Elmo Rietschle Further Industries

By clicking on an industry listed below, you will see their description and the correlated Elmo Rietschle products that will help with your vacuum and compressed gas needs.


In the production of bricks, roofing tiles, porcelain and technical ceramics, an important mark of quality is a product free of air pockets. When fired, ceramics containing such pockets can be destroyed in the kiln and, in extreme cases, can even cause the destruction of the entire batch. In bricks, this quality defect usually takes years to appear; during the winter, water penetrates the surface pores and causes them to burst.
Air removal from clay
After brick clay is loaded into the extruder, a vacuum serves to remove the air, thus preventing the formation of air pockets and the subsequent breakage of bricks. Similar to brick clay, ceramic clay is first placed in a mixer and pressurized with water or water vapour to form a homogeneous mixture. It is then transferred to an extruder where it is pressed into moulds under high pressure. The material is then extruded to the proper length, dried and fired.

Related Products:  Liquid RingSystems

Large volumes of compressed air and vacuum are required in the manufacturing process of hollow glassware. High quality and reliability of all units and components is of prime importance, because equipment failure during production invariably means extremely high costs. For continuous 24-hour operation, rotary vane compressors and vacuum pumps offer the best solution.

Compressed air is used to form the blanks in the production machines. A compressed air system is needed to control the various shaping devices and the general air supply of the factory.
Rotary vane vacuum pumps are used to evacuate the glass moulds. This ensures high product quality and increasing the number of pieces per hour poses no problem.

For higher volumes vacuum pump stands are used. These two-stage systems consist of a rotary lobe and rotary vane vacuum pump and are used in the production of electric light bulbs and fluorescent tubes.

Related Products: Systems

Circular and flat knitting machines
Textile dirt occurs at the fabrication of technical textiles. This dirt is extracted into a reservoir by the vacuum of a side channel blower.

Related Products: Side Channel
Draining and drying of dyed carpeting
After being dyed, carpeting must be washed and rinsed in clear water. In this process the carpet becomes soaked with water, which must then be extracted gently and economically. To do so the carpeting is passed over a suction roller with an adjustable suction slot. A vacuum pump connected to this suction roller draws air through the slot, thereby extracting about 80% of the water remaining in the carpet. The steady stream of air ensures a gentle treatment of the material. The continuous flow of water is easily removed and subsequently eliminated along with the operating liquid.

Related Products: Liquid Ring
Fabric cutting tables
To facilitate the positioning of heavy bolts of cloth for processing, an air cushion is generated in the cutting table via a perforated plate. Once the bolt is positioned, a vacuum holds the cloth in place for processing on the table top.

Related Products: Side Channel
Power air looms
To make it easier to change filling bobbins, the starting ends of the threads on the filling bobbins stacked in the magazine are automatically drawn in and tensioned. Once all the yarn on a filling bobbin has been used, the starting end of the thread is cut, extracted and placed in a thread receptacle in front of the blower. When the weaving process is completed, the edge of the fabric is vacuumed to prevent leftover thread from being dragged into the shed.

Related Products: Side Channel

Sock knitting machines
During the knitting process, compressed air is applied to hold the finished portion of the sock inside the stocking tube so that the knitting needles can work freely. Stray threads are vacuumed away. When knitting is finished, the socks are sucked out of the tube and into a bin by means of a compressed air line, which is connected to the receiving bins for the individual knitting machines.

Related Products: Side Channel

Steam treatment of yarn
Yarn in spinning machines is wound around spools, giving the thread a curled profile. To further process the yarn, however, the threads must be straight. For this purpose, steam is applied to the yarn to break the alignment of the material molecules and smooth out the fiber structure.

Related Products: Liquid Ring

A variety of vacuum pumps and compressors are used in the woodworking industry. The pumps are also used in woodworking as central vacuum systems; to improve efficiencies; and to minimise costs associated with hook-ups and special foundations which are no longer needed.
Holding and lifting
To ensure safe processing, work pieces are automatically clamped to the processing table by means of suction heads. A stable and constant minimum vacuum must be generated to ensure that work pieces are held securely in place during mechanical processing.

Related Products: Liquid RingClawSide ChannelRotary Vane

Before or after processing, wood must be protected against the destructive effects of environmental influences such as heat, moisture, insects and micro-organisms. The practice of soaking the wood in a preservative solution is widespread, but has the disadvantage that the liquid penetrates only a few millimetres into the wood. Complete protection is possible, however, if the wood is degassed and dried with the aid of a vacuum pump. The preservative agent then penetrates much deeper and optimizes the protective effect.

Related Products: Liquid Ring

Wood drying

The use of vacuum dryers in conventional wood drying chambers can reduce a typical drying time from several weeks to a mere 3 to 4 days. During the drying process, pressure in the chamber is gradually reduced to the minimum. The chamber is pressurized with steam and the air is extracted to prevent cracks and colour changes in the wood that can be caused by too high an oxygen content. Radial fans circulate the steam and convey the heat to the wood. Further steam condensate will be exhausted from the drying chamber.

