Operating principle and options:
The series HGL, HG pump is a sort of single-stage and single-cylinder rotary piston vacuum pump. It is significantly improved series H rotary piston pump and contains four patents; its standard capabilities possess a wonderful improvement.
Rotary piston vacuum pump can be a type of vacuum production gear ideal for pumping ordinary gases and condensable gases(whenever a fuel ballast used). The pump must 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 demonstrate 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 modified repetitively, in order that pumping objective may be achieved.
The series HGL, HG pump can be a backing pump when combined with 
a further high vacuum pump as well as operate singly. It really is extensively utilized in vacuum smelting, vacuum drying, vacuum impregnation and higher vacuum simulation testing,and so forth.
