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Marzocchi gear pump ALP3A-D-20-FG parameter description

更新时间：2026-04-18 09:24:42

1. Product Overview

Marzocchi ALP3A-D-20-FG is a high-performance aluminum alloy gear pump belonging to the ALP series (standard pressure series) of Marzocchi, an internationally renowned Italian hydraulic equipment manufacturer. It features high working pressure, high speed, high volumetric efficiency and low noise, suitable for both industrial and mobile hydraulic applications[superscript:6]. The pump body, flange and end cover are made of special pressure-resistant aluminum alloy die-casting, ensuring compact structure and light weight while maintaining excellent mechanical performance[superscript:6].

2. Core Technical Parameters

Parameter Item	Specification	Unit
Model	ALP3A-D-20-FG	-
Displacement	20	cm³/rev
Flow Rate (at 1500 r/min)	29	Litres/min
Maximum Pressure (P1)	230	bar
Maximum Pressure (P2)	250	bar
Maximum Pressure (P3)	270	bar
Maximum Speed	3500	rpm

3. Structural & Installation Parameters

Shaft Specification: SAE B ⅞” (available in parallel key with 450 Nm torque or 13T spline with 600 Nm torque)[superscript:4].
Mounting Type: SAE B 2-bolt mounting[superscript:4].
Spigot Size: 4.0”.
Port Specification: SAE Code 61 split flange; suction port 1”, pressure port ¾”.
Port PCD: 56 x 56 mm (consistent with ALP3A-D-30 to 80 models).

4. Material & Performance Characteristics

Main Material: Special pressure-resistant aluminum alloy (pump body, flange, end cover)[superscript:6].
Performance Features: High volumetric efficiency, low noise, compact structure, light weight-power ratio, and strong adaptability to working conditions.
Applicable Fluid Temperature Range: Standard range is -10 °C to +120 °C; for high-temperature applications, the maximum fluid temperature can reach +150 °C (with corresponding pressure limitation).
Applicable Inlet Pressure: Maximum inlet pressure up to 6 bar (for specific applications).

5. Accessories & Notes

Optional Accessories: Seal kit (Part No. 650236), Viton seal kit (Part No. 650237).
Application Notes: When used with glycol water or low-lubrication media, the speed is recommended not to exceed 1000 rpm and the pressure not to exceed 100 bar; for phosphorus-containing ester media, the same speed and pressure limitations apply.
Series Compatibility: Can be combined with other ALP series models to form double pumps or multiple pumps for complex hydraulic systems.

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