | 280 / 4,060 | 600 | 3,500 | 30.00 |
| 3PDF-22-D*T6 | 22.00 | 1.343 | 250 / 3,625 | 265 / 3,843 | 280 / 4,060 | 600 | 3,500 | 33.00 |
| 3PDF-26-D*T6 | 26.00 | 1.586 | 250 / 3,625 | 265 / 3,843 | 280 / 4,060 | 600 | 3,000 | 39.00 |
| 3PDF-33-D*T6 | 33.00 | 2.014 | 230 / 3,335 | 250 / 3,625 | 270 / 3,915 | 500 | 3,000 | 49.50 |
| 3PDF-39-D*T6 | 39.00 | 2.380 | 230 / 3,335 | 250 / 3,625 | 270 / 3,915 | 500 | 3,000 | 58.50 |
| 3PDF-46-D*T6 | 46.00 | 2.807 | 230 / 3,335 | 250 / 3,625 | 270 / 3,915 | 500 | 3,000 | 69.00 |
| 3PDF-50-D*T6 | 50.00 | 3.051 | 220 / 3,190 | 240 / 3,480 | 260 / 3,770 | 500 | 3,000 | 75.00 |
| 3PDF-52-D*T6 | 52.00 | 3.173 | 220 / 3,190 | 240 / 3,480 | 260 / 3,770 | 500 | 3,000 | 78.00 |
| 3PDF-55-D*T6 | 55.00 | 3.356 | 200 / 2,900 | 230 / 3,335 | 250 / 3,625 | 400 | 2,800 | 82.50 |
| 3PDF-63-D*T6 | 63.00 | 3.844 | 200 / 2,900 | 230 / 3,335 | 250 / 3,625 | 400 | 2,800 | 94.50 |
| 3PDF-71-D*T6 | 71.00 | 4.333 | 180 / 2,610 | 200 / 2,900 | 220 / 3,190 | 400 | 2,500 | 106.50 |
Operating Conditions & Fluid Compatibility
| Operating Parameter | Specification | Recommendation & Limits |
|---|---|---|
| Hydraulic fluid type | Mineral oil-based hydraulic fluids | HL or HLP hydraulic oils to ISO 6743/4; DIN 51524 Class 1 and 2 |
| Fluid operating viscosity | 12 to 100 mm²/s (cSt) | Optimal operating viscosity range: 20 to 80 mm²/s (cSt) |
| Max. cold starting viscosity | Up to 1,000 mm²/s (cSt) | Short duration cold start at low speed without excessive load |
| Fluid operating temperature | -20 °C to +85 °C (-4 °F to +185 °F) | Standard NBR seals; Viton (FKM) seals required for +85 °C to +110 °C |
| Inlet suction line pressure | 0.7 to 3.0 bar absolute (10 to 44 psia) | Minimum suction line absolute pressure 0.7 bar (avoid cavitation) |
| Fluid cleanliness level | Class 20/18/15 to ISO 4406 | Recommended filtration: β25 ≥ 75 on return/suction circuit |
Advantages — HENGYUHANG Group 3PDF 4-Hole Rectangular Series
Direct European 4-Bolt OEM Drop-In Interchangeability
Precision-machined to standard European Group 3 4-bolt rectangular mounting flange dimensions (pilot Ø 50.8 mm with 98.5 × 128.0 mm bolt pitch), 1:8 tapered drive shafts (T6), and M10 flanged port centerlines, enabling immediate 1:1 drop-in replacement across 39 leading global manufacturers.
Superior High-Flow Fluid Power Delivery
Capable of generating up to 106.5 l/min at 1500 r/min (displacements up to 71 cm³/rev), providing massive hydraulic muscle for heavy mobile construction machinery and intensive industrial manufacturing systems.
High Continuous Pressure Resilience
High-strength extruded aluminum alloy body reinforced with heavy-duty spheroidal ductile cast-iron or aluminum end covers prevents casing barrel dilation under continuous operating pressures up to 250 bar (3,625 psi).
