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Metal-O-rings and C-rings for extreme operating conditions
From ultrahigh vacuum up to 6800 bar (100000 psi) pressure and temperatures from -269°C cryogenic up to +980°C (-425°F up to 1800°F).
Resistant to chemicals to a large extent.
GFD metal O-rings have been developed as a secure sealing of gases and liquids. They even can be used in case of extreme conditions. These static and metallic sealing elements can be applied in ranges of ultrahigh vacuum and up to a pressure of 6800 bar. They are suitable in case of continous temperatures from 269 degrees centigrade below zero up to 980 degrees centigrade above zero and resistant to radioactive radiation, chlorides, corrosion and other aggressive influences. They neither age in use or during storage.
Advantages:
With conventional flanged joints many technical data, from which only very few are precisely available during the design state, have to be known for the calculation. Also the values for the rigidity of the flange, the screws etc. have to be available. The consequence are extensive calculations with imprecise or assumed values and the involved disadvantages. There is always a defined initial tension, no setting and smaller flange and screw dimensions with the GFD metal-O-rings or lip seals. The proof has not to be furnished with complicated and difficult calculations about unknown quantities but simply by adding the forces of pressure to the operating pressures.
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General Information
HTMS Metal- O-Ring seals are made from high precision metal tube. Contrary to flat gaskets, HTMS Metal-O- Rings require extreme low bolting load. Because they feature a certain resiliency or spring back, HTMS Metal O Rings will compensate minor flange rotation and maintain positive sealing load to the sealing surface.
For sealing thin gas or low viscosity fluids, HTMS recommend to soft plate the bare metal seal with such materials as silver, gold or tin. Also PTFE as a coating is available.
HTMS Metal O Rings are made for internal or external pressure. For high pressure application HTMS advises vented or system pressure assisted Metal O Rings.
For extreme low leakage requirements at elevated temperatures HTMS also produces spring energized metal O Rings. This “OS” design is basically a metal O Ring with an inserted high tensile spring.
Metal O Ring availability
- From 6 mm to +3000 mm diameter
- Cross section from 0, 89 mm to 12, 7 mm
- In house plating, Silver, Gold, Tin and others
- Spring energized versions for extreme tightness
- Available in shaped forms
- For internal or external pressure
Metal O-Rings capability
- Temperatures from cryogenic (- 270°C) up to high temperatures (+ 900°C)
- Ultra hard vacuum and pressures op to +300Mpa
- Handles hydrogen gas up to non- Newtonian fluids
- Moderate pressure capability
- Lowest leak rate
- Radiation resistant
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The metallic ring joint gaskets are manufactured according to the API 6A and ASME B16.20 standards for application at elevated temperatures and pressures. The small sealing area with high contact pressure results in great reliability. The contact surfaces of the gaskets and flange should be carefully processed. Some types of ring-joints are pressure activated, that is, the greater the pressure the better the sealability.
Advantages
* The metal ring joint gaskets have been designed to withstand exceptionally high assembly loads over a small area, thus producing high seating stresses.
Shape and construction
The DONIT TESNIT® ring joint gaskets are produced in several shapes and sizes to meet the most demanding applications.
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Layers of all metal gaskets are formed into four cross-sectional profiles (round, rectangular, round with tail and double round with tail) and into a range of sizes to suite a large number of applications. Available in seven wire types: monel, tinned copper clad steel, stainless steel, beryllium copper, tinned copper, aluminium.
All metal gaskets offer excellent EMI shielding performance, providing electrical continuity when compressed between two mating surfaces.
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Intended for the industrial applications under strong constraints of pressure and temperature, the metal and semi-metal joints of high technology ensure safety and quality under extreme conditions of use.
The variety of joints KLINGER, KEMPCHEN and IMPERATOR Industries proposed by the Group Eynard Robin makes it possible to answer many applications:
- spiral joints: for needs requiring a security level and for sealing, resistance to strong pressures
- metal gaskets: for the installations high pressure and high temperature. Without coating, ideal sealing on vapor applications without thermal cycle
- copper asbestos joints EYRMET: for industries petrochemical, chemical, iron and steel, automobile...
- annular joints metal EYRING: excellent resistance to high temperatures and high pressures.
- crimped joints EYRCLIP: for uses at extreme temperatures with thermal shock: , joint cylinder head gasket of exhaust...
