Gear pump
HENGYUHANG Hydraulic Power Unit Gear Pump CBN CBT Series
Featuring a high-strength extruded aluminum alloy profile body, precision-machined alloy steel gears, and an advanced hydrostatic axial clearance compensation structure with radial hydraulic pressure balance, the HENGYUHANG CBN & CBT Series gear pump delivers rated continuous pressure of 20 MPa (200 bar / 2,900 psi), peak pressure up to 25 MPa (250 bar / 3,625 psi), and high volumetric efficiency (≥ 90%–92%).
| Applications
Widely engineered for agricultural tractors, diesel and electric forklifts, mini excavators, commercial vehicle tailgates, and industrial hydraulic power units (HPUs), the CBN/CBT Series powers steering circuits, main lifting cylinders, and auxiliary implement hydraulics. Available with standard European rectangular 4-bolt or SAE 2-bolt diamond mounting flanges, multiple shaft configurations (splined, keyed, flat tang, tapered), and modular flange or threaded ports, it provides seamless 1:1 drop-in replacement across leading domestic and international mobile hydraulic platforms.
| Key Technical Specifications
Product Model: Hengyuhang Hydraulic Power Unit Gear Pump CBN/CBT Series
Brand Replacement: YTO, Foton Lovol, Heli, Hangcha, Lonking, XCMG, Changyuan, Shimadzu, Kayaba OEM or as requested.
Displacement: 4 to 25 cm³/rev across 10 standardized models (304, 306, 308, 310, 312, 314, 316, 320, 322, 325)
Rotation Direction: Clockwise (R, standard default) and Counter-clockwise (L) (viewed looking at drive shaft end)
Speed Range: Minimum operating speed 600–800 r/min; Rated speed 2,000–2,500 r/min; Maximum permissible speed 3,000 r/min
Peak Pressure: Rated continuous pressure 20 MPa (200 bar / 2,900 psi; E-grade: 16 MPa / G-grade: 25 MPa); Maximum peak pressure 25 MPa (250 bar / 3,625 psi)
| Overview of HENGYUHANG CBN & CBT Series Hydraulic Gear Pumps
The HENGYUHANG CBN and CBT Series (Module 3 Gear) represent the industrial standard for medium-to-high pressure external hydraulic gear pumps in agricultural machinery, material handling equipment, and mobile power packs. Engineered across 10 standardized displacement sizes — ranging from 4 cm³/rev up to 25 cm³/rev — the CBN/CBT family produces fluid flow rates from 8.0 l/min to 62.5 l/min at rated 2,000–2,500 r/min speeds, satisfying a diverse range of demanding mechanical actuation and fluid power requirements.
Built with a high-strength extruded aluminum alloy body and rigid front/rear cast covers, the CBN/CBT pump resists high-pressure shock pulses while maintaining exceptional thermal conductivity and lightweight handling. The internal pumping core utilizes carburized, hardened, and finish-ground alloy steel gears with an optimized tooth profile that minimizes flow ripple and operational noise. A dual-mechanism hydrostatic design incorporates automatic axial clearance floating side plates and radial hydraulic balance grooves, compensating for thermal expansion and mechanical wear to preserve volumetric efficiency (≥ 90%–92%) over thousands of heavy-duty operating hours.
| Dimension of HENGYUHANG CBN & CBT Series Hydraulic Gear Pumps
| Interface Data Needed with the Drawing Across the Standard Models
| Interface / Feature Item | Engineering Specification & Dimensional Callout | Standard Design & Fitment Details |
|---|---|---|
| Rectangular Mounting Flange | Code B — Rectangular 4-Bolt Flange (Standard) | Centering pilot spigot: Ø 38 mm (tolerance f8: −0.025 / −0.064 mm); Spigot protrusion height: 5 mm; Pilot pocket depth: 17 mm; Four mounting through-holes: 4-Ø 9 mm on rectangular pattern 70 mm × 100 mm; Overall flange profile: 86 mm × 116 mm |
| Diamond Mounting Flange | Code A — Rhomboid 2-Bolt Flange (Optional) | Centering pilot spigot: Ø 80 mm; Two mounting bolt holes / slots: 2-Ø 11 mm on center-to-center distance 109 mm; Overall width: 86 mm |
| Parallel Keyed Shaft P1 | Code P1 — Plain Key Shaft (Ø 16 mm) | Shaft diameter: Ø 16 mm (−0.02 / −0.04 mm); Parallel key width: 5 mm (−0.03 mm); Key length: 25 mm (or 28 mm); Keyway height: 18 mm; Extension length: 40 mm (±0.5 mm) |
| Parallel Keyed Shaft P2 | Code P2 — Plain Key Shaft (Ø 18 mm) | Shaft diameter: Ø 18 mm (−0.02 / −0.04 mm); Parallel key width: 6 mm (−0.03 mm); Key length: 25 mm; Keyway height: 20.5 mm; Extension length: 40 mm (±0.5 mm) |