Related Products: Liquid RingRotary Lobe

Air beds
Air beds are used for bed-ridden patients at risk for bedsores (decubitus ulcer). The use of air can bring about a distinct improvement in patients. Skin can dry and heal better if an air-permeable mattress is used. At the same time, inflating individual air chambers while deflating others varies the pressure on the skin, thus helping prevent bedsores. Through selective raising and lowering of different areas, air beds can also help position the patient for treatment and personal care.

Relevant Products: Side Channel
The cushion can be lifted with the help of compressed air to make it easier for older patients to stand up. Chairlifts also help the nursing staff to provide optimal treatment.

Relevant Products: Side Channel
Central vacuum systems
Central vacuum systems are used in hospitals and ambulant surgical centres to draw off liquids occurring during the surgeries. A separator is installed in the operating room to separate fine particles from the larger ones. If the operating room is too small, the vacuum system can alternatively also be installed remotely.

Relevant Products: Liquid Ring, Rotary Vane, Claw
Vacuum is used in dental equipment to draw off liquids such as cooling water from the drilling machine, saliva and blood. The side channel blowers used for these applications must be corrosion-proof.

Relevant Products: Side Channel, Rotary Vane
Steam sterilization (autoclaving)
Examples for application:

Textiles (clothes)
In a steam sterilizer the hot, saturated steam is condensed when coming into contact with the cooler object to be sterilized, which absorbs the heat released. This leads to the denaturation of the germs, the molecular structure of their protein being destroyed. Although dry heat can be used for sterilization as well, humid steam is more suitable for this application because the process then requires a lower temperature and shorter sterilization time. The sterilization process is determined by both biochemical and physical parameters, the efficacy of which can be determined with the help of experiments, i.e. by comparing the number of germs before and after the sterilization process.

Relevant Products: Liquid Ring
Technical and medical respiratory devices
Side channel blowers are used in portable or half stationary respiratory devices. In the medical part, e.g. for chronic pulmonary disease, the patience is supported at breathing.
In the technical part side channel blowers are used in respirators.
The advantages in both applications are the long life-time as well as the robust design.

Relevant Products: Side Channel

Drying of electronic components
Electronic components such as printed circuit boards are dried and cleaned with compressed air.

Related Products: Side Channel
Pick, Place and Assembling
Boards are assembled with electronic components, e.g. transistors, drags etc. Catch, place and drop off is done by vacuum supported pipettes.
For this process, Elmo Rietschle vacuum pumps from the L-Series and G-Series are perfect. Pre-engineered package systems are also available.

Related Products: Liquid RingSide ChannelRotary Lobe

In the pioneering age of pneumatic conveyance, demand was largely for transporting foodstuffs such as grain and flour. Today, such installations are constructed for a wide variety of uses, such as transporting

  • goods in dust particle form (flour, cement)
  • grain-type goods (dragées, granulate, pellets)
  • piece goods (pneumatic tube conveying systems) and
  • mixed goods.

Special requirements must be observed in these areas. Mixed goods, for example, may not be mixed with different size grains during transport. In addition, the goods should not rub together, which would cause abrasion. This is just as important for explosive granulate as it is for avoiding static electricity.

Pourable goods can generally be transported with vacuum or pressurized air conveyance systems.

Suction conveyance systems

The suctioned air creates a mixture of air and transported goods in the conveyance conduit. The conveyance apparatus extracts the granulate from the sieve filter. Operating data: Operating pressure is between –200 mbar and –500 mbar. The air velocity in the conveyance conduits determines the principle of operation. Depending on the goods being transported, this speed is about 20 m/s to 23 m/s.

The vacuum pump must be designed so that the air velocity in the conveyance conduits does not drop below the minimum rate, even at the machine located the farthest away, and that no plugs build up. This requires a higher air velocity at the pump High conveyance velocities, however, lead to increased wear of the conduits and to abrasion of the goods. Therefore, selecting the optimal air velocity or blower is of utmost importance. Optimal air volumes can be achieved in modern conveyance installations with frequency regulated vacuum pumps.

Relevant products: Side Channel, Liquid Ring, Rotary Vane, Claw


Pressure Conveyance Installation

A blower brings air sucked from the atmosphere to the required pressure level. As a result of the excess pressure, air flows into the conveyance conduit. A rotary air lock directs the goods being transported into the conveyance conduit. Air and goods flow through the conveyance conduit into the separator, which separates the goods from the air. The air flows through the clean air conduit back to the outside. The goods being transported leave the separator and are then stored, conveyed or processed. The movement of the goods depends on the means of conveyance and the construction of the conveyance installation.

Due to the low pressure difference available to suction conveyance systems, pneumatic suction conveyance installations have a larger conduit diameter than pressure conveyance systems, yet the volume of goods transported remains the same.

Relevant Products: Side Channel, Liquid Ring,Rotary Vane, Claw