Screw Compressors

Screw Compressors

The Vilter single screw compressor is a rotary, positive displacement compressor which incorporates a main screw and two gaterotors. Compression of the gas is accomplished by the engagement of the two gaterotors with the helical grooves in the main screw. The drive shaft imparts rotary motion to the main screw which in turn drives the intermeshed gaterotors.

The compressor is comprised of three fundamental components that rotate and complete the work of the compression process. This typically includes a cylindrical main screw with six helical grooves and two planar gaterotors, each with 11 teeth. The rotational axes of the gaterotors are parallel to each other and mutually perpendicular to the axis of the main screw.

To learn more about the single screw compressor view the Inside Story video.


VSS – Single Screw Compressor with the 5/15 warranty

VSS Single Screw UnitVilter’s VSS line of single screw compressors delivers higher performance than twin screw compressors and have fewer moving parts than reciprocating compressors. The key to Vilter’s single screw compressors reliability is its balanced design. The inherent design advantage allows Vilter to offer the 5/15, a five-year warranty on internal components and a fifteen-year warranty on bearings, the industry’s longest. Besides ultra-low bearing wear, the balanced design decreases vibrations and sound levels. The addition of Vilter’s exclusive Parallex™ slide system allows the compressor to run at optimum efficiency.


VSM – Mini Screw Compressor with the 5/15 warranty

2011 VSM unit

The Vilter Mini Screw is the latest in Vilter’s long, respected line of compressors for industrial cooling applications. The VSM, featuring Vilter’s signature single screw design, has one main rotor and either one or two gaterotors, depending on the model. The VSM is quieter than twin screws, especially the gear driven models. Its compact design has no external tubing on the compressor, no gear box and an optional oil pump (based on applications), making the VSM a very cost-efficient model. It features the new Vission™ micro-controller and our exceptional 5/15 warranty.


VRS – Rotary Screw Compressor Units

Vilter Rotary Screw compressor units (VRS) offer a multitude of industrial performance features evolved over a century of refrigeration design experience. It is available in a number of sizes and can operate on any of the commonly used industrial refrigerants.



VSG-Single Screw Compressor

Vilter’s experience and unique integrated technology delivers unprecedented efficiency, productivity and reliability for compression applications within the Hydrocarbon Processing industry.

Vilter’s VSG single screw compressors deliver longer life, higher reliability and better energy efficiency than twin screw compressors and have fewer moving parts than reciprocating compressors.

The key to the single screw compressor’s reliability is in its balanced design.  At the core of the positive displacement rotary compressor is a single main rotor intermeshed with two opposing gaterotors.  The balanced design results in ultra-low bearing loads with significantly decreased vibration and sound levels.

Learn more about the markets served in Hydrocarbon Processing