Our products can be used for almost all industries, even industry-specific requirements such as FDA or NORSOK specifications can be met. We support markets such as: Food, Automotive, Pharmaceutical, Chemical & Process and Oil & Gas with our materials and products. Our dedicated quality management guarantees high quality and specialized products.ISO 9001 certificate
Specialist knowledge from several markets and synergies from different application areas are your guarantee for optimal and cost-efficient solutions.
Speed, reliability and flexibility, excellent product knowledge are what set us apart. Just-in-time is a matter of course. Use call-off blanket orders to reduce delivery times and cut costs.
Key features of KED-Seal’s new suite of elastomers:
Precision O-Rings in all common materials and according to international standards.
O-Rings made from special compounds - for highly qualified applications and specialized requirements. O-Rings are available in certified compounds according to standards:
Elastomers such as NBR, MVQ (silicone), FPM, EPDM, FFKM, FEPM
O-Rings PTFE coated
O-Rings FEP / PFA coated
O-Rings PTFE pure / seamless
FDA compliant / Standard 3A for multiple use - O-Rings made of FEPM / CHEMFLON® - for highly qualified applications and specialized requirements.
FEPM is a fluoroelastomer made from tetrafluoroethylene and propylene with a fluorine content of approximately 54% with outstanding resistance to petroleum products, steam and phosphate esters.
Extremely durable O-Rings and seals for Oil & Gas, Chemical and Pharmaceutical industries, Biotechnology and similar applications.
[ .. CHEMFLON® ]
Typical properties depending on compound/material:
NBR as standard material for applications in hydraulics and pneumatics, also many military elastomer specifications for use with fuels and oils require NBR as base polymer.
NBR compounds are superior to many other elastomers in terms of compression set and tear as well as abrasion resistance.
The abbreviation NBR is derived from Nitrile Butadiene Rubber. Nitrile rubber is obtained by copolymerizing acrylonitrile (ACN) and 1,3-butadiene.
Low-temperature compounds are offered specifically for use in contact with mineral oil-based fluids. For example, NBR can also meet other specific physical and chemical requirements through admixtures.
The acrylonitrile content in NBR influences behavior
The quality of an NBR compound is based on the percentage of acrylonitrile within the base polymer. The acrylonitrile content in NBR can range from 18% to 50% and affects
NBR compounds are superior to many other elastomers in terms of compression set and tear and abrasion resistance.
The NBR material cannot be used in concentrated acids (e.g. nitric acid, formic acid), concentrated oxidizing media (e.g. peracetic acid) and in aromatic and chlorinated hydrocarbons. No good properties against ozone, sunlight or weathering.
Aeronautical and aerospace O-Rings and seals in special applications with hydraulic oil for landing gear, flight controls, spoilers, flaps, valves and accumulators.
Industrial Seals Reliable seals for many applications where absolute safety, emission protection and low or no maintenance are required.
Reliable seals for many applications where absolute safety, emission protection and low-maintenance or maintenance-free operation are required. Particularly suitable in aerospace applications where Skydrol® is used.
EPDM is an elastomer made from ethylene and propylene monomers (ethylene-propylene copolymer), sometimes with additions of a third monomer (ethylene-propylene terpolymer) with a wide range of applications in process technology.
Available in EPDM:
Advantages of EPDM:
EPDM compounds are not recommended for use in contact with gasoline, mineral oil and lubricants, or hydrocarbon environments. EPDM has limited use in products containing grease and oil: Good properties with animal fats at low temperatures, not recommended in pure fats and oils at elevated temperatures.
Suitable applications for EPDM O-Rings
Aeronautics and aerospace O-Rings and seals in special applications for flight controls, engines, brake systems, spoilers, flaps, valves and pressure accumulators. Especially suitable when using Skydrol®!
Chemical and Pharmaceutical Industry / Food Extremely stressable O-Rings and seals for chemical, pharmaceutical, biotechnology and similar applications. FDA-compliant O-Rings and seals, sterilizable also ideally suited for use in SIP and ZIP. Excellent hot water and steam resistance. Reliable for long and maintenance-free processes.
