Gear pump
Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt
Hengyuhang Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series combines a heavy-duty Group 3 ductile cast iron primary pump with a responsive Group 2 secondary pump in a versatile SAE B combination 2/4-bolt mount, delivering extreme fatigue endurance and high-efficiency dual-circuit fluid power up to 320 bar peak pressure.
| Applications of Hengyuhang Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
Engineered for mobile construction machinery, agricultural harvesters, and industrial equipment, this cross-frame tandem pump powers two distinct hydraulic circuits from a single prime mover power take-off. It provides rugged, continuous fluid power for mid-to-large crawler excavators, wheel loaders, backhoes, combine harvesters, telescopic handlers, and stationary industrial hydraulic power units requiring a high-flow, high-pressure primary work circuit coupled with an independent auxiliary or steering circuit.
| Key Technical Specifications
Product Model: Hengyuhang Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
Brand Replacement: CASAPPA, Rexroth, Marzocchi, Parker OEM or as requested.
Displacement: Front Stage (Group 3PT2F Cast Iron): 20 to 71 cm³/rev; Rear Stage (Group 2PDF): 4 to 30 cm³/rev
Rotation Direction: Clockwise (D), counter-clockwise (S), reversible (R)
Speed Range: Min. speed 500 to 600 r/min; Max. speed 2800 to 3500 r/min
Peak Pressure: Up to 320 bar (4,640 psi)
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| Overview of HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
The HENGYUHANG 3PT2F+2PDF SAE B 2/4-Bolt Series is an engineered cross-frame tandem fluid power solution built to international SAE mounting standards. It pairs a dedicated heavy-duty spheroidal graphite ductile cast-iron Group 3 front through-drive pump stage (3PT2F) with a versatile Group 2 rear pump stage (2PDF). Driven synchronously through an oversized, induction-hardened internal splined through-drive coupling, this configuration eliminates bulky split-drive gearboxes or complex flow-divider networks, delivering two distinct hydraulic circuits with completely independent operating pressures and flows.
Featuring a versatile SAE B combination 2/4-bolt mounting flange (centring pilot Ø 101.6 mm / 4.00 inches h8; 2-bolt diagonal hole spacing 146.0 mm / 5.75 inches; 4-bolt rectangular hole pattern 89.7 mm × 114.3 mm / 3.53 inches × 4.50 inches), the 3PT2F+2PDF series provides universal drop-in interchangeability on both 2-bolt and 4-bolt SAE B receiver pads. It directly replaces OEM tandem gear pumps across 27 leading international hydraulic manufacturers including CASAPPA (KP30 / KP35 / HDP30 / HDP35 / KP20 / PHP20), Bosch Rexroth (AZPT / AZPG / AZPF), PARKER (PGP620 / PGP640 / PGP511 / PGP517), MARZOCCHI, and DANFOSS. The Group 3 front stage covers displacements from 20.0 to 71.0 cm³/rev at continuous pressures up to 280 bar (4,060 psi) and peak pressures up to 320 bar (4,640 psi) for main implement circuits, while the Group 2 rear stage covers displacements from 4.0 to 30.0 cm³/rev at continuous pressures up to 250 bar (3,625 psi) and peak pressures up to 300 bar (4,350 psi) for auxiliary, steering, or pilot functions.
The front gear housing, SAE B combination flange, and intermediate bracket are cast from high-tensile spheroidal graphite ductile iron (QT500 / GGG50), delivering outstanding structural fatigue resistance, extreme pressure containment, and superior acoustic dampening under severe cyclic shock loads. Precision-ground, case-hardened alloy steel gears ride within heavy-duty composite DU/PTFE hydrodynamic sleeve bushings. Independently floating hydrostatic axial thrust balance plates on both pump sections continuously equalize running clearances across variable thermal and viscosity gradients, maintaining volumetric efficiencies exceeding 94% while suppressing pressure ripple and acoustic emissions throughout rigorous operational lifespans.
| Dimension of HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
Interface data needed with the drawing:
| Item | Value |
|---|---|
| Front mounting flange | SAE B combination 2/4-bolt flange (centring pilot Ø 101.6 mm / 4.00" h8; 2-bolt diagonal spacing 146.0 mm / 5.75"; 4-bolt rectangular pattern 89.7 × 114.3 mm / 3.53" × 4.50"; clearance holes Ø 14.3 mm / 9/16" for 1/2" bolts) |
| Primary drive shaft | SAE B 13-tooth involute splined shaft (7/8" 16/32 DP, flat root side fit) / Optional SAE B 15-tooth spline (1" 16/32 DP) / SAE B cylindrical keyed shaft Ø 22.22 mm (7/8") with 1/4" square key / European 1:8 taper shaft |
| Intermediate drive coupling | Heavy-duty induction-hardened internal involute splined through-drive coupling rated for full cumulative drive torque (Tmax ≥ 240 Nm) connecting the front 3PT2F through-shaft to the rear 2PDF gear journal |
