Gear pump
Multi-stage pump Internal Hydraulic Gear Pump 2APHF SAE A 2-Bolt Oval Flange Series_复制
Engineered with active radial and axial gap pressure compensation and precision internal conjugate gear profiles, the HENGYUHANG PHF multi-stage internal hydraulic gear pump family delivers whisper-quiet, virtually pulsation-free fluid power across four standardized frame sizes with continuous operating pressures up to 300 bar and peak pressures reaching 330 bar (4,785 psi / 33 MPa).
| Applications
Engineered for energy-efficient variable-speed servo motor and industrial hydraulic drive systems, this multi-stage internal gear pump series powers high-precision plastic injection molding machines, CNC hydraulic press brakes, die-casting machinery, and automated machine tool power packs. Its standardized SAE 2-bolt oval mounting flanges (SAE A, SAE B, SAE C, and SAE D) enable seamless multi-circuit tandem configurations and 1:1 OEM mechanical drop-in replacement across premier European internal gear pump installations.
| Key Technical Specifications
Product Model: Hengyuhang Multi-Stage Internal Hydraulic Gear Pump PHF 2-Bolt Oval Flange Series (2PHF / 3PHF / 4PHF / 5PHF)
Brand Replacement: ECKERLE (EIPH/EIPC), HOERBIGER (HQI), HYDAC (PGI) OEM or as requested.
Displacement: 4.2 to 160.1 cm³/rev across 4 frame sizes (2PHF: 4.2–25.2, 3PHF: 24.8–63.1, 4PHF: 65.3–100.5, 5PHF: 80.0–160.1 cm³/rev)
Rotation Direction: Clockwise (R / D), counter-clockwise (L / S)
Speed Range: Min. speed 100 to 200 r/min; Max. speed 1800 to 3000 r/min
Peak Pressure: 21 to 33 MPa (210 to 330 bar / 3,045 to 4,785 psi)
- Description
- Tecspecs
- Brand & Reference
- Download HENGYUHANG PHF Internal Hydraulic Gear Pump PDF
- Send an Inquiry
| Overview of HENGYUHANG PHF Series
The HENGYUHANG PHF Series represents a comprehensive modular platform of high-pressure, ultra-low-noise internal gear fluid power engineering. Spanning four progressive frame sizes—2PHF (Group 2 with SAE A 2-bolt flange), 3PHF (Group 3 with SAE B 2-bolt flange), 4PHF (Group 4 with SAE C 2-bolt flange), and 5PHF (Group 5 with SAE D 2-bolt flange)—the family provides continuous fluid delivery from 4.2 cm³/rev up to 160.1 cm³/rev across 24 standardized displacement sizes. Each pump is constructed with high-strength ductile cast iron bodies, internal straight-cut conjugate gear profiles, and precision crescent fluid dividers. Dual radial and axial gap pressure compensation elements dynamically counteract pressure-induced micro-deflections and thermal variations, sustaining volumetric and mechanical efficiencies up to 93% across fluctuating operating pressures and oil viscosities.
Engineered for variable-speed servo-electric drive compatibility, the PHF family maintains smooth, pulsation-free pressure and volume delivery down to 100–200 r/min while supporting continuous operating pressures up to 30 MPa (300 bar / 4,350 psi) and peak spike pressures up to 33 MPa (330 bar / 4,785 psi). Operating sound levels remain quiet, ranging from 53 dB(A) on 2PHF units up to 77 dB(A) on high-flow 5PHF units. Equipped with standardized SAE 2-bolt oval mounting flanges, standardized cylindrical keyed or involute splined drive shafts, and multi-stage through-drive internal couplings, the HENGYUHANG PHF series provides 1:1 drop-in interchangeability for ECKERLE EIPH / EIPC series, HOERBIGER HQI2 / HQI3, and HYDAC PGI100 / PGI101 / PGI102 series without requiring piping rework or bell-housing modifications.
| Dimension of HENGYUHANG PHF Series
| Interface Data Needed with the Drawing Across 4 Frame Sizes
| Frame Size | Mounting Flange Specification | Drive Shaft Options | Suction Port (Inlet S) | Pressure Port (Outlet P) | Tightening Torques |
|---|---|---|---|---|---|
| 2PHF (4.2 – 25.2 cm³/rev) | SAE "A" 2-bolt oval flange (pilot Ø 82.55 -0.05 mm / 3.25 in, 6 mm pilot depth; 106.4 mm / 4.189 in bolt centers, flange width 130 mm) | 1. Cylindrical keyed: Ø 20.0 -0.007 / -0.020 mm with 6.0 mm key, 41 mm extension; 2. Involute spline: SAE 16/32-13T or SAE 16/32-10T | 4-bolt flanged port: pitch C = 40 mm (M6 depth 15 mm) for 04 – 16; pitch C = 52.4 mm (M10 depth 17 mm) for 19 – 25 | 4-bolt flanged port: central bore Ø 14 mm with pitch 38.1 × 17.5 mm, 4-M8 threads depth 15 mm | Flange bolt: 60 ± 5 N·m; Body tie-rod: 45 ± 3 N·m |
| 3PHF (24.8 – 63.1 cm³/rev) | SAE "B" 2-bolt oval flange (pilot Ø 101.6 -0.05 mm / 4.0 in, 6 mm pilot depth; 146.0 mm / 5.75 in bolt centers, flange width 170 mm) | 1. Cylindrical keyed: Ø 25.0 -0.007 / -0.020 mm with 8.0 mm key, 46 mm extension; 2. Involute spline: SAE 16/32-15T | 4-bolt flanged port: central bore Ø 32 mm with 58.7 × 30.2 mm pitch, 4-M10 threads depth 17 mm | 4-bolt flanged port: central bore Ø 18, 20, 25.4 mm with pitch 47.5 × 22 mm or 52.4 × 26.2 mm, 4-M10 depth 17 mm | Flange bolt: 100 ± 8 N·m; Body tie-rod: 85 ± 5 N·m |
| 4PHF (65.3 – 100.5 cm³/rev) | SAE "C" 2-bolt oval flange (pilot Ø 127.0 -0.05 mm / 5.0 in, 6 mm pilot depth; 181.0 mm / 7.126 in bolt centers, flange width 208 mm) | 1. Cylindrical keyed: Ø 32.0 -0.009 / -0.034 mm with 10.0 mm key, 56 mm extension; 2. Involute spline: SAE 12/24-14T | 4-bolt flanged port: central bore Ø 47.2, 63.5 mm with pitch 77.8 × 42.9 mm or 88.9 × 50.8 mm, 4-M12/M14 threads | 4-bolt flanged port: central bore Ø 25.4, 31.8 mm with pitch 57.2 × 27.8 mm (M12) or 66.7 × 31.8 mm (M14) | Flange bolt: 180 ± 12 N·m; Body tie-rod: 140 ± 8 N·m |
| 5PHF (80.0 – 160.1 cm³/rev) | SAE "D" 2-bolt oval flange (pilot Ø 152.4 -0.05 mm / 6.0 in, 9 mm pilot depth; 228.6 mm / 9.0 in bolt centers, flange width 263 mm) | 1. Cylindrical keyed: Ø 40.0 -0.009 / -0.034 mm with 12.0 mm key, 70 mm extension; 2. Involute spline: SAE 12/24-17T | 4-bolt flanged port: central bore Ø 50, 63.5, 76.2 mm with pitch L × M, 4-M12/M16 threads depth 22 – 25 mm | 4-bolt flanged port: central bore Ø 31.8, 38.1 mm with pitch 69.9 × 35.7 mm (M12) or 79.4 × 36.5 mm (M16) | Flange bolt: 280 ± 15 N·m; Body tie-rod: 220 ± 12 N·m |
Note: Flexible coupling transmission required; pure torsional torque only; coaxiality alignment must be within 0.1 mm.
