Marzocchi GHP2A-D-16 Hydraulic Gear Pump | GHP Series Group 2 | High Pressure Aluminum Pump

The GHP2A-D-16 high-pressure gear pump from Chengyuan Hydraulic is a high-performance power component fully compatible with Marzocchi GHP series standards. Part of the Group 2 (Group 2) frame size, this pump features a reinforced aluminum alloy body paired with specially treated flanges. The core advantage of the GHP series is its axial clearance compensation system designed for heavy-duty applications. For the GHP2A-D-16 model, we employ ultra-precision ground gears to ensure minimal noise levels even at high pressures. Every pump undergoes 100% simulated condition testing before delivery to verify that volumetric efficiency and rated pressures match OEM standards, ensuring 100% original-place interchangeability.

Technical Specifications :

• Model Number: GHP2A-D-16

• Frame Group: Group 2

• Displacement: 11.5 cm³/rev

• Rated Pressure (P1): 260 bar (26 MPa)

• Intermittent Pressure (P2): 275 bar (27.5 MPa)

• Peak Pressure (P3): 290 bar (29 MPa)

• Maximum Speed: 3500 rpm

• Minimum Speed: 700 rpm

• Rotation: D (Clockwise, viewed from shaft end)

• Mounting Flange: A (Standard European 4-bolt)

• Shaft Type: Standard Tapered (1:8) or optional Splined shaft

• Ports: Threaded or Flange options compliant with GHP standards

Key Technical Advantages:

• Enhanced Axial Compensation: The GHP series utilizes specialized floating bushings that automatically adjust clearances against gear faces based on system pressure. This mechanism maintains volumetric efficiency above 95% even under continuous 260 bar operation by minimizing internal leakage.

• High-Strength Material Pairing: The body is crafted from a special high-tensile extruded aluminum alloy, while the front and rear covers are made of cast iron or reinforced aluminum to resist fatigue cracks under high-pressure pulses, significantly extending operational life.

• Low Noise Gear Craftsmanship: Using a 12-tooth precision-ground gear set optimizes the contact ratio and reduces flow pulsation. Combined with the vibration-damping properties of the aluminum body, the GHP2A remains smooth and quiet even at high speeds.

• Exceptional Thermal Stability: By optimizing the sealing chamber and utilizing high-grade seals, this pump operates reliably across a wide temperature range, making it ideal for both mobile machinery and industrial power units regardless of fluid viscosity fluctuations.

Application Areas:

• Agricultural Machinery: Tractor lift systems and combine harvester auxiliary steering.

• Mobile Equipment: Forklift hydraulic units and compact wheel loaders.

• Industrial Automation: Aluminum extrusion presses and compact hydraulic lifting platforms.

Expert Maintenance Tips:

• Initial Priming: While the GHP series has some dry-start resistance, we strongly advise filling the pump with clean hydraulic oil through the inlet before first use to protect the bushings and gears during startup.

• Temperature Regulation: Maintain oil temperature between 30°C and 65°C. Operating above 80°C for extended periods will accelerate seal degradation and reduce volumetric efficiency.

• Suction Filter Maintenance: To protect the precision compensation bushings, use a filter of 25μm or better on the inlet and check regularly to prevent excessive vacuum and cavitation.