| Rotation direction | Clockwise (D) or Counter-clockwise (S), viewed from drive shaft end (Bi-directional reversible rotation available upon special engineering order) |
| Inlet port routing | Independent separate suction ports (standard: individual 3PT2F and 2PDF suction ports) / Common merged suction port located on intermediate body (optional for consolidated tank line piping) |
| Front stage ports (3PT2F Cast Iron) | SAE 4-bolt split flange (Code 61, standard) / SAE straight thread O-ring boss (UN/UNF) / BSPP cylindrical thread / European 4-bolt diamond flange |
| Rear stage ports (2PDF) | European 4-bolt diamond flange (standard) / BSPP cylindrical thread / SAE straight thread O-ring boss (UN/UNF) |
| Seal materials | Standard NBR Buna-N elastomeric seals (-20 °C to +85 °C / -4 °F to +185 °F); Optional Viton (FKM) fluorocarbon seals for high-temperature synthetic fluid applications (-15 °C to +110 °C / +5 °F to +230 °F) |
| Body construction | Spheroidal graphite ductile cast iron (QT500 / GGG50) front body, SAE B 2/4-bolt flange, and intermediate bracket; high-tensile extruded aluminum alloy rear body with cast iron or aluminum rear cover |
| Flange mounting bolt torque | 100 ± 10 Nm (74 ÷ 81 lbf ft) for 1/2-13 UNC Grade 8 / M12 Grade 8.8 mounting bolts |
| Tie-rod clamp bolt torque | Front 3PT2F section: 110 ± 10 Nm; Rear 2PDF section: 45 ± 5 Nm |
| Pump Installation Specifications HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
The HENGYUHANG 3PT2F+2PDF SAE B 2/4-bolt flange tandem series utilizes an unambiguous modular model numbering system:
Code structure — reference: 3PT2F+2PDF-SAEB24 — Cross-Frame Group 3 Cast Iron + Group 2 SAE B 2/4-Bolt Tandem Gear Pump Series
| Segment | Meaning | Standard Options & Features |
|---|---|---|
| Series Code | 3PT2F+2PDF | Cross-frame tandem gear pump: Group 3PT2F cast iron front stage + Group 2PDF rear stage |
| Front Displacement | 20 to 71 | Group 3PT2F cast iron displacement in cm³/rev (20.0, 22.5, 26.0, 33.0, 38.0, 44.0, 52.0, 60.0, 71.0) |
| Rear Displacement | 4 to 30 | Group 2PDF displacement in cm³/rev (4.0, 6.0, 8.5, 11.0, 14.0, 16.5, 19.5, 22.5, 26.0, 30.0) |
| Rotation | D / S / R | D: Clockwise; S: Counter-clockwise; R: Reversible bi-directional |
| Drive Shaft | SB13 / SB15 / C22 | SB13: SAE B 13T spline (7/8" 16/32 DP); SB15: SAE B 15T spline (1" 16/32 DP); C22: Ø 22.22 mm keyed |
| Mounting Flange | SAEB24 | SAE B combination 2/4-bolt flange (pilot Ø 101.6 mm, 2-bolt 146 mm & 4-bolt 89.7 × 114.3 mm) |
| Inlet Routing | S / C | S: Separate dual suction ports (independent circuits); C: Common single merged suction inlet |
| Port Types | SF / UN / G / EF | SF: SAE split flange (Code 61); UN: SAE O-ring boss; G: BSPP thread; EF: European flange |
| Seals | N / V | N: Buna-N (NBR) standard; V: Viton (FKM) high-temperature / synthetic fluid seals |
| Auxiliary Options | RV / FD / ST | RV: Integrated pressure relief valve; FD: Priority flow divider valve; ST: Customized OEM specification |
| Reading your replacement code
| Your Target Brand & Model | HENGYUHANG 3PT2F+2PDF Equivalent | Interchange Verification Notes |
|---|---|---|
| CASAPPA KP30+KP20 / HDP30+PHP20 / PLP30+PLP20 (SAE B) | HENGYUHANG 3PT2F+2PDF Series | 100% direct drop-in; identical pilot Ø 101.6 mm, 2/4-bolt pattern, 13T spline, cross-frame dual displacement |
| PARKER PGP620+PGP511 / PGP640+PGP517 (SAE B) | HENGYUHANG 3PT2F+2PDF Series | Seamless mechanical envelope, shaft spline fit, and heavy-duty cast iron front + responsive rear pressure ratings |
| Bosch Rexroth AZPT+AZPF / AZPG+AZPF (SAE B) | HENGYUHANG 3PT2F+2PDF Series | Direct drop-in fit for heavy mobile excavators, wheel loaders, and agricultural machinery |
| MARZOCCHI GHP3+GHP2 / ALP3+ALP2 (SAE B) | HENGYUHANG 3PT2F+2PDF Series | Exact match on SAE B flange spigot, port drilling centers, and through-drive torque ratings |
| DANFOSS SNP3NN+SNP2NN / SNW3NN+SNW2NN (SAE B) | HENGYUHANG 3PT2F+2PDF Series | Direct drop-in fit for heavy agricultural tractors, combine harvesters, and construction equipment |
| JIHOSTROJ QHD1+P23 / QHD2+J (SAE B) | HENGYUHANG 3PT2F+2PDF Series | Complete heavy cast iron front + Group 2 rear drop-in replacement with identical mounting spigot and spline |
| BUCHER Hydraulics AP300+AP200 (SAE B) | HENGYUHANG 3PT2F+2PDF Series | Direct drop-in fit for high-power industrial power packs, drilling rigs, and material handling units |
| Galtech 3SPA+2SPA (SAE Mount) | HENGYUHANG 3PT2F+2PDF Series | Identical mounting pilot, through-shaft torque distribution, and port centerline dimensions |
| Techspecs of HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
| Performance Data Across Displacements
Note: Technical performance data below reflect nominal catalog ratings under ISO VG 46 mineral oil at 50 °C (122 °F). Actual operating pressures and flow rates should be verified against application duty cycle and final drawing.