| Pump Installation Specifications HENGYUHANG PHF Series
| Comprehensive Ordering Code Breakdown (Hengyuhang PHF Series Structure)
Code structure — reference: [Frame]PHF−D1/D2−R−S−C−P−M−T
| Code Position | Meaning & Available Values |
|---|---|
| [Frame]PHF | Frame size designation (2PHF = SAE A; 3PHF = SAE B; 4PHF = SAE C; 5PHF = SAE D) |
| D1 (Front Stage Displacement) | Displacement rating per frame size table |
| D2 (Rear Stage Displacement) | Optional secondary stage displacement for tandem multi-stage pumps (same or smaller frame size) |
| R (Rotation Direction) | R = Clockwise (viewed from shaft end); L = Counter-clockwise |
| S (Drive Shaft Code) | K = Cylindrical keyed shaft; S = SAE standard involute splined shaft |
| C (Mounting Flange) | A2 = SAE A 2-bolt; B2 = SAE B 2-bolt; C2 = SAE C 2-bolt; D2 = SAE D 2-bolt oval flange |
| P (Port Configuration) | F1 = Metric 4-bolt flanged ports (standard); G1 = Threaded BSPP / SAE straight thread O-ring ports |
| M (Seals Compound) | N = NBR Buna-N (-20 °C to +80 °C); V = FKM Viton (-10 °C to +150 °C) |
| T (Assembly Configuration) | S = Single pump; D = Tandem double pump; T = Triple multi-stage combination |
| Reading Your Replacement Code
| Code Segment | Example Value | Meaning & Configuration |
|---|---|---|
| Series & Frame | 3PHF-40 | Group 3 internal gear pump (40.1 cm³/rev) with SAE B 2-bolt oval flange |
| Tandem Model | 3PHF+2PHF-40/16 | Multi-stage tandem: Front 3PHF (40.1 cc) + Rear 2PHF (15.8 cc) |
| Rotation | R | Clockwise rotation when looking at drive shaft end |
| Drive Shaft | K | Cylindrical keyed shaft matching frame standard |
| Mounting Flange | B2 | Standard SAE B 2-bolt oval mounting flange (pilot Ø 101.6 mm, 146.0 mm bolt centers) |
| Ports | F1 | Metric 4-bolt flanged suction and pressure ports |
| Seals | N | Nitrile butadiene rubber (NBR) hydraulic seals |
| Techspecs of HENGYUHANG PHF Series
| 4.1 2PHF Series Technical Data (SAE A 2-Bolt Flange, 4.2 – 25.2 cm³/rev)
| Model Code | Theoretical Displacement (cm³/rev) | Rated Pressure (MPa / bar) | Peak Pressure (MPa / bar) | Speed Range (r/min) | Volumetric Eff. (%) | Noise Level @ 1450 rpm, 25 MPa (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 2PHF-04 | 4.2 | 28 / 280 | 32 / 320 | 200 – 3,000 | 88 | 53 | 2.9 |
| 2PHF-05 | 5.4 | 28 / 280 | 32 / 320 | 200 – 3,000 | 91 | 53 | 2.9 |
| 2PHF-06 | 6.4 | 28 / 280 | 32 / 320 | 200 – 3,000 | 92 | 54 | 3.0 |
| 2PHF-08 | 7.9 | 28 / 280 | 32 / 320 | 200 – 3,000 | 92 | 55 | 3.1 |
| 2PHF-11 | 10.9 | 28 / 280 | 32 / 320 | 200 – 3,000 | 92 | 56 | 3.3 |
| 2PHF-13 | 13.3 | 28 / 280 | 32 / 320 | 200 – 3,000 | 92 | 57 | 3.5 |
| 2PHF-16 | 15.8 | 28 / 280 | 32 / 320 | 200 – 3,000 | 92 | 58 | 3.6 |
| 2PHF-19 | 19.3 | 28 / 280 | 30 / 300 | 200 – 2,800 | 93 | 58 | 3.8 |
| 2PHF-20 | 20.1 | 25 / 250 | 30 / 300 | 200 – 2,800 | 93 | 59 | 4.0 |
| 2PHF-22 | 22.2 | 25 / 250 | 30 / 300 | 200 – 2,800 | 93 | 59 | 4.0 |
| 2PHF-25 | 25.2 | 25 / 250 | 28 / 280 | 200 – 2,500 | 93 | 60 | 4.2 |
| 4.2 3PHF Series Technical Data (SAE B 2-Bolt Flange, 24.8 – 63.1 cm³/rev)
| Model Code | Theoretical Displacement (cm³/rev) | Rated Pressure (MPa / bar) | Peak Pressure (MPa / bar) | Speed Range (r/min) | Volumetric Eff. (%) | Noise Level @ 1450 rpm, 25 MPa (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 3PHF-25 | 24.8 | 25 / 250 | 32 / 320 | 200 – 3,000 | 92 | 63 | 8.6 |
| 3PHF-32 | 32.1 | 25 / 250 | 32 / 320 | 200 – 3,000 | 92 | 64 | 9.2 |
| 3PHF-40 | 40.1 | 25 / 250 | 30 / 300 | 100 – 2,500 | 93 | 65 | 9.8 |
| 3PHF-50 | 50.3 | 25 / 250 | 28 / 280 | 100 – 2,200 | 93 | 66 | 10.5 |
| 3PHF-63 | 63.1 | 18 / 180 | 21 / 210 | 100 – 1,800 | 93 | 64* | 11.2 |
Note: 3PHF-63 noise measured at Δp = 18 MPa.
