HG Series Double Pump Internal Gear Pump HG10 HG11 HG21 HG22

Features

The double pump is composed of two single pumps assembled in series, with a common oil inlet and two oil outlets that can be fed to two independent circuits. According to the series combination of the two pumps, a variety of displacements can be obtained.

Model Number Designation

Precautions for use

1.Working medium

Petroleum-based mineral oil with a viscosity range of 10-300mm2/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 is20℃-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 than 0.15mm.

5. Inlet pressure and piping

Allow the absolute pressure of the 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.