Cast iron Hydraulic Gear Pump 6PTF SAE B 2/4-Bolt

| Overview of HENGYUHANG 6PTF SAE B 2/4-Bolt Series Cast Iron Hydraulic Gear Pumps

The HENGYUHANG 6PTF SAE B 2/4-Bolt Series represents extreme-duty fluid power engineering, featuring an all-cast-iron three-piece body architecture paired with an SAE "B" combination 2-bolt oval and 4-bolt flange mounting pattern. Specifically engineered for severe high-pressure hydraulic applications where conventional aluminum-casing pumps suffer fatigue, thermal expansion, or housing dilation, this series covers 14 standardized displacements ranging from 20 up to 250 cm³/rev (20CC to 250CC). Engineered to withstand continuous working pressures up to 280 bar (4,060 psi) and peak spike pressures up to 350 bar (5,076 psi / 35 MPa), the 6PTF series delivers genuine 1:1 drop-in replacement across 39 leading international hydraulic manufacturers without requiring mounting bracket alterations or hydraulic piping redesigns.

Manufactured from high-strength compacted graphite and spheroidal ductile cast iron, the 6PTF housing eliminates pressure-induced flex and mechanical fatigue under violent cyclic loading. The internal rotating assembly incorporates high-precision alloy steel gears subjected to advanced carburizing and quenching heat treatment for superior surface hardness and tooth bending strength. Heavy-duty hydrodynamic composite DU sleeve bearings with specialized anti-friction spray coatings ensure exceptional operational longevity under boundary lubrication conditions. Dual bi-metal copper pressure-balanced wear thrust plates dynamically compensate for operating clearances across varying thermal and pressure ranges, maintaining volumetric efficiencies above 94% across the entire service life.

| Dimension of HENGYUHANG 6PTF SAE B 2/4-Bolt Series Cast Iron Hydraulic Gear Pumps

Interface data needed with the drawing:

| Pump Installation Specifications HENGYUHANG 6PTF SAE B 2/4-Bolt Series

The HENGYUHANG 6PTF SAE B 2/4-Bolt Series pump utilizes a standardized modular ordering and specification code to ensure precise mechanical, hydraulic, and mounting interchangeability:

Code structure — reference: 6PTF — Heavy-Duty Cast Iron SAE B 2/4-Bolt Hydraulic Gear Pump Series

| Reading your replacement code

Techspecs — HENGYUHANG 6PTF SAE B 2/4-Bolt Series

Technical Performance Across Displacements

Working Liquid, Temperature & Kinematic Viscosity Specifications

Advantages — HENGYUHANG 6PTF SAE B 2/4-Bolt Series

Extreme Working Pressure up to 5,076 PSI / 35 MPa (350 bar)

High-density ductile cast iron body construction delivers unprecedented burst resistance, allowing sustained operation at 280 bar and intermittent peak pressures up to 350 bar across key displacement ranges (50 to 125 cm³/rev).

Universal Dual-Mounting SAE B 2/4-Bolt Flange

Combines both 2-bolt oval ear mounting (146.0 mm bolt centers) and 4-bolt rectangular patterns in a single rigid casting, dramatically increasing retrofit versatility across global OEM machinery.

Heavy-Duty Special DU Composite Bearings

Engineered with patented anti-friction surface coatings to endure prolonged heavy radial loads and high-viscosity cold starting under boundary lubrication.

Copper Pressure-Balanced Wear Thrust Plates

High-grade bi-metal bronze thrust plates dynamically balance axial pressure, preserving optimal face clearance and sustaining volumetric efficiencies above 94% across all temperature regimes.

High-Precision Carburizing & Quenching Gears

Micro-geometry gear teeth subjected to deep carburizing and case hardening deliver extraordinary surface hardness, minimal meshing friction, and ultra-quiet operation.

100% Factory Multi-Parameter Testing

Every individual pump undergoes automated end-of-line testing for internal leakage, continuous and peak pressure holding, flow verification, and noise spectrum profiling before packaging.

Customized Mounting Sizes & Oil Ports

Flexible engineering configuration supports specialized splined/keyed shafts, custom split-flange ports, and integrated relief/unloader valves upon request.

Reference — HENGYUHANG 6PTF SAE B 2/4-Bolt Series

Series Architecture Across 6PTF Series

The HENGYUHANG 6PTF Cast Iron family covers 14 standardized displacements, ensuring optimal hydraulic matching:

• Mid-Displacement High-Pressure Range (20 – 45 cm³/rev, up to 290 bar peak): 6PTF.20, 6PTF.25, 6PTF.32, 6PTF.40, 6PTF.45

• Ultra-High Pressure Heavy-Duty Range (50 – 125 cm³/rev, up to 350 bar peak / 35 MPa): 6PTF.50, 6PTF.63, 6PTF.70, 6PTF.80, 6PTF.90, 6PTF.100, 6PTF.112, 6PTF.125

