Gear pump
Cast iron Hydraulic gear pump 4PTF 4-Hole Rectangular Series
Hengyuhang Cast iron Hydraulic Gear Pump 4PTF 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 Cast iron Hydraulic Gear Pump 4PTF 4-Hole Rectangular Series
This cast iron 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 Cast iron Hydraulic Gear Pump 4PTF 4-Hole Rectangular Series
Brand Replacement: CASAPPA, Rexroth, Marzocchi, Parker OEM or as requested.
Displacement: 22CC - 73CC cm³/rev (22 to 74 cm³/rev)
Rotation Direction: Clockwise (D), counter-clockwise (S), reversible (R)
Speed Range: Min. speed 350 r/min; Max. speed 2500 to 3000 r/min
Peak Pressure: 210 to 320 bar (3,045 to 4,640 psi)
- Description
- Tecspecs
- Brand & Reference
- Download HENGYUHANG 4PTF PDF Hydraulic Gear Pump PDF
- Send an Inquiry
| Overview of HENGYUHANG 4PTF 4-Hole Rectangular Series Cast Iron Hydraulic Gear Pumps
The HENGYUHANG 4PTF 4-Hole Rectangular Series represents heavy-duty European fluid power engineering, combining an all-cast-iron three-piece body architecture with a rigid 4-bolt rectangular mounting flange. Specifically developed for severe continuous hydraulic duty where conventional aluminum-casing pumps suffer fatigue, thermal dilation, or pressure-induced barrel expansion, this series spans 12 standardized displacements from 21.99 up to 73.82 cm³/rev (22CC to 74CC). Engineered to withstand continuous working pressures up to 280 bar (4,060 psi) and peak spike pressures up to 320 bar (4,640 psi), the 4PTF series delivers genuine 1:1 drop-in replacement across 39 leading international hydraulic manufacturers without requiring mounting bracket redesigns or hydraulic piping alterations.
Manufactured from high-density spheroidal graphite ductile cast iron across the front 4-bolt rectangular mounting flange, central gear housing, and rear cover, the 4PTF pump offers three distinct casing configurations—Compact (HSC/KSL), Standard (CSC/CSL), and High Performance (BSC/BSL)—to match varying space envelope constraints and extreme pressure requirements. The internal rotating group features case-hardened, precision-ground micro-geometry alloy steel gears supported by heavy-duty hydrodynamic composite DU/PTFE sleeve bushings. Dual hydrostatic floating axial pressure balance thrust plates automatically adjust operating clearances to compensate for thermal expansion and face wear, sustaining volumetric efficiencies above 94% while providing quiet, low-pulsation fluid delivery across demanding mobile machinery cabs and heavy industrial manufacturing plants.
| Dimension of HENGYUHANG 4PTF 4-Hole Rectangular Series Cast Iron 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 or Ø 60.3 mm, rectangular 4-bolt mounting pitch, 4-Ø 11.4 mm through mounting holes) / Optional German standard 4-hole fixed flange |
| Drive shaft | 1:8 European taper shaft with woodruff key (M14 × 1.5 retaining nut) / Cylindrical keyed shaft (Ø 22.22 mm / 7/8 in or Ø 25.0 mm) / Involute splined shaft (DIN 5482 B17x14 or SAE 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 or threaded ports on cast iron body / Rear-cover ports for compact manifold block integration |
| Inlet Port | European standard 4-bolt flanged port (M10 threads) / SAE 4-bolt split flange (Code 61) / G 1" or G 1-1/4" BSPP thread |
| Outlet Port | European standard 4-bolt flanged port (M10 threads) / SAE 4-bolt split flange (Code 61) / G 3/4" or G 1" BSPP thread |