Front Stage — Group 3PT2F (Cast Iron Heavy-Duty Through-Drive)
| 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) |
|---|---|---|---|---|---|---|---|---|
| 3PT2F-20 | 20.0 | 1.220 | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 600 | 3,500 | 30.00 |
| 3PT2F-22 | 22.5 | 1.372 | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 600 | 3,500 | 33.75 |
| 3PT2F-26 | 26.0 | 1.586 | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 600 | 3,500 | 39.00 |
| 3PT2F-33 | 33.0 | 2.013 | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 600 | 3,200 | 49.50 |
| 3PT2F-38 | 38.0 | 2.318 | 270 / 3,915 | 290 / 4,205 | 310 / 4,495 | 500 | 3,000 | 57.00 |
| 3PT2F-44 | 44.0 | 2.684 | 260 / 3,770 | 280 / 4,060 | 300 / 4,350 | 500 | 3,000 | 66.00 |
| 3PT2F-52 | 52.0 | 3.172 | 240 / 3,480 | 260 / 3,770 | 280 / 4,060 | 500 | 2,800 | 78.00 |
| 3PT2F-60 | 60.0 | 3.660 | 220 / 3,190 | 240 / 3,480 | 260 / 3,770 | 500 | 2,800 | 90.00 |
| 3PT2F-71 | 71.0 | 4.331 | 200 / 2,900 | 220 / 3,190 | 240 / 3,480 | 500 | 2,500 | 106.50 |
Rear Stage — Group 2PDF (High-Pressure Auxiliary Stage)
| 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) |
|---|---|---|---|---|---|---|---|---|
| 2PDF-4 | 4.0 | 0.244 | 250 / 3,625 | 280 / 4,060 | 300 / 4,350 | 700 | 4,000 | 6.00 |
| 2PDF-6 | 6.0 | 0.366 | 250 / 3,625 | 280 / 4,060 | 300 / 4,350 | 700 | 4,000 | 9.00 |
| 2PDF-8 | 8.5 | 0.518 | 250 / 3,625 | 280 / 4,060 | 300 / 4,350 | 600 | 3,500 | 12.75 |
| 2PDF-11 | 11.0 | 0.671 | 250 / 3,625 | 280 / 4,060 | 300 / 4,350 | 600 | 3,500 | 16.50 |
| 2PDF-14 | 14.0 | 0.854 | 250 / 3,625 | 280 / 4,060 | 300 / 4,350 | 500 | 3,500 | 21.00 |
| 2PDF-16 | 16.5 | 1.006 | 250 / 3,625 | 280 / 4,060 | 300 / 4,350 | 500 | 3,000 | 24.75 |
| 2PDF-19 | 19.5 | 1.189 | 230 / 3,335 | 260 / 3,770 | 280 / 4,060 | 500 | 3,000 | 29.25 |
| 2PDF-22 | 22.5 | 1.372 | 210 / 3,045 | 240 / 3,480 | 260 / 3,770 | 500 | 2,800 | 33.75 |
| 2PDF-26 | 26.0 | 1.586 | 190 / 2,755 | 220 / 3,190 | 240 / 3,480 | 500 | 2,800 | 39.00 |
| 2PDF-30 | 30.0 | 1.830 | 170 / 2,465 | 200 / 2,900 | 220 / 3,190 | 500 | 2,500 | 45.00 |
Note: Operating speed of the complete tandem assembly is governed by the lower maximum speed limit of the two selected pump displacements.
| 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 Part 1 and 2 |
| Operating viscosity range | 12 to 100 mm²/s (cSt) | Optimum performance viscosity range: 20 to 80 mm²/s (cSt) |
| Cold start viscosity limit | Up to 1,000 mm²/s (cSt) | Permissible during low-speed, low-pressure machine warm-up cycles |
| Fluid operating temperature | -20 °C to +85 °C (-4 °F to +185 °F) | Standard NBR Buna-N seals; Viton (FKM) required for +85 °C to +110 °C |
| Inlet suction line pressure | 0.7 to 3.0 bar absolute (10 to 44 psia) | Minimum 0.7 bar abs. at full working speed to prevent inlet cavitation |
| Fluid cleanliness rating | ISO 4406 Class 20/18/15 | Recommended circuit filtration: β25 ≥ 75 on return or suction filtration loop |
| Drive torque transmission | Heavy-duty through-drive intermediate shaft | Input shaft maximum torque must satisfy: Ttotal = Tfront + Trear ≤ Tshaft_limit |
Advantages — HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
Cast Iron Front Heavy-Duty Structural Endurance
The Group 3PT2F front stage is precision-cast from high-tensile spheroidal graphite ductile iron (QT500), delivering superior fatigue resistance, extreme structural rigidity against pressure dilation, and peak pressures up to 320 bar (4,640 psi).
SAE B Combination 2/4-Bolt Flange Universal Fit
Machined to exact SAE B combination dimensions (pilot Ø 101.6 mm, 2-bolt diagonal spacing 146.0 mm, 4-bolt rectangular pattern 89.7 × 114.3 mm), enabling universal mounting across both 2-bolt and 4-bolt equipment receiver pads.
Cross-Frame Dual-Circuit Multi-Function Power
Integrates a heavy Group 3 primary pump (20 to 71 cm³/rev) and a responsive Group 2 secondary pump (4 to 30 cm³/rev) on a single drive axis, optimizing prime mover PTO packaging while isolating primary work hydraulics from auxiliary or steering circuits.
Heavy-Duty Through-Drive Torque Transmission
Features an oversized, induction-hardened internal involute splined through-drive coupling rated to transmit full combined continuous drive torque without driveline backlash or premature spline fretting.
Sustained High Volumetric Efficiency (>94%)
Individual hydrostatic floating thrust balance plates on both pump sections continuously balance axial clearances across temperature and pressure fluctuations, minimizing internal slip and ensuring consistent output flow.
Superior Acoustic Damping & Low Pressure Ripple
High-precision hobbed and shaved gear profiles combined with the dense acoustic dampening characteristics of the ductile iron front body dramatically reduce operational noise across operator cabs and industrial workstations.
Reference — HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
Series Architecture Across Group 3 + Group 2 Combinations
The modular 3PT2F+2PDF tandem architecture pairs 9 front cast iron displacements with 10 rear displacements, generating over 90 standardized displacement combinations:
Heavy Cast Iron Primary Stage (Group 3PT2F): Displacements 20.0, 22.5, 26.0, 33.0, 38.0, 44.0, 52.0, 60.0, and 71.0 cm³/rev for high-pressure primary work circuits operating up to 320 bar peak pressure.
Secondary Auxiliary Stage (Group 2PDF): Displacements 4.0, 6.0, 8.5, 11.0, 14.0, 16.5, 19.5, 22.5, 26.0, and 30.0 cm³/rev for auxiliary functions, pilot pressure feeds, steering circuits, or secondary hydraulic motors.
Comprehensive Interchangeability Matrix Across 27 Brands
The HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series provides full mechanical, mounting, and hydraulic drop-in substitution for the following 27 international hydraulic manufacturers and their designated pump families:
MARZOCCHI: GHP2A, ALP2A, GHP2, ALP2, 1PD, GHP3, ALP3, GHP3A, ALP3A series tandem and modular gear pumps.