• Maximum Delivery High-Flow Range (135 cm³/rev, up to 290 bar peak, 200 l/min output): 6PTF.135

Comprehensive Interchangeability Matrix Across 39 Brands

The HENGYUHANG 6PTF SAE B 2/4-Bolt Series provides proven mechanical, mounting, and hydraulic drop-in substitution for the following 39 international manufacturers:

• ARGO-HYTOS: GP3 / GP4 Series heavy cast iron external gear pumps

• ASEDA: Group 3/4 European cast iron tractor implement gear pumps

• ATOS: PFG-3 / PFE series heavy cast iron external gear pumps

• B&C Hydraulics: GR3 / GR4 series heavy cast iron gear pumps

• BLUEASCEND: Heavy cast iron gear pumps for mobile machinery

• Boden: Boden B3 / BG3 cast iron hydraulic gear pumps

• BONDIOLI & PAVESI: HP Series Group 3/4 cast iron gear pumps (HP3, HP4)

• Brevini Fluid Power (Dana Brevini): OT300 / B300 series heavy cast iron pumps

• BUCHER Hydraulics: AP312 / QX3 / QX4 series cast iron high-pressure gear pumps

• Caproni: 30A / 30C / Group 3/4 cast iron hydraulic gear pumps

• CASAPPA: POLARIS / PLATINUM (KP40, KP35, KP30, PLP30, 6PTF) cast iron gear pumps

• CONCENTRIC (Haldex): W1500 / Calzoni Group 3/4 cast iron external pumps

• DANFOSS Power Solutions: SNP3 / Turolla D Series heavy cast iron Group 3/4 pumps

• DUPLOMATIC: IGP3 / GP3 series cast iron external gear pumps

• Galtech: 3SP / 4SP series heavy cast iron gear pumps

• GRH Hydraulics: 6PTF / 4PTF series cast iron gear pumps

• HANSA-TMP: Heavy cast iron gear pumps and power pack units

• HESPER: Group 3/4 cast iron mobile hydraulic gear pumps

• HIDRAULICA: Heavy cast iron external gear pumps

• HONOR Gear Pumps: Group 3/4 heavy cast iron series pumps

• HPI (Hydraulique Professionnelle Industrielle): Series M3 / P3 cast iron gear pumps

• HYDAC: PGE300 / PGE400 series cast iron external gear pumps

• HYDROMAX: Heavy cast iron external hydraulic gear pumps

• HYDRONIT: Heavy power pack central block gear pumps

• JIHOSTROJ: P33 / QHD3 Series heavy cast iron hydraulic gear pumps

• JOYANG: Heavy cast iron gear pumps for material handling

• KOMPASS: Heavy industrial cast iron gear pumps

• KRACHT: KF 3 / KP 3 / KP 5 series cast iron high-performance gear pumps

• MARZOCCHI: GHP3 / GHP4 / 3P series cast iron high-pressure gear pumps

• MetaHydra: Heavy cast iron custom gear pumps

• PARKER Hannifin: Commercial PGP517 / PGP620 / PGP350 / PGP365 Cast Iron Series gear pumps

• REXPOWER: Heavy cast iron external gear pumps

• Bosch Rexroth: AZPG / AZPB Series cast iron Group 3/4 gear pumps

• REXROTH-SIGMA: Sigma Group 3/4 cast iron gear pumps

• RONZIO: 03 Series heavy cast iron high-pressure gear pumps

• ROQUET: 3L / 3M Series heavy cast iron external gear pumps

• SALAMI: 3PB / 3PE series cast iron heavy-duty gear pumps

• SDH (Shengda Hydraulics): Heavy cast iron gear pumps

• VIVOLO (Vivoil): X3P / XV-3P Series heavy-duty Group 3/4 gear pumps

7. Brand Replacement

Quanzhou Hengyuhang Power Technology Co., Ltd. manufactures the 6PTF SAE B 2/4-Bolt Cast Iron Series conforming to international OEM heavy-duty 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 Commercial, 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 6PTF SAE B 2/4-Bolt Series

Heavy Construction & Earthmoving Machinery: Large hydraulic excavators, wheel loaders, motor graders, bulldozers, and heavy backhoe auxiliary circuits.

Mining, Drilling & Tunneling Equipment: Underground mining loaders, blast hole drill rigs, heavy crushing equipment, and tunneling auxiliary power units.

Commercial Utility Vehicles & Heavy Truck Hydraulics: Heavy dump truck hoists, refuse compactor trucks, roll-off container loaders, and truck-mounted telescopic cranes.

Agricultural & Forestry Harvesters: High-horsepower agricultural tractors, timber forwarders, feller bunchers, combine harvesters, and forestry skidders.

Marine & Port Equipment: Deck winches, anchor windlasses, reach stackers, and mobile harbor crane drive systems.

Heavy Industrial HPUs: High-pressure hydraulic forging presses, plastic extrusion hydraulic power packs, metal shearing lines, and scrap metal balers.

9. Package & Shipping

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.