Outstanding Volumetric Efficiency (>94%)
Hydrostatic floating pressure balance thrust plates automatically compensate for wear and thermal clearance changes, sustaining peak flow output and minimizing internal slip over thousands of operating hours.
Low Acoustic Emission & Pulsation
Precision-shaved, case-hardened alloy steel gear profiles minimize fluid trapping and pressure pulsation, ensuring ultra-quiet operation in mobile machinery cabins and indoor industrial plants.
Flexible Port & Valve Customization
Readily configured with European 4-bolt rectangular flanged ports (M10), BSPP cylindrical threaded ports, SAE straight-thread O-ring boss ports, or integrated relief valves tailored to bespoke customer requirements.
Reference — HENGYUHANG Group 3PDF 4-Hole Rectangular Series
Series Architecture Across Group 3PDF 4-Hole Rectangular Series
The HENGYUHANG Group 3PDF 4-Hole Rectangular family covers 11 standardized displacements, ensuring optimal hydraulic matching:
Intermediate High-Pressure Range (20.0 – 26.0 cm³/rev): 3PDF-20, 3PDF-22, 3PDF-26
Mid-to-High Displacement Work-Horse Range (33.0 – 46.0 cm³/rev): 3PDF-33, 3PDF-39, 3PDF-46
Heavy-Duty High-Flow Output Range (50.0 – 71.0 cm³/rev): 3PDF-50, 3PDF-52, 3PDF-55, 3PDF-63, 3PDF-71
Comprehensive Interchangeability Matrix Across 39 Brands
The HENGYUHANG Group 3PDF 4-Hole Rectangular Series provides proven mechanical, mounting, and hydraulic drop-in substitution for the following 39 international manufacturers:
ARGO-HYTOS: GP3 Series 4-bolt rectangular external gear pumps
ASEDA: Group 3 European 4-bolt tractor implement gear pumps
ATOS: PFG-3 / PFE series 4-bolt external gear pumps
B&C Hydraulics: GR3 series 4-bolt compact gear pumps
BLUEASCEND: Group 3 4-bolt aluminum gear pumps for mobile machinery
Boden: Boden B3 / BG3 4-bolt hydraulic gear pumps
BONDIOLI & PAVESI: HPLP Series Group 3 4-bolt gear pumps (HP3, HPL3)
Brevini Fluid Power (Dana Brevini): OT300 / B300 series 4-bolt heavy-duty pumps
BUCHER Hydraulics: AP300 / QX3 series 4-bolt high-pressure gear pumps
Caproni: 30A / 30C / Group 3 4-bolt hydraulic gear pumps
CASAPPA: POLARIS Group 3 (PLP30 4-bolt rectangular flange, 3PDF, PL30) gear pumps
CONCENTRIC (Haldex): W1200 / W1500 Group 3 4-bolt external pumps
DANFOSS Power Solutions: SNP3NN / SNW3NN Turolla D Series 4-bolt Group 3 pumps
DUPLOMATIC: IGP3 / GP3 series 4-bolt external gear pumps
Galtech: 3SPA / 3GPA series 4-bolt heavy-duty gear pumps
GRH Hydraulics: 3PF series 4-bolt aluminum gear pumps
HANSA-TMP: Group 3 4-bolt gear pumps and power pack units
HESPER: Group 3 4-bolt mobile hydraulic gear pumps
HIDRAULICA: Group 3 4-bolt external gear pumps
HONOR Gear Pumps: Group 3 4-bolt series pumps
HPI (Hydraulique Professionnelle Industrielle): Series M3 / P3 4-bolt gear pumps
HYDAC: PGE103 series 4-bolt external gear pumps
HYDROMAX: Group 3 4-bolt external hydraulic gear pumps
HYDRONIT: Group 3 4-bolt heavy power pack central block gear pumps
JIHOSTROJ: J3 / Q3 Series Group 3 4-bolt hydraulic gear pumps
JOYANG: Group 3 4-bolt gear pumps for material handling
KOMPASS: Group 3 4-bolt industrial gear pumps
KRACHT: KF 3 / KP 3 series 4-bolt high-performance gear pumps
MARZOCCHI: ALP3 / GHP3 series 4-bolt high-pressure gear pumps
MetaHydra: Group 3 4-bolt custom gear pumps
PARKER Hannifin: PGP517 / PGP620 Series 4-bolt Group 3 gear pumps
REXPOWER: Group 3 4-bolt external gear pumps
Bosch Rexroth: AZPF / AZPG Series 4-bolt European Group 3 gear pumps
REXROTH-SIGMA: Sigma Group 3 4-bolt gear pumps
RONZIO: 03ZBG 03ZAG Series Group 3 4-bolt high-pressure gear pumps