| Rectangular Spline Shaft H | Code H — 6-Tooth Straight Spline | 6 splines; Major diameter: Ø 18 mm; Minor diameter: Ø 15 mm; Spline tooth width: 4 mm (−0.011 / −0.044 mm); Effective spline length: 25 mm; Extension length: 40 mm (±0.5 mm) |
| SAE Involute Spline Shaft S | Code S — SAE 11-Tooth Involute Spline | 11 teeth; Pitch: 16/32 DP; Pressure angle: 30°; Major diameter: Ø 18 mm (0 / −0.13 mm); Minor diameter: Ø 15.45 mm (0 / −0.2 mm); Effective length: 25 mm; Extension: 40 mm |
| Metric Involute Spline Shaft X | Code X — Metric 11-Tooth Involute Spline | 11 teeth; Module: m = 1.5; Pressure angle: 30°; Major diameter: Ø 18 mm (0 / −0.13 mm); Minor diameter: Ø 14.25 mm (0 / −0.27 mm); Effective length: 25 mm; Extension: 40 mm |
| Tapered Shaft Z | Code Z — 1:8 / 1:10 Conical Shaft with Woodruff Key | Conical taper: 1:8 or 1:10; Threaded shaft tip: M12 × 1.5 or M10 × 1.25 with hex nut and lock washer; Woodruff key: 3 × 6.5 × 16 mm or 6 × 16 mm; Total extension: 31–47.5 mm |
| Flat Tang Drive Shaft B | Code B — Slotted Flat End Drive | Drive tang width: 8 mm (−0.10 mm) or 10 mm; Diameter: Ø 15 mm or Ø 17.5 mm; Tang extension length: 10–15 mm; Designed for direct dog-drive coupling into tractor engine timing gears |
| Flange Oil Ports (Code F) | Standard Diamond 4-Bolt Flange Pads | Threaded holes: 4-M8-6H (depth 15 mm) on bolt circle Ø 38 mm; Sizes 4–12: Inlet orifice Ø 14 mm, Outlet orifice Ø 10 mm; Sizes 14–25: Inlet orifice Ø 18 mm, Outlet orifice Ø 14 mm |
| Threaded Oil Ports (Code L) | Metric & Gas Threaded Connections | Sizes 4–6: Inlet M20 × 1.5 / Outlet M18 × 1.5 (or ZG 1/2" / ZG 3/8"); Sizes 10–20: Inlet M22 × 1.5 / Outlet M20 × 1.5 (or ZG 3/4" / ZG 1/2"); Sizes 22–25: Inlet M24 × 1.5 / Outlet M22 × 1.5 (or ZG 3/4" / ZG 1/2") |
| Direction of Rotation | Code R (Right / CW) and L (Left / CCW) | R (Clockwise, standard): Default right-hand rotation viewed looking at drive shaft end; L (Counter-clockwise): Left-hand rotation available upon request |
| Pump Installation Specifications
| Modular Model Ordering Code Structure
CB□−□3□□−□□□
CB[Series]−[Pressure][Module][Displacement]−[Flange / Port][Shaft][Rotation]
| Position / Segment | Code Element | Description & Available Options |
|---|---|---|
| 1. Gear Pump Series Code | CBT / CBN | CBT = Standard CBT industrial series (Module 3); CBN = Standard CBN agricultural & mobile machinery series (Module 3) |
| 2. Pressure Rating Grade | E, F, G | E = 16 MPa (160 bar / 2,320 psi); F = 20 MPa (200 bar / 2,900 psi, standard continuous, 25 MPa peak); G = 25 MPa (250 bar / 3,625 psi heavy-duty rating) |
| 3. Gear Module | 3 | Gear module m = 3 |
| 4. Nominal Displacement | 04 to 25 | Geometric displacement (cm³/rev): 04 (4.0), 06 (6.0), 08 (8.0), 10 (10.0), 12 (12.0), 14 (14.0), 16 (16.0), 20 (20.0), 22 (22.0), 25 (25.0) |
| 5. Port Connection Type | F, L | F = Diamond 4-bolt flange port connection (4-M8 on Ø38 mm, standard default); L = Threaded port connection (Metric M20/M22/M24 or BSP/ZG threads) |
| 6. Mounting Flange Type | B, A, T | B = Rectangular 4-bolt flange (pilot Ø38 mm, 70 × 100 mm pitch, standard default); A = Rhomboid 2-bolt diamond flange (pilot Ø80 mm, 109 mm center distance); T = Special customized agricultural/forklift mounting flange |
| 7. Drive Shaft Extension | P, H, B, S, X, Z | P = Plain parallel key shaft (P1 Ø16 mm or P2 Ø18 mm); H = Rectangular 6-spline shaft (6 × 18 × 15 mm); B = Flat end / tang drive (width 8 mm or 10 mm); S = SAE 11-tooth involute spline (16/32 DP, 30° PA); X = Metric 11-tooth involute spline (m = 1.5, 30° PA); Z = Taper shaft (1:8 or 1:10) with woodruff key and retention nut |
| 8. Direction of Rotation | R, L | R = Right-hand / Clockwise (standard default, viewed facing shaft); L = Left-hand / Counter-clockwise |
| Reading Your Replacement Code
| Target Brand & Part Number | HENGYUHANG Equivalent | Fitment & Direct Interchange Verification |
|---|---|---|
| YTO Tractor CBN-E310 / CBN-F310 | CBN-F310-BPR / CBT-F310 | 100% exact OEM drop-in: 10 cc/rev, rectangular flange, keyed shaft, steering/lift pump |
| Foton Lovol Tractor CBN-E314 / F314 | CBN-F314-BHR | Direct replacement: 14 cc/rev, 6-spline shaft, 20 MPa rated pressure for main loader |
| Heli / Hangcha Forklift CBT-F316-AFH | CBT-F316-AFH / CBN-F316 | Standard forklift hydraulic pump: 16 cc/rev, diamond 2-bolt flange, spline drive |
| Heli Forklift CBT-F320-AFP | CBT-F320-AFP | Direct OEM match: 20 cc/rev, diamond 2-bolt flange, plain keyed shaft for mast hoist |