| 4.3 4PHF Series Technical Data (SAE C 2-Bolt Flange, 65.3 – 100.5 cm³/rev)
| Model Code | Theoretical Displacement (cm³/rev) | Rated Pressure (MPa / bar) | Peak Pressure (MPa / bar) | Speed Range (r/min) | Volumetric Eff. (%) | Noise Level @ 1450 rpm, 25 MPa (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 4PHF-64 | 65.3 | 25 / 250 | 30 / 300 | 100 – 3,000 | 92 | 67 | 11.5 |
| 4PHF-80 | 80.4 | 25 / 250 | 30 / 300 | 100 – 3,000 | 93 | 68 | 13.0 |
| 4PHF-100 | 100.5 | 23 / 230 | 28 / 280 | 100 – 2,500 | 93 | 69 | 13.5 |
| 4.4 5PHF Series Technical Data (SAE D 2-Bolt Flange, 80.0 – 160.1 cm³/rev)
| Model Code | Theoretical Displacement (cm³/rev) | Rated Pressure (MPa / bar) | Peak Pressure (MPa / bar) | Speed Range (r/min) | Volumetric Eff. (%) | Noise Level @ 1450 rpm, 25 MPa (dB) | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 5PHF-80 | 80.0 | 30 / 300 | 33 / 330 | 200 – 2,500 | 91 | 75 | 47.0 |
| 5PHF-100 | 101.2 | 30 / 300 | 33 / 330 | 200 – 2,500 | 92 | 76 | 50.0 |
| 5PHF-125 | 125.7 | 30 / 300 | 33 / 330 | 200 – 2,500 | 92 | 76 | 54.0 |
| 5PHF-145 | 145.3 | 25 / 250 | 28 / 280 | 200 – 2,000 | 93 | 77 | 57.0 |
| 5PHF-160 | 160.1 | 25 / 250 | 28 / 280 | 200 – 2,000 | 93 | 77 | 60.0 |
| 4.5 General Operating Conditions & Fluid Compatibility
| Parameter | Permissible Operating Range | Recommended Optimal Target |
|---|---|---|
| Hydraulic Fluid | Mineral oil-based hydraulic fluids (HL / HLP to DIN 51524) | High-performance anti-wear hydraulic oil |
| Operating Viscosity | 10 to 300 mm²/s (cSt) | 20 to 80 mm²/s (cSt) |
| Cold Start Viscosity | Up to 2000 mm²/s at cold start (p < 10 bar) | Pre-warm system before applying heavy operating loads |
| Fluid Temperature (NBR) | -20 °C to +80 °C (-4 °F to +176 °F) | +30 °C to +60 °C (+86 °F to +140 °F) |
| Fluid Temperature (FKM) | -10 °C to +150 °C (+14 °F to +302 °F) | For high-temperature or synthetic ester applications |
| Suction Inlet Pressure | 0.6 to 2.0 bar absolute (8.7 to 29.0 psi) | Recommended suction depression < 0.2 bar |
| Fluid Cleanliness Class | ISO 4406 Class 20/18/15 (NAS 1638 Class 9) | Class 19/17/14 (NAS 8) for extended service life |
Advantages
Ultra-Low Noise Acoustic Profile (53 to 77 dB)
Precision conjugate internal gear tooth profiles eliminate oil entrapment and fluid compression shocks, creating exceptionally quiet operation across all operating pressures.
Dual Radial & Axial Gap Pressure Compensation
Active floating compensation segments dynamically adjust internal running clearances as circuit pressure and oil temperature fluctuate, sustaining volumetric efficiency above 91–93% across thousands of severe duty hours.
Near-Zero Flow & Pressure Ripple at Low Speeds
Smooth internal meshing maintains stable fluid flow and pressure holding down to 100–200 r/min, making the PHF series well suited for energy-saving variable-speed servo motor drives.
Extreme Continuous Pressure up to 300 bar (Peak 330 bar)
High-density spheroidal ductile cast iron body structure eliminates housing dilation and micro-cracking under severe cyclic pressure spikes.
Versatile Multi-Stage Modular Combinations
Standardized through-drive interfaces enable single, double, or triple multi-pump assemblies (e.g., 2PHF+2PHF, 3PHF+2PHF, 4PHF+2PHF, 5PHF+3PHF) powered by a single prime mover.
Seamless 1:1 OEM Drop-In Interchangeability
Standardized SAE 2-bolt oval mounting flanges (SAE A, SAE B, SAE C, SAE D) and matching port locations provide direct mechanical interchangeability with Eckerle, Hoerbiger, and Hydac units.
Reference
Multi-Stage Architecture Across 4 Frame Sizes
2PHF Series (SAE A 2-Bolt Flange): Displacements 4.2 to 25.2 cm³/rev (11 displacement steps), pilot Ø82.55 mm, 106.4 mm centers.
3PHF Series (SAE B 2-Bolt Flange): Displacements 24.8 to 63.1 cm³/rev (5 displacement steps), pilot Ø101.6 mm, 146.0 mm centers.
4PHF Series (SAE C 2-Bolt Flange): Displacements 65.3 to 100.5 cm³/rev (3 displacement steps), pilot Ø127.0 mm, 181.0 mm centers.
5PHF Series (SAE D 2-Bolt Flange): Displacements 80.0 to 160.1 cm³/rev (5 displacement steps), pilot Ø152.4 mm, 228.6 mm centers.
Through-Drive Modular Assemblies: High-strength internal splined couplings allow multiple pump stages of identical or different frame sizes to be driven from a single shaft.
Comprehensive Interchangeability & Replacement Matrix
The HENGYUHANG PHF Series provides 1:1 drop-in replacement compatibility across the following designated international internal gear pump brands and series:
ECKERLE: EIPH2, EIPH3, EIPH5, EIPH6 Series (high-pressure heavy industrial internal gear pumps up to 330 bar)
ECKERLE: EIPC3, EIPC5, EIPC6 Series (mid-to-high pressure industrial internal gear pumps)
HOERBIGER: HQI2, HQI3 Series (high-pressure low-noise servo press brake and industrial internal gear pumps)
HYDAC: PGI100, PGI101, PGI102 Series (industrial low-noise internal gear pumps)
Brand Replacement
The HENGYUHANG PHF 2-Bolt Oval Flange Series is precision-engineered as a direct 1:1 drop-in replacement for premier European internal hydraulic gear pumps, including the complete ECKERLE EIPH (EIPH2/3/5/6) and EIPC (EIPC3/5/6) lines, HOERBIGER HQI (HQI2/3) lines, and HYDAC PGI (PGI100/101/102) lines. Every pump undergoes 100% computerized factory dynamic testing across its full speed and pressure curve to verify volumetric efficiency (>91–93%), mechanical torque transmission, pressure isolation up to 330 bar, and acoustic emission compliance. Utilizing standardized SAE 2-bolt oval flange dimensions (SAE A, B, C, D) and matching port centerline geometries, Hengyuhang pumps allow equipment manufacturers and service engineers to perform direct field replacements without piping rework, bell-housing re-machining, or servo drive recalibration. Custom multi-stage displacement combinations and shared or separate suction port arrangements are fully supported.