O-Rings for equipment and machinery such as mechanical seals, valves, pumps, mixers and fermenters.
Only sealing elements made of perfluoroelastomer combine the almost universal chemical resistance of PTFE with the typical sealing properties of rubber and its compression set and creep resistance.
Perfluoroelastomers (FFKM) are terpolymers consisting of tetrafluoroethylene (TFE), perfluoromethyl vinyl ether (PMVE) and a crosslinking monomer (cure site monomer = CSM). Tetrafluoroethylene (TFE) provides the chemical resistance as the base monomer, while the elastic properties are achieved by crosslinking with PMVE as well as with the perfluorinated crosslinking monomer (CSM).
Typical features depending on the mixture/material:
Our recommendation: [ .. KEDFLON®]
For many applications there is little or no alternative to perfluoroelastomers.
Chemicals, Paints & Coatings, Semiconductor Technology, Clean Room Technology, Aerospace, Oil & Gas, etc.
Exceptional chemical and thermal resistance - any diameter.
Using a patented FFKM adhesive, KEDFLON round cord can be hot butt vulcanized and bonded together to any desired diameter. In hot-joint vulcanization, the two ends of the round cord are indissolubly cross-linked together at the molecular level and completely without necking, so that the joint is hardly noticeable.
KEDFLON FFKM round cords are available in the (American) standard cord sizes (mm) 1,78 | 2,62 | 3,53 | 5,33 | 6,99.
Our KEDFLON perfluoroelastomer (FFKM) round cords offer you not only exceptional chemical and thermal resistance, but also a combination of low compression set and excellent sealing properties at the same time..
For many applications, there is little or no alternative to perfluoroelastomers.
We supply O-Rings that can also be used in large diameters for gases, high pressure, vacuum or dynamic applications. Our O-Rings are vulcanized in stages using special processes and therefore have no 'seams'.
This results in a heavy-duty product that can be manufactured in virtually any size and cord thickness:
Since no tooling costs are incurred for standard cord thicknesses, the process is so cost-effective that even special designs and small quantities are economical. sind.
O-Rings with this manufacturing process can be made from a wide variety of elastomers / materials:
Even more cost-effective: The solution for less critical applications -> shock-vulcanized O-Rings!
Under pressure, only specially formulated elastomers can be used that have a very tightly cross-linked structure and thus are characterized by first-class physical properties, such as HNBR, FKM, FEKM and FFPM.
Chemically and thermally resistant seals and O-Rings for high stresses
Specially structured elastomers for increased safety.
The special FKM (fluororubber) reliably avoids damage to the seal even during extreme pressure changes or pressure reduction due to its special inner structure and correspondingly high hardness. Especially at high pressures, gap extrusion is avoided.Using the right seals for application areas with explosive decompression means a significant reduction in operating costs.
The key benefits:
Ask about our special KEDFLON™ against explosive decompression.
NORSOK/ISO approval for polymer sealing materials
As part of the approval process, KED-Seals had to demonstrate that its products met high standards for manufacturing technology and acceptance testing. This enables us to support our customers in obtaining NORSOK M710 / ISO 23936-2 approval for their assemblies.
NORSOK standards were developed by the Norwegian petroleum industry to provide reasonable assurance and also cost efficiency in the development and operation of equipment for its own economic factor, and thus to serve as reference standards for government regulations.
In accordance with Appendix C, the tests allow predictions to be made about the behavior of the polymeric materials and the service life of the seal in demanding oil production applications. Ideally, the materials should exceed the high product life of an oil and gas facility of 30 years. These standards are extremely stringent and recognized worldwide.
The NORSOK M-710 standard defines the requirements for critical non-metallic (polymeric) sealing materials for continuous use underwater and on valves in surface applications in critical gas systems. Likewise, the M-710 standard includes RGD testing (ED testing / Explosive Decompression) and testing of the effects of sour gas (H2S) with respect to the aging behavior of polymers.