- joints Graphitor IMPERATOR: application on the valves and fittings, the supports of body of apparatus and, according to the models, in the nuclear and marine sectors
- corrugated joints EYRCOR: without coating, excellent shear strength for a screwed tightening. With coating, broad beach of use thanks to the flexibility of the metal heart
- also available: flat joints metal EYRMAT, welding seams KEMPCHEN, lenticular joints KEMPCHEN, deflecting joints profile T4 KEMPCHEN, O rings metal EYRTOR...
Several of these products are referred PMUC (Graphitor, Metagraph) for a nuclear application.
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These exceptionally versatile gaskets solve many flange sealing problems for industry. They have either a metal core with sealing materials on both flat surfaces, or a pliable core encased in a thin metallic casing.
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The DONIT TESNIT® grooved gasket is the preferred gasket when improved performance at low seating stresses is required. It features excellent anti-blowout properties linked with the reliability of a solid metal-to-metal seal combined with a soft sealing face to provide a tighter joint. Metal gaskets with grooved faces have proven to be very effective for sealing flange connections, and are particularly suitable for applications where high temperatures, pressures and fluctuating conditions are encountered. Non-metal cover layers ensure that flanges are not damaged, even at extreme loads, and provide excellent sealing properties when supported by the grooved metallic gasket. The DONIT TESNIT® grooved gasket is an ideal replacement for problem applications associated with jacketed gaskets, for heat exchangers, vessels and reactors and various flanged connections.
Advantages
* Capable of sealing pressures exceeding 250 bar.
* Capable of withstanding temperatures up to 700°C.
* Particularly effective in maintaining performance under condition of fluctuating temperatures and pressures.
* Solid construction provides stability even for large diameters and ensures trouble-free handling and installation.
* Gaskets can be fitted to existing assemblies without modification.
Shape and construction
The DONIT TESNIT® grooved gaskets are produced in several types to fit the most demanding applications.
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Metallic Gaskets
Innovative metal gaskets designed to standard and customer configurations. Incorporating a wide range of quality materials to suit all process applications.
Flat Metal Rings
JDG
JPR
Kammprofile
Serrated solid metal core for rigidity coupled with a deformable sealing material for compressibility ensures tight, reliable sealing even under low bolt loads. Durable and tight in extreme temperature and pressure fluctuations.
Ring Joints
Spiral Wound Graphite
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O-Rings Seals in standard and metric dimensions and different compounds always available ex stock.
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Our seven million stocked 'O' rings include inch sizes and metric sizes to a range of international, national and industry standards.
These are held in a variety of general and high performance elastomers to suit the vast majority of industrial and specialist oil and gas sector applications.
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- Featuring Simriz proprietary perfluoroelastomers
- In-house tool shop
- Clean room molding and packaging
- Off-the-shelf availability from Simrit warehouse
- Tooled on all AS568a sizes and most standard metric sizes
- Compression and injection molding
- Cryogenic and punch trim deflashing
- Facility locations: Santa Ana, CA; LaGrange, GA; Cuautla, Mexico Tokyo, Japan; Pinerolo, Italy
- Certifications: ISO 9001, ISO 9002, QS-9000, AS-9000, BQMS/ D1-9000, A2LA Laboratory, EN9100, VDA 6.1
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O-rings
LJF® is the world’s third largest producer of O-rings. The many references produced at the Château-Gontier and Bezons sites are intended for three major markets: automotive, aeronautical and general industry.
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Slectionnez une ligne du tableau ci-dessous :
L (mm) A (mm) P (230 V) (W)
1 300 45 255
2 350 45 305
3 400 45 355
4 450 45 405
5 500 45 455
6 550 45 505
7 600 45 555
8 700 45 655
9 800 45 755
10 900 45 855
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O-rings are a Seal Science specialty. Utilizing advanced material science, SSI provides O-ring solutions in many types of elastomeric/ rubber compounds. SSI incorporates advanced materials in its design methodology ranging from Perfluoroelastomers to alloy filled conductives elastomers.
SSI utilizes on-site molding making capabilities to provide molded O-rings from .030” inches OD to over 40.0 inches. SSI has the capability for performance molding of O-rings with ultra critical measurement tolerances, as well as providing less critical, economically costed, high volume supply alternatives.
Seal Science incorporated finite element analysis (FEA) in its O-ring design to develop the most optimal size seal for an application.