Applications
Plastic Injection Molding Machines: Servo-driven multi-circuit hydraulic power packs supplying independent clamping, injection, screw-drive, and core-pulling functions.
CNC Hydraulic Press Brakes & Shearing Machines: High-pressure precision ram positioning, anti-deflection crowning, and quiet pressure holding.
Die-Casting & Heavy Metal-Forming Presses: Multi-stage high-response accumulator charging and auxiliary hydraulic circuit supply.
Industrial Automation & Machine Tool HPUs: Compact, low-pulsation fluid power units for automated transfer lines, clamping fixtures, and CNC machining centers.
Testing & Laboratory Equipment: Low-noise test rigs requiring virtually pulsation-free hydraulic flow and stable low-speed operation.
Package & Shipping
| Packaging Type | Reinforced export corrugated carton with custom molded shock-absorbing foam inserts; heavy 4PHF/5PHF units packed in fumigation-free wooden cases |
|---|---|
| Port Protection | Heavy-duty threaded plastic port plugs and shaft sleeve protectors installed |
| Corrosion Prevention | External rust-preventive oil coating and vapor-corrosion inhibitor (VCI) polybag wrapping |
| Selling Unit | Single item (MOQ = 1 piece for standard models) |
| Package Dimensions | Approx. 350 × 240 × 220 mm (2PHF/3PHF) to 580 × 380 × 340 mm (4PHF/5PHF tandem units) |
| Gross Weight | Approx. 4.0 kg (compact 2PHF) up to 75.0 kg (heavy 5PHF multi-stage assemblies) |
| Standard Lead Time | 3 – 5 business days for stocked components; 15 – 25 business days for volume OEM production |
| Shipping Methods | Global express air freight (DHL / FedEx / UPS / TNT) for urgent maintenance; Sea freight / Air cargo for wholesale orders |
| OEM & Customization | Private label laser marking, customer part numbering, and custom displacement combinations 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 (Eckerle, Hoerbiger, Hydac, 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.
Multi-Stage Internal Hydraulic Gear Pump PHF 2-Bolt Oval Flange Series (2PHF SAE A / 3PHF SAE B / 4PHF SAE C / 5PHF SAE D) is a high-pressure, ultra-low-noise conjugate internal gear pump family engineered for industrial servo hydraulic systems, plastic injection molding machinery, metal press brakes, die-casting equipment, and high-precision testing machinery requiring multi-circuit hydraulic delivery with virtually zero flow ripple and minimal acoustic emission. Standardized across four frame sizes with industry-standard SAE J744 2-bolt oval mounting flanges—including Group 2 (2PHF: SAE A 2-bolt, pilot Ø82.55 mm / 3.250 in, 106.4 mm centers), Group 3 (3PHF: SAE B 2-bolt, pilot Ø101.6 mm / 4.000 in, 146.0 mm centers), Group 4 (4PHF: SAE C 2-bolt, pilot Ø127.0 mm / 5.000 in, 181.0 mm centers), and Group 5 (5PHF: SAE D 2-bolt, pilot Ø152.4 mm / 6.000 in, 228.6 mm centers)—the PHF multi-stage series enables modular double (dual) and triple (three-stage) tandem pump assemblies driven by a common high-tensile drive shaft. Built with high-strength wear-resistant cast iron bodies and hydrostatically balanced axial and radial gap compensation mechanisms, the PHF series sustains continuous operating pressures up to 300 bar (4,350 psi) and peak surge pressures up to 330 bar (4,785 psi). With 24 individual displacement ratings spanning 4.20 to 160.10 cm³/rev (0.256 to 9.770 in³/rev) per stage and combined multi-stage displacements exceeding 320 cm³/rev, the PHF series delivers individual stage flows from 6.30 to 240.15 L/min @ 1500 rpm with ultra-low noise emissions between 53 and 77 dB(A). The series is engineered for 100% direct dimensional, mechanical, and hydraulic drop-in custom replacement for premium European internal gear pumps, specifically the complete ECKERLE EIPH2 / EIPH3 / EIPH5 / EIPH6 and EIPC3 / EIPC5 / EIPC6 series, HOERBIGER HQI2 / HQI3 series, and HYDAC PGI100 / PGI101 / PGI102 series.
| Applications
The PHF SAE 2-bolt oval flange multi-stage internal hydraulic gear pump series (2PHF, 3PHF, 4PHF, 5PHF) is specifically engineered for severe-duty industrial servo hydraulics, plastics processing, and multi-axis metal forming machinery where low noise, high volumetric efficiency, and multi-circuit separation are critical:
Servo-Electric & Hybrid Plastic Injection Molding Machines: Direct-coupled to high-dynamic permanent magnet synchronous servo motors (PMSM); modular multi-stage configurations (such as PHF 4/3, 5/4, or 3/2) deliver high-flow mold clamping and differential filling on the primary stage while independently powering core-pulling, ejector rams, and proportional back-pressure circuits on the secondary stage with zero pressure crosstalk and whisper-quiet noise levels down to 53~65 dB(A).
CNC Electro-Hydraulic Servo Press Brakes and Bending Machines: Maintains stable, pulsation-free delivery down to 100~200 min⁻¹ during high-pressure holding cycles; dual independent pump circuits power the left and right Y1/Y2 synchronization cylinders with micrometer-level ram repeatability.
High-Tonnage Die-Casting & Metal Extrusion Presses: Functions as a high-low multi-circuit energy-saving unit (e.g., PHF 5/5 or 5/4); all stages combine during rapid cylinder approach, after which secondary stages unload to reservoir while the primary stage maintains sustained high locking pressure up to 300 bar.
High-Performance Machine Tools and Machining Centers: Supplies multi-stage fluid power to hydraulic spindle chucks, steady rests, and tool changers while secondary circuits feed hydro-static guideway lubrication systems without thermal build-up.
Industrial Scrap Balers, Shears, and Hydraulic Compacting Presses: Withstands severe cyclic shock loads and pressure spikes up to 330 bar; multi-stage flow combinations ensure rapid compaction cycle times and sustained final bale density.
