Working principle and attributes:
The series HGL, HG pump is actually a form of single-stage and single-cylinder rotary piston vacuum pump. 
It really is drastically improved series H rotary piston pump and incorporates 4 patents; its general abilities have a terrific improvement.
Rotary piston vacuum pump is usually a sort of vacuum production tools suitable for pumping ordinary gases and condensable gases(whenever a gas ballast utilised). The pump has to be fitted with ideal accessories if gasoline is rich in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle show in operating principle graph: A rotary piston with slide valve across ecentric wheel driven by shaft within 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 transformed repetitively, to ensure pumping function can be accomplished.
The series HGL, HG pump might be a backing pump when mixed with an additional large vacuum pump too as operate singly. It can be broadly utilized in vacuum smelting, vacuum drying, vacuum impregnation and substantial vacuum simulation testing,etc.
