Dry Screw Vacuum Pumps – Elmo Rietschle S Series

Elmo Rietschle’s S-Series dry screw vacuum pumps provide efficient and reliable vacuum solutions for a wide range of industrial applications. These pumps are designed to operate dry and contact free, meaning no lubrication is required within the pumping chamber. This feature prevents contamination of the process and ensures a clean, oil-free vacuum – a critical factor for industries requiring the highest levels of hygiene and process integrity.

Dry, Contact Free Operation

The dry screw design eliminates the need for oil or any other lubricants in the vacuum chamber. Consequently, there is no risk of process contamination or environmental pollution caused by pump operation. This makes the S-Series ideal for food packaging, pharmaceutical production, and other sensitive manufacturing processes. Furthermore, the pumps maintain consistent performance even under heavy operational loads, offering superior reliability and durability.

Wide Performance Range

Elmo Rietschle S-VSI vacuum pumps deliver an ultimate vacuum of 0.08 mbar (abs.) and are capable of operating at any pressure between atmospheric and end vacuum. This wide performance range ensures flexibility for multiple applications across different industries. Whether you need a vacuum for packaging, drying, coating, or vacuum furnaces, the S-Series can meet demanding requirements efficiently.

Rugged and Durable Design

The S-Series pumps feature a robust housing containing two parallel screw rotors. These rotors are synchronized by a timing gear and rotate in opposite directions. Gas is compressed as it moves toward the discharge port, while the gearbox and mechanical seals are oil lubricated to ensure smooth operation. Continuous cooling is achieved through a flow of coolant in the pump housing, which stabilises operating temperatures and improves efficiency.

The low rotational speed reduces noise and vibration, creating a quieter work environment. Moreover, the pumps tolerate high levels of water vapour and occasional liquid ingress, making them highly versatile and durable in industrial environments. Maintenance is straightforward due to the pump’s accessible design, which extends service intervals and reduces overall lifecycle costs.

Advantages at a Glance

Elmo Rietschle dry screw vacuum pumps offer numerous advantages for industrial users:

• Dry running, contact free operation
• High vacuum in a single stage
• Application specific options available
• High water vapour tolerance
• Rapid evacuation times due to high suction capacities
• Low noise operation
• Easy servicing and maintenance
• Low life cycle costs
• Oxygen-compatible version available

These benefits combine to create a vacuum solution that is reliable, efficient, and economical over its operational lifetime.

The versatility of S-Series screw vacuum pumps makes them suitable for a wide array of industries. Key applications include:

• Food Packaging and Processing
  S-Series pumps are widely used in food packaging, particularly in processes requiring clean, oil-free vacuum. Typical applications include tray sealing, modified atmosphere packaging (MAP), degassing, drying, tumbling, cutting, mixing, and cooling. These pumps help maintain product integrity while optimising production efficiency.
• Industrial Applications
  Screw vacuum pumps from Elmo Rietschle are ideal for cleaning, coating, drying, dust extraction, and vacuum metallurgical processes. They can handle high levels of water vapour, enabling continuous operation even in demanding industrial environments.
• Packaging Industry
  Central vacuum systems benefit from the S-Series pumps due to their high suction capacity and low maintenance requirements. They provide reliable vacuum support for automated packaging machines and large-scale processing lines.
• R&D and Laboratories
  Laboratories and research facilities require highly precise and clean vacuum conditions for experiments and production processes. Elmo Rietschle screw vacuum pumps are suitable for various laboratory applications, including cell lamination in solar technology, glass handling, and surface coating processes.
• Surface Technology and Electronics
  The S-Series pumps are well suited for surface treatment, chemical vapour deposition (CVD), physical vapour deposition (PVD), and vacuum metallurgy applications. Their clean, oil-free operation ensures that delicate electronics or coating processes remain uncontaminated.

Technical Features

Elmo Rietschle dry screw vacuum pumps are engineered with performance and flexibility in mind:

• Volume flow: 100 to 600 m³/hr
• Ultimate vacuum: 0.08 mbar (abs.)
• Operation: Dry, contact free
• Cooling: Continuous coolant flow
• Rotors: High precision, low vibration design

These technical features guarantee a high level of efficiency, long service life, and process reliability, all while keeping operational costs low.

Elmo Rietschle has decades of experience in vacuum technology, and the S-Series represents the pinnacle of dry screw vacuum design. By combining high suction capacity, low maintenance requirements, and clean operation, these pumps are an ideal choice for industries that demand the highest standards of performance and hygiene.

The availability of oxygen-compatible versions ensures that critical processes in the food and chemical industries are performed safely and efficiently. Variable speed drive options allow for further energy optimisation and precise control of the vacuum system.

For industrial businesses seeking efficient, low-maintenance, and high-performance vacuum pumps, the Elmo Rietschle S-Series is a proven and trusted solution.

Pneumatics & Sensors Ireland are official distributors in Ireland for all Elmo Rietschle products and components. We have in-depth knowledge of all Elmo Rietschle products and their applications, and can advise on any installation or replacement. To learn more, contact us today.

Downloads

• S Series Catalogue