DANFOSS Power Solutions: SNP1NN, SNP3NN, SNW3NN series, SNP2, SNW2 series multi-section hydraulic pumps.
HYDAC: PGE102, PGE103 series, PGE104 series multi-circuit external gear pumps.
ARGO-HYTOS: GP2, GP3, GP1 series tandem external gear pump assemblies.
ATOS: PFG series modular tandem external gear pumps.
Brevini Fluid Power (Dana Brevini): OT100, OT200, OT300 series tandem gear pumps.
BUCHER Hydraulics: AP100, AP200, AP212, AP300 series multi-section gear pumps.
BONDIOLI & PAVESI: HPLPA1, HPLPA2, HPLPA3 series modular tandem gear pump units.
Boden: BAP1 series, BHP1, BAP2, BHP2, BHP3, BAP3 series multi-circuit hydraulic gear pumps.
Caproni: 10A, 20A, 30A, 10C, 20C, 30C series multi-section hydraulic pumps.
CASAPPA: KP20, PHP20, Polaris 20, PLP30, KP30, KP35, HDP30, HDP35 series cast iron and aluminum tandem gear pumps.
CONCENTRIC (Haldex): WP300, WP900, WP1500 series multi-stage external gear pumps.
DUPLOMATIC: 1P, GP2, GP3, GP1 series tandem external gear pumps.
Galtech: 1SPA, 2SPA, 3GPG, 3SPA series multi-circuit tandem hydraulic pumps.
GRH Hydraulics: 1PF, 2PF, 3PF series modular tandem external gear pumps.
HANSA-TMP: 1SP, 2SP, 3GPG, 3SPA series tandem gear pump systems.
HESPER: HA11, HA2, HA3 series, CHP1 series multi-stage hydraulic gear pumps.
HONOR Gear Pumps: 1KH series and Group 2/Group 3 tandem gear pump configurations.
HPI (Hydraulique Professionnelle Industrielle): P1BAN1, P1BAN2, P1AAN2, P1BAN3, P1AAN3 series tandem pumps.
HYDRONIT: E series multi-circuit modular gear pumps.
JIHOSTROJ: P23 series, J series, T3 series, Q2 series, UD series, QHD1, QHD2 heavy-duty cast iron multi-section gear pumps.
PARKER Hannifin: PGP511, PGP517 series, PGP620, PGP640 heavy-duty cast iron tandem external gear pumps.
Bosch Rexroth: AZPF, AZPG, AZPN, AZPT heavy-duty multi-circuit external gear pumps.
RONZIO: 02ZAG, 02ZCG, 02ZLG series, 03ZBG, 03ZAG series tandem gear pumps.
ROQUET: 1L0 series, PLA series, GZ series, G series, GLA series, PLC series, PNA series, PLJ series, PLK series, PLH series, PLZ series multi-stage gear pumps.
SDH (Shengda Hydraulics): CBN, CBT, CBF series multi-section external gear pumps.
VIVOLO (Vivoil): X1P series, XV-1P series, X2P, X3P series, XV-2P, XV-3P series tandem external gear pumps.
Brand Replacement
Quanzhou Hengyuhang Power Technology Co., Ltd. manufactures the 3PT2F+2PDF SAE B 2/4-Bolt Tandem Cast Iron Gear Pump Series in strict alignment with SAE standardized mounting dimensions and high-pressure fluid power specifications. Every tandem unit undergoes 100% computerized end-of-line verification, including simultaneous dual-circuit continuous pressure hold, multi-speed volumetric efficiency mapping (>94%), high-torque through-drive spline integrity testing, and port thread gauge verification. Machinery builders, equipment rebuilders, and hydraulic distributors can replace worn, failed, or long-lead OEM tandem pumps from CASAPPA (KP30 / KP35 / HDP30 / HDP35 / KP20 / PHP20), PARKER (PGP620 / PGP640 / PGP511 / PGP517), Rexroth (AZPT / AZPG / AZPF), MARZOCCHI, and DANFOSS with zero machine modifications, zero bracket reworking, and zero driveline realignment. Custom displacement combinations, specialized shaft profiles, common inlet manifolds, and integrated pressure relief or priority valves are fully supported with agile production schedules.
Applications — HENGYUHANG Tandem Cast Iron Hydraulic Gear Pump 3PT2F+2PDF SAE B 2/4-Bolt Series
Mobile Construction Machinery: Crawler excavators, wheel loaders, backhoe loaders, trenchers, and mini-excavators requiring high-pressure implement hydraulics paired with an auxiliary steering or pilot circuit.
Agricultural & Harvesting Equipment: High-horsepower farm tractors, combine harvesters, forage harvesters, large round balers, and heavy sprayers requiring independent implement and steering/auxiliary drive loops.
Material Handling & Aerial Equipment: Rough-terrain forklifts, telescopic handlers, reach stackers, container handlers, and mobile elevating work platforms.
Forestry & Municipal Vehicles: Log splitters, wood chippers, street sweepers, refuse collection trucks, and vacuum tankers.
Stationary Industrial Hydraulic Power Units (HPUs): Industrial compaction presses, metal scrap shears, automated machine tool power packs, and central hydraulic test benches.
Package & Shipping
| Packaging | Neutral heavy-duty export carton with form-fitting high-density molded foam cushioning; individual sealed anti-corrosion VCI barrier bags; export standard fumigation-free wooden pallet consolidation for batch orders. |
|---|---|
| Selling Unit | Single item (MOQ: 1 piece for standard displacement configurations; low MOQ for customized OEM combinations). |
| Single Package Size | 44.0 × 26.0 × 24.0 cm (17.32 × 10.24 × 9.45 in) per tandem pump assembly. |
| Single Gross Weight | 18.50 to 28.00 kg (40.78 to 61.73 lbs) depending on displacement pairing and port options. |
| Standard Lead Time | 3–7 business days for stock displacement pairings; 15–20 business days for tailored OEM batch production. |
| Logistics & Express | Air express (DHL, FedEx, UPS, TNT), air freight, ocean freight (FCL / LCL), and multimodal door-to-door DDP logistics with full tracking. |
| Customization Services | Custom nameplate laser engraving, private brand labeling, specialized shaft spline profiles, custom port threads, and factory CAD verification. |
Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence: Hengyuhang operates an advanced precision manufacturing facility equipped with multi-axis CNC machining centers, high-speed gear hobbing equipment, and CNC gear profile grinding machines. Operating clearances and gear tooth profiles are held to sub-micron tolerances (Ra < 0.2 μm), ensuring flawless gear meshing, structural rigidity, and long service life.
