1. No need for any working medium (no oil), no pollution, and at the same time, the air break exchange chamber of the machine is built with filter materials to ensure the purity of the air. 2. New technologies and materials are adopted in the production process. It is easy to move and works smoothly, thus ensuring vacuum degree and high air flow rate. When the temperature reaches 130C, it will automatically cut off the power to protect the motor from damage during long-term operation. 3. Adopt frictionless membrane body movement, no heat generation, no friction loss. The diaphragm is made of imported rubber, which is corrosion-resistant and has a long service life. 4. The body is designed with an automatic cooling and exhaust system, which can ensure 24-hour continuous operation. 5. The pressure adjustable design is adopted, which can meet the vacuum degree and gas flow rate within a certain range.