1. It can be in service under the condition of no working medium(no oil) and will not produce any pollution. Moreover, there isfiltering material in the air exchange bin of the body to guaranteeclean air.

2. New technologies and materials are used in production. It iseasy to move and can work smoothly, which can guarantee the idealvacuum and high rate of flow of air stream.

3. It adopts the operation containing no friction, producing nocalories and having no friction exhausts. The diaphragm is made ofpolyfluoroprene, which resists the corrosion and has long operatinglife.

4. The self-cooling air draft system is designed in the body.This system can keep the machine continuously running for 24hours.

5. The design can be regulated by pressure to meet therequirements of vacuum or controllable steady air stream withincertain range.

6. The axletrees are classical, which are imported abroad. Theyhave the features of steady running, low noise and high operatingefficiency.