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Shaft Seals
Shaft seals with PTFE sealing lip
are primarily used for sealing rotary shafts
Highlights
- Outstanding chemical resistance against aggressive media
- suitable for high temperature ranges between –60° and +220°C
- suitable also for use under low-lube or dry operating conditions
Typical Applications
- screw-type compressors
- centrifugal devices
- meat cutters
- fans/blowers
- mixers
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Sealing and Guiding Elements for Compressors
PTFE as a fluorocarbon compound (polytetra-ethylene) is a suitable basic compound for sealing and guiding elements used in compressors.
Highlights
- even without lubrication PTFE offers an exceptionally low friction coefficient when working together with metals
- PTFE is highly anti-adhesive, no stick-slip effect
- PTFE offers high elongation properties enabling sealing and guide rings to be mounted on single-part pistons with great ease
Typical Applications
- compressors with full or low lubrication
- rotary gas pumps
- expansion machinery
- liquid gas and vacuum pumps
- wobble piston compressors
- rotary compressors for loading and unloading silos
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Piston and Rod Seals
Spring-energized Seals
Spring-energized seals made of PTFE are used for sealing reciprocating pistons and rods as well as rotary and swiveling applications.
Highlights
- outstanding chemical resistance against aggressive media
- suitable for high temperature ranges between –95°C and +300°C
- suitable for media pressures up to 700 bar
Typical Applications
- needle seals in painting lines
- metering devices
- valve seals in bottling lines
- automotive and aerospace applications
- medical technology/endoscopy
- solenoid valves
- measuring technology/HPLC-technology
- general industrial machinery
- chemical equipment
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Engineering Design Elements and Functional Solutions Made of PTFE
The range comprises standard parts, parts based on customer drawings and/or parts developed in collaboration with customers.
Highlights
- Isostatically manufactured parts (less material consumption, better homo-geneity)
- Parts can be manufactured using machining technology (CNC- turning machines, NC-milling machine and finishing centers)
- Composite solutions combining various PTFE compounds as well as combinations with metals and lastics.
- In-house compound development
- Dimensions up to 3000 mm and/or 600 kg
Typical Applications
- PTFE O-rings
- Spheres (isostatic molding, resulting in high accuracy to gauge at variable temperatures
- Pumps/pump housings
- Valve seals (sealing plates for high differential pressures and high number of switching cycles).
- Wafer carriers
- Radomes (protection of RADAR antennae used in the aerospace sector)
- Slip ring seals
- Sliding bearings (bearing element + dry-lubricated PTFE-composite anti-friction coating)
- Dosing pistons with integrated piston ring (no undercut] – important for sterilization capability.
- Fire extinguishing nozzles for high voltage switches
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Laminates and Composite Materials with PTFE
The combination of PTFE-sheets and other flat materials enables the properties of base materials to be combined and improved.
Highlights
- Increase of E-module and tear resistance
- Reduction of cold flow
- Low thermal expansion coefficient
- Low permeation
- Improved adhesion
- PTFE-sheets combined with fabrics, fibers, metal foils, glass and elastomer films
Typical Applications
- Linings for chemical industry requirements
- High-strength compounds (XYMON)
- Guides and bearings
- Composite membranes
- Base materials for printed circuit boards
- Conveyor belts
- Customer-specific composites
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Piston and Rod Seals
Memory Packings
Memory packings made of PTFE are primarily used for sealing reciprocating pistons and rods
Highlights
- outstanding resistance against aggressive media
- suitable for high temperature ranges between –40°C and 200°C
- extremely low friction, no stick-slip effect
- pressure-resistant up to 20 bar
Typical Applications
- drill hammers
- vacuum pumps / wobble piston compressors
- solenoid valves
- pneumatic components
- filler valves for bottling lines
- metering devices
- food and pharmaceutical industry applications
- tank systems
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Porous PTFE
In-house developments have enabled us to manufacture PTFE in plate, sheet, tube and rod shapes.
Highlights
- Excellent chemical resistance
- Suitable for applications involving high temperature fluctuations between minus 200°C and plus 260°C.