100% Full-Cycle Multi-Parameter Factory Inspection: Every tandem pump unit undergoes rigorous computerized testing prior to packaging. Testing protocols encompass multi-speed volumetric efficiency benchmarking (>94%), continuous rated and peak pressure endurance, internal casing leakage measurement, through-drive intermediate coupling load verification, and digital acoustic spectrum analysis to guarantee zero-defect delivery.
Seamless 1:1 OEM Drop-In Interchangeability: Engineered to precise SAE B combination 2/4-bolt flange, standard 13-tooth or 15-tooth involute splined shaft, and port centerline dimensions, Hengyuhang pumps provide 100% form, fit, and functional drop-in replacement for over 27 global hydraulic manufacturers without mounting bracket or plumbing alterations.
Flexible Engineering Customization & Rapid Prototyping: Supported by an experienced hydraulic engineering team, Hengyuhang provides tailored solutions including non-standard displacement combinations, common or separate suction port routing, integrated pressure relief or priority flow control valves, and low-MOQ rapid sampling for new machinery development.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: With large strategic raw material reserves of ductile cast-iron and aluminum alloys, standard displacement assemblies ship within 48 to 72 hours. Comprehensive international logistics channels ensure dependable door-to-door DDP delivery worldwide.
12-Month Comprehensive Warranty & Lifetime Technical Support: All products are backed by an unconditional 12-month factory warranty. Hengyuhang's dedicated fluid power engineers provide rapid 24-hour CAD mounting verification, cross-reference model decoding, and lifetime technical support for distributors and OEMs worldwide.
Tandem Cast Iron Hydraulic Gear Pump Group 3PT2F+2PDF SAE B 2/4-Bolt Flange Series (21.99~73.82 + 4.00~30.00 cm³/rev) is a high-performance hybrid dual-stage hydraulic gear pump engineered to deliver high-pressure fluid power, superior structural rigidity, and optimized weight balance from a single prime mover. Equipped with an industry-standard SAE J744 combination SAE "B" 2-bolt oval and 4-bolt universal mounting flange (centering pilot Ø101.6 mm / 4.000 in, 2-bolt ear centers 146.0 mm / 5.748 in with 2 × Ø14.3 mm holes, and dual 4-bolt patterns 89.0 × 89.0 mm / 3.5 × 3.5 in and 89.7 × 114.3 mm), this tandem pump provides direct mounting compatibility across both 2-bolt and 4-bolt mobile bellhousings. The assembly integrates a severe-duty Group 3 spheroidal graphite ductile cast-iron front pump (3PT2F) with a lightweight, high-volumetric-efficiency Group 2 extruded aluminum rear pump (2PDF), joined via a heavy-duty internal spline through-drive intermediate coupling shaft. The primary cast-iron stage resists structural barrel dilation, cyclic pressure fatigue, and thermal expansion under continuous working pressures (p1) up to 280 bar (4,060 psi) and peak spike pressures (p3) up to 320 bar (4,640 psi). The secondary aluminum stage provides high delivery efficiency and responsive secondary fluid power with working pressures up to 250 bar (3,625 psi). Covering 12 standardized displacements for the front stage (21.99 to 73.82 cm³/rev) and 10 standardized displacements for the rear stage (4.00 to 30.00 cm³/rev), this series offers combined displacement ratings from 25.99 to 103.82 cm³/rev (delivering up to 155.73 L/min @ 1500 rpm). Featuring case-hardened alloy steel gears and dual hydrostatic floating axial pressure balance thrust plates on both sections, this series maintains over 94% volumetric efficiency and serves as a direct 1:1 drop-in replacement for CASAPPA KAPPA + POLARIS (KP30+PLP20), Bosch Rexroth (AZPG+AZPF), Marzocchi (GHP3+ALP2), and Parker Commercial (PGP517+PGP511) SAE B 2/4-bolt hybrid tandem pump configurations.
| Applications
The 3PT2F+2PDF SAE B 2/4-bolt combination hybrid tandem hydraulic gear pump series is specifically engineered for severe-duty mobile machinery, commercial utility vehicles, and industrial power units where the primary circuit requires continuous high-pressure cast-iron endurance while the secondary circuit powers auxiliary, cooling, or pilot functions:
Commercial Utility Trucks and Refuse Vehicles: Directly PTO-driven via 2-bolt or 4-bolt SAE B bellhousings; the front ductile cast-iron stage powers high-pressure packing blades, container roll-offs, and ejector cylinders, while the secondary aluminum stage supplies continuous low-pulsation flow to bin lifters, cab tilt hoists, and auxiliary pilot circuits.
Agricultural Tractors, Combines and Harvesters: The heavy-duty cast-iron primary pump handles heavy front-end loader arms, main steering, and three-point hitch lift cylinders under high breakout forces, while the secondary aluminum pump independently powers reel drives, header height adjustments, or hydraulic motor fan loops.
Rough-Terrain Telehandlers and Heavy Forklifts: The front cast-iron pump operates high-tonnage telescopic boom lift and crowd cylinders under continuous severe holding loads, while the rear aluminum pump powers responsive mast tilting, carriage side-shift, and hydrostatic power steering circuits.
Medium Construction Wheel Loaders and Backhoes: Sustains severe digging shock loads on the primary cast-iron stage for bucket tilt and boom lift circuits, while the secondary aluminum pump feeds variable-speed hydraulic cooling fans and auxiliary attachment couplers.