| 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 | Full heavy-duty spheroidal graphite ductile cast-iron body, front 4-bolt rectangular mounting flange, and rear cover (all-cast-iron construction) |
| Flange mounting bolt torque | 85 ±5 Nm (752 ÷ 796 lbf in) |
| Body tie-rod screw tightening torque | 90 ±5 Nm (796 ÷ 841 lbf in) |
| Pump Installation Specifications HENGYUHANG 4PTF 4-Hole Rectangular Series
The HENGYUHANG 4PTF 4-Hole Rectangular Series pump utilizes a standardized modular ordering and specification code to ensure precise mechanical, hydraulic, and mounting interchangeability:
Code structure — reference: 4PTF — Heavy-Duty 4-Hole Rectangular Cast Iron Hydraulic Gear Pump Series
| Segment | Meaning | Standard Options & Features |
|---|---|---|
| Series | 4PTF | Heavy-duty cast iron external gear pump architecture with 4-hole rectangular mounting (21.99 to 73.82 cm³/rev) |
| Displacement | 22 to 73 | Nominal model size code (4PTF22, 4PTF27, 4PTF31, 4PTF34, 4PTF38, 4PTF41, 4PTF43, 4PTF46, 4PTF51, 4PTF56, 4PTF61, 4PTF73) |
| Body Type | CSC / BSC / HSC | HSC: Compact body; CSC: Standard body; BSC: High performance (Alte prestazioni) body |
| 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 | T1 / C1 / S1 | T1: 1:8 European taper shaft with woodruff key (M14 × 1.5 nut); C1: Cylindrical keyed shaft; S1: Splined shaft |
| Mounting Flange | E4 / G4 | E4: European standard 4-bolt rectangular flange (pilot Ø 50.8 mm); G4: German 4-hole fixed flange (pilot Ø 60.3 mm) |
| Ports Code | L / P | L: Side body flanged/threaded ports; P: Rear cover threaded ports |
| Inlet / Outlet | F2 / U2 / G2 | F2: European 4-bolt flanged ports; U2: SAE 4-bolt split flange (Code 61); G2: BSPP cylindrical thread |
| 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 4PTF 4-Hole Equivalent | Interchange Verification Notes |
|---|---|---|
| CASAPPA POLARIS / PLATINUM (PLP30 / KP30 / 4PTF Series) | HENGYUHANG 4PTF 4-Hole Series | 100% mounting spigot pilot, 4-bolt pitch, shaft taper, and extreme pressure ratings match |
| Bosch Rexroth AZPG (4-Bolt Rectangular Cast Iron) | HENGYUHANG 4PTF 4-Hole Series | Identical 4-bolt rectangular mounting pattern, shaft keyway, and continuous pressure rating match |
| MARZOCCHI GHP3 Series (Standard 4-Bolt Cast Iron) | HENGYUHANG 4PTF 4-Hole Series | Direct mechanical envelope match; identical inlet/outlet flange drillings and pressure resilience |
| PARKER PGP517 / PGP620 Cast Iron Series (4-Bolt) | HENGYUHANG 4PTF 4-Hole Series | Full hydraulic flow compatibility, exact 4-bolt centers, and drive shaft interchange |
| DANFOSS / Turolla Group 3 Heavy Cast Iron 4-Bolt | HENGYUHANG 4PTF 4-Hole Series | Seamless drop-in fit for heavy mobile machinery, wheel loader steering, and industrial HPUs |
| VIVOLO (Vivoil) XV-3P Heavy 4-Bolt Series | HENGYUHANG 4PTF 4-Hole Series | Direct interchange on shaft, flange, and side flanged/threaded ports |
| SALAMI 3PB / 3PE Cast Iron 4-Bolt Series | HENGYUHANG 4PTF 4-Hole Series | Identical bolt hole pattern and cast iron journal high-pressure ratings |
| BUCHER Hydraulics QX3 / AP312 Cast Iron 4-Hole | HENGYUHANG 4PTF 4-Hole Series | Direct mounting fit for heavy industrial machine tools, presses, and mobile cranes |
Techspecs — HENGYUHANG 4PTF 4-Hole Rectangular Series
Performance Data Across Displacements & Body Configurations
