Working principle and options:
The series HGL, HG pump is actually a sort of single-stage and single-cylinder rotary piston vacuum pump. It is actually tremendously enhanced series H rotary piston pump and consists of 4 patents; its general capabilities have a great improvement.
Rotary piston vacuum pump is a kind of vacuum production tools appropriate for pumping ordinary gases and condensable gases(whenever a fuel ballast applied). The pump needs to be fitted with suitable accessories if gasoline is wealthy in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle demonstrate in operating 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 transformed repetitively, to ensure that pumping goal can be achieved.
The series HGL, HG pump is usually a backing pump when mixed with yet another higher vacuum pump also as operate singly. It really is widely used in vacuum smelting, vacuum drying, vacuum impregnation and high vacuum simulation testing,and so forth.