- Optimal non-adhesive behavior
- Optimally suitable for cleansing
- Very good electrical insulation properties
- Flow rate for air and gases from 1 to 1000 ml/s*cm_ achievable
- Water hold-back value (e.g. the pressure required to push water through the pores)
- Porous PTFE is “whiter” than any other material
Typical Applications
- Diaphragms
- Pressure compensation seals in headlights, horns and airbags
- Reflectors for spectrometers
- Projection screens
- Sensors
- Separators
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PTFE Tubes
PTFE-tubes are preferably used by the chemical, electrical and mechanical industries with a continually rising trend in medical technology applications as well.
Highlights
- outstanding chemical resistance against aggressive media and hot vapors
- suitable for use at minus 200°C (with moderate mechanical stress)
- unfilled PTFE is physiologically neutral (FDA-approved)
Typical Applications
- syringes, catheters, vials and endoscopic devices for medical applications (single- or multi-lumen)
- degasification stations for liquid chromatography
- lining for sensors and fill level measuring devices
- linings for Bowden cables
- linings for electric heating elements in electro-plating and micro-electronics technologies
- insulations for high-voltage cables
- feeder hoses for spray-painting lines
- feeder hoses for foodstuffs, oils, resins, acids, alcalis, gases and solvents
- covers for fuser and feeder rollers
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PTFE- Sheets and Films
By combining the properties of PTFE and glass cloth, elongation at break, pressure resistance and flexibility could be improved significantly.
The production of PTFE composite compounds enables decisive improvements in terms of PTFE and carrier compound properties. The possibility of combining and mixing PTFE with different materials leads to new approaches in resolving material issues. For example, PTFE can be firmly bonded with metals, glass cloth and similar materials.
Highlights
- outstanding chemical resistance
- suitable for high temperature ranges between –200°C to 260°C
- very good anti-adhesive behavior
- good electric properties
- good mechanical properties
Typical Applications
- protective covers,
- corrosion protection
- bearing contact surfaces (protection against abrasion and friction)
- electrical insulation
- linings for engines and generators
- weather protection (radomes) for transmitting stations
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Diaphragms
PTFE diaphragms are used in metering devices, the pharmaceutical and food industries, in pumps for the chemical industry and in painting technology. Diaphragms are available made of PTFE, PTFE-elastomer-composites or as multi-layered PTFE-diaphragms.
Highlights
- virtually universal chemical resistance
- high temperature range between –60°C and +200°C
- high service life
Typical Applications
- metering pumps
- chemical technology
- valves
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Bellows
Bellows made of PTFE are primarily used in medical, food and chemical industry applications because of their exceptional compound characteristics.
Highlights
- resistant against virtually all chemicals
- high temperature range between –60°C and +200°C
- also suitable for food and pharmaceutical products
- excellent sterilization capability
- anti-adhesive
- cost-effective series production, from semi-finished products to finished products
Typical Applications
- bellows for use in pipelines
- shielding of sterile sections in bottling lines
- use in aseptic valves
- use in solenoid valves
- use in metering devices
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Multi-channel Nozzles
“Whispering” multi-channel nozzles:
Elring has developed a new way of keeping hazardous noise pollution under control. Wherever compressed-air-equipment is at work, Elring’s multi-channel nozzles provide both increased blowing power and significantly reduced noise.
Highlights
- reduction of sound levels
- savings through enhanced efficiency
- pinpointed blowing power – adjustable nozzle delivery cross-section
Typical Applications
- conveyor systems for production parts
- cleansing of compression-molding tools and production parts
- production of molded elastomer parts
- dust extraction from wells/bore holes
- compressed air cooling
- drying of adhesion surfaces
- blow-cleansing of crown cork caps in bottling lines
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High-performance Rollers
High-performance rollers with PTFE-, FPM-, silicone-, and PUR-coatings are used as fuser and feeder rollers in high-performance printers as well being used as feeder rollers in machinery and mechanical engineering.
Highlights
- high wear resistance
- good thermal conductivity
- high temperature resistance
- anti-adhesive behavior vis-á-vis toner, ink and other media
- outstanding surface quality and dimensional stability
Typical Applications
- fuser and feeder rollers for LED high-performance printers
- feeder rollers in the paper industry
- feeder rollers in dying machinery
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