| Agricultural Tractor CBN-E304 / F306 | CBN-F304 / CBN-F306 | Compact auxiliary implement pump: 4–6 cc/rev, 20 MPa, 4-bolt rectangular flange |
| Lonking / Liugong CBT-F325-BFX | CBT-F325-BFX | Maximum capacity 25 cc/rev gear pump with 11-tooth involute spline for mobile machinery |
| Changyuan / Wanyuan CBT-F3 Series | CBT-F3 Series (Matching Code) | Exact dimensional, shaft, port, and hydraulic performance drop-in replacement |
| Shimadzu SGP1 / Kayaba KRP4 | CBT/CBN Series (Matching Spec) | High-efficiency 200 bar replacement for Japanese forklift and tractor auxiliary circuits |
Techspecs of HENGYUHANG CBN & CBT Series
4.1 Performance Data Across 10 Displacements
| Model Number | Nominal Displacement (cm³/rev) | Rated Pressure (MPa / bar) | Maximum Pressure (MPa / bar) | Rated Speed (r/min) | Speed Range (Min–Max, r/min) | Volumetric Efficiency (≥%) | Input Power at Rated Conditions (kW) |
|---|---|---|---|---|---|---|---|
| CBN / CBT-F304 | 4.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 90 | 2.63 |
| CBN / CBT-F306 | 6.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 90 | 3.95 |
| CBN / CBT-F308 | 8.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 91 | 5.26 |
| CBN / CBT-F310 | 10.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 91 | 6.58 |
| CBN / CBT-F312 | 12.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 91 | 7.90 |
| CBN / CBT-F314 | 14.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 91 | 9.22 |
| CBN / CBT-F316 | 16.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 91 | 10.53 |
| CBN / CBT-F320 | 20.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 92 | 13.17 |
| CBN / CBT-F322 | 22.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 92 | 14.82 |
| CBN / CBT-F325 | 25.0 | 20 / 200 | 25 / 250 | 2,000–2,500 | 600–3,000 | 92 | 16.46 |
4.2 Operating Pressure & Speed Limits
| Parameter | Permissible Operational Limit | Engineering Operating Conditions |
|---|---|---|
| Continuous Rated Pressure | 20 MPa (200 bar / 2,900 psi) | Standard F-grade rating; E-grade 16 MPa (160 bar); G-grade 25 MPa (250 bar) |
| Maximum Peak Pressure | 25 MPa (250 bar / 3,625 psi) | Permissible transient pressure spikes during hydraulic cylinder relief bypass |
| Speed Range | 600 to 3,000 r/min | Minimum speed 600–800 r/min; Rated speed 2,000–2,500 r/min; Max speed 3,000 r/min |
| Volumetric Efficiency | ≥90%–92% | Maintained throughout service life via automatic axial clearance compensation |
| Drive Shaft Radial / Axial Loads | Radial ≤350 N; Axial ≤200 N | Direct coupling recommended; flexible coupling required for misaligned drives |
| Inlet Suction Pressure | −0.03 to +0.03 MPa | Minimum suction absolute pressure ≥0.7 bar to prevent cavitation |
4.3 Fluid & Filtration Specifications
| Parameter | Permissible Operating Limits | Optimal Recommended Target |
|---|---|---|
| Recommended Hydraulic Fluid | Anti-wear mineral hydraulic oil (ISO VG 32 / VG 46 / VG 68; HM / HV) | High-grade HM 46 anti-wear hydraulic oil |
| Operating Viscosity Range | ν=10 to 300 mm²/s (cSt) | νₒₚₜ=20 to 60 mm²/s (cSt) |
| Operating Fluid Temperature | −20 ∘C to +80 ∘C (−4 ∘F to +176 ∘F) | +30 ∘C to +60 ∘C (+86 ∘F to +140 ∘F) |
| Filtration Rating (Suction Line) | ≤100 μm wire mesh suction strainer | Submerged tank pickup to protect pump against debris |
| Filtration Rating (Return Line) | ≤25 μm (β₂₅≥75) | Target fluid cleanliness: ISO 4406 Class 19/16 (NAS 1638 Class 10) |
Advantages of HENGYUHANG CBN & CBT Series Hydraulic Gear Pumps
Automatic Axial Clearance Compensation & Radial Balance
Precision-machined floating side plates dynamically balance internal axial gaps against discharge pressure while radial pressure-relief grooves reduce bearing side loads, maintaining superior volumetric efficiency (≥90%–92%) and low power consumption over extended operational life.
High-Strength Extruded Aluminum Alloy Profile Body
Heat-treated extruded aluminum alloy construction delivers maximum fatigue resistance and pressure containment up to 25 MPa peak, while providing lightweight handling and superior thermal heat dissipation.
Carburized Alloy Steel Gears with Low Vibration
Gear teeth are machined from high-grade alloy steel, vacuum-carburized, and ground to microscopic tooth flank tolerances, producing smooth laminar flow, reduced pressure ripple, and quiet acoustic emission (<65 dBA).
