Marzocchi GHP Series Ultra-High Pressure Gear Pumps: Specifications, Models & Applications

The Marzocchi GHP series ultra-high pressure gear pumps feature a displacement range of 0.19 cm³/rev to 200.3 cm³/rev, comprehensively encompassing the displacement intervals of three sub-series, namely GHP1, GHP2, and GHP3. Each sub-series is engineered to meet specific flow and pressure requirements for diverse hydraulic system applications.

GHP Series Sub-Series Specifications

• GHP1 Series: Boasts a displacement range of 1.4 cm³/rev to 13.8 cm³/rev, specifically designed for low-flow, high-pressure hydraulic systems. It delivers reliable performance in scenarios requiring precise low-volume fluid delivery under high pressure.
• GHP2 Series: Offers a displacement range of 4.5 cm³/rev to 50 cm³/rev, with certain models (e.g., GHP2A-D-50-FG) capable of reaching 50 cm³/rev or higher. This series is ideal for medium-flow, high-pressure hydraulic systems, balancing flow rate and pressure stability.
• GHP3 Series: Covers a displacement range of 20 cm³/rev to 87 cm³/rev, with extended-displacement models like GHP3-D-135 exceeding 87 cm³/rev. It is tailored for large-flow, high-pressure hydraulic systems, ensuring efficient fluid transfer in heavy-duty operations.

Core Parameters & Structural Features

Pressure Rating

The GHP series gear pumps deliver exceptional pressure performance: maximum continuous operating pressure of 280 bar, maximum intermittent pressure of 295 bar, and peak pressure up to 310 bar. This pressure capability fully meets the demands of ultra-high pressure hydraulic systems across industries.

Speed Range

Speed capacity varies by sub-series to match application needs: GHP1 series achieves a maximum speed of 6000 rpm, GHP2 series tops out at 4000 rpm, and GHP3 series reaches a maximum speed of 3500 rpm. This tiered speed design ensures optimal efficiency for different flow and load requirements.

Structural Advantages

The pump body is constructed from high-strength aluminum alloy, with flanges and covers made of ductile iron, effectively resisting deformation under high pressure. The sealing system adopts a double-lip sealing ring paired with an elastic fixing ring, enhancing adaptability to harsh and complex working conditions. Additionally, the integrated compensation system reduces internal leakage through axial and radial free movement of the bushing, maintaining high volumetric efficiency.

Application Scenarios

Widely applied in ultra-high pressure fields such as industrial testing machinery, hydraulic cutting equipment, and shoemaking machinery. Select models support extreme temperature operations (-40°C to +120°C) and compatibility with corrosive media, expanding their usability in challenging environments.

Common Models & Special Variants

GHP1 Series Common Models

GHP1, GHP1-T, GHP1-MU, GHP1A, GHP1AD-2, GHP1AD-3, GHP1AD-4, GHP1AD-5, GHP1AD-6, GHP1AD-7, GHP1AD-9, GHP1AD-11, GHP1AD-13, GHP1AD-16, GHP1AD20, etc.

GHP2 Series Common Models

GHP2, GHP2-T, GHP2-MU, GHP2A, GHP2A-KA, GHP2AD-6, GHP2AD-9, GHP2AD-10, GHP2AD-12, GHP2AD-13, GHP2AD-16, GHP2AD-20, GHP2AD-22, GHP2AD-25, GHP2AD-30, GHP2AD-34, GHP2AD-37, GHP2AD-40, GHP2AD-50, etc.

GHP3 Series Common Models

GHP3, GHP3-MU, GHP3A, GHP3A-MU, GHP3A2, GHP3BK1, GHP35, GHP3-D-30, GHP3-D-33, GHP3-D-40, GHP3-D-50, GHP3-D-60, GHP3-D-66, GHP3-D-80, GHP3-D-94, GHP3-D-110, GHP3-D-120, GHP3-D-135, etc.

Special Model Series

• GHPID Series: GHPID2, GHPID3, GHPID4, GHPID-5, GHPID6, GHPID7, etc.
• GHPBK Series: GHP2BK1-D6, GHP2BK1-D9, GHP2BK1-D-10, etc.

Marzocchi GHP series gear pumps are renowned for their durability, high-pressure resistance, and versatile performance, making them a preferred choice for industrial and mobile hydraulic applications worldwide.