Operating principle and features:
The series HGL, HG pump is actually a kind of single-stage and single-cylinder rotary piston vacuum pump. It really is significantly improved series H rotary piston pump and contains four patents; its basic abilities have a excellent improvement.
Rotary piston vacuum pump is actually a kind of vacuum production products appropriate for pumping ordinary gases and condensable gases(whenever a gas ballast utilized). The pump need to be fitted with ideal add-ons if gas is rich 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 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 changed repetitively, so that pumping goal could be achieved.
The series HGL, 
HG pump could be a backing pump when combined with an additional high vacuum pump too as operate singly. It is broadly utilized in vacuum smelting, vacuum drying, vacuum impregnation and higher vacuum simulation testing,etc.