High-Temperature Fluorocarbon & Nitrile Dual Seals
Premium fluorocarbon (FKM) and nitrile (NBR) seal elements maintain elastic sealing integrity across severe ambient temperatures (−20 ∘C to +80 ∘C), completely preventing external oil leakage and internal cross-port fluid bypass.
Universal Multi-Shaft & Multi-Flange Flexibility
Available with rectangular 4-bolt (B) or diamond 2-bolt (A) flanges, and six standard shaft drives (P1/P2 straight keyed, H rectangular 6-spline, S SAE 11-tooth, X metric 11-tooth, Z taper, B flat tang), providing 100% plug-and-play interchangeability with worldwide tractor, forklift, and power pack equipment.
100% Computerized Dynamometer Quality Testing
Every manufactured pump undergoes strict computerized bench testing, verifying volumetric efficiency, flow output across rated rpm, continuous 20 MPa pressure hold, and seal integrity before export packaging.
Reference
6.1 Displacement & Model Matrix
Displacements Available: 4, 6, 8, 10, 12, 14, 16, 20, 22, and 25 cm³/rev.
Mounting Flanges:
Code B (Rectangular 4-Bolt): Pilot Ø38 mm, bolt pattern 70 mm × 100 mm, 4-Ø9 mm holes (standard).
Code A (Diamond 2-Bolt): Pilot Ø80 mm, bolt center distance 109 mm, 2-Ø11 mm holes.
Code T: Specialized tractor/forklift mounting patterns.
Drive Shaft Configurations:
P1 / P2: Plain parallel keyed shaft Ø16 mm or Ø18 mm with 5 mm or 6 mm key.
H: Rectangular 6-tooth spline (6×18×15 mm, 4 mm tooth width).
S: SAE 11-tooth involute spline (16/32 DP, 30° PA).
X: Metric 11-tooth involute spline (m=1.5, 30° PA).
Z: Conical taper shaft 1:8 or 1:10 with woodruff key and threaded nut.
B: Flat end / tang drive (width 8 mm or 10 mm) for direct engine gear coupling.
Port Formats:
Code F: Diamond 4-bolt flange pads (4-M8 on Ø38 mm bolt circle).
Code L: Threaded ports (Metric M20/M22/M24 or Gas ZG1/2", ZG3/4", ZG3/8").
Direction of Rotation:
R: Clockwise (viewed from drive shaft end, standard default).
L: Counter-clockwise (viewed from drive shaft end).
6.2 Target Brand Interchangeability Matrix
The HENGYUHANG CBN & CBT Series provides direct 1:1 functional, dimensional, and hydraulic replacement across major global agricultural, material handling, and industrial manufacturers:
YTO / Dongfanghong Tractors: Direct replacement for CBN-E310, CBN-E314, and CBN-F314 steering and implement pumps.
Foton Lovol / Weichai Tractors: Exact drop-in for CBT-F310, CBT-F316, and CBN-F320 main hydraulic pumps.
Heli & Hangcha Forklifts: 100% interchangeable with CBT-F314-AFH, CBT-F316-AFP, and CBT-F320-AFH mast lifting pumps.
Lonking, Liugong & XCMG Machinery: Direct replacement for auxiliary hydraulic implement pumps.
Changyuan & Hefei Wanyuan: Direct 1:1 replacement across all CBT-F3 and CBN-F3 series part numbers.
Shimadzu SGP1 & Kayaba KRP4: Functional and mounting replacement for Japanese forklift and tractor hydraulic circuits.
Casappa Polaris PLP20 & Marzocchi ALP2: Direct performance replacement in hydraulic power pack units.
Brand Replacement & Interchangeability
The HENGYUHANG CBN & CBT Series gear pump is built to exact international manufacturing standards, providing complete 1:1 mechanical and hydraulic replacement for original equipment pumps installed on YTO, Foton Lovol, Heli, Hangcha, Lonking, Changyuan, and Wanyuan machines. The precision-machined pilot spigots (Ø38 mm rectangular and Ø80 mm diamond), standardized bolt hole spacing, calibrated shaft extensions, and matching oil ports guarantee millimeter-accurate alignment.
Equipment operators, fleet maintenance departments, and aftermarket parts distributors can install HENGYUHANG pumps directly into tractors, forklifts, loaders, and hydraulic power units without modifying piping, brackets, or drive couplings. This drop-in interchangeability reduces machine downtime, lowers spare parts procurement costs, and ensures long-term operational productivity.
Applications
Agricultural Tractors & Harvesters: Hydraulic power supply for power steering circuits, three-point rear hitch lifters, and front-end loader attachments on 25–120 HP tractors.
Forklifts & Warehouse Stacking Equipment: Primary fluid power source for mast lifting cylinders, tilt cylinders, and side-shifter attachments on 1–5 ton diesel, gasoline, and electric forklifts.
Mini Excavators & Wheel Loaders: Dependable auxiliary gear pump powering pilot control systems, oil cooling circuits, and steering boosters.
Commercial Vehicle Tailgates & Dump Trailers: High-pressure hydraulic actuation for delivery truck tail lifts, small tipping trailers, and municipal utility vehicles.
Hydraulic Power Units (HPUs): Compact hydraulic pressure source for industrial AC/DC power packs, scissor lift tables, dock levelers, and car service hoists.
Forestry & Agricultural Implements: Hydraulic drive for wood log splitters, rotary seeders, forage harvesters, and fertilizer spreaders.