ROQUET: 1PL / 1PLM Series Group 3 4-bolt external gear pumps
SALAMI: 3PB / 3PE series 4-bolt heavy-duty gear pumps
SDH (Shengda Hydraulics): Group 3 4-bolt gear pumps
VIVOLO (Vivoil): X3P / XV-3P Series Group 3 4-bolt gear pumps
7. Brand Replacement
Quanzhou Hengyuhang Power Technology Co., Ltd. manufactures the Group 3PDF 4-Hole Rectangular Series conforming to international OEM European Group 3 4-bolt rectangular mounting standards. Every manufactured pump undergoes 100% end-of-line verification, including volumetric efficiency benchmarking, continuous rated pressure testing, and port thread gauge inspection. Equipment operators and hydraulic distributors can replace worn or discontinued original pumps from CASAPPA, Rexroth, MARZOCCHI, PARKER, and DANFOSS with zero alterations to existing bell housings, electric motor couplings, or hydraulic plumbing. Custom batch manufacturing with specialized drive shafts, special flange spigots, or integrated relief valves is fully supported.
8. Applications of HENGYUHANG Group 3PDF 4-Hole Rectangular Series
Mobile Construction Machinery: Large excavators, heavy-duty wheel loaders, motor graders, crawler bulldozers, vibratory soil compactors, and hydraulic drilling rigs requiring rigid 4-bolt bell-housing mounting.
Agricultural Equipment: High-horsepower articulated tractors, combine harvesters, self-propelled forage harvesters, large square balers, and forestry timber loaders.
Material Handling & Port Equipment: Heavy container handlers, reach stackers, rough-terrain forklifts, mobile harbor cranes, and truck-mounted telescopic cranes.
Stationary Industrial Hydraulic Power Units (HPUs): Heavy metal forming hydraulic presses, scrap metal compactors, injection molding machines, automated extrusion lines, and heavy foundry equipment.
Municipal & Specialty Vehicles: Large waste compactor trucks, municipal snow plows, vacuum sweeper high-flow hydraulic drives, and marine winch/deck machinery systems.
9. Package & Shipping
| Item | Details |
|---|---|
| Packaging | Neutral heavy-duty export carton with internal molded foam suspension; individual moisture-resistant sealed VCI polybags; export standard fumigation-free wooden pallets for batch consignments. |
| Selling Unit | Single item (MOQ: 1 piece for standard models; low MOQ for customized OEM configurations). |
| Single Package Size | 32.0 × 22.0 × 20.0 cm (12.60 × 8.66 × 7.87 in) per pump. |
| Single Gross Weight | 8.50 to 12.80 kg (18.74 to 28.22 lbs) depending on displacement and flange material. |
| Standard Lead Time | 3–7 business days for stock items; 15–20 business days for volume OEM batch customization. |
| Logistics & Express | Air express (DHL, FedEx, UPS, TNT), air freight, sea freight (FCL / LCL), and multimodal door-to-door DDP services worldwide. |
| Customization Services | Custom nameplate laser engraving, private labeling, custom drive shafts, integrated valves, and bespoke flange geometries. |
| Warranty & Support | 12 months comprehensive warranty from dispatch date; full lifetime technical support. |
10. Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence: Equipped with multi-axis CNC machining centers, high-precision gear hobbing machines, and automated micro-honing lines, Hengyuhang maintains sub-micron dimensional tolerances (Ra < 0.2 μm) on all internal gear teeth, journals, and housing cavities. This guarantees minimal internal friction, ultra-low hydraulic pulsation, and repeatable performance across high-volume production batches.