| Pump Model | Displacement (cm³/rev) | Body Configuration | Continuous Pressure p1 (bar) | Intermittent Pressure p2 (bar) | Peak Pressure p3 (bar) | Max. Speed (min⁻¹) | Min. Speed (min⁻¹) | Flow at 1500 r/min (l/min) |
|---|---|---|---|---|---|---|---|---|
| 4PTF22 | 21.99 | Compact (HSC/KSL) Standard (CSC/CSL) High Perf. (BSC/BSL) | 260 270 280 | 280 290 300 | 300 310 320 | 3,000 | 350 | 32.99 |
| 4PTF27 | 26.70 | Compact (HSC/KSL) Standard (CSC/CSL) High Perf. (BSC/BSL) | 240 270 280 | 260 290 300 | 280 310 320 | 3,000 | 350 | 40.05 |
| 4PTF31 | 30.63 | Compact (HSC/KSL) Standard (CSC/CSL) High Perf. (BSC/BSL) | 220 250 280 | 240 270 300 | 260 290 320 | 3,000 | 350 | 45.95 |
| 4PTF34 | 34.56 | Compact (HSC/KSL) Standard (CSC/CSL) High Perf. (BSC/BSL) | 210 250 280 | 230 270 300 | 250 290 320 | 3,000 | 350 | 51.84 |
| 4PTF38 | 39.27 | Compact (HSC/KSL) Standard (CSC/CSL) High Perf. (BSC/BSL) | 210 250 280 | 230 270 300 | 250 290 320 | 3,000 | 350 | 58.91 |
| 4PTF41 | 41.62 | Standard (CSC/CSL) High Perf. (BSC/BSL) | 250 280 | 270 300 | 290 320 | 3,000 | 350 | 62.43 |
| 4PTF43 | 43.98 | Standard (CSC/CSL) High Perf. (BSC/BSL) | 230 280 | 250 300 | 270 320 | 3,000 | 350 | 65.97 |
| 4PTF46 | 46.34 | Standard (CSC/CSL) High Perf. (BSC/BSL) | 210 270 | 230 290 | 250 310 | 3,000 | 350 | 69.51 |
| 4PTF51 | 51.83 | Standard (CSC/CSL) | 210 | 230 | 250 | 2,500 | 350 | 77.75 |
| 4PTF56 | 56.54 | Standard (CSC/CSL) | 190 | 210 | 230 | 2,500 | 350 | 84.81 |
| 4PTF61 | 61.26 | Standard (CSC/CSL) | 180 | 200 | 220 | 2,500 | 350 | 91.89 |
| 4PTF73 | 73.82 | Standard (CSC/CSL) | 170 | 190 | 210 | 2,500 | 350 | 110.73 |
| Note: Pressure ratings apply to unidirectional pumps and motors. For reversible bi-directional units, maximum pressure is 250 bar across all models, unless the listed value is lower. | ||||||||
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 4PTF 4-Hole Rectangular Series
Extreme Pressure Resistance (Peak up to 320 bar / 4,640 psi)
Engineered with high-strength spheroidal graphite ductile cast iron that resists barrel dilation and pressure-induced fatigue under continuous high-cyclic loads.
Superior 4-Bolt Anti-Vibration Rigidity
The symmetrical 4-hole rectangular flange anchors the pump firmly to the machine bell-housing, effectively neutralizing hydraulic shock pulses, torsional harmonics, and shaft bending stresses.
Three Tailored Body Configurations
Offers Compact (HSC), Standard (CSC), and High Performance (BSC) variants, allowing precision optimization between space envelope constraints and severe continuous operating pressures.
Direct 1:1 OEM Drop-In Interchangeability
Matches CASAPPA POLARIS / PLATINUM (PLP30 / KP30 / 4PTF), Bosch Rexroth AZPG, MARZOCCHI GHP3, and PARKER PGP517 mounting dimensions, shaft profiles, and port centerlines across 39 leading global brands.
Thermal & Dimensional Stability
High-density cast iron matches the thermal expansion coefficient of hardened steel gears, maintaining tight internal clearances and preventing internal seizure under severe continuous duty cycles.
High Volumetric Efficiency (>94%)
Dual hydrostatic floating thrust plates dynamically maintain perfect axial gear tooth face sealing, minimizing internal slip over thousands of operating hours.
Acoustic Dampening & Low Noise
The dense cast iron mass absorbs gear meshing vibrations and high-frequency fluid noise, ensuring exceptionally quiet operation in enclosed operator cabins.
