Working principle and capabilities:
The series HGL, HG pump is a kind of single-stage and single-cylinder rotary piston vacuum pump. It’s greatly enhanced series H rotary piston pump and involves 4 patents; its common abilities have a excellent improvement.
Rotary piston vacuum pump is usually a sort of vacuum production tools ideal for pumping ordinary gases and condensable gases(when a fuel ballast applied). The pump should be fitted with acceptable add-ons if gas is wealthy in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle show in doing work principle graph: A rotary piston with slide valve across ecentric wheel driven by shaft in the housing. Piston pole can slide and swing freely in arch track. The whole pump chamber is divided into chamber A and chamber B by piston. When shaft rotates the volume of chamber A and chamber B are transformed repetitively, so that pumping purpose could possibly be accomplished.
The series HGL, HG pump 
is often a backing pump when combined with a different large vacuum pump too as operate singly. It can be widely used in vacuum smelting, vacuum drying, vacuum impregnation and large vacuum simulation testing,and so on.