100% Full-Cycle Multi-Parameter Factory Inspection: Every single hydraulic pump undergoes rigorous end-of-line digital testing before dispatch. Quality checks cover full continuous rated and peak pressure hold, internal bypass leakage verification, high/low temperature volumetric efficiency testing (>94%), and acoustic noise spectrum profiling, ensuring zero-defect delivery to global OEM assembly lines.
Seamless 1:1 OEM Drop-In Interchangeability: Conforming precisely to international European standard, SAE ("AA", "A", "B", "C"), and DIN/ISO mounting configurations, our pumps deliver genuine plug-and-play replacement for over 39 leading global manufacturers. Machine operators and distributors can replace original units without modifying bell housings, drive couplings, or hydraulic line geometry, drastically reducing costly machine downtime.
Flexible Engineering Customization & Rapid Prototyping: Backed by an experienced in-house hydraulic engineering team, Hengyuhang offers comprehensive bespoke customization, including non-standard 4PTF/6PTF mounting flanges, special shaft tapers or splines, dual port configurations, and integrated relief or priority flow control valves. We support low-MOQ trial orders and agile custom prototyping to resolve obsolescence issues for out-of-production machinery.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: With dedicated raw material casting facilities, high-strength extruded aluminum alloy reserves, and extensive finished inventory across Group 0, Group 1, Group 2, and Group 3 platforms, standard orders ship within 48 to 72 hours. We partner strategically with major international logistics carriers (DHL, FedEx, UPS, air/ocean freight) to provide seamless door-to-door DDP global delivery.
12-Month Comprehensive Warranty & Lifetime Technical Support: All Hengyuhang hydraulic pumps are backed by a complete 12-month factory warranty and dedicated lifetime technical assistance. Our specialized fluid power engineers provide free 24-hour CAD drawing verification, OEM cross-reference confirmation, hydraulic displacement calculations, and system troubleshooting to ensure total operational peace of mind.
External Hydraulic Gear Pump Group 3PDF 20CC–71CC (4-Hole Rectangular Series) is a heavy-duty, high-flow external hydraulic gear pump engineered for demanding mobile machinery and industrial hydraulic power units. Built with an extruded high-strength aluminium alloy casing, high-tensile alloy steel precision-ground gear pairs, and pressure-balanced DU composite anti-friction thrust plates, this series delivers 11 displacement ratings from 20 to 71 cm³/rev. It supports continuous working pressures (P1) up to 250 bar (peak pressure up to 280 bar) and operating speeds up to 3500 r/min. Featuring a European standard 4-bolt rectangular mounting flange (T6, 98.5 × 128 mm bolt centers with Ø50.8 mm centering pilot), an industry-standard 1:8 taper drive shaft (M14×1.5), robust M10 4-bolt flanged inlet and outlet ports, and an available bidirectional hydraulic motor variant (3PDM-R*T6 with G3/8 rear case drain), the Group 3PDF series offers superior volumetric efficiency, excellent mechanical resistance under severe duty cycles, and quiet running operation.
| Applications
The Group 3PDF 4-hole rectangular series is extensively utilized in medium and heavy mobile equipment and industrial installations, including large agricultural tractors, combine harvesters, forestry machines, wheel loaders, medium-sized excavators, backhoe loaders, articulated dump trucks, mobile drilling rigs, waste compaction trucks, heavy truck-mounted cranes, hook loaders, marine winches, and stationary hydraulic power packs requiring high delivery flow, continuous high pressure, and reliable 4-bolt rectangular mounting rigidity.
