Working principle of roots blower:

1. Inspiratory initiation
2. The inspiratory end volume remains unchanged
3. The gas is compressed externally by the back pressure
4. venting

Working principle of screw blower:

1. Inspiratory initiation
2. Suction ends, compression begins
3. During compression
4. Compression ends and exhaust begins

Compared with traditional blowers, HDLGB series oil-free screw blowers have the following performance advantages：

1.Low energy consumption
Oil-free screw blower based on the principle of thermal compression, the total efficiency of more than 75%, than Roots blower energy saving more than 20%-35%. Higher exhaust pressure, lower pressure pulse.

2. Low noise
The pneumatic noise of the screw rotor is very small, the smooth output eliminates the sudden release of the internal air, the wavy inlet and the air outlet reduce the airflow fluctuation to a lower level, and the blower noise is less than that of the traditional roots blower.

3. Intelligence
Intelligent PLC control, remote control. A variety of communication methods, convenient operation management.

4. Low cost
The optimized structural design enables us to ensure the durability and usability of the product with less consumption, while the unit runs smoothly and the load is small, without special infrastructure. Achieve greater customer benefits.

Widely used in paper, petroleum, metallurgy, chemical industry, electric power, food, semi-conductor, medicine and other fields.