Since 1965, Sully has been designing and manufacturing DS oil-free screw compressors with core technology screw rotors, and has won the 2010 Industrial Product of the Year Award in the U.S.A. We have become the world leader in screw technology and vacuum technology by providing the highest quality and efficiency to our customers around the globe.

1、Screw mainframe is the core component developed by Shouli, which is more mature and efficient after three generations of development:

2、The latest patented screw profile

3、Matched pair manufacturing yin and yang screws with high manufacturing precision

4、Using special bearings to exclude the balancing piston as a faulty component

5、High pressure rotor is 5-7 teeth design, better sealing effect.

6、High pressure rotor is made of stainless steel, suitable for harsh working conditions.

7, FDA standard food grade coating, safe and reliable use

8、Technical labyrinth type gas seal / oil seal, can compress special gases.

9, the newly developed third-generation DS oil-free screw host, the design of the reference to the three-dimensional fluid analysis theory, the screw rotor sealing line for the most optimal thermal balance design, and the shape of the exhaust port optimization, so that the internal leakage is reduced to a minimum.