Gear oil pump QX Series QX31-032/33-012R

Product Description

The premium Gear oil pump QX Series QX31-032/33-012R dual internal gear pump from Hengmeisi – a leading China manufacturer and factory direct supplier – replaces outdated external gear pumps. This dual-displacement model combines 32cc and 12cc flow sections in one compact unit, offering superior versatility, efficiency, and durability for variable-load hydraulic applications.

Product Advantages

Internal Gear vs. External Gear Pump Designs

Unlike conventional external gear pumps, the QX31-032/33-012R uses precision internal gear technology to eliminate dead zones, reduce leakage, and minimize flow pulsation. This design delivers smoother, quieter operation at higher pressures, cutting energy waste and reducing wear on system components.

Asymmetric Dual-Displacement Configuration

The 32cc/12cc split design provides flexible flow control: the 32cc section handles high-flow, low-demand tasks independently, while both sections combine for high-pressure, low-flow operations. This adaptability eliminates unnecessary power draw and heat buildup compared to fixed-displacement alternatives.

Premium Materials for Harsh Environments

Gears & Housing: High-grade alloy steel, heat-treated and precision-ground for maximum wear resistance and structural integrity.

Sealing System: High-performance elastomers rated for -30℃ to +115℃, ensuring leak-free performance under extreme conditions.

Bearings: Precision components engineered for continuous operation up to 4200 r/min, supporting both radial and axial loads.

Built-In Contamination & Cavitation Control

Optimized internal flow paths reduce turbulence and cavitation, protecting the pump from damage due to fluid starvation. Integrated filtration zones trap impurities, safeguarding critical components and ensuring long-term reliability in dirty industrial environments.

Model Code Explanation

The QX31-032/33-012R features a clear naming convention for easy identification:

• QX31: Series identifier for high-pressure internal gear pumps.

• 032/012: Dual pump displacements (32cc/rev and 12cc/rev), highlighting its split-flow capability.

• R: Right-hand rotation, ensuring compatibility with standard system configurations.

This pump is optimized for compact, low-noise, and energy-efficient scenarios, making it a preferred choice for global buyers in material handling, machine tools, and mobile machinery.

Product Structure

1.Core Architecture: Precision Internal Gear Set

Tight-tolerance internal/external gear pairs eliminate high wear and pulsation common to external gear pumps, ensuring smooth, consistent flow.

2.Dual Pump Mechanism: Adaptive Split-Flow Operation

Independent pump sections allow the system to switch between low and high flow modes, adjusting effective displacement to match load demands.

3.Material Upgrades for Harsh Conditions:

◐ Gears & Housing: Hardened alloy steel for superior wear and impact resistance.

◐ Seals: High-performance compounds with wide temperature and chemical compatibility.

4.Enhanced Protection & Reliability:

Optimized inlet geometry and built-in filtration prevent blockages and wear, ensuring consistent performance in dirty industrial conditions.

Application Scenarios

Material Handling: Forklifts, scissor lifts, and pallet jacks requiring compact, reliable power units.

Machine Tools: Hydraulic power units for presses, lathes, and injection molding machines.

Construction & Agriculture: Small excavators, tractors, and auxiliary hydraulic systems.

General Industrial: Hydraulic power packs, conveyor systems, and process equipment prioritizing low noise and efficiency.