Package & Shipping
| Packaging Construction | Individual heavy-duty reinforced corrugated carton with custom-molded shockproof EPE foam inserts; batch wholesale shipments packed in standard export fumigation-free wooden crates |
| Corrosion Protection | Internal test fluid coating, external corrosion-inhibiting treatment, and heat-sealed vapor corrosion inhibitor (VCI) plastic enclosure |
| Port & Shaft Protection | Heavy-duty plastic protective caps for flange oil ports and threaded ports; rigid sleeve protection for drive shaft extensions |
| Individual Pump Weight | Lightweight and compact from 2.5 kg to 4.5 kg depending on displacement and flange configuration |
| Standard Dispatch Lead Time | Standard catalog models dispatched within 48–72 hours from warehouse inventory; volume custom OEM batches dispatched in 10–15 business days |
| Global Shipping Options | Air express delivery (DHL, FedEx, UPS, TNT) for urgent maintenance; Ocean container (FCL/LCL) and dedicated Air freight for volume commercial distributors |
| Export Documentation | Factory dynamometer quality inspection certificate, CE conformity documentation, and customized OEM private-label branding supported |
Why Choose Hengyuhang?
Direct Factory Precision Manufacturing & CNC Excellence: Manufactured in our modern production facility equipped with high-precision 4-axis and 5-axis CNC machining centers, automated high-speed gear hobbing machines, and precision gear tooth flank grinders (Ra < 0.2 μm) ensuring microscopic internal clearances, ultra-quiet operation, and peak volumetric efficiency.
100% Full-Cycle Multi-Parameter Factory Inspection: Every single pump is tested on computerized dynamometer test benches, verifying volumetric efficiency (≥90%–92%), flow output across rated rpm, continuous (20 MPa) and peak (25 MPa) pressure hold, internal leakage, and sound pressure levels. Zero untested units leave the factory.
Seamless 1:1 OEM Drop-In Interchangeability: Dimensionally and hydraulically calibrated to global industry standards, guaranteeing direct 1:1 mechanical drop-in replacement across YTO, Foton Lovol, Heli, Hangcha, Changyuan, and Shimadzu equipment without bracket or line modifications.
Flexible Engineering Customization & Rapid Prototyping: Backed by an experienced fluid power engineering team capable of customizing displacements, non-standard port orientations, special shaft extensions (tang, spline, taper, key), integrated relief valves, and dual-pump combinations with low MOQ requirements and rapid sample turnaround.
Robust Supply Chain, Extensive Inventory & Fast Global Dispatch: Substantial raw material inventory of extruded high-tensile aluminum profiles, precision gear blanks, and seal kits enables lightning-fast 48–72 hour dispatch for emergency breakdown replacements, supported by complete global export logistics.
12-Month Comprehensive Warranty & Lifetime Technical Support: All pumps are backed by our 12-month full-coverage manufacturer warranty against defects in materials and craftsmanship, supplemented by 24/7 technical consultation, 2D/3D CAD model verification, and dedicated fluid power engineering support.
HENGYUHANG Hydraulic Power Unit Gear Pump CBN/CBT Series (High-Pressure External Aluminum Hydraulic Gear Pump, 4.00~25.00 mL/r) is a heavy-duty, high-efficiency external hydraulic gear pump series engineered specifically for agricultural tractors, forklifts, hydraulic power packs (HPU), engineering machinery, mobile lifting equipment, and industrial automation hydraulic systems. Manufactured by Quanzhou Hengyuhang Power Technology Co., Ltd., the CBN and CBT Series feature a high-tensile extruded aluminum alloy body coupled with rigid front and rear end covers, high-precision case-hardened alloy steel gear sets, and heavy-duty composite DU self-lubricating sleeve bushings. Designed with dual axial clearance automatic compensation and radial hydraulic pressure balance mechanisms, the pump actively counteracts internal pressure differentials during heavy-duty operation, suppressing internal bypass leakage, minimizing mechanical friction, and sustaining superior volumetric efficiency (≥ 90%~92%) across extended high-pressure service lifespans. Equipped with high-performance fluororubber and high-temperature elastomeric seals, the CBN/CBT Series provides exceptional thermal stability and leak-free operation in harsh industrial environments. Operating at nominal continuous working pressures of 16 to 20 MPa (160~200 bar / 2,320~2,900 psi) and maximum peak pressures up to 25 MPa (250 bar / 3,625 psi), the series covers 8 standardized displacement sizes—4, 6, 10, 14, 16, 20, 22, and 25 mL/r—with drive speeds reaching up to 3000 r/min. Engineered with versatile mounting options including standard rectangular 4-bolt flanges (Code B, 70 × 100 mm with Ø38 mm pilot) and SAE 2-bolt diamond flanges (Code A, 109 mm bolt center with Ø80 mm pilot), diverse shaft extensions (straight keyed P/P1/P2, rectangular splined H, involute splined X/S, flat tang B, and tapered Z), and multi-standard fluid ports (metric split-flange F, metric threads M, BSPP/G, and NPT/PT), the CBN/CBT Series delivers an ultra-reliable, high-pressure fluid power solution for mobile and stationary machinery manufacturers worldwide.
| Applications
The CBN/CBT Series high-pressure gear pump is widely utilized across agricultural, material handling, construction, and stationary fluid power applications:
Agricultural Tractors & Harvesters: Supplies primary high-pressure hydraulic power for three-point hitches, hydraulic steering cylinders, front-end loader attachments, and combine header lift systems.