SSI has a complete compound development capability to provide O-rings made from current off-the-shelf (COTS), and custom engineered elastomers made from the following:
- Silicones
- Fluorosilicones
- Isoprene
- Nitriles (Lubricated and High Strength)
- Conductive Elastomers
- Perfluoroelastomers
- Styrene-Butadiene (SBR)
- Ethylene acrylic
- Aflas®
- Butyl
- Chloroprene (Neoprene®)
- Ethylene Propylene (EPDM)
- Fluorocarbon GLT & GFLT
- Fluoroelastomers (Viton®)
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O-rings
Our application oriented ranges cover all the dimensions required for Europe and the USA and are fully certified. We can also offer solutions for chemically and thermally challenging applications.
O-rings High Performance
O-rings HITEC®
O-rings NORMATEC®
O-rings special
X-rings
Back-up-rings
Accessories
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FEP O-Ring
Encapsulated O-Ring is produced from silicon or fluorocarbon with a seamless FEP jacket. These seals can solve sealing problems due to their chemical resistance coupled with elastic properties and low friction. Available to ISO 3601, AS 568 B, BS 1806 and BS 4518 and other standards including hollow and square sections. Available in both inch and metric sizes.
Isolast® Perfluoroelastomer O-Ring
Isolast® is a perfluoroelastomer that combines the elastic properties of fluorocarbon (FKM) with the outstanding chemical resistance and the high temperature stability of PTFE. Isolast® seals can be used for applications in high temperature service up to appr. +325°C. Isolast® O-Rings are available in metric and inch dimensions to ISO 3601, AS 568 B, BS 1806 and BS 4518, cords, foils, molded slabs and custom molded parts.
O-Ring
Double acting seal for static and dynamic applications. Available in various materials e.g. nitrile (NBR), fluorocarbon (FKM), ethylene propylene (EPDM), chloroprene, silicon, fluorosilicone, etc. Polyurethane is available in hardness 70 to 93 Shore A for high wear and extrusion resistance with low friction. Available to ISO 3601, AS 568 B, BS 1806, BS 4518 and other recognised standards.
PTFE O-Ring
For axial static face or flange type applications. Resistant to practically all chemicals and to high temperatures. Available in any desired size.
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ERIKS has developed an entire series of 200 compounds that satisfy various international standards. ERIKS also produces the FDA specifications in small quantities in over 40 compounds to 5000 mm in diameter.
* standard range of 15,000 sizes in stock
* production of specific compounds
* international standards
* quality manual, data sheets
* Quad-rings®, back-up rings, cords
* compounds produced to the following industrial standards
* online or calculation programm
Types of material
* Teflex
* NBR
* EPDM
* CR
* ACM
* PUR
* Silicone
* Fluorsilicone
* Aflas
* Viton®
* Kalrez®
* High Purity compounds
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O-Rings
To national and international standards: AS 568A, ISO 3601, DIN 3771, JIS and metric. Custom sizes of almost any dimension
Miniature O-rings and large special O-rings continuously molded from spliced cord
Perfluorinated (FFKM) O-rings. Broadest chemical resistance, highest purity and temperature resistance of any elastomeric family - up to 320°C/608°F
Compounds
O-rings can be molded in a wide range of compounds in hardnesses
from 30 to 95 Shore A. These materials include:
Acrylonitrile-Butadiene (NBR)
Butyl (IIR)
Chloroprene (CR)
Ethylene Acrylic (AEM)
Ethylene Propylene (EPDM)
Fluorocarbon (FKM)
Fluorosilicone (FVMQ)
Hydrogenated Nitrile (HNBR)
Perfluoroelastomer (FFKM)
Polyacrylate (ACM)
Polytetrafluoroethylene (PTFE)
Silicone (VMQ)
Parker O-ring compounds are formulated to meet the most stringent
industry standards, including NSF, Underwriters Laboratories (UL),
Military (MIL-SPEC), Aerospace (AMS), NASA, FDA, USDA, USP, and many customer-specific requirements.
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Greene, Tweed has a wide selection of standard O-rings available, as well as the capability to make custom designs. O-rings constructed from Greene, Tweed's high-performance elastomers are built to handle extreme conditions in diverse markets, from Aerospace, Fluid Handling, Industrial, Medical, and Oilfield--where rigid regulation and testing requirements must be met--to Semiconductor--where cleanliness is critical to process integrity.
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Perfect resistance.