High-Low Industrial Hydraulic Presses: Operates as an energy-efficient dual-flow combination; both pumps combine to deliver high flow during rapid cylinder advance, after which the secondary stage unloads to reservoir while the primary cast-iron stage sustains continuous holding pressures up to 280 bar without overheating or housing deflection.
Mobile Forestry and Timber Processing Equipment: The primary cast-iron pump drives high-load felling saw motors and grapple arm cylinders under high shock cycles, while the secondary aluminum pump feeds auxiliary boom slewing and hydraulic oil cooler fan circuits.
| Key Specifications Overview
| Parameter | Specification |
|---|---|
| Series Architecture | Heavy-Duty Hybrid Dual-Stage External Gear Pump (Group 3 Cast-Iron Front 3PT2F + Group 2 Aluminum Rear 2PDF) |
| Front Stage Displacement (3PT2F) | 21.99 ~ 73.82 cm³/rev (12 sizes: 21.99, 26.70, 30.63, 34.56, 39.27, 41.62, 43.98, 46.34, 51.83, 56.54, 61.26, 73.82 cm³/rev) |
| Rear Stage Displacement (2PDF) | 4.00 ~ 30.00 cm³/rev (10 sizes: 4.00, 6.00, 8.50, 11.00, 14.00, 16.50, 19.50, 22.50, 26.00, 30.00 cm³/rev) |
| Total Combined Displacement Range | 25.99 ~ 103.82 cm³/rev (modular dual-stage independent pairing: V1 + V2) |
| Continuous Operating Pressure (p1) | Front stage: 170 ~ 280 bar (2,465 ~ 4,060 psi); Rear stage: 170 ~ 250 bar (2,465 ~ 3,625 psi) |
| Intermittent Operating Pressure (p2) | Front stage: 190 ~ 300 bar (2,755 ~ 4,350 psi); Rear stage: 190 ~ 275 bar (2,755 ~ 3,988 psi) |
| Max. Peak Pressure (p3) | Front stage: 210 ~ 320 bar (3,045 ~ 4,640 psi); Rear stage: 210 ~ 300 bar (3,045 ~ 4,350 psi) |
| Rotational Speed Range | Min. speed: 500 ~ 700 min⁻¹ (rear stage limited); Max. speed: 2500 ~ 3000 min⁻¹ (displacement dependent) |
| Volumetric Efficiency | ≥ 94% across both stages under rated pressure and operating temperature |
| Hydro-Mechanical Efficiency | ≥ 89% ~ 92% |
| Body and Housing Construction | Hybrid construction: spheroidal graphite ductile cast iron front flange, front body, and intermediate adapter; high-strength extruded aluminum alloy rear body and end cover |
| Mounting Flange Standard | SAE J744 SAE "B" combination 2-bolt oval and 4-bolt universal flange (pilot Ø101.6 mm / 4.000 in, 9.5 mm depth; 2-bolt centers 146.0 mm; 4-bolt patterns 89.0 × 89.0 mm and 89.7 × 114.3 mm) |
| Primary Drive Shaft Specification | SAE "B" 13-tooth involute splined shaft (16/32 DP, 30° pressure angle, max torque 280 Nm) or SAE "B" cylindrical keyed shaft (Ø22.22 mm / 7/8 in with 6.35 mm key, max torque 220 Nm) |
| Intermediate Coupling Mechanism | High-tensile alloy steel internal spline through-drive coupling connecting Group 3 and Group 2 stages (allowable intermediate torque: up to 140 Nm) |
| Hydraulic Port Connections | Front stage: SAE Code 61 4-bolt split flange or SAE ORB straight thread (1-5/8-12 inlet, 1-1/16-12 outlet); Rear stage: SAE ORB or European 4-bolt flanged ports / BSPP |
| Rotation Direction | Clockwise (D / Right-Hand) standard; Counter-Clockwise (S / Left-Hand) available upon request (viewed from drive shaft end) |
| Hydraulic Fluid Compatibility | Mineral-oil-based hydraulic fluids (HL / HLP to ISO 6743/4; DIN 51524 Class 1 and 2); optimal viscosity range: 20 ~ 80 mm²/s (cSt) |
| Operating Temperature Range | -20°C to +85°C (standard NBR seals); -15°C to +110°C (optional Viton FKM seals) |
| Assembly Tightening Torques | Flange mounting bolts: 85 ± 5 Nm; Front cast-iron tie-rod bolts: 90 ± 5 Nm; Rear aluminum tie-rod bolts: 60 ± 4 Nm |
| Technical Performance Matrix Across Available Stages
| Stage Model Code | Stage Material | Displacement cm³/rev (in³/rev) | Operating Pressure (bar / psi) | Speed Range (min⁻¹) | Flow @ 1500 rpm (L/min) | |||
|---|---|---|---|---|---|---|---|---|
| Continuous (p1) | Intermittent (p2) | Peak (p3) | Min. Speed | Max. Speed | ||||
| Front Primary Stage (Group 3PT2F Ductile Cast Iron Series — SAE B 2/4-Bolt Interface) | ||||||||
| 3PT2F22 | Ductile Cast Iron | 21.99 (1.34) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 32.99 |
| 3PT2F27 | Ductile Cast Iron | 26.70 (1.63) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 40.05 |
| 3PT2F31 | Ductile Cast Iron | 30.63 (1.87) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 45.95 |
| 3PT2F34 | Ductile Cast Iron | 34.56 (2.11) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 51.84 |
| 3PT2F38 | Ductile Cast Iron | 39.27 (2.40) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 58.91 |
| 3PT2F41 | Ductile Cast Iron | 41.62 (2.54) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 62.43 |
| 3PT2F43 | Ductile Cast Iron | 43.98 (2.68) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 65.97 |
