Rotary piston vacuum pumps are suitable for pumping air and other general gases. When equipped with a gas ballast valve, they can also handle small amounts of condensable vapors such as water vapor.If the pumped gas contains excessive oxygen, is explosive, corrosive to ferrous metals, or chemically reactive with vacuum pump oil, the pump must be equipped with appropriate auxiliary devices.

HGL and HG series pumps can operate independently, or serve as a backing pump for high-vacuum pumps such as diffusion pumps and Roots pumps.They are widely used in vacuum coating, vacuum heat treatment, vacuum impregnation, vacuum sintering, vacuum metallurgy, vacuum drying, molecular distillation, as well as simulation tests in aviation and aerospace.

Features of HG Series Pumps

- High ultimate vacuum of 0.3Pa.

- Possesses four national patents.

- Optimized shaft sealing structure for zero oil leakage.

- Low vibration, low noise and stable running performance.

1、Pump Housing	4、Piston
2、Eccentric Wheel	5、Discharge Valve
3、Shaft	6、Piston Cuide