Working principle and capabilities:
The series HGL, HG pump is usually a type of single-stage and single-cylinder rotary piston vacuum pump. It’s enormously enhanced series H rotary piston pump and contains 4 patents; its standard capabilities possess a wonderful improvement.
Rotary piston vacuum pump is actually a kind of vacuum production tools suitable for pumping ordinary gases and condensable gases(when a gasoline ballast made use of). The pump has to be fitted with suitable add-ons 
if gasoline is wealthy in oxygen, explosive, corrosive to ferrous metal, chemical reactive with vacuum pump oil.
Operation principle display 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 transformed repetitively, in order that pumping objective may very well be accomplished.
The series HGL, HG pump could be a backing pump when mixed with a further large vacuum pump too as operate singly. It’s widely utilized in vacuum smelting, vacuum drying, vacuum impregnation and substantial vacuum simulation testing,etc.