19 April, 2018

EuroVacuum claw pumps for efficiency and durability

10 June, 2016

Offering a low maintenance solution for the creation of continuous vacuum or pressure, claw pumps from EuroVacuum Products are claimed to present an ideal selection for a wide range of industrial applications. Equipped with variable speed drives, combined with innate design benefits for reliable operation, claw pumps adhere to the stringencies of even corrosive environments.


Claw pumps compress gas within the pump chamber via two irregularly shaped rotors or ‘claws’ that counter rotate inside the casing. To create internal compression, the pump outlet is sealed temporarily until adequate pressure is attained, with the contained gases then expelled via the pump outlet. An anti-suck back valve in the inlet flange prevents gas backflow into the chamber. The rotors themselves are synchronised by gears, which are generally oil lubricated to ensure maximum service life. Pumping and gear chambers are separated using durable labyrinth seals. Air cooled, dry running and contactless in operation, claw pumps when treated correctly can run for years without requiring rebuild.

Contactless operation

Reliability and durability are guaranteed through the design of the pump. Contactless operation ensures a lack of wear parts within the chamber, increasing the duration of maintenance intervals. With no oil lubricating the rotors within the casing, servicing is kept to a minimum, with the risk of lubricant related contaminants entering the chamber eliminated – which can damage the rotors and consequently the efficiency of the pump.

Furthermore, the rotation of the claws offers great benefits. The shape of the rotors serves to remove deposited particles that may enter the pump, which makes claw pumps an ideal selection for applications in potentially corrosive environments. This again protects the casing and rotors from becoming damaged due to contamination. To further compound these properties, EuroVacuum Products claw pumps feature Teflon coating on the rotors and compression chamber to further protect against corrosion.

Stress minimisation

The inclusion of variable speed drives (VSDs) further enhances the performance of the pumps. Energy efficiency is claimed to be greatly increased during operation, especially during start up, with the VSDs minimising the stress on the pump during potentially hard wearing processes.

As the name suggests, the VSDs also offer unparalleled control for applications that require various speed requirements. In the long term, this can reduce energy costs for end users. The direct drive design also eliminates any concerns regarding belts – which can experience wear and require replacement.

Claw pumps require minimal space due to their compact design and are easy to install; saving time during installation and conserving precious capacity on the production floor. These benefits have seen claw pumps become a staple in a number of industries and processes, including packaging, CNC routing, pneumatic conveying, holding and lifting, wood works, pick and place, medical applications, plastic processes and central vacuum systems.

www.eurovacuumproducts.co.uk




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