Marzocchi Gear Pump ALPC-GHPC Series
Marzocchi Gear Pump ALPC-GHPC Series – Models and Parameters
Marzocchi ALPC-GHPC series consists of short-type multi-stage external gear pumps, including ALPC series and GHPC series. As derived models of the ALP and GHP series, they are designed with shortened axial length to fit narrow installation spaces such as mobile machinery and compact industrial hydraulic systems. The ALPC series features die-cast construction, while the GHPC series adopts a heavy-duty cast iron design, both available in two-stage and three-stage configurations, which can be extended to more than three stages upon request. With displacement ranging from 1.4 cc/rev to 87 cc/rev and max continuous working pressure up to 250 bar, they combine compact structure and reliable performance. The following are the detailed models and parameters of each series.
1. ALPC Series
The ALPC series is a short-type multi-stage gear pump series, developed based on the ALP series with die-cast flanges and covers. It is characterized by reduced axial length, compact size, and light weight, suitable for applications with limited installation space. The series mainly includes two-stage and three-stage pumps, which can be customized into more stages according to actual operation conditions and verification requirements.
1.1 Models and Detailed Parameters
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Model Series
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Displacement Range (cc/rev)
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Flow at 1500 rev/min (L/min)
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Max Continuous Pressure (bar)
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Max Peak Pressure (bar)
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Max Speed (rpm)
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ALPC 1, ALPC 1A
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1.4 – 13.8
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2.1 – 20.7
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250
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270
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4000
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ALPC 2, ALPC 2A
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4.5 – 35.2
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6.8 – 52.8
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250
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290
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4000
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ALPC 3, ALPC 3A
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20 – 87
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30 – 130.5
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230
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270
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3500
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Key Notes: Typical models of ALPC series include ALPC1-D-2-FG, ALPC1A-D-3-FG, ALPC2-D-6-FG, ALPC2A-D-9-FG, etc. The ALPC series adopts die-cast aluminum alloy housing with die-cast flanges and covers, featuring compact structure and light weight. It is a short-type multi-stage pump with a special common inlet version available, where one inlet supplies two or three components to simplify the hydraulic system structure. The max continuous backpressure is 6 bar, and the max drain line pressure is 6 bar. Proper filtering of the hydraulic system is required to ensure product performance.
2. GHPC Series
The GHPC series is a heavy-duty short-type multi-stage gear pump series, developed based on the GHP series with cast iron flanges and covers. It is characterized by high load-bearing capacity, excellent wear resistance, and shortened axial length, widely used in heavy-duty industrial and mobile hydraulic systems requiring compact installation and high power output.
2.1 Models and Detailed Parameters
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Model Series
|
Displacement Range (cc/rev)
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Flow at 1500 rev/min (L/min)
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Max Continuous Pressure (bar)
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Max Peak Pressure (bar)
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Max Speed (rpm)
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GHPC 1, GHPC 1A
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1.4 – 13.8
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2.1 – 20.7
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250
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270
|
4000
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GHPC 2, GHPC 2A
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4.5 – 50
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6.8 – 75
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250
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290
|
4000
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GHPC 3, GHPC 3A
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20 – 87
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30 – 130.5
|
250
|
270
|
3500
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Key Notes: Typical models of GHPC series include GHPC1-D-2-FG, GHPC1A-D-3-FG, GHPC2-D-6-FG, GHPC2A-D-13-FG, GHPC3A-D-40, etc. The GHPC series adopts heavy-duty cast iron construction with cast iron flanges and covers, featuring strong load-bearing capacity and good corrosion resistance. It is a short-type multi-stage pump that can be extended to more than three stages according to application requirements, with a common inlet design available to simplify the system structure. Equipped with reinforced bearings, it ensures stable operation under heavy load. The max continuous backpressure is 6 bar, and the max drain line pressure is 6 bar.
General Specifications of ALPC-GHPC Series
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Design: External gear pump, simple structure, low maintenance cost and long service life. Both series are short-type multi-stage designs with shortened axial length; ALPC series is die-cast, and GHPC series is heavy-duty cast iron, available in two-stage, three-stage or more configurations upon request.
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Hydraulic Fluid: Suitable for standard hydraulic fluids; proper filtering of the hydraulic system is required to ensure product performance and service life. The recommended filter fineness is ≤10 μm. For special applications, optional configurations for high-temperature, low-temperature or special media are available.
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Rotation Direction: Available in left (ALPC/GHPC…L) and right (ALPC/GHPC…D) configurations; the rotation direction is reversible, with stable performance during forward and reverse rotation.
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Installation: Follow the installation guidelines provided by Marzocchi to ensure proper connection of supply and delivery lines, avoid fluid turbulence, and ensure the pump is firmly fixed. The installation flange and shaft connection should be aligned to prevent eccentricity, which is especially important for short-type multi-stage pumps.
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Material: ALPC series – die-cast aluminum alloy housing, die-cast flanges and covers; GHPC series – cast iron flanges and covers, special steel gears; both series adopt high-strength materials to ensure durability and corrosion resistance.
