Marzocchi Gear pump

Marzocchi is a well-known Italian manufacturer of hydraulic components, and its gear pump series is famous for high accuracy, reliability and compact design, widely used in industrial hydraulic, machine tools, injection molding machines, engineering machinery and other fields. The following is an overview of the main series specifications and key parameters of Marzocchi gear pump:

1、 Classification of main series
Marzocchi gear pump can be divided into the following core series according to structure and working characteristics:

ALP series (light aluminum alloy gear pump)
Features: Lightweight aluminium alloy housing for low to medium pressure applications (typically ≤ 250 bar).
Discharge range: 0.16 cm ³/rev to 16 cm ³/rev.
Application: machine tool, automation equipment, light hydraulic system.
ALH series (high pressure aluminum alloy gear pump)
Feature: reinforced aluminium construction for higher pressures (up to 350 bar).
Discharge range: 0.5 cm ³/rev to 10 cm ³/rev.
Application: injection molding machine, die casting machine, high pressure hydraulic system.
GHP series (high pressure cast-iron gear pump)
Features: Cast iron housing, high pressure (up to 400 bar), suitable for heavy duty service.
Discharge range: 1.6 cm ³/rev to 25 cm ³/rev.
Application: engineering machinery, metallurgical equipment, ship hydraulic system.
GHP-E series (economical high-pressure pump)
Features: Optimized cost design, considering performance and economy.
Discharge range: 2.5 cm ³/rev to 16 cm ³/rev.
Application: general industrial equipment, agricultural machinery.
GHP-T series (dual/triple pump)
Characteristics: multi-pump combination design, realizing multi-channel independent oil supply.
Discharge combination: customized according to demands (e.g. GHP-T 2+2 cm ³/rev).
Application: complex hydraulic systems (such as machine tool multi-axis control).
2、 Key technical parameters
Typical range of parameters
Working pressure light series: ≤ 250 bar; High-pressure series: ≤ 400 bar
Speed range 500-4000 rpm (depending on model)
Medium temperature – 20 ° C to+100 ° C (up to 150 ° C for special models)
Viscosity range 10-400 cSt (Recommended 50-150 cSt)
Noise level ≤ 70 dB (A) (according to model and working condition)
Installation mode Flange type, axial installation, SAE flange, etc

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3、 Key points of model selection
Displacement matching: select the appropriate displacement according to the system flow demand to avoid the efficiency reduction caused by too large or too small.
Pressure class: confirm the maximum working pressure of the system and select the pump type corresponding to the pressure class (e.g. ALP vs. GHP).
Speed range: match the motor speed to ensure that the pump operates in the high efficiency area.
Medium compatibility: confirm hydraulic oil type (mineral oil, synthetic oil, etc.) and temperature range.
Installation interface: select flange, axial or SAE interface according to equipment space.
4、 Typical application scenarios
Industrial automation: ALP series is used for clamping/loosening of CNC machine tools.
Injection molding: ALH series provides high pressure melt adhesive injection power.
Construction machinery: GHP series driving hydraulic cylinder for excavation and lifting.
Ship hydraulic: GHP-T multi-split pump realizes coordinated control of steering engine and windlass.
5、 Notes to note
Avoid dry running: the gear pump shall be fully lubricated and the system shall be filled with oil before startup.
Regular maintenance: check the oil cleanliness and replace the filter element regularly.
Temperature control: heat dissipation shall be strengthened in high temperature environment to prevent oil oxidation.
For detailed parameters or model selection support for specific models, it is recommended to contact Marzocchi’s official agent directly or visit their official website to download the product manual to obtain the latest technical data and customized solutions.