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

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

The HENGYUHANG 4PTF SAE B 2/4-Bolt Series represents heavy-duty fluid power engineering, combining an all-cast-iron three-piece body architecture with an innovative combination SAE "B" 2-bolt oval and 4-bolt flange mounting pattern. Specifically engineered 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 international manufacturers including CASAPPA, JIHOSTROJ, KRACHT, PARKER, DAVID BROWN, GPD, METARIS, and HYDRECO without requiring mounting bracket alterations or hydraulic piping redesigns.

Manufactured from high-density spheroidal graphite ductile cast iron across the front universal 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 severe 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, commercial utility trucks, and heavy industrial manufacturing plants.

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

Interface data needed with the drawing:

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

The HENGYUHANG 4PTF 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: 4PTF-SB — Heavy-Duty Cast Iron SAE B 2/4-Bolt Hydraulic Gear Pump Series

| Reading your replacement code

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

Performance Data Across Displacements & Body Configurations

Operating Conditions & Fluid Compatibility

Advantages — HENGYUHANG 4PTF SAE B 2/4-Bolt 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.

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

Combines both 2-bolt oval ear mounting (146 mm center) and 4-bolt flange patterns on a single rigid cast iron casting, dramatically increasing installation flexibility across diverse North American and international machinery interfaces.

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, PARKER Commercial, JIHOSTROJ, KRACHT, DAVID BROWN, GPD, METARIS, and HYDRECO mounting dimensions, shaft profiles, and port centerlines without modification.

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 SAE B 2/4-Bolt Series

Series Architecture Across 4PTF Series

The HENGYUHANG 4PTF SAE B 2/4-Bolt 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

Target Brand Interchangeability Matrix

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

• CASAPPA: POLARIS / PLATINUM (PLP30 / KP30 / 4PTF series) with SAE B 2-bolt and 4-bolt mounting

• JIHOSTROJ: P33 / QHD3 Series heavy-duty cast iron hydraulic gear pumps with SAE B interface

• KRACHT: KP 3 / KF 3 Series high-performance cast iron gear pumps (SAE B mounting)

• PARKER Hannifin: Commercial Intertech PGP517 / PGP620 / PGP330 series cast iron gear pumps

• DAVID BROWN Hydraulics: PowrKraft / Hamworthy heavy mobile gear pumps

• GPD (Gear Pump Division): Cast iron commercial vehicle PTO and heavy mobile pumps

• METARIS (Hydraulex): MH30 / MH50 heavy-duty cast iron external gear pumps

• HYDRECO Hydraulics: Heavy mobile implement and steering cast iron gear pumps

7. Brand Replacement

Quanzhou Hengyuhang Power Technology Co., Ltd. manufactures the 4PTF 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, PARKER Commercial, JIHOSTROJ, KRACHT, DAVID BROWN, GPD, METARIS, and HYDRECO 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 SAE B 2/4-Bolt Series

Commercial Utility Vehicles & Truck Hydraulics: Dump truck hoist bodies, refuse compactor trucks, hook lifts, recovery tow trucks, and truck-mounted crane hydraulic circuits.

Heavy Construction Machinery: Wheel loaders, motor graders, excavators, backhoes, and trenchers requiring high-pressure auxiliary power and steering assist.

Agricultural & Forestry Harvesters: High-horsepower farm tractors, forestry forwarders, skidders, combine harvesters, and heavy baler drive loops.

Material Handling & Port Equipment: Heavy container handlers, reach stackers, rough-terrain forklifts, and mobile harbor cranes.

Industrial HPUs & Hydraulic Power Packs: Hydraulic balers, compactors, high-pressure machine tool power packs, and recycling shears.

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 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.