Operating principle and attributes:
The series HGL, HG pump is usually 
a type of single-stage and single-cylinder rotary piston vacuum pump. It’s greatly improved series H rotary piston pump and contains four patents; its general abilities possess a great improvement.
Rotary piston vacuum pump can be a type of vacuum production products suitable for pumping ordinary gases and condensable gases(whenever a fuel ballast employed). The pump should be fitted with appropriate accessories if gasoline is rich in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle present in working principle graph: A rotary piston with slide valve across ecentric wheel driven by shaft inside the housing. Piston pole can slide and swing freely in arch track. The entire 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, to ensure pumping function might be accomplished.
The series HGL, HG pump is often a backing pump when mixed with another substantial vacuum pump too as operate singly. It can be widely utilized in vacuum smelting, vacuum drying, vacuum impregnation and substantial vacuum simulation testing,and so forth.
