Especially for rough industrial processes, Leybold introduces the uncomplicated, dry rough vacuum ClawVac pump. Besides food processing, packaging and environmental technology applications, it is suitable for drying and sterilization processes. The pump, which is offered in three pumping speed classes, is specially designed for continuous operation at every working pressure. Additionally the special pump design avoids that oil comes into contact with pumped gases, what allows higher oxygen applications.

Leybold also offers with the ClawVac System series a new multiple pump system. These systems are based on ClawVac and offer a redundant plug-and-play solution.

The daily use of ClawVac is uncomplicated: Thanks to the self-supporting construction, the vacuum generator is easily accessible. That allows the pump to be directly cleaned on-site. The simple handling of the robust pump can also be attributed to its operating principle: A pair of claw rotors rotating in the pump stator completely free of contact and wear. ClawVac also distinguishes itself from standard claw pumps on the market by the choice of materials. Rotors made of stainless steel and a corrosion-resistant coated vacuum chamber makes it suitable under harsh process conditions. This makes an important contribution to reliable operation.

The modular pump design allows for quickly dismantling, opening and cleaning the pump essentials as the pumping chamber and the silencer. For a mechanic these steps can be done in a few minutes and the frequency is purely depending on the  hardness of the process. Except the 20,000 hour oil and lip seal replacement, no further regular maintenance is required and
additionally it is independent of the application. “Thanks to this pump characteristic, we have reduced the amount of servicing required and improved the environmental balance,” said Niels Gorrebeeck, Product Manager Rough Vacuum, Leybold.

The ClawVac design allows the user to disassemble and clean the claws quickly and easily as the rotors can be removed without having to readjust the synchronization. This primarily relieves customers with rough and dirty processes, whose pumps previously needed a synchronization at the manufacturer side. The ClawVac set-up is based on a quick component replacement, which has to ensure a minimal downtime and low service costs.

On the basis of ClawVac, Leybold also has a new multiple pump system in its program, a powerful plug-and-play solution. Especially for packaging plants, pneumatic conveying lines or clamping devices of CNC machines the multi claw pumps are a reliable solution. This also applies to plastics processing machines, drying processes and central vacuum supplies.

Depending on the required flow rate, the systems contain two to four ClawVac pumps in one housing. “The robust, long-life pumps operate in an intelligent controlled dry and air-cooled solution,” summarized Gorrebeeck. “On top of that, ClawVac System only delivers the required vacuum.” One pump is speed-controlled, which allows the exact adjustment of the generated vacuum. The intelligent control activates or deactivates the other fixed speed pumps based on the vacuum need. This speed control reduces the necessary energy consumption and  CO2 emissions.

“During the design we strongly focused on the customer needs as a high redundancy level, minimal maintenance needs and stable vacuum supply even in harsh environments,” said Gorrebeeck. The earlier mentioned constant vacuum level guarantees the customer product quality in all conditions, the same intelligent control equalizes the running hours of the fixed-speed pumps. The control principle is even as such developed that the ClawVac System keeps on running, even with half of it pumps active.

With this multiple pump system, Leybold brings all necessary components under one enclosure and offers at the same way a compact, intelligent system solution. The robust housing protects the pumps, reduces noise and heat and combines all the technology necessary for operation in one box.

Leybold offers these space-saving systems with pumping speeds between 604 and 1144 m3/h. As with the individual claw pumps, the system also allows a ultimate pressure up to 140 mbar absolute.

Leybold
www.leybold.com