Precision Hydraulic Component Test Rigs & Flushing Benches: Serves as a reference fluid power supply with virtually zero pressure ripple across wide viscosity ranges (10 to 300 mm²/s), ideal for testing proportional valves, servo actuators, and aircraft hydraulic assemblies.
| Key Specifications Overview
| Parameter | Specification Across 4 Modular Frame Sizes |
|---|---|
| Series Architecture | Modular High-Pressure Multi-Stage Internal Gear Pump Series (Dual & Triple Combinations of Groups 2, 3, 4, 5) |
| Group 2 (2PHF) Stage Specification | SAE A 2-Bolt Oval Flange (pilot Ø82.55 mm); 11 displacements: 4.2, 5.4, 6.4, 7.9, 10.9, 13.3, 15.8, 19.3, 20.1, 22.2, 25.2 cm³/rev |
| Group 3 (3PHF) Stage Specification | SAE B 2-Bolt Oval Flange (pilot Ø101.6 mm); 5 displacements: 24.8, 32.1, 40.1, 50.3, 63.1 cm³/rev |
| Group 4 (4PHF) Stage Specification | SAE C 2-Bolt Oval Flange (pilot Ø127.0 mm); 3 displacements: 65.3, 80.4, 100.5 cm³/rev |
| Group 5 (5PHF) Stage Specification | SAE D 2-Bolt Oval Flange (pilot Ø152.4 mm); 5 displacements: 80.0, 101.2, 125.7, 145.3, 160.1 cm³/rev |
| Total Combined Displacement Capacity | 8.40 ~ 320.20 cm³/rev (Dual-Stage: V1 + V2; Triple-Stage: V1 + V2 + V3) |
| Continuous Operating Pressure (p1) | Up to 300 bar (5PHF.80~100); 280 bar (2PHF.04~08); 250 bar (2PHF.11~25, 3PHF.25~50, 4PHF.64~80, 5PHF.125~160); 230 bar (4PHF.100); 180 bar (3PHF.63) |
| Maximum Peak Pressure (p3) | Up to 330 bar (5PHF.80~100); 320 bar (2PHF.04~08, 3PHF.25); 300 bar (2PHF.11~20, 3PHF.32, 4PHF.64); 280 bar (2PHF.22~25, 3PHF.40~50, 4PHF.80~100, 5PHF.125~160); 210 bar (3PHF.63) |
| Operational Rotational Speed Range | Minimum speed: 100 ~ 200 min⁻¹ (servo holding capability); Maximum speed: 1800 ~ 3000 min⁻¹ depending on stage size |
| Acoustic Noise Emission Range | Ultra-quiet operation: 53 ~ 77 dB(A) across the entire range @ 1450 min⁻¹, 250 bar, 1 meter distance |
| Volumetric Efficiency | 88% ~ 93% (Group 2); 92% ~ 93% (Groups 3, 4, 5) under rated continuous operating pressure |
| Hydro-Mechanical Efficiency | 88% ~ 93% across all sizes |
| Internal Compensation Technology | Patented axial floating side-plate clearance compensation and radial sealing pin gap compensation mechanism |
| Housing and Flange Construction | High-strength ductile and vermicular cast iron bodies (H option standard for severe-duty); ultra-rigid intermediate drive adapters |
| Mounting Flange Standards | SAE J744 2-Bolt Oval Flanges: SAE A (Ø82.55 mm, 106.4 mm centers), SAE B (Ø101.6 mm, 146.0 mm centers), SAE C (Ø127.0 mm, 181.0 mm centers), SAE D (Ø152.4 mm, 228.6 mm centers) |
| Drive Shaft Standards | Standard: Cylindrical straight keyed shafts (Ø20 mm on 2PHF, Ø25 mm on 3PHF, Ø32 mm on 4PHF, Ø40 mm on 5PHF); Optional: SAE ANSI B92.1 Involute Splines (16/32-13T, 16/32-15T, 12/24-14T, 12/24-17T) |
| Port Layout & Flange Standards | Standard 90° radial porting or 180° opposite inline porting (2A architecture); European standard 4-bolt split flange connections (F-01 through F-13) |
| Hydraulic Fluid Compatibility | Mineral-oil-based hydraulic fluids (HL / HLP to ISO 6743/4; DIN 51524 Part 1 and 2; VG 46~68); working viscosity: 10 ~ 300 mm²/s (cSt) |
| Operating Fluid Temperature Range | -20°C to +80°C |
| Custom Brand Replacement Compatibility | 100% direct form, fit, and function replacement for ECKERLE EIPH / EIPC, HOERBIGER HQI, and HYDAC PGI series |
| Technical Performance Matrix Across Available Stages
| Stage Model Code | Mounting Flange Standard | Displacement cm³/rev (mL/r) | Operating Pressure (bar / MPa) | Speed Range (min⁻¹) | Flow @ 1500 rpm (L/min) | Input Power @ 250 bar (kW) | Noise Level dB(A) @ 250 bar | Stage Weight (kg) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Continuous (p1) | Peak (p3) | Min. Speed | Max. Speed | |||||||
| Group 2 Series (2PHF / 2APHF) — SAE J744 SAE A 2-Bolt Oval Flange (Pilot Ø82.55 mm / 3.250 in) | ||||||||||
| 2PHF-04 | SAE A 2-Bolt | 4.20 | 280 / 28 | 320 / 32 | 200 | 3000 | 6.30 | 2.9 | 53 | 2.9 |
| 2PHF-05 | SAE A 2-Bolt | 5.40 | 280 / 28 | 320 / 32 | 200 | 3000 | 8.10 | 3.8 | 53 | 2.9 |
| 2PHF-06 | SAE A 2-Bolt | 6.40 | 280 / 28 | 320 / 32 | 200 | 3000 | 9.60 | 4.4 | 54 | 3.0 |
| 2PHF-08 | SAE A 2-Bolt | 7.90 | 280 / 28 | 320 / 32 | 200 | 3000 | 11.85 | 5.5 | 55 | 3.1 |
| 2PHF-11 | SAE A 2-Bolt | 10.90 | 250 / 25 | 300 / 30 | 200 | 2800 | 16.35 | 7.6 | 56 | 3.3 |
| 2PHF-13 | SAE A 2-Bolt | 13.30 | 250 / 25 | 300 / 30 | 200 | 2800 | 19.95 | 9.2 | 57 | 3.5 |
