Dry Screw Vacuum Pumps

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Find the Right Screw Solution for Your Needs – the S-Series:

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Dry Screw Vacuum Pump VSI

VSI by Elmo Rietschle: Oil-free screw vacuum pump with up to 360 m³/hr flow, ideal for precise industrial vacuum applications.

Dry Running Screw Vacuum Pump - VSB120-200 | 320-430 | 800

VSB120-800 | Dry running Screw Vacuum Pumps. Oil Free. Low maintenance costs.

Dry Screw Vacuum Pumps for Industrial Applications

Delivering superior performance, our dry screw vacuum pumps—also known as screw compressors, rotary screw vacuum systems, and oil-free screw vacuum pumps—are designed for clean, efficient, and durable operation. With advanced non-contact screw vacuum technology, these pumps provide reliable, contamination-free vacuum generation for a wide range of industries, including food packaging, chemical processing, and electronics manufacturing.

Built with energy-efficiency in mind, our pumps handle high vapor loads, reduce noise, and offer long-term durability. The screw vacuum design ensures seamless operation under demanding conditions, making these pumps the go-to choice for varying applications.

Key Features of Dry Screw Vacuum Pumps

Our heavy-duty, medium-duty, and light-duty screw vacuum systems are expertly engineered to deliver precision and performance across a variety of industrial applications. Features include:

Dry running, oil-free operation: No lubrication required in the pumping chamber for clean, contamination-free processes.
High vacuum levels: Achieve high vacuum in a single stage for faster evacuation.
Robust vapor tolerance: Handle large volumes of air and water vapor with ease.
Energy efficiency: Optimized motor power and variable pitch models enhance performance while minimizing energy consumption.
Low noise and vibration: Designed for quieter operations in industrial environments.
Durable construction: Built for extended lifespans and minimal maintenance requirements.
Flexible configurations: Oxygen-compatible versions available for specialized applications

Types of Dry Running Rotary Screw Vacuum Pumps

VSI Twister

Capacities from 71 to 212 cfm, maximum end vacuum 29.917 inHg (0.075 Torr). Continuous variable pitch screws ensure the highest efficiency of operation and energy consumption. Progressive graduation of the screw pitch and maximum sealing thanks to labyrinth, shaft and piston ring seals.

Sealing gas is optional; benefits include low noise, low operating temperatures and can be easily serviced. Designed for industrial applications devoid of aggressive gasses. General industrial applications such as packaging, drying and coating or vacuum furnaces are best served by our VSI range of pumps.

VSB

VSB Chemical Duty – Capabilities on this pump range from 70 – 440 CFM, getting down to an ultimate vacuum of .020 Torr. The standard pump includes top of the line Kalrez O-rings. Heavy duty Niflon coating comes standard on all vacuum surfaces, lengthening the lifespan of the pump when dealing with chemically abrasive products and aggressive pumping speeds.

S-Series Dry Screw Vacuum Performance & Technical Specifications:

In the pump housing, two parallel screw rotors, both timing gear synchronized, turn in opposite directions. Gearbox and mechanical seals are oil lubricated. Cooling is achieved through the continuous flow of coolant through the pump housing.
The S-Series are screw pumps designed with high vapor and liquid tolerance, are easy to service and have a long service life and the low rotational speed ensures low noise and low vibration.

Our VSI screw vacuum pump systems achieve an ultimate vacuum of 29.917 inHgV (0.075 Torr) and can operate at any pressure between maximum vacuum and atmospheric pressure. Capacities of 70 and 212 cfm are available.

S-VSI Series: Offers oil-free operation with capacities up to 12713 ft3/h and low operating temperatures for optimal cycle times
VSB Series:Capabilities on this pump range from 70 – 440 CFM

Innovating Industrial Efficiency

Efficient and durable, our dry screw vacuum pumps meet the needs of modern industrial environments with clean, oil-free vacuum technology. Ideal applications include:

Applications

Food Packaging and Processing
Industrial Vacuum Applications
General Applications
Environmental and Specialty Applications
Automotive and Transportation
Environmental Technology
Chemical Processing
Electronics and Semiconductors

How Does a Screw Vacuum Pump Work?

At the core of our twin screw vacuum pumps is the principle of positive displacement and internal compression. Using synchronized rotary screw technology, the pumps operate without friction, ensuring long-lasting performance.

Compression Process: Two parallel screw rotors—one with a right-hand thread and the other with a left-hand thread—rotate in opposite directions, transporting gas into the compression chamber.
Variable Pitch Models: Gas is cooled at each pitch change, reducing heat buildup and improving overall efficiency.
Water-Cooled Design: Cooling is achieved through a water-cooled outer chamber, with optional cooling gas available for specialized applications.

This non-contact screw vacuum design ensures minimal wear, low maintenance costs, and reliable operation, making it ideal for US industries seeking high-performance vacuum solutions.