Industrial Forklifts & Material Handlers: Powers mast elevation, tilt cylinders, and side-shifter attachments on 1.5-ton to 3.5-ton diesel, LPG, and electric warehouse forklifts.
Hydraulic Power Packs (HPU) & Power Units: Serves as the central continuous-duty pressure pump in stationary and mobile hydraulic power packs for hydraulic presses, pipe benders, and log splitters.
Construction & Earthmoving Machinery: Operates auxiliary hydraulic circuits, stabilizer outriggers, mini excavator blade controls, and compact loader steering units.
Commercial Vehicle Tail Lifts & Dump Trailers: Delivers reliable, pulsation-free hydraulic power for truck tailboard lift mechanisms, hydraulic tipping beds, and mobile car haulers.
Industrial Machine Tools & Clamping Fixtures: Provides continuous high-pressure fluid supply for hydraulic chucks, workpiece clamping cylinders, and automatic tooling tables.
| Key Specifications Overview
| Parameter | Hengyuhang CBN / CBT Series Engineering Specification |
|---|---|
| Pump Classification | High-Pressure External Aluminum Hydraulic Gear Pump (CBN-300 / CBT-F3 Series) |
| Displacement Frame Ratings | 8 Standard Displacements: 4.0, 6.0, 10.0, 14.0, 16.0, 20.0, 22.0, and 25.0 mL/r (cc/rev) |
| Nominal Rated Operating Pressure | 20 MPa (200 bar / 2,900 psi / Grade F) for sizes 4~16; 16~20 MPa (160~200 bar) for sizes 20~25 |
| Maximum Peak Operating Pressure | 25 MPa (250 bar / 3,625 psi) for sizes 4~16; 20~25 MPa (200~250 bar) for sizes 20~25 |
| Volumetric Efficiency Rating | ≥ 90%~92% at rated operating speed and nominal pressure with dual axial and radial pressure balancing |
| Rotational Speed Range | Rated: 2000~2500 r/min; Maximum: 3000 r/min; Minimum: 600~800 r/min |
| Housing Construction | High-strength extruded aluminum alloy profile body with precision-machined heavy-duty front and rear end covers |
| Gears & Rotating Group | Module 3 (模数 3) case-hardened alloy steel precision gears with fine-ground tooth profiles for smooth meshing |
| Clearance Compensation Technology | Automatic axial clearance compensation and radial hydraulic balance structure to sustain long-term high volumetric efficiency |
| Sealing Technology | High-grade fluorocarbon (FKM/Viton) and high-temperature elastomeric seals designed for severe operating conditions |
| Mounting Flange Standards | Code B: Rectangular 4-bolt flange (70 × 100 mm bolt spacing, pilot Ø38 mm); Code A: Diamond 2-bolt flange (109 mm bolt center, pilot Ø80 mm) |
| Drive Shaft Configurations | Plain Keyed: P1 (Ø16 mm) / P2 (Ø18 mm); Splined: H (6×15×11.4 mm), X (11T m1.5 30°), S (SAE 11T 16/32DP 30°); Flat Tang: B (Ø15/Ø17.5 mm); Taper: Z (1:8 / 1:10) |
| Fluid Port Connections | Flange Ports: Code F (Ø38 mm bolt circle, 4-M8); Threaded Ports: Code L (Metric M18~M24, BSPP/G 3/8"~1/2", or PT/ZG) |
| Direction of Rotation | Clockwise (Code R / D, standard/default, omitted in code) or Counter-Clockwise (Code L / S, viewed facing drive shaft) |
| Unit Net Weight Range | 2.30 kg (Size 4) to 3.40 kg (Size 25) |
| Hydraulic Fluid Compatibility | Anti-wear mineral hydraulic oils (ISO VG 32, 46, 68; DIN 51524 HLP); Viscosity range: 15 to 250 mm²/s (cSt); Temp: -20°C to +80°C |
| Cleanliness Requirement | ISO 4406 Class 19/16 or NAS 1638 Class 10 (nominal 25 μm suction filtration recommended to protect bushings and gears) |
| Technical Performance Matrix Across Available Sizes
| Model Number (CBT-F3 / CBN-300) | Nominal Displacement (mL/r) | Operating Pressure (MPa) | Rotational Speed (r/min) | Theoretical Delivery Flow (L/min) | Volumetric Efficiency (≥ %) | Dimensions (mm) | Unit Mass (kg) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rated | Max. Peak | Min. | Rated | Max. | @ 2000 r/min | @ 2500 r/min | L1 (Center) | L2 (Total) | ||||
| CBT-F304 / CBN-304 | 4.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 8.00 | 10.00 | 90~91 | 44.0 / 43.3 | 92.0 / 93.0 | 2.30 |
| CBT-F306 / CBN-306 | 6.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 12.00 | 15.00 | 90~91 | 45.0 | 94.0 / 96.5 | 2.40 |