FEP / PFA jacketed O-Rings consist of an elastic core e.g. fluororubber (FKM) or silicone rubber (MVQ)) for constant recovery and uniform contact pressure of the jacket on the sealing point and a seamless jacket made of high-quality fluoroplastics (FEP or PFA) for reliable sealing.
For flexibility and easy adaptation, an FKM or silicone hollow core is also suitable - from a cord thickness of 6 mm. We are also happy to supply special designs according to your requirements.
Jacketed O-Rings can be manufactured in almost any size. We can supply almost any inside diameter and cord size. To avoid buckling of the FEP / PFA jacket, the minimum inner diameter is limited.Suitable for extremely high thermal loads.
FEP / PFA jacketed O-Rings are resistant to most solvents and chemicals and have a very low coefficient of friction. The respective fluororubber or silicone rubber O-Ring is seamlessly enclosed by a thin-walled jacket made of FEP or PFA. The jacket is the essential component for chemical resistance to virtually all chemicals. At normal temperatures, the jacket guarantees protection against chemicals.
Not or only slightly resistant to
The FEP jacket of O-Rings has a very low permeability to gas and vapor, which increases with temperature and contact area and decreases with a thicker jacket. The lowest diffusion for FEP jacketed O-Rings occurs from a jacket thickness of 0.3 mm occurs.
The fluorinated elastomers (fluoroelastomers) are highly fluorinated carbon-based long polymer chains formed during vulcanization. This makes them more stable and resistant to high temperatures and chemical attack compared to other conventional elastomers.
FKM / FPM seals can be used in high vacuum applications and are suitable for use in aircraft, automobiles and other mechanical equipment, especially when maximum resistance to elevated temperatures and many fluids is required.
O-Rings and seals made of fluoroelastomer
Not / low resistant
FKM compounds often have a particularly high shrinkage rate. Special compounds have improved chemical resistance; in general, the greater the fluorine content, the higher the chemical resistance. FKM / FPM fluoroelastomers are more stable and resistant to high temperatures and chemical attack: cold resistance down to about -60°C, heat resistance up to about +250°C maximum.
X-Rings made of special compounds - for highly qualified applications and specialized requirements. X-Rings are available in certified compounds e.g. elastomer such as NBR, MVQ (silicone), FPM, FKM, EPDM, FFKM, FEPM (Chemflon®). X-Rings/ Quad-Rings are self-acting double-acting sealing elements:
The compression and injection processes used guarantee X Rings / Quad Rings with very tight manufacturing tolerances. Our Precision X Rings are mainly used in the aerospace, chemical and pharmaceutical, petrochemical and refinery industries.
X Rings are self-acting, double-acting sealing elements with a specially developed four-lip profile available in NBR, FKM, EPDM, FEPM, FFKM and MVQ.
Compared to an O-Ring, the X Ring offers a double sealing function. It requires less precompression, which results in reduced friction during dynamic use. Due to the specially developed four-lip profile, the X Ring does not tend to twist in the groove during reciprocating movements.
X Rings can be used as dynamic or static seals in a wide range of applications. The selection of the suitable material depends on temperature, pressure and the medium to be sealed.
Spring-assisted seals / lip seals made of PTFE (polytetrafluoroethylene) use a preloaded corrosion-resistant metal spring to create a tight seal. The metal spring is inserted into the U-shaped PTFE body as a preload element. The spring's clamping force reduces seal wear and compensates for eccentricity.
This provides sufficient sealing force even at low pressure. At high pressure, spring-loaded PTFE seals provide optimized sealing and reliable protection against leakage.
Frequently used PTFE compounds
Advantages with spring-supported seals / grooved rings made of PTFE:
Selecting the right gasket can increase average operating life, reducing costly and unplanned downtime, dangerous leaks and product contamination.
FDA compliant and biocompatible.
