Gear oil pump QX Series QX43-032/43-020R

二、Product Description

The premium Gear Pump Gear oil pump QX Series QX43-032/43-020R is developed by Hengmeisi, a professional China manufacturer and factory direct supplier, specially engineered as tandem double gear pump to replace two separate single pumps in traditional dual-loop hydraulic systems. Featuring independent 32ml/r &20ml/r dual displacement layout, 245bar continuous working pressure, separate flow output for two hydraulic loops, low flow fluctuation ≤1.8%, compact one-piece pump housing to save installation space for multi-action heavy machinery hydraulic configuration.

三、Product Advantages

1. Tandem Dual-Pump Integrated vs Two Separate Single Gear Pump Design

Unlike matching two independent single pumps for double oil circuit, Gear Pump QX43-032/43-020R adopts monoblock tandem housing structure, two sets of gear assemblies share one input drive shaft. It cuts connecting flange, coupling and extra pipeline cost, reduces system failure points caused by multi-pump assembly errors.

2. Independent Dual Oil Circuit Separate Pressure Control

Front 32cc & rear 20cc pump chambers are fully isolated inside pump body, two loops can set different working pressure individually. One circuit for main actuating movement, another for auxiliary clamping/steering action, perfect for equipment requiring synchronous multi-group hydraulic action.

3. Customized Heavy-Duty Wear Resistance Formulation

Gear & drive shaft: Ultrahigh-strength alloy steel, carburizing & cryogenic tempering treatment, surface precision grinding;Floating side plate: Bimetallic copper-steel composite sheet, resistant to abrasive hydraulic oil with tiny impurity;Sealing set: Fluorine composite seal, stable sealing from -25℃ to +115℃ under full 280bar peak pressure;Bearing: Double-row spherical roller bearing, sustain heavy radial load at max 3000r/min, service life up to 18000 working hours.

4. Built-in Split Pressure Relief Optional Structure

Optional independent overflow valve pre-installed on each pump cavity respectively, no need external valve block installation, shorten hydraulic oil pipeline and effectively lower pipeline leakage rate of dual-circuit system.

四、Model Code

The coding rule of QX43-032/43-020R is intuitive for overseas buyers to read configuration without professional hydraulic expertise:

QX43：High-pressure tandem double gear pump core series, differs from QX33 single pump series;

032：Front pump displacement:32ml/r for large-flow main hydraulic loop;

/43-020：Rear pump displacement:20ml/r for small-flow auxiliary hydraulic loop;

R：Right clockwise rotation; Left rotation (L) can be customized per client’s installation requirement.

As flagship tandem model of QX43 series, QX43-032/43-020R is exclusively optimized for dual-loop heavy-load hydraulic working conditions, widely stocked and purchased by global machinery manufacturers for construction and mining supporting equipment.

五、Product Structure

1.Core Architecture: Monoblock Tandem Dual Gear Core Structure

Different from split combined double pump, Gear Pump QX43-032/43-020R uses integrated cast pump shell, two independent meshing gear groups coaxially arranged inside one housing to realize dual-flow output synchronously.

2.Dual Isolated Cavity Layout

Internal partition baffle completely separates front and rear pump chambers, hydraulic oil of two loops never cross-contaminate, ensuring independent pressure regulation for each circuit.

3.Upgraded Anti-impact Material Matching

Cryo-treated alloy gear + bimetallic wear-resistant side plate + fluorine high-temperature resistant sealing assembly, superior anti-fatigue performance under frequent pressure shock of engineering machinery.

4.Compact Coaxial Drive Design

Single input shaft drives two sets of gears simultaneously, shorter overall body size, easy to install in narrow engine compartment of mobile construction equipment.

六、Application Scenarios

Target Application Fields of QX43-032/43-020R Dual Gear Pump

1.Construction Machinery: Medium-sized wheel loader, road paver, telescopic forklift, compact excavator
2.Mining Auxiliary Equipment: Underground coal feeder, small hydraulic drill rig, mine transport vehicle
3.Industrial Heavy Machinery: Dual-loop hydraulic press, large automatic packaging production line
4.Agricultural Large Equipment: Big combine harvester, heavy-duty farm tractor with multi-function attachment
5.Special Vehicle: Sanitation garbage truck, aerial lifting working truck hydraulic power system