Operating principle and features:
The series HGL, HG pump is a kind of single-stage and single-cylinder rotary piston vacuum pump. It’s enormously improved series H rotary piston pump and includes four patents; its standard abilities have a great improvement.
Rotary piston vacuum pump is a type of vacuum production equipment appropriate for pumping ordinary gases and condensable gases(whenever a gas ballast used). The pump has to be fitted with suitable accessories if gas is wealthy in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle show in working 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 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, in order that pumping function could possibly be attained.
The series HGL, HG pump could be a backing pump when mixed with an additional higher vacuum pump as well as operate singly. It is widely used in vacuum smelting, vacuum drying, vacuum impregnation and higher vacuum 
simulation testing,and so forth.
ROTARY PISTON VACUUM PUMPS
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