| CBT-F310 / CBN-310 | 10.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 20.00 | 25.00 | 91 | 48.5 / 48.0 | 101.0 / 102.5 | 2.60 |
| CBT-F314 / CBN-314 | 14.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 28.00 | 35.00 | 91 | 52.0 / 51.0 | 108.0 / 108.5 | 2.80 |
| CBT-F316 / CBN-316 | 16.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 32.00 | 40.00 | 91~92 | 55.0 / 53.0 | 110.0 / 112.5 | 2.90 |
| CBT-F320 / CBN-320 | 20.0 | 16~20 | 20~25 | 600 / 800 | 2000 / 2500 | 3000 | 40.00 | 50.00 | 91~92 | 56.5 | 117.0 / 119.5 | 3.10 |
| CBT-F322 | 22.0 | 20 | 25 | 600 | 2000 | 3000 | 44.00 | 55.00 | 91 | 60.5 | 125.0 | 3.25 |
| CBT-F325 / CBN-325 | 25.0 | 16~20 | 20~25 | 600 / 800 | 2000 / 2500 | 3000 | 50.00 | 62.50 | 91~92 | 60.5 / 60.0 | 125.0 / 123.0 | 3.40 |
| Mounting Flange, Shaft and Port Dimensional Standards
| Configuration Group | Standard Designation | Engineering Specifications & Dimensional Values |
|---|---|---|
| Rectangular Flange (Code B) | Rectangular 4-Bolt Flange (矩形法兰) | Bolt hole pattern: 70.0 mm horizontal × 100.0 mm vertical center spacing; 4 × Ø9.0 mm mounting holes; Centering pilot: Ø38.0 mm (f8 tolerance: -0.025 / -0.064 mm); Pilot step: 5.0 mm; Overall flange dimensions: 86.0 mm width × 116.0 mm height. Standard for tractor and forklift bell housings. |
| Diamond Flange (Code A) | Diamond 2-Bolt Oval Flange (菱形法兰) | Bolt center distance: 109.0 mm with 2 × 11.0 mm open mounting slots; Centering pilot: Ø80.0 mm; Flange width: 86.0 mm; Step height: 5.0 mm. Standard European agricultural machinery interface. |
| Plain Keyed Shafts (P / P1 / P2) | Cylindrical Keyed Shaft (平键) | P1: Ø16.0 mm (-0.02 mm) with 5.0 mm key (-0.03 mm), key length 25.0 mm, shaft extension 40 ±0.5 mm; P2: Ø18.0 mm (-0.02 mm) with 6.0 mm key (-0.03 mm), key length 25.0 mm, shaft extension 40 ±0.5 mm; CBN Standard: Ø16.0 mm with 5 × 28 mm drive key (GB1096-79), extension 36.0~40.0 mm. |
| Rectangular Splined Shafts (H) | Straight Sided Spline (矩形花键) | H: 6-Tooth rectangular spline (6 × 15 × 11.4 × 4 mm; tooth width 4.0 mm -0.03/-0.078 mm, major Ø15.0 mm -0.02/-0.04 mm, minor Ø11.4 mm); Spline length 25.0 mm, total extension 40 ±0.5 mm. High-torque direct coupling. |
| Involute Splined Shafts (X / S) | Involute Spline (渐开线花键) | Code X: 11-Tooth, Module 1.5, 30° pressure angle, major Ø18.0 mm (0/-0.13), minor Ø14.25 mm (0/-0.27), extension 40 ±0.5 mm; Code S (SAE 11): 11-Tooth, 16/32 DP, 30° pressure angle, major Ø18.0 mm (0/-0.13), minor Ø15.45 mm (-0.1/-0.2), extension 40 ±0.5 mm. |
| Flat Tang Shafts (B) | Flat End Coupling (扁键 / 扁口) | Code B: Direct-coupling flat tang drive shaft; Flat width 8.0~8.5 mm (-0.10 mm), shaft diameter Ø15.0 mm / Ø17.5 mm (-0.1 mm), flat extension length 10.0~15.0 mm. Fits directly into slotted electric motor driveshafts. |
| Tapered Shafts (Z) | Tapered Shaft with Threaded End (锥键) | 1:8 Taper: M12 × 1.5 threaded nose, 3 × 6.5 × 16 mm woodruff key (GB/T1098-2003), major taper Ø15.0 mm, extension 47.5 mm; 1:10 Taper: M10 × 1.25 threaded nose, 6 × 16 mm key (GB1096-79), major taper Ø18.0 mm, extension 31.0 mm. |
| Diamond Flange Ports (Code F) | Split Flange Connection (法兰连接) | Side port face: 4 × M8-6H threaded holes on Ø38.0 mm bolt circle (15 mm deep); Fluid bore d: Inlet Ø14 mm / Outlet Ø10 mm (sizes 4~6); Inlet Ø18 mm / Outlet Ø14 mm (sizes 10~25). Standard O-ring face seal. |
| Threaded Ports (Code L) | Metric & BSPP Threaded Ports (螺纹连接) | Metric: Sizes 4~6 (Inlet M20×1.5 / Outlet M18×1.5); Sizes 10~20 (Inlet M22×1.5 / Outlet M20×1.5); Sizes 22~25 (Inlet M24×1.5 / Outlet M22×1.5); BSPP / Gas: Inlet G 1/2" (or ZG 1/2") and Outlet G 3/8" (or ZG 3/8"). |
| Model Coding & Ordering Information
| Code Position | Code Designation | Standard Code Options | Technical Definition & Description |
|---|---|---|---|
| [1] Product Code | Pump Series Designation | CBT / CBN | External Hydraulic Power Unit & Tractor Gear Pump Series (CBT / CBN Architecture) |
| [2] Pressure Grade | Nominal Working Pressure | F / E | Code F: Nominal 20 MPa (Max 25 MPa); Code E: Nominal 16 MPa (Max 20 MPa) |
| [3] Gear Module | Gear Tooth Module | 3 | Module 3 (模数 3) precision case-hardened alloy steel gear group |
