Operating principle and functions:
The series HGL, HG pump can be a kind of single-stage and single-cylinder rotary piston vacuum pump. It can be significantly enhanced series H rotary piston pump and consists of four patents; its basic abilities possess a fantastic improvement.
Rotary piston vacuum pump is really a sort of vacuum production gear ideal for pumping ordinary gases and condensable gases(whenever a fuel ballast utilised). The pump must be fitted with ideal accessories if gas is rich in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle show in functioning 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 altered repetitively, to ensure that pumping purpose could possibly be achieved.
The series HGL, HG pump can be a backing pump when combined with one more higher vacuum pump also as operate singly. It is broadly used in vacuum smelting, vacuum drying, vacuum impregnation and large vacuum simulation testing,and so forth.
ROTARY PISTON VACUUM PUMPS
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