Working principle and options:
The series HGL, HG pump can be a sort 
of single-stage and single-cylinder rotary piston vacuum pump. It’s considerably enhanced series H rotary piston pump and incorporates four patents; its general abilities have a excellent improvement.
Rotary piston vacuum pump is really a sort of vacuum production products suitable for pumping ordinary gases and condensable gases(when a gas ballast employed). The pump needs to be fitted with acceptable add-ons if gasoline is rich in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle display in functioning 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 changed repetitively, so that pumping objective might be achieved.
The series HGL, HG pump is often a backing pump when mixed with another large vacuum pump likewise as operate singly. It is actually widely used in vacuum smelting, vacuum drying, vacuum impregnation and higher vacuum simulation testing,etc.
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