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Vacuum pumps are frequently found in different cheese manufacturing processes: filtering, drying, sterilisation, packaging, etc. However, another new application is being introduced very quickly: vacuum cheese demoulding.
Until now, the demoulding process was carried out by mechanical means or by pressure using compressed air. These methods do not treat the piece well, as it is still fresh and may be damaged and even broken.
In addition to the diminished quality, there is also the inconvenience of the cheese falling and in disarray on the conveyor belt, as a result of the violent ejection produced by the compressed air. This makes it necessary to install a cheese reorganisation station. All of that could be avoided if the pieces were demoulded by vacuum.
Busch Ibérica has proposed its Mini Mink claw-type dry pump for automation of the demoulding process with vacuum suction cups.This pump, which is available with air flows from 62 m³/h and vacuum levels of 60 mbar, in addition to the benefit of requiring no water or oil for its operation, is maintenance-free. It can also be supplied with an anti-corrosion internal covering to make it more resistant to facility washing processes.
The claw system designed by Busch is adjusted well enough to provide a 94% vacuum without requiring an oil seal. Furthermore, since there is no contact between the claws, or between the claws and the pump casing, there is no friction or wear, and no maintenance is required.
This pump provides the air flow and vacuum level required for the suction cups to extract both round and long cheeses easily and place them gently on the conveyor belt.
Busch Ibérica, S.A.
North Division
June 2007
The Cobra NB dry vacuum pump in electrical machine manufacturing
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The need to use a vacuum is quite common in some electric motor or transformer manufacturing processes. Vacuum impregnation of the coils, insulating paper drying, or oil degassing are some significant examples of these processes.
The conventional vacuum pumps used are vane or rotary piston pumps, which all require lubrication with recirculated oil. This fact, which normally makes them highly robust in most applications, makes them vulnerable in these cases, since the oil becomes contaminated either by the resin vapours in impregnation applications, or by the water when drying.
Busch has a vacuum pump that is immune to these contamination problems: the COBRA NB dry screw pump, with a vacuum limit of more than 0,01 mbar and flow rates from 100 to 600 m³/h.
The special screw design distributes the compression proportionally along its entire length, keeping it from being concentrated only in the final phase, thus avoiding the risk of corrosion even with water condensation inside.This pump is cooled with a water jacket, but it can also be supplied with a built-in radiator for a closed-circuit cooling system. This makes it independent, enabling it to be moved from one place to another easily.
In the coil insulating paper drying process, vacuum levels of between 0,1 and 1 mbar are often required. If single-stage vane pumps are used, this vacuum level can only be achieved if a roots is placed on top to provide the necessary air flow at the end of the required vacuum range. The COBRA pump does not require the use of a roots, since it is capable of providing sufficient vacuum on its own while maintaining the nominal air flow from the beginning of the process (atmospheric pressure) to the end. A 300 m³/h COBRA has been proven to achieve better performance levels than with a combination of a 100 m³/h primary and a 500 m³/h roots.
In drying process where, in addition to vacuum-heat cycles, thermal conductivity accelerators are used, these products can be condensed in the exhaust and reused entirely. If the characteristics require classifying the zone as ATEX, the COBRA pump can be certified at the maximum ATEX category: category 1, which oil pumps are unable to achieve.
Internal contamination due to condensation is completely eliminated because it is a dry pump. The water vapour is carried to the exterior, and the condensates produced by internal compression are quickly evaporated, since the working temperature is around 100ºC. While the water is evaporating, the pump is not corroded in any way due to the special design of the screws. To offer redundant security, this pump can be supplied with a Teflon covering.
In impregnation processes, pump contamination is caused by resin vapours which, when they react with the oil, can cause the pump to seize up completely. For this application, the COBRA includes a self-cleaning system which, once the process is complete, automatically injects an amount of solvent to eliminate any remaining volatile resin elements that may have been left on the walls or screws, leaving it ready for the next use.
Busch Ibérica, S.A.
North Division
June 2007
Busch vacuum pumps at treatment plants
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Busch has supplied three Mink MM claw-type dry vacuum pump units for the Waste Water Treatment Plant in San Pedro del Pinatar, Murcia.
The water to be treated in the membrane tanks contains a certain amount of dissolved air. The horizontal centrifugal pumps used to displace this water are incapable of removing significant amounts of air, which must be eliminated to prime the system and prepare it for operations.
Liquid ring pumps were formerly used for this purpose, but the operation and maintenance costs for that type of pump were much higher than for the new Mink MM claw-type dry vacuum pump. Furthermore, as a dry pump, it is more environmentally friendly.
Busch offers specific vacuum solutions for each application.
Busch Ibérica, S.A.
East Division
June 2007
Combi vacuum pump stands from Busch
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With the inclusion of the Combi product range, Busch can now offer a complete series of vacuum pump stands that has been significantly extended and standardised. Combi vacuum pump stands have been designed for vacuum supplies in the rough and fine vacuum range and can be used in practically all industrial applications.
Combi vacuum pump stands are always a combination of different vacuum pumps into one vacuum supply unit. Thanks to the almost infinite possible combinations of vacuum pumps into Combi pump stands, working pressure and suction capacity can be adapted quite individually to the process conditions and exactly to the media to be conveyed. At Busch, experienced project engineers and our very own design program, which calculates the ideal vacuum pump combination taking all the relevant parameters into consideration, are responsible for the optimum design of Combi vacuum pump stands according to customers' particular requirements. Combi vacuum pump stands can be used in all vacuum ranges of atmospheric pressure up to <1 .10-³ hPa (mbar). Suction volumes of up to 4000 m³/h can be achieved with standard pump combinations, with greater suction capacities also possible.
