CBTLZTD-F/F Dual External Gear Pump
2 week ago
Product details
CBTLZTD-F/F Dual External Gear Pump Full Product Introduction
1. Basic Product Overview
CBTLZTD-F/F Dual External Gear Pump is a classic medium-high pressure coaxial dual combined hydraulic gear pump , specially optimized for forklifts, small loaders and light construction machinery. It integrates two independent external meshing gear assemblies in one heavy-duty integrated housing, sharing a single drive shaft to realize one power input with two fully isolated hydraulic oil outputs. The marking F/F means both front and rear pump sections adopt identical F pressure grade (20MPa rated pressure), mostly configured as large-displacement main lifting pump + small-displacement steering/pilot auxiliary pump. It replaces two separate single gear pumps to simplify piping layout and save installation space, serving as OEM original parts and aftermarket replacement spare parts for industrial vehicles, agricultural machinery and sanitation equipment .
Model Code Interpretation
- CBTLZT: Base series code for forklift dedicated external gear pump
- D: Upgraded reinforced structural version, enhanced anti-vibration & anti-impact performance
- F/F: Dual pump both with F pressure rating (20MPa), flange-type oil port connection for both sections
- Optional configurations: plain key / rectangular spline / SAE involute spline shaft; clockwise (R) / counterclockwise (L) rotation; customizable displacement pairing for front & rear pump
2. Core Technical Parameters
Item Specification
Product Type Coaxial Dual Combined External Meshing Hydraulic Gear Pump
Rated Working Pressure Both sections: 20MPa (200bar)
Peak Instant Pressure Both sections: 25MPa (250bar)
Operating Speed Range 600–3000rpm
Displacement Combination Customizable pairing (common specs: 20/10,25/16,32/20,40/25 mL/r)
Housing Material High-strength cast iron front body + die-cast aluminum alloy rear cover
Core Internal Structure Floating side plate axial clearance auto-compensation, radial hydraulic asymmetric balance, DU self-lubricating composite bearings
Sealing Parts HNBR nitrile rubber seals (standard); FKM high-temperature oil-resistant seals (optional)
Applicable Hydraulic Fluid ISO VG46 / VG68 anti-wear hydraulic oil
Working Temperature -20℃ ~ +90℃
Mounting Form Standard diamond A-type flange mounting, direct drive via engine PTO
Volumetric Efficiency ≥92% for both pump sections
Warranty Period 1 year
3. Working Principle
1. External power drives the shared main shaft to rotate synchronously, two gear sets rotate simultaneously to form negative pressure in respective suction cavities, drawing hydraulic oil from the shared oil tank.
2. The large-displacement pump section delivers high-flow pressurized oil to drive lifting, tilting hydraulic cylinders for main heavy-load operations; the small-displacement section supplies stable constant flow for hydraulic steering, pilot valve control and gearbox lubrication auxiliary circuits.
3. Each pump unit is equipped with floating side plate compensation: system hydraulic pressure pushes side plates to closely fit gear end faces, automatically offset axial wear clearance, minimize internal leakage and maintain high efficiency during long continuous operation.
4. Two hydraulic oil passages are completely sealed and isolated without cross oil leakage, enabling synchronous operation of main and auxiliary machine functions; return oil from two branches converges back to the oil tank to complete full hydraulic circulation.
5. Integrated coaxial design eliminates redundant brackets and couplings, reducing mechanical friction loss compared with two discrete single pumps installation.
4. Key Product Advantages
1. Cast iron-aluminum composite housing balances structural rigidity and lightweight design, strong shock resistance and overload capacity, adapting to bumpy working conditions of forklifts and off-road machinery[(Ningbo Hen...)].
2. Dual F-grade identical pressure design ensures consistent pressure stability of two circuits, easy matching of main lifting + steering dual loops with simple system debugging.
3. Radial hydraulic balance + DU self-lubricating bearings reduce gear eccentric wear, excellent anti-pollution performance tolerating tiny impurities mixed in onsite hydraulic oil.
4. Mature floating side plate compensation technology slows efficiency attenuation after long-hour continuous operation, effectively preventing overall hydraulic system pressure drop.
5. Standard diamond flange installation and multiple shaft types fully interchangeable with mainstream OEM forklift pumps, supporting plug-and-play replacement without modifying original mounting structure.
6. Compact overall size fits narrow installation space of forklift engine compartments, rich displacement combinations support personalized equipment modification.
5. Typical Application Scenarios
1. Core dual-circuit hydraulic power pump for 1–5 ton internal combustion/electric forklifts hydraulic system: main pump for fork lifting & tilting, auxiliary pump for hydraulic steering ;
2. Hydraulic power assembly for mini wheel loaders, small dumper trucks and road sweepers;
3. Matching hydraulic component for small combine harvesters and garden agricultural machinery;
4. Portable hydraulic power stations, small special engineering vehicle hydraulic systems;
5. Old equipment renovation: replace scattered single pumps to streamline overall hydraulic piping layout.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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