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Double Gear Pump

HGP Series External Gear Pumps
(Double Pump/Tandem Pump)

The double high-pressure gear pump utilizes a dual-pump integrated design. It features a high-grade aluminum alloy body, equipped with oilless bearings and Viton oil seals, offering resistance to high temperatures, high speeds, high pressures, and high torque, making it suitable for extreme working conditions.

  • Ultra-high efficiency: Total efficiency of over 95%, significantly reducing energy consumption and optimizing system operating costs.
  • Compact integration: Can directly integrate with hydraulic motors, saving space, simplifying system design, and facilitating installation and maintenance.
  • Dual-pump collaborative operation: Integrates two independent pump bodies, capable of simultaneously providing stable flow to multiple hydraulic circuits, optimizing system efficiency.
  • High-pressure output: Supports pressures of up to 250 bar or higher, meeting demanding power requirements.
  • Precise flow distribution: Ensures uniform, continuous fluid delivery, adapting to the precise control needs of multi-circuit hydraulic systems.
  • Flexible adaptability: Supports various media, including high-viscosity oils, lubricants, and chemical fluids.
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  • HGP-11A Double Gear Pumps
  • HGP-22A Double Gear Pumps
  • HGP-33A Double Gear Pumps
HGP-11A Double Gear Pumps
  • HGP-11A Double Gear Pumps
  • HGP-11A Double Gear Pumps
  • HGP-11A Double Gear Pumps
HGP-11A: Technical Specifications
Model Displacement
(cc/rev)
Operating pressure (bar) Rotation speed (rpm) Weight (kg)
Rated pressure Peak pressure Rated Min. Max.
HGP-11A-F1 1+1 210 250 1800 1000 4500 1
HGP-11A-F2 2+2 210 250 1800 600 4500 1.05
HGP-11A-F3 3+3 210 250 1800 600 4500 1.15
HGP-11A-F4 4+4 210 250 1800 600 4500 1.18
HGP-11A-F5 5+5 210 250 1800 600 3200 1.2
HGP-11A-F6 6+6 210 250 1800 600 3200 1.3
HGP-11A-F8 8+8 175 210 1800 600 3200 1.4
  • HGP-11A Double Gear Pumps
  • HGP-11A Double Gear Pumps
Model Codes
Model name HGP-11A
Mounting type L: foot mounting
F: flange mounting
Rotation direction R: clockwise
L: counter-clockwise
Drive shaft type X: parallel key shaft
Y: spline shaft
Z: taper shaft
Flange type SAE 2-bolt
HGP-22A Double Gear Pumps
HGP-22A: Technical Specifications
Model Displacement
(cc/rev)
Operating pressure (bar) Rotation speed (rpm)
Rated pressure Peak pressure Rated Min. Max.
HGP-22A-F2 2+2 210 250 1800 900 5000
HGP-22A-F3 3+3 210 250 1800 850 5000
HGP-22A-F4 4+4 210 250 1800 800 4500
HGP-22A-F5 5+5 210 250 1800 700 3500
HGP-22A-F6 6+6 210 250 1800 700 3500
HGP-22A-F8 8+8 210 250 1800 600 3000
HGP-22A-F9 9+9 210 250 1800 550 2500
HGP-22A-F11 11+11 210 250 1800 500 2000
HGP-22A-F12 12+12 175 210 1800 500 2000
  • HGP-22A Double Gear Pumps
  • HGP-22A Double Gear Pumps
Model Codes
Model name HGP-22A
Mounting type L: foot mounting
F: flange mounting
Rotation direction R: clockwise
L: counter-clockwise
Drive shaft type X: parallel key shaft
Y: spline shaft
Flange type 4BJ: JIS 4-bolt
  • HGP-33A Double Gear Pumps
  • HGP-33A Double Gear Pumps
  • HGP-33A Double Gear Pumps
HGP-33A: Technical Specifications
Model A1/A2 B1/B2
HGP-33A-*4+4* 45.8 93
HGP-33A-*6+6* 47.3 96
HGP-33A-*8+8* 48.8 99
HGP-33A-*11+11* 51.3 104
HGP-33A-*13+13* 53.3 107
HGP-33A-*17+17* 56.3 114
HGP-33A-*19+19* 58.3 118
HGP-33A-*23+23* 61.8 125
HGP-33A-*25+25* 63.3 128
HGP-33A-*28+28* 65.3 132
HGP-33A-*30+30* 67.3 136
Model Codes
Model name HGP-33A
Mounting type L: foot mounting
F: flange mounting
Rotation direction R: clockwise
L: counter-clockwise
Drive shaft type X: parallel key shaft
Y: spline shaft
Z: taper shaft
Flange type 2B: SAE 2-bolt
4BD: DIN 4-bolt
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Email: noay8hydraulic@gmail.com
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When used with hydraulic motors, electric motors, and similar equipment, which type of gear pump is recommended?

When used with hydraulic motors, electric motors, and similar equipment, we recommend using flange-type gear pumps with a parallel key shaft for greater installation flexibility.

In multi-circuit hydraulic systems, how does the double high-pressure gear pump achieve stable oil supply?

The double high-pressure gear pump utilizes two independent pump chamber designs, capable of providing constant flow to two separate hydraulic circuits. This is particularly suitable for high-load conditions and extreme situations, ensuring smooth operation of the hydraulic system.

Which type of gear pump can be recommended for hydraulic systems with limited space?

For hydraulic systems with limited space, a double pump can be chosen. It integrates two gear pumps into a single unit, occupying less space while operating collaboratively for higher efficiency.

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