HG Series Gear Pump High Pressure Single Gear Pump HG0-5
Features
It uses axial and radial pressure compensation design—so volumetric
efficiency stays high even at low speeds or low viscosity.
Ultra-Low Noise & Stable Output
Made of high-strength cast iron with exclusive internal noise
reduction: noise levels stay very low.
Minimal flow and pressure pulsation: stable output even at low
speeds.
High-Pressure & Wide Speed Range
Max working pressure reaches 35MPa.
Wide speed range: up to 3000r/min.
Versatile & Durable
Can be combined into a double pump.
Resistant to oil contamination, long service life.
Widely used in hydraulic systems (e.g., plastic machinery,
shoe-making machines, die-casting equipment, forklifts); ideal for
servo inverter-driven energy-saving systems.
Structure
The HG series hydraulic pump is a backlash compensation internal
gear pump with a fixed displacement.
lts basic composition is: front cover (1), pump body (2), rear
cover (3), gear shaft (4), ring gear (5), sliding bearing (6),
front and rear side plates (7) and positioning Rod (8), and the
radial compensation function composed of the crescent sub-plate
(9), the crescent main plate (10) and the plastic rod (11).
Specifications
| Serial Number | Specification | Displacement
(mL/r) | Work pressure
(Mpa) | Range of rotation
(r/min) | Weight
(KG) |
| Rated | Highest | Highest | Lowest |
| HG0 | 5 | 5.2 | 31.5 | 35 | 3000 | 600 | 4.4 |
| 8 | 8.2 | 31.5 | 35 | 3000 | 600 | 4.6 |
| 10 | 10.2 | 31.5 | 35 | 3000 | 600 | 4.8 |
| 13 | 13.3 | 31.5 | 35 | 3000 | 600 | 4.9 |
| 16 | 16 | 31.5 | 35 | 3000 | 600 | 5.2 |
| 20 | 20 | 25 | 30 | 3000 | 600 | 5.6 |
| HG1 | 25 | 25.3 | 31.5 | 35 | 3000 | 200 | 14.5 |
| 32 | 32.7 | 31.5 | 35 | 3000 | 200 | 15 |
| 40 | 40.1 | 31.5 | 35 | 3000 | 200 | 16 |
| 50 | 50.7 | 31.5 | 35 | 3000 | 200 | 17 |
| 63 | 63.7 | 25 | 30 | 3000 | 200 | 18.5 |
| HG2 | 80 | 81.4 | 31.5 | 35 | 3000 | 200 | 43.5 |
| 100 | 100.2 | 31.5 | 35 | 3000 | 200 | 45.5 |
| 125 | 125.3 | 31.5 | 35 | 3000 | 200 | 48 |
| 145 | 145.2 | 25 | 35 | 3000 | 200 | 50 |
| 160 | 162.8 | 21 | 35 | 3000 | 200 | 52 |
Model Number Designation
| HG | 1 | -40 | -01 | R | -V | P | C |
| Pump series | Serial number | Specification | Design number | Rotation direction (viewed from the shaft end) | Sealed form | Shaft extension form | Flange installation form |
| HG: Internal gear pump | 0: Displacement 5~20
1: Displacement 25~63
2: Displacement 80~160 | Displacement (mL/r):
5
8
10
13
16
20
25
32
40
50
63
80
100
125
145
160 | 01 | R: Clockwise
L: Counterclockwise | V: Fluororubber | P: Flat key shaft
S: Spline shaft | C: SAE 2 hole |
Note: Counter clockwise rotation limited to HG series single pump
Precautions for Use
1.Working medium
Petroleum-based mineral oil with a viscosity range of 10-300mm/s
can be used. ISO VG46 anti-wear hydraulic oil is recommended.
2.Working temperature
The working temperature range is -10℃-100℃. In order to ensure
long-term reliable life, the best working temperature range is
20℃-80℃.
3.Cleanliness control
The cleanliness level of the control system oil is required to be
no more than 9 (NAS 1638) or 17/14 (ISO 4066).
4. Pump installation
When connecting the shaft and the motor, use a flexible coupling as
much as possible to avoid bending moment or axial thrust. The
maximum allowable coaxiality error between the shaft and the motor
shaft is less than0.15mm.
5. Inlet pressure and piping
Allow the absolute pressure ofthe suction port to be 0.2-2Bar. The
reasonable piping diameter should not be smaller than the oil
suction port of the pump to ensure an average oil suction speed of
0.6-1.2m/s.
6. Import and export connection
Try to avoid hard connection of steel pipes in and out of the oil
pipes. Rubber hoses are recommended to avoid additional noise
caused by additional loads.
7.Exhaust
Before the first operation, the pump should be filled with oil or
an exhaust valve should be added to remove the air in the pump and
the system pipeline. If there is air residue in the pump or
pipelinelt will cause the vibration and noise of the pump, and
indirectly affect the service life of the pump.
8. Maintenance
In order to improve the service life of the pump, the system should
be regularly checked for abnormal vibration, noise, oil
temperature, whether there is bubble formation in the oil tank, and
whether there is leakage and other problems, and timely
maintenance.
