Dry screw vacuum pumps are designed for completely dry compression and do not require lubricant in the compression chamber. This makes them ideal for use in food packaging or thermal treatment systems. The absence of lubricant minimizes maintenance, reducing operational costs while ensuring higher and consistent performance.
Discover products under the Gemux brand or offered in collaboration with top industrial partners by visiting our dedicated website section. Alternatively, configure your pump using the configurator available to all our clients.
Dry screw vacuum pumps have become the standard solution in almost all industrial vacuum processes. Brazing or sintering furnaces, metallurgical systems, and even steel degassing plants benefit from their dust resistance and minimal maintenance requirements. They are often used in food processing, drying, packaging, and even in freeze-drying processes, increasingly favoring oil-free screw pumps to prevent contamination from water or process debris.
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These pumps belong to the family of dry compression gas transfer pumps. They use two screw-shaped rotors to move gas along the screw axis.
Dry screw vacuum pumps operate using two counter-rotating screw rotors, designed to rotate towards each other, trapping gas between the screws. As the screws rotate, this trapped gas volume decreases due to compression and moves towards the exhaust.
A motor drives the two rotors via a gear. The gears and bearings are lubricated but separated from the pumping mechanism by shaft seals or labyrinth seals, ensuring oil-free compression.
The rotors do not have any mechanical contact with each other or the pump housing, resulting in no mechanical wear. Modern pumps, driven by an electronic frequency converter, rotate more slowly at pressure intervals close to atmospheric pressure. Some versions use blow valves to maintain constant rotation speed even at high pressures. Cooling is typically water-based.
Dry screw vacuum pumps can achieve final pressures of 0.01 mbar, with an operating pressure range of 10³ to 10⁻² mbar. Various sizes are available with pumping speeds ranging from 60 to 1200 m³/h.
These pumps are widely used in various industries including:
Discover products under the Gemux brand or offered in collaboration with leading industrial partners by visiting our website. You can also configure your pump using the available configurator for our clients.
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Through GEMUX, we offer technical solutions (machines, skids, and plant services) related to the industrial world.
Discover products under the Gemux brand or offered in collaboration with top industrial partners by visiting our dedicated website section. Alternatively, configure your pump using the configurator available to all our clients.