Orobica Plast-Gom is highly experienced in elastomer technology and specialized in the production of gaskets for plate heat exchangers. Its technical division works alongside customers and designs different types of gaskets to satisfy the market, based on a simple drawing or an existing sample. All the departments are equipped with technological machinery and highly qualified staff, who first make the moulds and then the gaskets, which are vulcanized by compression or injection technology. The company is capable of making gaskets of any material, shape or size and for any type of heat exchanger. The gaskets are mounted using glue or clips. Orobica Plast-Gom also collaborates with world-renowned research labs to improve existing mixtures as well as study and test new specific elastomers. This means that it can guarantee more efficient, durable and reliable gaskets even when used in heavy-duty industrial applications, therefore cutting maintenance time and running costs.
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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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Particularly adapted to the drug companies and agroalimentary (conformity FDA), the joints "jacket" PTFE are used for all the aggressive processes. They are composed of a heart which confers necessary mechanical qualities to them, and of an envelope PTFE which protects it from corrosion.
The Group Eynard Robin manufactures and distributes:
- the joints jacket PTFE EYRFLON: gone up on metal supports out of glass, graphite, plastic, or covered or vitrified steel (enamel)
- the joints jacket PTFE EYRTEX: especially developed for applications ATEX, they are equipped with a metal leg connected to the mass of the apparatus which avoids the risks of lighting and explosion. This system collects the static electricity generated by the circulation of the product and makes it possible to evacuate the electric potential with the support.
The Group Eynard Robin proposes a broad choice of dimensions, matters and profiles of heart and envelopes.
The joints jacket PTFE EYRFLON and EYRTEX can be used
- in standard and/or severe applications
- in corrosive ambient condition or ultra-aggressive
- on the vacuum
- at temperatures being able to reach until 220°C
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The sealing insert is made of corrugated stainless steel, soft gasketing material or rubber. This insert is coated with PTFE and open on one side, usually on the outside. Thanks to the high chemical stability, good mechanical properties and permanent resistance in the atmosphere (humidity, gases, temperature changes) they are suitable for all types of gaskets and different media, mostly for aggressive chemicals.
Advantages
Thanks to the high stability of C-F bond virgin PTFE, which is used for the envelope, exhibits extraordinary chemical resistance. Combinations of two or more insert materials allow a large number of different applications.
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Conceived to obtain an excellent level of sealing whatever the pressure level or temperature, the O rings are used in all the fields of industry, in static and dynamic application. It is the integration of a ring with circular section (torus) in a throat dimensioned according to the diameter of the joint which ensures the perfect sealing of the product.
O rings PTFE require a weak tightening torque and adapt to a large range of operating conditions:
- resistance to temperatures of - 200 to + 260 °C
- adaptation to all the aggressive chemical fluids, with cryogenics, the vacuum and the gas
- diameters available from 1 to 12 mm according to the standards
- various materials of composition: rubber, materials plastic or various metals.
Available out of PTFE, silicone, Viton®, EPDM, nitrile, fluorocarbon, chloroprene, perflouélastomère, the Group Eynard Robin also proposes a broad range of O rings metal or covered out of alloy nickel, stainless steel or hastelloy (EYTOR and EYCAP).
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- Dedicated manufacturing facilities
- Quick quote ability
- Multiple material colors
- Banded piston technology
- Global manufacturing
- Small lot manufacturing
- Custom material compounding
- Facility locations : Troy, OH; Findlay, OH
- Certifications: ISO 9001, ISO 9002, QS-9000
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The requirement for low coefficients of friction, less than .08, temperatures ranging from -300F to +550F, pressures in excess of 5000 psi, the need to seal a corrosive acid .....These are the typical kinds of factors that tell you that an elastomeric seal probably wont fit your application.
Seal Science PTFE or Teflon® Seals and Seal Science Perflex perfluoroelastomer are often the answer. Possibly something as simple as a PTFE O-Ring, or a PTFE compound cap to protect the elastomer will do. Or maybe, spring energized PTFE U-Cups, like those in our Polyspring line might be needed.
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All SENTINEL® Filter Bags utilize the patented SENTINEL® seal. It's all plastic, polypropylene, polyester or Santoprene® construction, provides a flexible, chemically resistant seal which adapts to any filter housing. This unique design employs a pressure activated sealing lip which responds to increases in differential pressure. As the pressure increases, the seal of the ring improves, insuring by-pass free performance over all ranges of pressure, temperature and micron rating. The elevated bag handles make removal of the bag from the vessel quick and easy. When a SENTINEL® Filter Bag is installed into an Eaton Filtration Housing, the ring snaps into place, holding its position until the housing is closed.
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Static sealing