Reference — HENGYUHANG 4PTF 4-Hole Rectangular Series
Series Architecture Across 4PTF Series
The HENGYUHANG 4PTF 4-Hole Rectangular Cast Iron family covers 12 standardized displacements, ensuring optimal hydraulic matching:
Ultra-High Pressure Range (21.99 – 34.56 cm³/rev, up to 320 bar peak): 4PTF22, 4PTF27, 4PTF31, 4PTF34
Mid-Displacement High-Power Range (39.27 – 46.34 cm³/rev, up to 320 bar peak): 4PTF38, 4PTF41, 4PTF43, 4PTF46
High-Delivery Output Range (51.83 – 73.82 cm³/rev, up to 250 bar peak): 4PTF51, 4PTF56, 4PTF61, 4PTF73
Comprehensive Interchangeability Matrix Across 39 Brands
The HENGYUHANG 4PTF 4-Hole Rectangular Series provides proven mechanical, mounting, and hydraulic drop-in substitution for the following 39 international manufacturers:
ARGO-HYTOS: GP3 Series heavy 4-bolt cast iron external gear pumps
ASEDA: Group 3 European 4-bolt cast iron tractor implement gear pumps
ATOS: PFG-3 / PFE series heavy 4-bolt cast iron external gear pumps
B&C Hydraulics: GR3 series heavy 4-bolt cast iron gear pumps
BLUEASCEND: Group 3 4-bolt cast iron gear pumps for mobile machinery
Boden: Boden B3 / BG3 4-bolt cast iron hydraulic gear pumps
BONDIOLI & PAVESI: HP Series Group 3 4-bolt cast iron gear pumps (HP3, HPL3)
Brevini Fluid Power (Dana Brevini): OT300 / B300 series heavy 4-bolt cast iron pumps
BUCHER Hydraulics: AP312 / QX3 series 4-bolt cast iron high-pressure gear pumps
Caproni: 30A / 30C / Group 3 4-bolt cast iron hydraulic gear pumps
CASAPPA: POLARIS / PLATINUM Cast Iron (PLP30 4-bolt, KP30, 4PTF, Whisper Cast Iron) gear pumps
CONCENTRIC (Haldex): W1500 / Calzoni Group 3 4-bolt cast iron external pumps
DANFOSS Power Solutions: SNP3 / Turolla D Series heavy 4-bolt cast iron Group 3 pumps
DUPLOMATIC: IGP3 / GP3 series 4-bolt cast iron external gear pumps
Galtech: 3SP series heavy 4-bolt cast iron gear pumps
GRH Hydraulics: 4PTF / 3PTF series 4-bolt cast iron gear pumps
HANSA-TMP: Group 3 4-bolt cast iron gear pumps and power pack units
HESPER: Group 3 4-bolt cast iron mobile hydraulic gear pumps
HIDRAULICA: Group 3 4-bolt cast iron external gear pumps
HONOR Gear Pumps: Group 3 4-bolt cast iron series pumps
HPI (Hydraulique Professionnelle Industrielle): Series M3 / P3 4-bolt cast iron gear pumps
HYDAC: PGE300 series 4-bolt cast iron external gear pumps
HYDROMAX: Group 3 4-bolt cast iron external hydraulic gear pumps
HYDRONIT: Group 3 4-bolt cast iron power pack central block gear pumps
JIHOSTROJ: P33 / Q3 Series Group 3 4-bolt cast iron hydraulic gear pumps
JOYANG: Group 3 4-bolt cast iron gear pumps for material handling
KOMPASS: Group 3 4-bolt cast iron industrial gear pumps
KRACHT: KF 3 / KP 3 series 4-bolt cast iron high-performance gear pumps
MARZOCCHI: GHP3 / 3P series 4-bolt cast iron high-pressure gear pumps
MetaHydra: Group 3 4-bolt cast iron custom gear pumps
PARKER Hannifin: PGP517 / PGP620 Cast Iron Series 4-bolt Group 3 gear pumps
REXPOWER: Group 3 4-bolt cast iron external gear pumps
Bosch Rexroth: AZPG Series 4-bolt cast iron Group 3 gear pumps
REXROTH-SIGMA: Sigma Group 3 4-bolt cast iron gear pumps
RONZIO: 03 Series Group 3 4-bolt cast iron high-pressure gear pumps
ROQUET: 3L / 3M Series Group 3 4-bolt cast iron external gear pumps
SALAMI: 3PB / 3PE series 4-bolt cast iron heavy-duty gear pumps
SDH (Shengda Hydraulics): Group 3 4-bolt cast iron gear pumps
VIVOLO (Vivoil): X3P / XV-3P Series heavy-duty 4-bolt Group 3 gear pumps
7. Brand Replacement
Quanzhou Hengyuhang Power Technology Co., Ltd. manufactures the 4PTF 4-Hole Rectangular Cast Iron Series conforming to international OEM heavy-duty 4-bolt 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 4PTF 4-Hole Rectangular Series
Heavy Construction Machinery: Large excavators, wheel loaders, motor graders, bulldozers, and heavy scrapers operating in high-pressure auxiliary and pilot circuits.
