Operating principle and features:
The series HGL, HG pump is often a kind of single-stage and single-cylinder rotary piston vacuum pump. It is actually considerably improved series H rotary piston pump and consists of 4 patents; its standard abilities have a terrific improvement.
Rotary piston 
vacuum pump is actually a kind of vacuum manufacturing tools ideal for pumping ordinary gases and condensable gases(whenever a fuel ballast utilized). The pump needs to be fitted with ideal equipment if gas is rich in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle present in doing work principle graph: A rotary piston with slide valve across ecentric wheel driven by shaft inside 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 be accomplished.
The series HGL, HG pump could be a backing pump when mixed with a further large vacuum pump also as operate singly. It truly is broadly used in vacuum smelting, vacuum drying, vacuum impregnation and large vacuum simulation testing,and so on.
