Working principle and capabilities:
The series HGL, HG pump is a sort of single-stage and single-cylinder rotary piston vacuum pump. It can be enormously enhanced series H rotary piston pump and contains 4 patents; its common capabilities possess a great improvement.
Rotary piston vacuum pump is really a type of vacuum production products suitable for pumping ordinary gases and condensable gases(whenever a gas ballast utilised). The pump need to be fitted with 
acceptable accessories if fuel is rich in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle demonstrate in working 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 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 altered repetitively, in order that pumping function could be achieved.
The series HGL, HG pump may be a backing pump when mixed with one more high vacuum pump also as operate singly. It is actually broadly used in vacuum smelting, vacuum drying, vacuum impregnation and large vacuum simulation testing,etc.
ROTARY PISTON VACUUM PUMPS
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