Page 18 - RHP IT

Chemical-resistant and lubrication-free:

igus high-performance polymers for fluid

technology

he company igus creates
solutions to meet the
special requirements of
Tfluid technology. The range
of applications of iglidur plain
bearings, drylin linear guides and
lead screws is constantly growing. In
moving parts on pumps and drives,
plain bearings and linear bearings
manage without lubrication.
The iglidur products have proven
particularly successful in pumps, valves,
fittings and lifting systems. The drylin thread
technology is also used in fittings with rotary
knobs and vertical pumping movements.
Even aggressive media is no problem for the
chemical-resistant materials. Due to these
properties, plain bearings, piston rings and
dryspin lead screw nuts made of iglidur are
frequently used in fluid technology. Easy replacement with iglidur piston rings (Above) The iglidur products have proven
In fluid technology drives are moved by the in fittings and valves particularly successful in pumps, valves, fittings
effects of pressure on liquids or gases. This To move the fluids and gases used in fluid and lifting systems
mechanism is mainly used in pumps where the technology, the flow through the valves is
flow of fluids serves to propel movements. igus controlled. For this purpose, a closure section with is used in piston or rotary pumps where pistons as
plain bearings are made of high-performance sealing surface is pressed against an opening in well as gears or screws are used for displacement.
polymers for dynamic applications and are order to close it. Depending on the type of valve, The iglidur plain bearings meet the special bearing
continuously optimised for a wide range of diaphragms or pistons are used as closure sections. requirements of these bodies. They enable very
applications. In addition to the universal ‘all- Among other things, they can be automatically high precision and are also designed for high
rounders’, special solutions for food contact, very controlled by actuators. speeds and loads. In addition, they are suitable for
high or low temperatures, high loads and media The iglidur clip-on piston rings ensure that the tumbling loads caused by the pumping motion.
resistance have been developed. piston moves linearly without any lubrication. For In peristaltic pumps, where the medium is
In order to increase the mechanical load-bearing example, the cost-effective piston rings from igus forced through the housing with rotating rollers,
capacity, fibres and fillers are added to the are used to replace elaborately processed PTFE iglidur knife edge rollers are used, which are
material. There are also embedded solid lubricants tapes with just one guide ring, which is simply maintenance-free and wear-resistant. Normally,
that are released as soon as the running partner clipped into place. The possibility to eliminate plain bearings would not come into contact with
moves along the sliding surface of the plain lubricants is an advantage particularly in medical the medium in displacement pumps, however they
bearing. This self-lubricating effect ensures that technology and the beverage industry. Using the do so in flow pumps. A flow is generated by a
iglidur® plain bearings do not require piston ring product finder, you can select the rotating impeller, which drives the fluid. Depending
maintenance: external lubrication is not necessary suitable products online from more than 40 iglidur on the design of the pump, the motor and shaft
during installation or during operation. materials, for example, food-grade piston rings also run in the medium, which lubricates and cools
made of iglidur A350 or iglidur A181. the bearing. By using iglidur products, higher
Various possible uses in pump systems speeds and a longer service life can be achieved.
Whether in the rotor bearings of water pumps or as iglidur in pumps: chemical-resistant
knife edge rollers in peristaltic pumps - iglidur plain and wear-resistant dryspin technology for vibration-free
bearings can be used on a large number of moving Depending on the operation of the pumps, it is pumping
parts. Conventional solutions made of metal require roughly subdivided into displacement pumps and Vertical pumping movements must be performed as
complicated sealing to prevent the lubricant from flow pumps. In displacement pumps, the interior precisely and reliably as possible. Lead screws and
seeping into the medium. Failure of this seal results pump cavity is reduced by the movement of a body. matching lead screw nuts enable a smooth running
in contamination. The use of iglidur plain bearings The medium is displaced from the diminishing of vertical pumping motions. In addition to the
eliminates this risk. space and thus driven forward. For example, iglidur conventional drylin lead screws, the dryspin

18 INDUSTRIAL TECHNOLOGY • June 2021