| 3PT2F46 | Ductile Cast Iron | 46.34 (2.83) | 270 / 3,915 | 290 / 4,205 | 310 / 4,495 | 350 | 3000 | 69.51 |
| 3PT2F51 | Ductile Cast Iron | 51.83 (3.16) | 210 / 3,045 | 230 / 3,335 | 250 / 3,625 | 350 | 2500 | 77.75 |
| 3PT2F56 | Ductile Cast Iron | 56.54 (3.45) | 190 / 2,755 | 210 / 3,045 | 230 / 3,335 | 350 | 2500 | 84.81 |
| 3PT2F61 | Ductile Cast Iron | 61.26 (3.74) | 180 / 2,610 | 200 / 2,900 | 220 / 3,190 | 350 | 2500 | 91.89 |
| 3PT2F73 | Ductile Cast Iron | 73.82 (4.50) | 170 / 2,465 | 190 / 2,755 | 210 / 3,045 | 350 | 2500 | 110.73 |
| Rear Secondary Stage (Group 2PDF Extruded Aluminum Series) | ||||||||
| 2PDF4 | Extruded Aluminum | 4.00 (0.24) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 700 | 4000 | 6.00 |
| 2PDF6 | Extruded Aluminum | 6.00 (0.37) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 700 | 4000 | 9.00 |
| 2PDF8 | Extruded Aluminum | 8.50 (0.52) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 700 | 3500 | 12.75 |
| 2PDF11 | Extruded Aluminum | 11.00 (0.67) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 600 | 3500 | 16.50 |
| 2PDF14 | Extruded Aluminum | 14.00 (0.85) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 600 | 3500 | 21.00 |
| 2PDF16 | Extruded Aluminum | 16.50 (1.01) | 230 / 3,335 | 255 / 3,698 | 280 / 4,060 | 500 | 3000 | 24.75 |
| 2PDF19 | Extruded Aluminum | 19.50 (1.19) | 210 / 3,045 | 235 / 3,408 | 260 / 3,770 | 500 | 3000 | 29.25 |
| 2PDF22 | Extruded Aluminum | 22.50 (1.37) | 200 / 2,900 | 225 / 3,263 | 250 / 3,625 | 500 | 2800 | 33.75 |
| 2PDF26 | Extruded Aluminum | 26.00 (1.59) | 180 / 2,610 | 200 / 2,900 | 230 / 3,335 | 500 | 2800 | 39.00 |
| 2PDF30 | Extruded Aluminum | 30.00 (1.83) | 170 / 2,465 | 190 / 2,755 | 210 / 3,045 | 500 | 2500 | 45.00 |
| Mechanical Drive Guidelines and Torque Limitations
| Mechanical Parameter | Engineering Specification and Limit |
|---|---|
| Primary Shaft Max. Drive Torque (T1_max) | 280 Nm (2,478 lbf in) for SAE "B" 13-tooth involute spline shaft; 220 Nm (1,947 lbf in) for SAE "B" Ø22.22 mm (7/8 in) keyed shaft |
| Intermediate Coupling Torque Limit (T2_max) | 140 Nm (1,239 lbf in) max torque transfer capacity for heavy-duty internal spline through-drive coupling connecting Group 3 and Group 2 stages |
| Cumulative Drive Torque Verification Formula | T_total = (V1 × p1) / (20 × π × η_hm) + (V2 × p2) / (20 × π × η_hm) ≤ T1_max |
| Secondary Stage Torque Verification Formula | T_rear = (V2 × p2) / (20 × π × η_hm) ≤ 140 Nm (protects through-drive intermediate spline coupling) |
| Recommended Stage Sequencing Rule | Always mount the heavy-duty cast-iron stage at the front (3PT2F) and the aluminum auxiliary stage at the rear (2PDF) to preserve driveline integrity |
| SAE B 2/4-Bolt Combination Flange, Shaft and Port Details
| Interface Feature | Technical Standard and Dimension |
|---|---|
| Mounting Flange Standard | SAE J744 SAE "B" combination 2-bolt oval and 4-bolt universal mounting flange (pilot Ø101.6 -0.05 mm / 4.000 in, pilot depth 9.5 mm / 0.374 in) |
| 2-Bolt Mounting Pattern | 146.0 mm (5.748 in) center-to-center distance with 2 × Ø14.3 mm (0.563 in) through mounting holes |
| 4-Bolt Mounting Pattern | Dual-compatible 4-bolt pattern: 89.0 × 89.0 mm (3.5 × 3.5 in) square and 89.7 × 114.3 mm rectangular hole centers for rigid 4-bolt bellhousings |
| Primary Drive Shaft (Standard) | SAE "B" 13-tooth involute splined shaft (16/32 DP, 30° pressure angle, flat root, shaft extension 33.3 mm from mounting face) |
| Primary Drive Shaft (Optional) | SAE "B" cylindrical keyed shaft (Ø22.22 mm / 7/8 in with 6.35 mm / 1/4 in square key, shaft extension 41.0 mm) |
| Intermediate Coupling Shaft | Heavy-duty alloy steel internal spline through-drive coupling connecting Group 3 and Group 2 stages (allowable torque: up to 140 Nm) |
| Front Stage Port Connections | SAE 4-bolt split flange Code 61 (3/8-16 UNC or 7/16-14 UNC threads) or SAE straight-thread O-ring boss (ORB 1-5/8-12 inlet, 1-1/16-12 outlet); optional BSPP |
| Rear Stage Port Connections | SAE straight-thread O-ring boss (ORB) or European 4-bolt flanged ports (G 3/4 inlet, G 1/2 outlet / BSPP) |
| 1:1 Direct-Fit OEM Brand Replacement Coverage
| Manufacturer Brand | Direct-Fit Drop-In Tandem Equivalent Series |
|---|---|
| CASAPPA | KAPPA + POLARIS Hybrid Series (KP30 Cast Iron Front + PLP20 Aluminum Rear with SAE B 2/4-bolt combination flange) |
| Bosch Rexroth | AZPN / AZPG Group 3 Cast Iron Front + AZPF Group 2 Aluminum Rear multiple gear pump assemblies (SAE B mounting) |
| MARZOCCHI | GHP3 Heavy Cast Iron Front + ALP2 High Performance Aluminum Rear tandem gear pumps with SAE B 2/4-bolt flange |