CHEMFLON® 1285 represents a new FEPM grade ( based on Aflas from AsahiGlass ) that is significantly superior to materials such as silicone, EPDM and FKM, especially under aggressive conditions. The applicable requirements for biocompatibility according to USP (United States Pharmacopeia) Class VI can also be met.
At the same time, CHEMFLON® 1285 is considerably more cost-effective than expensive FFKM / FDA materials.
Sanitary Gaskets made of CHEMFLON® 1285 according to FDA 21CFR177.2600 with FCN number are characterized by
They are available or can be manufactured in all sizes for Tri-Clover®, Tri-Clamp® installations as well as O-Rings according to AS-568A and, of course, also in customer-specific shapes.
Due to the high purity requirements in the pharmaceutical industry, problematic additives are replaced in the material and fillers are selected according to FDA regulations and guidelines. CHEMFLON® 1285 also complies with health standard 3-A for multiple use.
However, companies in the biotechnology, food and beverage industries also have increasingly stringent requirements in their manufacturing processes.
Hot water and steam resistance for applications such as
are in particular demand for the new applications in sterile technology and food production.
V-springs can be used in conjunction with plastic seals or elastomer seals, but can also be used as preload elements (spring-loaded seals or lip seals / spring-biased PTFE seals) or carriers.
The combination of the material properties of spring steel and high-quality PTFE fluoroplastics guarantees high and lasting elasticity, compensates for cold flow and wear on the sealing lip, and produces defined, low compressive forces.
These V-springs are available in 6 standard sizes and customer-defined formats or dimensions - according to your specific application requirements.
The combination of the material properties of spring steel and high-quality PTFE fluoroplastics is particularly suitable for
V-springs are particularly suitable in seals for static applications as flange or vessel seals and the sealing of rotating shafts as well as piston seals or rod seals.
Material and format according to requirements
Our V-springs are made of various stainless steels (e.g. Hastelloy C or Inconel, 316SS or 301SS) and coated with alloys such as gold, silver or nickel, offering corrosion resistance even under high loads. The springs are helically wound endless (self-contained) and have a round cross-section.
V-springs are insert elements (spring support elements) that give chemical-resistant sealing materials such as PTFE a constant preload without the usual settling behavior of elastomers or plastics.
They are used for
Slanted coil springs can be used in conjunction with plastic seals or also elastomer seals, but can also be used as preloading elements or drivers.
Our diametral springs are made of various stainless steels, such as Hastelloy C or Inconel, or other alloys such as gold, silver or nickel, and offer corrosion resistance even under high loads. These diametral springs are available in light, medium and high-load designs in both standard and custom formats or dimensions - according to your specific application requirements.
Diametral springs or tilted coil springs (springs with tilted coils) are self-contained annular coil springs or annular springs that are tilted along their center axis for axial loading so that within a given deflection range the force developed remains relatively constant. Diametral springs therefore have a very flat load curve.
Slanted coil springs or diametral springs give chemical-resistant seal materials additional spring properties and constant preload without the usual settling behavior of elastomers or plastics.
PTFE Spray is a high performance PTFE based lubricant for long term lubrication points throughout industry. Due to the high PTFE content (polytetrafluoroethylene), excellent lubricating properties, highest possible corrosion protection, water displacement and preservation are achieved in one product. PTFE spray is also suitable whenever other lubricants, such as mineral oils or silicones, are undesirable in the application or further processing.
PTFE has a high pressure and temperature resistance and guarantees self-lubrication over a longer period of time and at the same time ensures wear reduction.
PTFE spray is almost universally applicable in electrical engineering, mechanics, plastics processing, paper industry, textile industry, etc. and is excellently suited for the lubrication of conveyor belts, running bearings, slideways, rollers, guide rails, telescopic guides, in precision mechanics, on cable pulls, chains, gears, cogwheels and much more.
PTFE is particularly suitable for the pharmaceutical, biotechnology, food and beverage industries, i.e. when hygienic dry lubrication is required or when different materials are used, such as rubber on glass or wood on metal.
PTFE spray adheres even to microscopic irregularities and thus gives any material effective sliding properties.