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Packing made of expanded graphite yarns reinforced with Inconel wires and coated with a graphite-based mix. LATTYgraf 6940 contains a sacrificial anode to protect the valve stem and the stuffing box.
This special structure withstands high pressures without graphite extrusion.
High-performance valves.
Thermal oils and all high-temperature fluids, power stations, refineries, boiler plants, etc.
Limitation: precautions in oxydising environment.
Approval: BAM (oxygen), amended fire test API 607.
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Properties:
Design ==> Sealing ring
Min. temperature - 250 °C Max. temperature + 300 °C
Material ==> Copper
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O-Rings made with Parofluor Series materials provide both static and dynamic sealing solutions for hydraulic, pneumatic, vacuum and other applications. These o-rings are available in AS568B inch sizes, as well as a wide range of metric and JIS sizes. Large diameter molded o-rings and non-standard sizes are also available.
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Rings & Bushing
Manufacturing a customized seal ring in link with specifications, and machining it to the required degree of flatness are not major engineering challenges. The problem is that the ring must remain flat to function regardless of application and environment. Wear resistance, toughness, corrosion resistance, and resistance to thermal shocks are the key material properties required for long-lasting, all-perfect pump function.
The unique combination of all these material characteristics has made cemented carbide the most widely used material in pump seals and bearing in the sewage, mining and process sectors. Moreover, there is further potential to tailor cemented carbide for a vast range of environment applications.
Cemented carbide can be made harder than the hardest steel, but yet remain tougher then ceramics.
Sandvik grades offer a complete set of properties
- Excellent hardness / toughness compromise guarantees outstanding wear, erosion and shock resistance.
- Robust surfaces
- Low friction coefficient and high mechanical strength.
- High thermal conductivity and superior thermal resistance.
- Resistant to handling and easy to assemble
- Sandvik grades support brazing, mechanical assembling, shrink fitting, press fitting and gluing.
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Extruded and jointed "O" rings are our preferred method of production, but moulded versions are available if specifically requested.
Both silicone & fluorosilicone with all varieties of fillers are available for the manufacture of "O" rings.
The advantages of vulcanised "O" rings are:
- Cost Effective
- No tooling costs
- Reduced lead times
- Better surface finish (zero flash)
- Allows hollow sections to be used for lower compression force
-Custom lengths easily produced (up to approx 2m developed length)
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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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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 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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- 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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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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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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Carpenter Powder Products (CPP) is one of the world’s largest suppliers of gas atomized powders. Micro-Melt® powder metal alloys offer a homogenous, fine and super clean microstructure. Benefits:
* Corrosion, wear, and temperature resistance
* Improved Heat treating, machining, or grinding of tool steels
* Waste minimization
* Increased product life
Our products include spherical gas atomized powders produced via air, vacuum, or pressurized melting with Argon or Nitrogen Atomization in fine, medium and coarse powder distributions. These include both loose and consolidated iron, cobalt, and nickel-based alloys, and stainless and tool steels. We also produce cast-wrought tool and die steels.
We welcome the opportunity to develop specialty products, custom solutions and other required support to help reduce the life-cycle cost of your products. For detailed product information, please visit the Product Literature page.
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CoorsTek offers a wide variety of long-life, heat-stable, and corrosion-resistant ceramic hard-face seals using high-grade aluminas, silicon carbide, tungsten carbide, carbon graphite, and specialty polymers.
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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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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
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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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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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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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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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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General Information
HTMS Metal- C-Ring seals are made from high temperature alloy strip. The strip is cut to the required length and tig welded. The C-shape is then formed in a tool or is roll formed for bigger sizes. HTMS Metal C Rings are a logical development over our popular Metal O Ring. Metal C Rings have a better spring back then same size Metal O Rings. The seating load or the required bolting force is lower than for similar sized Metal O Rings. HTMS Metal C Rings will compensate greater flange rotation and maintain positive sealing load, better than Metal O Rings.
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.
For extreme low leakage requirements at elevated temperatures HTMS also produces spring energized metal C Rings. This “CS” design is basically a metal C Ring with an inserted high tensile spring.
Metal C 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 C Rings capability
- Temperatures from cryogenic (- 270°C) up to high temperatures (+ 900°C)
- Ultra hard vacuum and pressures op to +300Mpa
- High pressure capability
- Lowest leak rate
- Radiation resistant
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