HGP-3A Gear Pump Hydraulic
3 week ago
Product details
1. Basic Overview
The HGP-3A is a mainstream high-displacement model of high-pressure fixed-displacement hydraulic gear pumps in the HGP series. It inherits the durable cast-iron structure of the HGP lineup, featuring higher maximum displacement and pressure tolerance than the HGP-2A. It fits medium-to-large hydraulic power units, forklifts and main oil supply circuits of construction machinery, and serves as a common base unit for tandem gear pumps (two units can be coaxially assembled into a dual pump matching the tandem structure in your first photo).
HGP-3A Hydraulic Gear Pump is a reliable fixed-displacement Hydraulic gear pump. As a widely used power-type hydraulic pump, it serves as the energy supply component for various hydraulic system. This Hydraulic gear pump utilizes meshed gear sets to deliver continuous fluid delivery. It converts rotational mechanical energy into hydraulic pressure energy and supplies steady pressurized oil flow to the hydraulic system. Featuring mature external gear structure, this hydraulic pump offers stable oil supply for general industrial machinery and mobile equipment hydraulic system under medium-pressure operating conditions.
2. Core Structural Components
1. Pump Housing: Integrally cast from high-strength cast iron, resistant to high-pressure impact and vibration for continuous heavy-duty outdoor operation.
2. Precision Gear Pair: Widened meshing gears deliver higher volumetric efficiency, lower noise and slower wear under large-flow operation.
3. Shaft & Seal Assembly: Thickened oil-resistant skeleton oil seals paired with wear-resistant bushes deliver better leak resistance under high pressure than the HGP-2A; standard flange shaft ends enable universal motor mounting.
4. Oil Ports: Large-diameter inlet/outlet ports support high-flow transmission, with threaded and flanged connection options.
3. Key Performance Parameters (General Industrial Specifications)
Parameter Standard Range Notes
Rated Working Pressure 21MPa Short-term peak pressure up to 25MPa
Displacement Range 10~30mL/r Wider gear options than HGP-2A for higher flow demands
Applicable Rotation Speed 600~3200r/min Compatible with standard three-phase motors and internal combustion engine drives
Mounting Style Horizontal flange mount, available as standalone single pump or coaxially tandem dual pump
Compatible Fluid ISO-standard anti-wear hydraulic oil, operating temperature: -10℃~80℃
4. Working Principle
The motor spins the driving gear to mesh and rotate the driven gear. The expanding suction chamber generates negative pressure to draw hydraulic oil from the tank; oil trapped between gear teeth is carried to the pressure chamber, where volume shrinkage compresses oil for high-pressure delivery. An external relief valve caps the maximum system pressure. The widened gear design delivers far higher flow at identical rotational speed compared to the HGP-2A.
5. Core Advantages
1. High Flow & Pressure Capacity: Larger displacement and pressure headroom act as the main supply pump for equipment without parallel installation of multiple small pumps.
2. Strong Expandability: Used alone or coaxially paired for FG-series tandem dual pumps to feed two independent oil circuits.
3. Durable & Maintainable: Shock-resistant cast iron housing; common wearable parts (oil seals, bearings) have abundant low-cost domestic replacement stock.
4. Stable Operation: Smoother meshing of widened gears cuts heat rise and noise during prolonged heavy-load running.
6. Typical Application Scenarios
Main hydraulic systems of medium-sized forklifts/loaders, high-tonnage hydraulic stations for lifting elevators, multi-station machine tool clamping fixtures, hydraulic circuits for sanitation sweepers, agricultural machinery hydraulics, auxiliary oil supply modules for construction machinery.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
Audited supplier
4 year
Main Product:
hydraulic motor,
gear box,
hydraulic pump,
hydraulic valve ,
hydraulic winch ,
hydraulic system