| 2PHF-16 | SAE A 2-Bolt | 15.80 | 250 / 25 | 300 / 30 | 200 | 2800 | 23.70 | 11.0 | 58 | 3.6 |
| 2PHF-19 | SAE A 2-Bolt | 19.30 | 250 / 25 | 300 / 30 | 200 | 2800 | 28.95 | 13.4 | 58 | 3.8 |
| 2PHF-20 | SAE A 2-Bolt | 20.10 | 250 / 25 | 300 / 30 | 200 | 2800 | 30.15 | 14.0 | 59 | 4.0 |
| 2PHF-22 | SAE A 2-Bolt | 22.20 | 250 / 25 | 280 / 28 | 200 | 2500 | 33.30 | 15.4 | 59 | 4.0 |
| 2PHF-25 | SAE A 2-Bolt | 25.20 | 250 / 25 | 280 / 28 | 200 | 2500 | 37.80 | 17.5 | 60 | 4.2 |
| Group 3 Series (3PHF) — SAE J744 SAE B 2-Bolt Oval Flange (Pilot Ø101.6 mm / 4.000 in) | ||||||||||
| 3PHF-25 | SAE B 2-Bolt | 24.80 | 250 / 25 | 320 / 32 | 200 | 3000 | 37.20 | 17.2 | 63 | 8.6 |
| 3PHF-32 | SAE B 2-Bolt | 32.10 | 250 / 25 | 300 / 30 | 100 | 2500 | 48.15 | 22.3 | 64 | 9.2 |
| 3PHF-40 | SAE B 2-Bolt | 40.10 | 250 / 25 | 280 / 28 | 100 | 2500 | 60.15 | 27.8 | 64 | 9.8 |
| 3PHF-50 | SAE B 2-Bolt | 50.30 | 250 / 25 | 280 / 28 | 100 | 2200 | 75.45 | 34.9 | 66 | 10.5 |
| 3PHF-63 | SAE B 2-Bolt | 63.10 | 180 / 18 | 210 / 21 | 100 | 1800 | 94.65 | 31.5 | 65 | 11.2 |
| Group 4 Series (4PHF) — SAE J744 SAE C 2-Bolt Oval Flange (Pilot Ø127.0 mm / 5.000 in) | ||||||||||
| 4PHF-64 | SAE C 2-Bolt | 65.30 | 250 / 25 | 300 / 30 | 100 | 3000 | 97.95 | 45.3 | 67 | 11.5 |
| 4PHF-80 | SAE C 2-Bolt | 80.40 | 250 / 25 | 280 / 28 | 100 | 2500 | 120.60 | 55.8 | 68 | 13.0 |
| 4PHF-100 | SAE C 2-Bolt | 100.50 | 230 / 23 | 280 / 28 | 100 | 2500 | 150.75 | 64.0 | 69 | 13.5 |
| Group 5 Series (5PHF) — SAE J744 SAE D 2-Bolt Oval Flange (Pilot Ø152.4 mm / 6.000 in) | ||||||||||
| 5PHF-80 | SAE D 2-Bolt | 80.00 | 300 / 30 | 330 / 33 | 200 | 2500 | 120.00 | 66.7 | 75 | 47.0 |
| 5PHF-100 | SAE D 2-Bolt | 101.20 | 300 / 30 | 330 / 33 | 200 | 2500 | 151.80 | 84.3 | 76 | 50.0 |
| 5PHF-125 | SAE D 2-Bolt | 125.70 | 250 / 25 | 280 / 28 | 200 | 2000 | 188.55 | 87.3 | 76 | 54.0 |
| 5PHF-145 | SAE D 2-Bolt | 145.30 | 250 / 25 | 280 / 28 | 200 | 2000 | 217.95 | 100.9 | 77 | 57.0 |
| 5PHF-160 | SAE D 2-Bolt | 160.10 | 250 / 25 | 280 / 28 | 200 | 2000 | 240.15 | 111.2 | 77 | 60.0 |
| Modular Multi-Stage Combination Architecture
| Combination Series | Stage Frame Pairing | Displacement Range (cm³/rev) | Mounting Interface Standard |
|---|---|---|---|
| PHF 2/2 (or 2A/2A) | Group 2 + Group 2 | 4.2~25.2 + 4.2~25.2 | SAE J744 SAE A 2-Bolt Oval (Pilot Ø82.55 mm) |
| PHF 3/2 | Group 3 + Group 2 | 24.8~63.1 + 4.2~25.2 | SAE J744 SAE B 2-Bolt Oval (Pilot Ø101.6 mm) |
| PHF 3/3 | Group 3 + Group 3 | 24.8~63.1 + 24.8~63.1 | SAE J744 SAE B 2-Bolt Oval (Pilot Ø101.6 mm) |
| PHF 4/2 | Group 4 + Group 2 | 65.3~100.5 + 4.2~25.2 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 4/3 | Group 4 + Group 3 | 65.3~100.5 + 24.8~63.1 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 4/4 | Group 4 + Group 4 | 65.3~100.5 + 65.3~100.5 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 5/4 | Group 5 + Group 4 | 80.0~160.1 + 65.3~100.5 | SAE J744 SAE D 2-Bolt Oval (Pilot Ø152.4 mm) |
| PHF 5/5 | Group 5 + Group 5 | 80.0~160.1 + 80.0~160.1 | SAE J744 SAE D 2-Bolt Oval (Pilot Ø152.4 mm) |
| PHF 4/3/3 (Triple) | Group 4 + Group 3 + Group 3 | 65.3~100.5 + 24.8~50.3 + 24.8~50.3 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 5/4/3 (Triple) | Group 5 + Group 4 + Group 3 | 80.0~160.1 + 65.3~100.5 + 24.8~50.3 | SAE J744 SAE D 2-Bolt Oval (Pilot Ø152.4 mm) |
| Mechanical Drive Guidelines and Torque Limitations
| Mechanical Parameter | Engineering Specification and Limit |
|---|---|
| Group 2 (2PHF) Primary Shaft Torque Limit | Cylindrical straight keyed shaft Ø20 mm (code 1): 140 Nm; SAE Involute Spline 16/32 DP 13T (code 2): 180 Nm; 16/32 DP 10T (code 3): 150 Nm |
| Group 3 (3PHF) Primary Shaft Torque Limit | Cylindrical straight keyed shaft Ø25 mm (code 1): 280 Nm; SAE Involute Spline 16/32 DP 15T (code 2): 350 Nm |
| Group 4 (4PHF) Primary Shaft Torque Limit | Cylindrical straight keyed shaft Ø32 mm (code 1): 500 Nm; SAE Involute Spline 12/24 DP 14T (code 2): 650 Nm |
| Group 5 (5PHF) Primary Shaft Torque Limit | Cylindrical straight keyed shaft Ø40 mm (code 1): 850 Nm; SAE Involute Spline 12/24 DP 17T (code 2): 1100 Nm |
| Intermediate Through-Drive Torque Limit | Group 2 rear stage: 110 Nm; Group 3 rear stage: 220 Nm; Group 4 rear stage: 450 Nm; Group 5 rear stage: 750 Nm |
| Cumulative Drive Torque Verification Formula | T_total = (V1 × p1) / (20 × π × η_hm) + (V2 × p2) / (20 × π × η_hm) [+ (V3 × p3) / (20 × π × η_hm)] ≤ T1_max |