Agricultural & Harvesting Machinery: High-horsepower agricultural tractors, combine harvesters, cotton pickers, and forage harvesters demanding continuous fluid power under dusty field conditions.
Commercial & Heavy Material Handling: Heavy-capacity forklift trucks, container reach stackers, gantry cranes, and mobile harbor machinery.
Mining, Drilling & Tunneling Equipment: Underground mining loaders, blast hole drill rigs, crushing equipment, and slurry pump hydraulic drives.
Heavy Industrial HPUs: Hydraulic stamping presses, plastic injection molding auxiliary circuits, metal shearing equipment, and steel mill rolling hydraulics.
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 | 14.50 to 22.80 kg (31.97 to 50.26 lbs) depending on displacement and flange configuration. |
| 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.
Cast Iron Hydraulic Gear Pump Group 4PTF 4-Hole Rectangular Series (21.99–73.82 cm³/rev) is a high-pressure, severe-duty external hydraulic gear pump engineered with an all-cast-iron structural body and rigid front and rear end covers. Built specifically for high-load mobile machinery and demanding industrial systems requiring continuous high operating pressures and superior fatigue endurance, this series offers 12 displacement ratings from 21.99 to 73.82 cm³/rev. Depending on the selected body configuration—Compact (HSC/KSL), Standard (CSC/CSL), or High Performance (BSC/BSL)—the Group 3PTF delivers continuous operating pressures ($p_1$) up to 280 bar (intermittent pressure $p_2$ up to 300 bar, peak pressure $p_3$ up to 320 bar) and maximum operating speeds up to 3000 min⁻¹. Featuring a European standard 4-bolt rectangular mounting flange (98.5 × 128 mm bolt centers with Ø50.8 mm centering pilot), a heavy-duty 1:8 taper shaft (M14×1.5), and hydrostatic pressure-balanced journal thrust plates, the 3PTF 4-hole rectangular series provides outstanding volumetric efficiency, structural stability under cyclic pressure spikes, and extended operational life.
| Applications
The Group 4PTF 4-hole rectangular series cast iron gear pump is engineered for heavy-duty mobile machinery and high-stress industrial applications, including agricultural tractors, combine harvesters, telescopic boom handlers, medium and heavy wheel loaders, hydraulic excavators, backhoe loaders, mobile cranes, paving and milling machines, municipal refuse collection vehicles, heavy-duty material handlers, forestry timber equipment, and continuous-duty industrial hydraulic power units subject to continuous high operating pressures and cyclic pressure shocks.
