HW-32/50A-3 Series Gear Pump

Overview

This series of gear pumps adopts aluminum alloy die-casting pump body, and the radial seal adoptstooth top seal;

The axial seal adopts a floating pressure side plate. This pump has the characteristics of smallvolume, light weight, and high efficiency.

Features and Benefits

• Smart Sealing: Features floating pressure-compensation plates that auto-adjust clearances to minimize internal leakage.

• Light & Tough: Built with high-strength die-cast aluminum alloy, offering a compact, lightweight, and high-pressure-resistant body.

• Direct Drop-in: Fully compatible with classic Russian NSH-32/50 standards and available in both clockwise and counter-clockwise rotations.

  
  

• High & Stable Efficiency: Delivers exceptional volumetric efficiency and consistent power output even under high-pressure and high-temperature conditions.

• Plug-and-Play Savings: Allows direct replacement on machinery (like MTZ tractors) without any costly modifications or custom brackets.

• Extended Lifespan: Advanced axial and tooth-tip sealing designs drastically reduce wear and tear, lowering overall maintenance costs.

Model Codes

Applications

• Agricultural Machinery (Core Application): Primarily powers MTZ Belarus tractors (e.g., MTZ-80/82/1221) and harvesters (e.g., DON series) to drive three-point hitches, auxiliary steering, and implement controls.

• Construction & Road Equipment: Widely used in mid-sized excavators, wheel loaders, and motor graders (e.g., DZ-98) to operate hydraulic arms, buckets, and blades.

• Dump Trucks & Heavy Commercial Vehicles: Integrates into the hydraulic systems of MAZ, KamAZ, and URAL trucks to supply high-pressure fluid for telescopic dumping cylinders.

• Industrial Auxiliary Systems: Serves as the central fluid power source for stationary hydraulic power packs (HPUs), compactors, and industrial lift platforms.

Packaging & Delivery

Gear Pumps are typically packaged securely to prevent damage during transit. The packaging includes:

Protective Wrapping: To safeguard the high-precision pump body and shaft from moisture and environmental damage.

Custom Cartons or Crates: Individual reinforced packaging with shock-absorbent inserts for single pumps, and sturdy wooden crates for bulk or tandem pump orders to ensure safe handling.

Documentation: Includes technical data sheets, installation guides, and quality inspection certificates.

Delivery time depends on the specific model, port configurations, and destination but typically ranges from 1 to 4 weeks from the order date.

HW-32/50A-3 Series Gear Pump FAQ

1: Can this pump directly replace legacy Russian NSH (НШ) pumps?

• HW-32A-3 replaces the traditional Russian NSH-32 (НШ-32).

• HW-50A-3 replaces the traditional Russian NSH-50 (НШ-50).

• All mounting flanges, shaft splines, and port dimensions match NSH standards perfectly, requiring zero modifications.

2: How do I tell "Left-Hand" apart from "Right-Hand" rotation? What if I choose wrong?

• Identification: Look straight at the drive shaft end. Clockwise rotation means Right-Hand (R), and counter-clockwise means Left-Hand (L).

• Consequences: Selecting the wrong rotation will prevent the pump from sucking oil. It will run dry and burn out the internal seals within minutes.

3: What is the "Floating Pressure Compensation Plate" and its main benefit?

• Mechanism: Internal side bushings automatically adjust their position using real-time system pressure to stay tightly pressed against the gear faces.

• Benefit: It minimizes internal volumetric leakage, ensuring the pump delivers a steady, powerful hydraulic output even under continuous high temperatures and heavy workloads.

4: What are the rated operating pressures and displacements of this series?

• Rated Pressure: 16 MPa (160 bar / ~2320 psi).

• Nominal Displacement:

• 32 Model: 32 ml/r (milliliters per revolution).

• 50 Model: 50 ml/r (milliliters per revolution).

5: Why is my newly installed pump overheating or making excessive noise?

• Aeration (Cavitation): Air leaking through loose inlet pipe joints or a clogged filter causes severe noise and vibration.

• Contaminated Fluid: Dirty hydraulic oil scratches the tooth tips or compensation plates, leading to internal pressure leakage and heat buildup.

• Misalignment: The pump shaft is not perfectly aligned with the driving shaft, creating harsh mechanical friction.

FAQ

1.How does the variable displacement work?

The pump's flow is adjusted by changing the angle of an internal swash plate. As the swash plate angle changes, the stroke length of the pistons varies, which in turn changes the volume of fluid displaced per rotation, allowing the flow rate to adapt to the system's needs.

2.What's our advantages?

Factory established in 2005;

With a great deal of production experience;

80+ employees become the professional team;

Constant updated ERP system ensure efficiency of work;

Sophisticated equipment ehanced the accuracy of products;

Professional salesmen provide the greast service;

With a large number of famous customers all over the world;

Great after-sales service;

With the long term cooperation with famous logistics and express company in China,provide the better goods service.

3.What is your payment terms?

Small order/sample order,full payment in advance; Big orders send the first payment 30% before the production,and the balance before shippment.We'll show the photos of the products and packages before delivery.

4.Can you make my own brand on the products?

Of course we can. Just send me your logo  we can make it for you.

5.What is our main export market?

America(40.5%): USA, Canada, Argentina, Brazil

Europe(30.8%): Italy,Germany,England,Holland,Spain,Swiss,Finland,Russia,Poland.

Asia(23.5%): Korea,singapore,India,Turkey,Vietnam,Saudi Arabia,Syria, Israel,Lebanon.

Others(5.8%).

The Green hydraulic pump manufacturing facility is a specialized industrial plant that focuses on producing hydraulic pumps and related components.

These factories are equipped with advanced machinery and technology to fabricate high-quality pumps designed for a wide range of applications,

from heavy equipment and machinery to automotive and industrial systems.

The production process typically involves precision engineering, where raw materials like metals and alloys are processed into pump components such as gears, pistons, cylinders, and seals. These parts are then assembled into fully functional hydraulic pumps, which are tested for performance and quality control to ensure reliability, efficiency, and durability under various working conditions.

Green Hydraulic's manufacturing facilities for hydraulic pumps maintain stringent quality standards,

often adhering to international certifications, to meet the expectations of customers in industries such as construction,

agriculture, automotive, and manufacturing.

All hydraulic pumps produced by Green Hydraulic have undergone compliance testing, ensuring their quality and reliability.

To meet the diverse needs of different industries, the green hydraulic offer customization options, such as specialized seals, materials, and pump configurations. These facilities often work closely with engineering teams to develop tailored solutions for specific applications, from high-pressure systems to low-flow, high-efficiency pumps.

Each pump undergoes a rigorous quality control process, where pressure tests and performance assessments are conducted to ensure that the pumps meet the required standards for flow rate, pressure capacity, and durability.