| Stage Sizing and Sequencing Engineering Rule | Primary front stage displacement must always be equal to or greater than secondary rear stage displacement (V1 ≥ V2 ≥ V3) to protect through-drive spline couplings |
| Mounting Flange, Shaft and Port Details
| Series Frame | Mounting Flange Standard | Primary Drive Shaft Options | Port Interface Standards |
|---|---|---|---|
| 2PHF (Group 2) | SAE J744 SAE A 2-Bolt Oval; Centering pilot Ø82.55 0/-0.05 mm (3.250 in), depth 6.0 mm; 106.4 mm centers, 2 × Ø11.0 mm slots | Keyed Ø20 mm (code 1, key 6 mm); SAE Spline 16/32 DP 13T (code 2) or 16/32 DP 10T (code 3) | 90° radial or 180° opposite inline; Inlet F-02/F-03 (4 × M6/M8); Outlet F-01 (4 × M6) |
| 3PHF (Group 3) | SAE J744 SAE B 2-Bolt Oval; Centering pilot Ø101.6 0/-0.05 mm (4.000 in), depth 6.0 mm; 146.0 mm centers, 2 × Ø14.3 mm holes | Keyed Ø25 mm (code 1, key 8 mm); SAE Spline 16/32 DP 15T (code 2) | 90° radial; Inlet F-06/F-08/F-10 (4 × M10/M12); Outlet F-04/F-06 (4 × M8/M10) |
| 4PHF (Group 4) | SAE J744 SAE C 2-Bolt Oval; Centering pilot Ø127.0 0/-0.05 mm (5.000 in), depth 6.0 mm; 181.0 mm centers, 2 × Ø17.5 mm holes | Keyed Ø32 mm (code 1, key 10 mm); SAE Spline 12/24 DP 14T (code 2) | 90° radial; Inlet F-16/F-20 (4 × M12/M14); Outlet F-09/F-11 (4 × M12/M14) |
| 5PHF (Group 5) | SAE J744 SAE D 2-Bolt Oval; Centering pilot Ø152.4 0/-0.05 mm (6.000 in), depth 9.0 mm; 228.6 mm centers, 2 × Ø21.0 mm holes | Keyed Ø40 mm (code 1, key 12 mm); SAE Spline 12/24 DP 17T (code 2) | 90° radial; Inlet F-16/F-20/F-24 (4 × M12/M16); Outlet F-12/F-13 (4 × M14/M16) |
| Standard Interchangeability and OEM Replacement Matrix
| Hengyuhang Series | OEM Target Brand | Direct Replacement Models | Drop-In Interchangeability Characteristics |
|---|---|---|---|
| 2PHF Series | ECKERLE Hydraulics HOERBIGER HYDAC Technology | EIPH2 / EIPC2 Series (004~025) HQI2 Series (004~025) PGI100 Series (004~025) | 100% direct drop-in replacement on SAE A 2-bolt flange (Ø82.55 mm pilot), shaft key / spline profiles, porting locations, and servo operating performance. |
| 3PHF Series | ECKERLE Hydraulics HOERBIGER HYDAC Technology | EIPH3 / EIPC3 Series (025~064) HQI3 Series (025~064) PGI101 Series (025~064) | 100% direct drop-in replacement on SAE B 2-bolt flange (Ø101.6 mm pilot), shaft key / spline profiles, porting dimensions, and continuous pressure ratings. |
| 4PHF Series | ECKERLE Hydraulics HYDAC Technology | EIPH5 / EIPC5 Series (064~100) PGI102 Series (064~100) | 100% direct drop-in replacement on SAE C 2-bolt flange (Ø127.0 mm pilot), heavy shaft drive dimensions, and dual split-flange port patterns. |
| 5PHF Series | ECKERLE Hydraulics | EIPH6 / EIPC6 Series (080~160) | 100% direct drop-in replacement on SAE D 2-bolt flange (Ø152.4 mm pilot), large SAE 12/24-17T splines, and high-tonnage multi-stage press drive circuits. |
| Multi-Stage Assemblies | ECKERLE / HOERBIGER / HYDAC | EIPH2/2, EIPH3/2, EIPH3/3, EIPH5/3, EIPH6/5, HQI2/2, HQI3/2, PGI101/100 | Direct dimensional and functional interchangeability for multi-stage double and triple internal gear pumps across plastic injection and servo hydraulic presses. |
| Technical Performance Matrix Across Available Stages
| Stage Model Code | Mounting Flange Standard | Displacement cm³/rev (mL/r) | Operating Pressure (bar / MPa) | Speed Range (min⁻¹) | Flow @ 1500 rpm (L/min) | Input Power @ 250 bar (kW) | Noise Level dB(A) @ 250 bar | Stage Weight (kg) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| Continuous (p1) | Peak (p3) | Min. Speed | Max. Speed | |||||||
| Group 2 Series (2PHF / 2APHF) — SAE J744 SAE A 2-Bolt Oval Flange (Pilot Ø82.55 mm / 3.250 in) | ||||||||||
| 2PHF-04 | SAE A 2-Bolt | 4.20 | 280 / 28 | 320 / 32 | 200 | 3000 | 6.30 | 2.9 | 53 | 2.9 |
| 2PHF-05 | SAE A 2-Bolt | 5.40 | 280 / 28 | 320 / 32 | 200 | 3000 | 8.10 | 3.8 | 53 | 2.9 |
| 2PHF-06 | SAE A 2-Bolt | 6.40 | 280 / 28 | 320 / 32 | 200 | 3000 | 9.60 | 4.4 | 54 | 3.0 |
| 2PHF-08 | SAE A 2-Bolt | 7.90 | 280 / 28 | 320 / 32 | 200 | 3000 | 11.85 | 5.5 | 55 | 3.1 |
| 2PHF-11 | SAE A 2-Bolt | 10.90 | 250 / 25 | 300 / 30 | 200 | 2800 | 16.35 | 7.6 | 56 | 3.3 |
| 2PHF-13 | SAE A 2-Bolt | 13.30 | 250 / 25 | 300 / 30 | 200 | 2800 | 19.95 | 9.2 | 57 | 3.5 |
| 2PHF-16 | SAE A 2-Bolt | 15.80 | 250 / 25 | 300 / 30 | 200 | 2800 | 23.70 | 11.0 | 58 | 3.6 |
| 2PHF-19 | SAE A 2-Bolt | 19.30 | 250 / 25 | 300 / 30 | 200 | 2800 | 28.95 | 13.4 | 58 | 3.8 |
| 2PHF-20 | SAE A 2-Bolt | 20.10 | 250 / 25 | 300 / 30 | 200 | 2800 | 30.15 | 14.0 | 59 | 4.0 |
| 2PHF-22 | SAE A 2-Bolt | 22.20 | 250 / 25 | 280 / 28 | 200 | 2500 | 33.30 | 15.4 | 59 | 4.0 |