| [4] Nominal Displacement | Displacement Rating (mL/r) | 04, 06, 10, 14, 16, 20, 22, 25 | Nominal delivery capacity in mL/r (cc/rev) |
| [5] Mounting Flange Type | Mounting Flange Style | B (Standard) / A / T | Code B: Rectangular 4-bolt flange 70 × 100 mm (Omitted in standard code); Code A: Diamond 2-bolt flange; Code T: Special flange |
| [6] Fluid Port Connection | Inlet & Outlet Port Style | F (Standard) / L | Code F: 4-Bolt diamond flange connection on Ø38 mm circle (Omitted in standard code); Code L: Threaded port connection (Metric / BSPP / NPT) |
| [7] Drive Shaft Type | Input Shaft Configuration | P / H / B / S / X / Z | Code P: Plain keyed shaft; Code H: Rectangular spline; Code B: Flat end tang; Code S: SAE 11-tooth spline; Code X: Metric 11-tooth involute spline; Code Z: Tapered shaft |
| [8] Rotation Direction | Shaft Rotation Direction | R (Omitted) / L | Code R: Right / Clockwise rotation (standard, omitted in code); Code L: Left / Counter-Clockwise rotation (viewed facing drive shaft) |
| Technical Performance Matrix Across Available Sizes
| Model Number (CBT-F3 / CBN-300) | Nominal Displacement (mL/r) | Operating Pressure (MPa) | Rotational Speed (r/min) | Theoretical Delivery Flow (L/min) | Volumetric Efficiency (≥ %) | Dimensions (mm) | Unit Mass (kg) | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rated | Max. Peak | Min. | Rated | Max. | @ 2000 r/min | @ 2500 r/min | L1 (Center) | L2 (Total) | ||||
| CBT-F304 / CBN-304 | 4.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 8.00 | 10.00 | 90~91 | 44.0 / 43.3 | 92.0 / 93.0 | 2.30 |
| CBT-F306 / CBN-306 | 6.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 12.00 | 15.00 | 90~91 | 45.0 | 94.0 / 96.5 | 2.40 |
| CBT-F310 / CBN-310 | 10.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 20.00 | 25.00 | 91 | 48.5 / 48.0 | 101.0 / 102.5 | 2.60 |
| CBT-F314 / CBN-314 | 14.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 28.00 | 35.00 | 91 | 52.0 / 51.0 | 108.0 / 108.5 | 2.80 |
| CBT-F316 / CBN-316 | 16.0 | 20 | 25 | 600 / 800 | 2000 / 2500 | 3000 | 32.00 | 40.00 | 91~92 | 55.0 / 53.0 | 110.0 / 112.5 | 2.90 |
| CBT-F320 / CBN-320 | 20.0 | 16~20 | 20~25 | 600 / 800 | 2000 / 2500 | 3000 | 40.00 | 50.00 | 91~92 | 56.5 | 117.0 / 119.5 | 3.10 |
| CBT-F322 | 22.0 | 20 | 25 | 600 | 2000 | 3000 | 44.00 | 55.00 | 91 | 60.5 | 125.0 | 3.25 |
| CBT-F325 / CBN-325 | 25.0 | 16~20 | 20~25 | 600 / 800 | 2000 / 2500 | 3000 | 50.00 | 62.50 | 91~92 | 60.5 / 60.0 | 125.0 / 123.0 | 3.40 |
| Code Position | Code Designation | Standard Code Options | Technical Definition & Description |
|---|---|---|---|
| [1] Product Code | Pump Series Designation | CBT / CBN | External Hydraulic Power Unit & Tractor Gear Pump Series (CBT / CBN Architecture) |
| [2] Pressure Grade | Nominal Working Pressure | F / E | Code F: Nominal 20 MPa (Max 25 MPa); Code E: Nominal 16 MPa (Max 20 MPa) |
| [3] Gear Module | Gear Tooth Module | 3 | Module 3 (模数 3) precision case-hardened alloy steel gear group |
| [4] Nominal Displacement | Displacement Rating (mL/r) | 04, 06, 10, 14, 16, 20, 22, 25 | Nominal delivery capacity in mL/r (cc/rev) |
| [5] Mounting Flange Type | Mounting Flange Style | B (Standard) / A / T | Code B: Rectangular 4-bolt flange 70 × 100 mm (Omitted in standard code); Code A: Diamond 2-bolt flange; Code T: Special flange |
| [6] Fluid Port Connection | Inlet & Outlet Port Style | F (Standard) / L | Code F: 4-Bolt diamond flange connection on Ø38 mm circle (Omitted in standard code); Code L: Threaded port connection (Metric / BSPP / NPT) |
| [7] Drive Shaft Type | Input Shaft Configuration | P / H / B / S / X / Z | Code P: Plain keyed shaft; Code H: Rectangular spline; Code B: Flat end tang; Code S: SAE 11-tooth spline; Code X: Metric 11-tooth involute spline; Code Z: Tapered shaft |
| [8] Rotation Direction | Shaft Rotation Direction | R (Omitted) / L | Code R: Right / Clockwise rotation (standard, omitted in code); Code L: Left / Counter-Clockwise rotation (viewed facing drive shaft) |
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