| Key Specifications Overview
| Parameter | Specification |
|---|---|
| Series | Group 4PTF Heavy-Duty Cast Iron Series (European 4-Hole Rectangular Mounting) |
| Displacement Range | 21.99 ~ 73.82 cm³/rev across 12 standard frame sizes (4PTF22 to 4PTF73) |
| Continuous Working Pressure (p1) | 170 ~ 280 bar (up to 280 bar on BSC/BSL High Performance bodies) |
| Intermittent Working Pressure (p2) | 190 ~ 300 bar (up to 300 bar on BSC/BSL High Performance bodies) |
| Max. Peak Pressure (p3) | 210 ~ 320 bar (up to 320 bar on BSC/BSL High Performance bodies) |
| Max. Rotational Speed | 3000 min⁻¹ (4PTF22 ~ 4PTF46) / 2500 min⁻¹ (4PTF51 ~ 4PTF73) |
| Min. Rotational Speed | 350 min⁻¹ across all displacement models |
| Body Configurations | Compact (HSC/KSL), Standard (CSC/CSL), and High Performance (BSC/BSL) |
| Housing Material | High-tensile monolithic cast iron body with heavy-duty cast iron front and rear covers |
| Mounting Flange | European 4-bolt rectangular pattern (98.5 × 128 mm bolt centers, Ø50.8 mm centering pilot, 4 × Ø11 mm holes) |
| Drive Shaft Options | 1:8 European taper shaft with M14×1.5 threaded tip and woodruff key |
| Rotation Options | Clockwise (Right / D) or Counter-Clockwise (Left / S) unidirectional; Reversible bidirectional available (max 250 bar) |
| Hydraulic Fluid | Mineral-based hydraulic oil (ISO VG 46 / HLP) |
| Fluid Temperature Range | -25°C to +80°C (standard NBR seals) / up to +100°C with optional FKM/Viton seals |
| Technical Parameters & Performance Ratings (Group 4PTF)
| Pump / Motor Type | Displacement (cm³/rev) | Body Type | Execution / Characteristics | Max. Pressure (bar) | Max. Speed (min⁻¹) | Min. Speed (min⁻¹) | ||
|---|---|---|---|---|---|---|---|---|
| p1 (Continuous) | p2 (Intermittent) | p3 (Peak) | ||||||
| 4PTF22 | 21.99 | HSC / KSL | Compact | 260 | 280 | 300 | 3000 | 350 |
| CSC / CSL | Standard | 270 | 290 | 310 | ||||
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF27 | 26.70 | HSC / KSL | Compact | 240 | 260 | 280 | 3000 | 350 |
| CSC / CSL | Standard | 270 | 290 | 310 | ||||
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF31 | 30.63 | HSC / KSL | Compact | 220 | 240 | 260 | 3000 | 350 |
| CSC / CSL | Standard | 250 | 270 | 290 | ||||
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF34 | 34.56 | HSC / KSL | Compact | 210 | 230 | 250 | 3000 | 350 |
| CSC / CSL | Standard | 250 | 270 | 290 | ||||
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF38 | 39.27 | HSC / KSL | Compact | 210 | 230 | 250 | 3000 | 350 |
| CSC / CSL | Standard | 250 | 270 | 290 | ||||
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF41 | 41.62 | CSC / CSL | Standard | 250 | 270 | 290 | 3000 | 350 |
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF43 | 43.98 | CSC / CSL | Standard | 230 | 250 | 270 | 3000 | 350 |
| BSC / BSL | High Performance (Alte prestazioni) | 280 | 300 | 320 | ||||
| 4PTF46 | 46.34 | CSC / CSL | Standard | 210 | 230 | 250 | 3000 | 350 |
| BSC / BSL | High Performance (Alte prestazioni) | 270 | 290 | 310 | ||||
| 4PTF51 | 51.83 | CSC / CSL | Standard | 210 | 230 | 250 | 2500 | 350 |
| 4PTF56 | 56.54 | CSC / CSL | Standard | 190 | 210 | 230 | 2500 | 350 |
| 4PTF61 | 61.26 | CSC / CSL | Standard | 180 | 200 | 220 | 2500 | 350 |
| 4PTF73 | 73.82 | CSC / CSL | Standard | 170 | 190 | 210 | 2500 | 350 |
* Note: Pressures in the table refer to unidirectional pumps and motors. For reversible (bidirectional) units, maximum continuous operating pressure is 250 bar (except where standard ratings are lower).
4PTF Series — Complete Model List
Available Models
| Type |
|---|
| 4PTF22 |
| 4PTF27 |
| 4PTF31 |
| 4PTF34 |
| 4PTF38 |
| 4PTF41 |
| 4PTF43 |
| 4PTF46 |
| 4PTF51 |
| 4PTF56 |
| 4PTF61 |
| 4PTF73 |
WhatsApp
Email
+86 19918575358
