The principle of operation of the spool vacuum pump is based on the use of the rotary movement of the eccentric and compression of the plunger in the chamber of the rotary pump. They force the medium to move through the pipeline, passing the valve chamber oil purifier along the way. The medium enters through a window in the rear of the plunger. Due to the vacuum generated by the rotational movement of the eccentric, air flows through the inlet chamber. The second camera works in the same way, but works at an angle of 180 degrees to the first camera.