A Combi vacuum pump stand basically comprises a Puma or Panda Roots vacuum pump and an R 5 oil-lubricated rotary vane vacuum pump or a COBRA screw vacuum pump as a pre-pump. The choice of pre-pump depends on the medium to be conveyed. Respective special versions are available for conveying oxygen, reactive gases or for use under ATEX-related conditions. In addition to standard applications such as drying or degassing processes, Combi vacuum pump stands can be used in coating processes in metallurgy and the plastic industry, for photovoltaic applications and the manufacture of flat screens. Semiconductor production, plasma surface cleaning, plasma sterilisation and heat treatment furnaces are further application areas for Combi vacuum pump stands. The vacuum pumps in Combi pump stands are assembled directly onto one another, making them extremely compact and space-saving.
Busch Vacuum Pumps and Systems
Marketing/Marketing Services
Maulburg, September 17, 2007
New vacuum technology for milking machines
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Busch has developed a new vacuum pump especially for milking machine requirements - the pump generates the vacuum required for suctioning the milk almost maintenance-free, without using oil, and extremely economically.
This new Mink claw vacuum pump compresses without contact. This means there are no parts in the compression chamber that touch during vacuum pump operation. Thus the Mink vacuum pump works completely wear-free. Oil or other operating materials are not required. The rotary vane vacuum pumps lubricated by fresh oil that have previously often been used for milking machines require the oil to be replenished regularly and the used oil to be disposed of. These jobs, and thus of course the working time and costs related to them, no longer have to be performed by the operator of a milking machine with Mink vacuum technology. The only thing necessary is a gear oil change after 20,000 operating hours. Which at eight operating hours a day means that this oil change should be carried out every seven years. Since there are no wearing parts, costs for maintenance work, part replacement and acquisition are a thing of the past.
Mink claw vacuum pumps are already being used as standard by major manufacturers of automatic milking machines. Conversion of existing machines is possible at any time. With eight different sizes, the Mink vacuum pump can be ideally dimensioned for all sizes of milking machine.
Busch is one of the largest manufacturers of vacuum pumps in the world and delivers these to a wide range of different industries. Thanks to 48 companies of its own and a dense service network, Busch is a global presence.
Busch Vacuum Pumps and Systems
Marketing/Marketing Services
Maulburg, July 27, 2007
Quick packing
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The company Dr.-Ing. K. Busch GmbH recently presented its new generation of R 5 vacuum pumps for the first time. These vacuum pumps can be used in all kinds of packaging machines, from small chamber machines to large-scale roller machines and make significantly shorter packaging cycle times possible.
These shorter packaging times have been made possible by the greater vacuum achieved by the vacuum pumps. This also makes the suction capacity achieved at packaging vacuum up to 50% higher than with previous rotary vane vacuum pumps. Busch offers these new R 5 vacuum pumps in a wide range of sizes from 25 to 1600 m³/h suction capacity. The outer dimensions and all the connection dimensions are unchanged from the previous version.
Oil separation has also been improved with all the design sizes, through the internal geometry of the oil mist separator and the permanent advanced development of filter technology. Original Busch filter elements have been matched exactly to the respective vacuum pump size and guarantee the maximum degree of separation by taking the latest developments in filtering technology into account. R 5 rotary vane vacuum pumps from Busch can be used both for long-term operation and at short intervals. These tried-and-trusted and sturdy vacuum pumps have been in use for decades all over the world, wherever meat and cold cuts are processed and packed. R 5 vacuum pumps from Busch set industrial benchmarks in many other applications, too.
Busch Vacuum Pumps and Systems
Marketing/Marketing Services
Maulburg, June 26, 2007
Vacuum pumps for clamping and fixing
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 Mink claw vacuum pump |
The Mink claw vacuum pump will be presented by Dr.-Ing. K. Busch GmbH at Ligna 2007. This vacuum pump is now available with a volume flow rate of 70 to 500 m³/h and thus fully covers the power requirement for applications in wood machining. Mink vacuum pumps fundamentally differ from conventional vacuum pumps in that they operate without contact and with zero wear. Due to their contact-free operating principle no oil is required as an operating fluid. For the operator this means: No replacement of worn parts, no oil changes and no shutdown periods. The maintenance work on a Mink vacuum pump is restricted to cleaning the intake filter and changing the operating oil after 20.000 operating hours. Because of its high efficiency the Mink is essentially more economical to operate than all other vacuum pumps. This leads to potential energy savings up to 60% relative to a dry-sealed rotary vane vacuum pump.
Mink vacuum pumps can be driven with a frequency-regulated motor. This provides further energy savings, since the vacuum pump only draws the current from the mains that is actually required. Due to the minimal maintenance work required the maintenance costs are reduced drastically relative to other vacuum pumps.
Mink vacuum pumps from Busch are ideal vacuum creators for clamping tasks on processing machinery and on component equipping machines where a reliable and safe vacuum is imperative.
Dr.-Ing. K. Busch GmbH
Hall 24, Stand D 21
Busch Vacuum Pumps and Systems
Marketing/Marketing Services
Maulburg, February 15, 2007