| PARKER Commercial | PGP517 / PGP620 Cast Iron Front + PGP511 Aluminum Rear dual modular external gear pumps (SAE B 2/4-bolt) |
| JIHOSTROJ | QHD3 Cast Iron Front + P23 Aluminum Rear hybrid tandem gear pumps with SAE B interface |
| DANFOSS / Turolla | SNP3 Cast Iron Front + SNP2 Aluminum Rear modular multiple gear pump assemblies with SAE B mounting |
| SALAMI | 3PB Cast Iron Front + 2PE Aluminum Rear hybrid double gear pumps with SAE B 2/4-bolt combination flange |
| BUCHER Hydraulics | AP300 / QX3 Cast Iron Front + AP212 Aluminum Rear hybrid double gear pump configurations |
| Technical Performance Matrix Across Available Stages
| Stage Model Code | Stage Material | Displacement cm³/rev (in³/rev) | Operating Pressure (bar / psi) | Speed Range (min⁻¹) | Flow @ 1500 rpm (L/min) | |||
|---|---|---|---|---|---|---|---|---|
| Continuous (p1) | Intermittent (p2) | Peak (p3) | Min. Speed | Max. Speed | ||||
| Front Primary Stage (Group 3PT2F Ductile Cast Iron Series — SAE B 2/4-Bolt Interface) | ||||||||
| 3PT2F22 | Ductile Cast Iron | 21.99 (1.34) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 32.99 |
| 3PT2F27 | Ductile Cast Iron | 26.70 (1.63) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 40.05 |
| 3PT2F31 | Ductile Cast Iron | 30.63 (1.87) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 45.95 |
| 3PT2F34 | Ductile Cast Iron | 34.56 (2.11) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 51.84 |
| 3PT2F38 | Ductile Cast Iron | 39.27 (2.40) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 58.91 |
| 3PT2F41 | Ductile Cast Iron | 41.62 (2.54) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 62.43 |
| 3PT2F43 | Ductile Cast Iron | 43.98 (2.68) | 280 / 4,060 | 300 / 4,350 | 320 / 4,640 | 350 | 3000 | 65.97 |
| 3PT2F46 | Ductile Cast Iron | 46.34 (2.83) | 270 / 3,915 | 290 / 4,205 | 310 / 4,495 | 350 | 3000 | 69.51 |
| 3PT2F51 | Ductile Cast Iron | 51.83 (3.16) | 210 / 3,045 | 230 / 3,335 | 250 / 3,625 | 350 | 2500 | 77.75 |
| 3PT2F56 | Ductile Cast Iron | 56.54 (3.45) | 190 / 2,755 | 210 / 3,045 | 230 / 3,335 | 350 | 2500 | 84.81 |
| 3PT2F61 | Ductile Cast Iron | 61.26 (3.74) | 180 / 2,610 | 200 / 2,900 | 220 / 3,190 | 350 | 2500 | 91.89 |
| 3PT2F73 | Ductile Cast Iron | 73.82 (4.50) | 170 / 2,465 | 190 / 2,755 | 210 / 3,045 | 350 | 2500 | 110.73 |
| Rear Secondary Stage (Group 2PDF Extruded Aluminum Series) | ||||||||
| 2PDF4 | Extruded Aluminum | 4.00 (0.24) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 700 | 4000 | 6.00 |
| 2PDF6 | Extruded Aluminum | 6.00 (0.37) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 700 | 4000 | 9.00 |
| 2PDF8 | Extruded Aluminum | 8.50 (0.52) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 700 | 3500 | 12.75 |
| 2PDF11 | Extruded Aluminum | 11.00 (0.67) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 600 | 3500 | 16.50 |
| 2PDF14 | Extruded Aluminum | 14.00 (0.85) | 250 / 3,625 | 275 / 3,988 | 300 / 4,350 | 600 | 3500 | 21.00 |
| 2PDF16 | Extruded Aluminum | 16.50 (1.01) | 230 / 3,335 | 255 / 3,698 | 280 / 4,060 | 500 | 3000 | 24.75 |
| 2PDF19 | Extruded Aluminum | 19.50 (1.19) | 210 / 3,045 | 235 / 3,408 | 260 / 3,770 | 500 | 3000 | 29.25 |
| 2PDF22 | Extruded Aluminum | 22.50 (1.37) | 200 / 2,900 | 225 / 3,263 | 250 / 3,625 | 500 | 2800 | 33.75 |
| 2PDF26 | Extruded Aluminum | 26.00 (1.59) | 180 / 2,610 | 200 / 2,900 | 230 / 3,335 | 500 | 2800 | 39.00 |
| 2PDF30 | Extruded Aluminum | 30.00 (1.83) | 170 / 2,465 | 190 / 2,755 | 210 / 3,045 | 500 | 2500 | 45.00 |
| 1:1 Direct-Fit OEM Brand Replacement Coverage
| Manufacturer Brand | Direct-Fit Drop-In Tandem Equivalent Series |
|---|---|
| CASAPPA | KAPPA + POLARIS Hybrid Series (KP30 Cast Iron Front + PLP20 Aluminum Rear with SAE B 2/4-bolt combination flange) |
| Bosch Rexroth | AZPN / AZPG Group 3 Cast Iron Front + AZPF Group 2 Aluminum Rear multiple gear pump assemblies (SAE B mounting) |
| MARZOCCHI | GHP3 Heavy Cast Iron Front + ALP2 High Performance Aluminum Rear tandem gear pumps with SAE B 2/4-bolt flange |
| PARKER Commercial | PGP517 / PGP620 Cast Iron Front + PGP511 Aluminum Rear dual modular external gear pumps (SAE B 2/4-bolt) |
| JIHOSTROJ | QHD3 Cast Iron Front + P23 Aluminum Rear hybrid tandem gear pumps with SAE B interface |
| DANFOSS / Turolla | SNP3 Cast Iron Front + SNP2 Aluminum Rear modular multiple gear pump assemblies with SAE B mounting |
| SALAMI | 3PB Cast Iron Front + 2PE Aluminum Rear hybrid double gear pumps with SAE B 2/4-bolt combination flange |
| BUCHER Hydraulics | AP300 / QX3 Cast Iron Front + AP212 Aluminum Rear hybrid double gear pump configurations |
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