The S-Series screw vacuum pumps operate on the principle of internal compression, using synchronized screw rotors for efficient, contact-free operation.
Two parallel screw-shaped rotors—one with a right-hand thread and the other with a left-hand thread—turn in opposite directions inside the compressor housing without friction. Gas is transported into the compression chamber, where it is compressed axially from the suction side to the discharge side.
In variable pitch models, the gas is cooled at each pitch change, optimizing efficiency and reducing heat buildup. Cooling is achieved through a water-cooled outer chamber, with optional cooling gas for specific pump sizes. This design ensures durability, low noise levels, and minimal vibration, making the S-Series pumps ideal for demanding industrial applications.