| Key Specifications Overview
| Parameter | Specification |
|---|---|
| Series | Group 3PDF Series (Standard Pump 3PDF-D*T6 & Motor 3PDM-R*T6) |
| Displacement Range | 20 ~ 71 cm³/rev (11 standard sizes: 20, 22, 26, 33, 39, 46, 50, 52, 55, 63, 71 cm³/rev) |
| Continuous Operating Pressure (P1) | 180 ~ 250 bar (250 bar for 20~26 cc; 230 bar for 33~46 cc; 220 bar for 50~52 cc; 200 bar for 55~63 cc; 180 bar for 71 cc) |
| Intermittent Operating Pressure (P2) | 200 ~ 265 bar (265 bar for 20~26 cc; 250 bar for 33~46 cc; 240 bar for 50~52 cc; 230 bar for 55~63 cc; 200 bar for 71 cc) |
| Max. Peak Pressure (P3) | 220 ~ 280 bar (280 bar for 20~26 cc; 270 bar for 33~46 cc; 260 bar for 50~52 cc; 250 bar for 55~63 cc; 220 bar for 71 cc) |
| Rotational Speed Range | 400 ~ 3500 r/min (displacement dependent; up to 3500 r/min for 20~22 cc) |
| Housing Construction | Extruded high-tensile aluminium alloy casing with rigid cast iron front and rear end covers |
| Mounting Flange | T6 European 4-bolt rectangular pattern (122 × 152 mm, 98.5 × 128 mm bolt centers, Ø50.8 mm pilot, 4 × Ø11 mm holes) |
| Drive Shaft | 1:8 Taper shaft (M14×1.5 thread, 4 mm woodruff key, Ø19 mm taper base, 47 mm total extension) |
| Port Connections | European 4-bolt flanged ports with M10 threads on both inlet and outlet |
| Hydraulic Motor Variant | 3PDM-R*T6 bidirectional motor with integrated G3/8 external case drain port on rear cover |
| Rotation Direction | Clockwise (D) standard / Counter-clockwise (S) optional / Bidirectional (motor) |
| Hydraulic Fluid | Mineral-based hydraulic oil (ISO VG 46 / HLP) |
| Operating Temperature Range | -20°C to +80°C (standard NBR seals) |
| Technical Parameters & Performance Ratings (Group 3PDF-D*T6)
| Type / Model | Displacement (cm³/rev) | Max. Pressure (bar) | Max. Speed (r/min) | Min. Speed (r/min) | Body Dimensions (mm) | Inlet Flange (mm) | Outlet Flange (mm) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| P1 (Cont.) | P2 (Int.) | P3 (Peak) | M | L | B | D | b | d | ||||
| 3PDF-20-D*T6 | 20.0 | 250 | 265 | 280 | 3500 | 600 | 128.0 | 63.0 | 56 | 27 | 56 | 19 |
| 3PDF-22-D*T6 | 22.0 | 250 | 265 | 280 | 3500 | 600 | 130.0 | 64.0 | 56 | 27 | 56 | 19 |
| 3PDF-26-D*T6 | 26.0 | 250 | 265 | 280 | 3000 | 600 | 133.0 | 65.0 | 56 | 27 | 56 | 19 |
| 3PDF-33-D*T6 | 33.0 | 230 | 250 | 270 | 3000 | 500 | 139.0 | 68.0 | 56 | 27 | 56 | 19 |
| 3PDF-39-D*T6 | 39.0 | 230 | 250 | 270 | 3000 | 500 | 146.0 | 72.0 | 56 | 27 | 56 | 19 |