| 2PHF-25 | SAE A 2-Bolt | 25.20 | 250 / 25 | 280 / 28 | 200 | 2500 | 37.80 | 17.5 | 60 | 4.2 |
| Group 3 Series (3PHF) — SAE J744 SAE B 2-Bolt Oval Flange (Pilot Ø101.6 mm / 4.000 in) | ||||||||||
| 3PHF-25 | SAE B 2-Bolt | 24.80 | 250 / 25 | 320 / 32 | 200 | 3000 | 37.20 | 17.2 | 63 | 8.6 |
| 3PHF-32 | SAE B 2-Bolt | 32.10 | 250 / 25 | 300 / 30 | 100 | 2500 | 48.15 | 22.3 | 64 | 9.2 |
| 3PHF-40 | SAE B 2-Bolt | 40.10 | 250 / 25 | 280 / 28 | 100 | 2500 | 60.15 | 27.8 | 64 | 9.8 |
| 3PHF-50 | SAE B 2-Bolt | 50.30 | 250 / 25 | 280 / 28 | 100 | 2200 | 75.45 | 34.9 | 66 | 10.5 |
| 3PHF-63 | SAE B 2-Bolt | 63.10 | 180 / 18 | 210 / 21 | 100 | 1800 | 94.65 | 31.5 | 65 | 11.2 |
| Group 4 Series (4PHF) — SAE J744 SAE C 2-Bolt Oval Flange (Pilot Ø127.0 mm / 5.000 in) | ||||||||||
| 4PHF-64 | SAE C 2-Bolt | 65.30 | 250 / 25 | 300 / 30 | 100 | 3000 | 97.95 | 45.3 | 67 | 11.5 |
| 4PHF-80 | SAE C 2-Bolt | 80.40 | 250 / 25 | 280 / 28 | 100 | 2500 | 120.60 | 55.8 | 68 | 13.0 |
| 4PHF-100 | SAE C 2-Bolt | 100.50 | 230 / 23 | 280 / 28 | 100 | 2500 | 150.75 | 64.0 | 69 | 13.5 |
| Group 5 Series (5PHF) — SAE J744 SAE D 2-Bolt Oval Flange (Pilot Ø152.4 mm / 6.000 in) | ||||||||||
| 5PHF-80 | SAE D 2-Bolt | 80.00 | 300 / 30 | 330 / 33 | 200 | 2500 | 120.00 | 66.7 | 75 | 47.0 |
| 5PHF-100 | SAE D 2-Bolt | 101.20 | 300 / 30 | 330 / 33 | 200 | 2500 | 151.80 | 84.3 | 76 | 50.0 |
| 5PHF-125 | SAE D 2-Bolt | 125.70 | 250 / 25 | 280 / 28 | 200 | 2000 | 188.55 | 87.3 | 76 | 54.0 |
| 5PHF-145 | SAE D 2-Bolt | 145.30 | 250 / 25 | 280 / 28 | 200 | 2000 | 217.95 | 100.9 | 77 | 57.0 |
| 5PHF-160 | SAE D 2-Bolt | 160.10 | 250 / 25 | 280 / 28 | 200 | 2000 | 240.15 | 111.2 | 77 | 60.0 |
| Combination Series | Stage Frame Pairing | Displacement Range (cm³/rev) | Mounting Interface Standard |
|---|---|---|---|
| PHF 2/2 (or 2A/2A) | Group 2 + Group 2 | 4.2~25.2 + 4.2~25.2 | SAE J744 SAE A 2-Bolt Oval (Pilot Ø82.55 mm) |
| PHF 3/2 | Group 3 + Group 2 | 24.8~63.1 + 4.2~25.2 | SAE J744 SAE B 2-Bolt Oval (Pilot Ø101.6 mm) |
| PHF 3/3 | Group 3 + Group 3 | 24.8~63.1 + 24.8~63.1 | SAE J744 SAE B 2-Bolt Oval (Pilot Ø101.6 mm) |
| PHF 4/2 | Group 4 + Group 2 | 65.3~100.5 + 4.2~25.2 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 4/3 | Group 4 + Group 3 | 65.3~100.5 + 24.8~63.1 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 4/4 | Group 4 + Group 4 | 65.3~100.5 + 65.3~100.5 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 5/4 | Group 5 + Group 4 | 80.0~160.1 + 65.3~100.5 | SAE J744 SAE D 2-Bolt Oval (Pilot Ø152.4 mm) |
| PHF 5/5 | Group 5 + Group 5 | 80.0~160.1 + 80.0~160.1 | SAE J744 SAE D 2-Bolt Oval (Pilot Ø152.4 mm) |
| PHF 4/3/3 (Triple) | Group 4 + Group 3 + Group 3 | 65.3~100.5 + 24.8~50.3 + 24.8~50.3 | SAE J744 SAE C 2-Bolt Oval (Pilot Ø127.0 mm) |
| PHF 5/4/3 (Triple) | Group 5 + Group 4 + Group 3 | 80.0~160.1 + 65.3~100.5 + 24.8~50.3 | SAE J744 SAE D 2-Bolt Oval (Pilot Ø152.4 mm) |
| Hengyuhang Series | OEM Target Brand | Direct Replacement Models | Drop-In Interchangeability Characteristics |
|---|---|---|---|
| 2PHF Series | ECKERLE Hydraulics HOERBIGER HYDAC Technology | EIPH2 / EIPC2 Series (004~025) HQI2 Series (004~025) PGI100 Series (004~025) | 100% direct drop-in replacement on SAE A 2-bolt flange (Ø82.55 mm pilot), shaft key / spline profiles, porting locations, and servo operating performance. |
| 3PHF Series | ECKERLE Hydraulics HOERBIGER HYDAC Technology | EIPH3 / EIPC3 Series (025~064) HQI3 Series (025~064) PGI101 Series (025~064) | 100% direct drop-in replacement on SAE B 2-bolt flange (Ø101.6 mm pilot), shaft key / spline profiles, porting dimensions, and continuous pressure ratings. |
| 4PHF Series | ECKERLE Hydraulics HYDAC Technology | EIPH5 / EIPC5 Series (064~100) PGI102 Series (064~100) | 100% direct drop-in replacement on SAE C 2-bolt flange (Ø127.0 mm pilot), heavy shaft drive dimensions, and dual split-flange port patterns. |
| 5PHF Series | ECKERLE Hydraulics | EIPH6 / EIPC6 Series (080~160) | 100% direct drop-in replacement on SAE D 2-bolt flange (Ø152.4 mm pilot), large SAE 12/24-17T splines, and high-tonnage multi-stage press drive circuits. |
| Multi-Stage Assemblies | ECKERLE / HOERBIGER / HYDAC | EIPH2/2, EIPH3/2, EIPH3/3, EIPH5/3, EIPH6/5, HQI2/2, HQI3/2, PGI101/100 | Direct dimensional and functional interchangeability for multi-stage double and triple internal gear pumps across plastic injection and servo hydraulic presses. |
WhatsApp
Email
+86 19918575358
