MULTIPLE MODULAR GEAR PUMPS ALP-GHP SERIES
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Gear pumps in a modular configuration that, when assembled together, form a multiple pump.
Depending on the requirements, pumps from both series can be assembled.
Available in front, intermediate, and rear configurations, with a wide range of displacements depending on the selected series.
ALP-GHP Gear Pumps by Marzocchi represent the evolution of modular hydraulic technology. Designed for the assembly of high-performance multiple pumps, they are available in various configurations: front, intermediate, and rear, and can be freely combined across series and groups (ALP1-4, GHP1-3), offering maximum versatility for complex system configurations.
The modular structure allows precise selection of the desired displacement – from 1.4 to 200 cm³/rev – thanks to the wide available range, and customization of each element to meet specific requirements of pressure, flow rate, speed, and system compatibility.
The pump bodies of the ALP series are made from high-strength extruded aluminum alloy, while the GHP versions feature spheroidal cast iron flanges and covers to ensure maximum stability even under high mechanical and thermal stress. The gears are made of specially hardened and case-hardened steel, then ground and superfinished to ensure optimal quiet operation and low pulsation levels.
Die-cast aluminum bushings feature isolated axial and radial compensation zones with preformed seals and anti-extrusion rings, ensuring high volumetric efficiency even at high pressures.
ALP-GHP pumps offer maximum peak pressures up to 310 bar (GHP3), with intermediate and continuous levels defined for each group. Maximum speeds range from 6000 rpm (GHP1) to 1800–2500 rpm for larger displacement models. Flow rates range from just a few liters per minute to over 280 l/min at 1500 rpm, with volumetric efficiency of 95%.
Minimum speed is also specified for each size and group, ensuring stable operation even in partial load or frequent start/stop conditions.
Each modular element is available with numerous flange, shaft, and port variations:
European, SAE, BK flanges
Cylindrical, conical, and splined shafts
Threaded ports M6, M8, M10, G1/4 (depending on group)
Standard, VITON®, reinforced (TR) seals
Available configurations include:
Standard unidirectional versions (D/S)
Modular intermediate versions (I)
Rear versions (P)
Options “TR” for reinforced sealing, “AS” for separate suction, “AC” for common suction
Special versions are also available for extreme temperature applications (“H”, “V”, “VV”, “ST”) and for high suction pressures (“TR”, up to 6 bar absolute).
ALP-GHP pumps are used in:
Earth-moving machines
High-pressure industrial systems
Mobile and agricultural vehicles
Marine applications
Press systems, lifting, and recycling
| Feature | Description |
|---|---|
| Available displacements | From 1.4 to 200 cm³/rev (groups ALP1-4 / GHP1-3) |
| Maximum pressure | Up to 310 bar (GHP3), 290 bar (ALP) |
| Maximum speed | Up to 6000 rpm (small groups), from 2000 rpm upwards (large groups) |
| Materials | Aluminum body (ALP), cast iron flanges/covers (GHP), hardened and ground steel gears |
| Configurations | Unidirectional (D/S), intermediate and rear modules, TR, AS, AC versions |
| Seals | Standard, VITON®, reinforced (TR), HNBR on request |
| Applications | Mobile and industrial systems, presses, recycling, agriculture, lifting |
Head Office:
Strada Statale 7 Via Appia, 68
82011 Airola (BN)
Legal Headquarters:
Via Tufara Scautieri, 6
83018 San Martino Valle Caudina (AV)
Tel.: +39 0823 950994
Fax: +39 0823 1607499
E-mail: info@lubeteam.it