| 3PDF-46-D*T6 | 46.0 | 230 | 250 | 270 | 3000 | 500 | 152.0 | 75.0 | 51 | 27 | 51 | 27 |
| 3PDF-50-D*T6 | 50.0 | 220 | 240 | 260 | 3000 | 500 | 156.0 | 77.0 | 56 | 27 | 56 | 27 |
| 3PDF-52-D*T6 | 52.0 | 220 | 240 | 260 | 3000 | 500 | 158.0 | 78.0 | 56 | 27 | 56 | 27 |
| 3PDF-55-D*T6 | 55.0 | 200 | 230 | 250 | 2800 | 400 | 160.0 | 79.0 | 62 | 33 | 51 | 27 |
| 3PDF-63-D*T6 | 63.0 | 200 | 230 | 250 | 2800 | 400 | 168.0 | 83.0 | 62 | 33 | 51 | 27 |
| 3PDF-71-D*T6 | 71.0 | 180 | 200 | 220 | 2500 | 400 | 175.0 | 86.0 | 62 | 33 | 51 | 27 |
| Mounting Flange, Shaft & Motor Configurations
| Configuration Code | Mounting Interface & Pilot | Drive Shaft Specification | Port Connections & Features |
|---|---|---|---|
| 3PDF-...-D*T6 | European 4-bolt rectangular flange 122 × 152 mm (98.5 × 128 mm bolt centers, Ø50.8 mm pilot, 4 × Ø11 mm holes) | 1:8 Taper shaft (M14×1.5 thread, 4 mm woodruff key, Ø19 mm taper base, 47 mm length) | European 4-bolt flanged ports with M10 threads (standard pump configuration) |
| 3PDM-...-R*T6 | European 4-bolt rectangular flange 122 × 152 mm (98.5 × 128 mm bolt centers, Ø50.8 mm pilot, 4 × Ø11 mm holes) | 1:8 Taper shaft (M14×1.5 thread, 4 mm woodruff key, Ø19 mm taper base, 47 mm length) | Bidirectional flanged ports with G3/8 external case drain port on rear cover (hydraulic motor variant) |
HENGYUHANG 3PDF / 3PDM Series — Complete Model List
3PDF Series — Type D*R4
| Type |
|---|
| 3PDF-20-D*R4 |
| 3PDF-22-D*R4 |
| 3PDF-26-D*R4 |
| 3PDF-33-D*R4 |
| 3PDF-39-D*R4 |
| 3PDF-46-D*R4 |
| 3PDF-50-D*R4 |
| 3PDF-52-D*R4 |
| 3PDF-55-D*R4 |
| 3PDF-63-D*R4 |
| 3PDF-71-D*R4 |
3PDF Series — Type D*R5
| Type |
|---|
| 3PDF-20-D*R5 |
| 3PDF-25-D*R5 |
| 3PDF-32-D*R5 |
| 3PDF-40-D*R5 |
| 3PDF-50-D*R5 |
| 3PDF-63-D*R5 |
3PDM Series — Type R*T6
| Type |
|---|
| 3PDM-20-R*T6 |
| 3PDM-22-R*T6 |
| 3PDM-26-R*T6 |
| 3PDM-33-R*T6 |
| 3PDM-39-R*T6 |
| 3PDM-46-R*T6 |
| 3PDM-50-R*T6 |
| 3PDM-52-R*T6 |
| 3PDM-55-R*T6 |
| 3PDM-63-R*T6 |
| 3PDM-71-R*T6 |
3PDF Series — Type D*O1
| Type |
|---|
| 3PDF-20-D*O1 |
| 3PDF-22-D*O1 |
| 3PDF-26-D*O1 |
| 3PDF-33-D*O1 |
| 3PDF-39-D*O1 |
| 3PDF-46-D*O1 |
| 3PDF-50-D*O1 |
| 3PDF-52-D*O1 |
| 3PDF-55-D*O1 |
| 3PDF-63-D*O1 |
| 3PDF-71-D*O1 |
3PDF Series — Type D*T6
| Type |
|---|
| 3PDF-20-D*T6 |
| 3PDF-22-D*T6 |
| 3PDF-26-D*T6 |
| 3PDF-33-D*T6 |
| 3PDF-39-D*T6 |
| 3PDF-46-D*T6 |
| 3PDF-50-D*T6 |
| 3PDF-52-D*T6 |
| 3PDF-55-D*T6 |
| 3PDF-63-D*T6 |
| 3PDF-71-D*T6 |
WhatsApp
Email
+86 19918575358
