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Resilient Metal Seals
Metal-to-metal seals: the innovative route in static sealing
Process developments over the past thirty years, demanding ultra high vacuum, high temperatures and pressures, have driven the need for advanced technology seals. Michel Le François, Research and Development Manager of Sealing Technology business Garlock, explains how metal-to-metal gaskets have evolved to comply with the most demanding requirements.
HELICOFLEX
Metal C-Rings
Metal E-Rings
Metal O-Rings
OMICRON
ULTRAFLEX
ULTRASEAL
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Metal Seals/Resilient Metal Seals are designed for applications that require temperature and chemical resistance beyond that of even Parofluor Series elastomers. These seals are offered in many cross-sections, including "C," "U," "E," and "V," with spring-energized variations.
Parker S-Shape and Omega Metal Seals are high performance, resilient metal seals intended for separable joint type applications requiring
resistance to temperature and pressure extremes, resistance to corrosive fluids, zero leakage and exceptionally long life.
The Parker S-Shape Metal Seal features low seating load, high resilience. They are self energizing and pressure assisted. Parker S-Shape Metal Seals are reusable and require a very simple cavity design.
The high strength base metal "spring" is coated with a softer sealing material. When compressed between flat surfaces, the spring seal forces the soft coating material into the mating surface roughness, blocking all potential leak paths. Once initiated, the intimate contact is maintained by the seal's resilience, overcoming the effects of temperature, pressure, flange separation and reduction of bolt torque.
The Parker O-Seal Division also produces two additional types of resilient metal seals for use in super-critical sealing of nuclear, aerospace and aircraft engine applications. Both the Parker Mark I and Mark II Metal Seals are available in a wide range of base metals and surface coatings from PTFE to gold plating. For "zero leakage" applications, the Parker Mark I is
recommended and is available in either internal or external pressure versions, depending upon customer requirements.
The cavity for a Parker SShape Metal Seal must provide controlled squeeze, seal location, adequate sealing surface and structural support.
Parker S-Shape Metal Seals are recommended for use in applications beyond the limits of elastomeric O-ring seals. Typical applications for the Parker S-Seal include jet engine fuel and exhaust seals, nuclear couplings, cryogenics, bakeable vacuu hardware, steam systems, turbine engines, cylinder heads and plastics processing equipment. For complete information on available sizes, metals, coatings and dimensional requirements for S-Seal glands, contact the Parker O-Seal Division Technical Services Department at 310
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Rubber Gaskets (Flat seals) in different dimensions.
For further informations, visit our catalogue.
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- Extensive assortment
- Combination on foam tapes and PVC
- EMI/RFI shielding gasket
- Window Seals
- Buffers
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- Seal between casing and multi-function manifold
- Noxious gas regulation valve for blow-by environments
- Single or multi-passage seal for ensuring leak tightness in a plastic or metallic groove
- Clipped gasket to ensure tightness between the cylinder head and the cylinder head cover.
- Multi-use sealing to prevent circulation of a fluid
- Connection tube between two casings / plates for passage of fluid under pressure and high flowrate.
- Static seal cover between the torque converter and the gearbox
- Transfer part for oil circulation between a control box and a gearbox.
- Piston with sealing lip for automatic gearboxes
- Disk brake piston dust cover
- Tube cap seal for fuel tank flap.
- Micro-precision seal for explosive applications (airbags, etc.)
- Dynamic and acoustic sealing for windshield wiper devices.
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Rubber products and trim
Normont supplies a full-line of rubber and trim products. From self-sealing weatherstips to aluminum and metal core Quickedge® protective trims to self-gripping rubber gaskets, Normont has a cutting-edge assortment of these products.
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Valves and jointsInfo-Catalogue
Control and regulation of liquid.
Orobica Plast-Gom produces gaskets for butterfly valves, joints according to DIN - ISO - CLAMP - S.M.S. - BS - IDF standards for alimentary, pharmaceutical and chemical industries.
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TRP Polymer Solutions’ product portfolio is diverse. Its polymer technologists have considerable experience developing bespoke engineered precision rubber moulded components for a wide variety of industries.
This section of the website outlines some of TRP Polymer Solutions’ product developments and materials. To discuss your requirements in relation to these or any other area, please get in touch.
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The material combines the sealing force, heat resistance and recovery characteristics of an elastomer with a chemical resistance similar to that of PTFE. As a result, TRPlast FFKM seals outperform alternative elastomers.
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Sealing rings of reinforced moulded graphite are solving problems on Bridgeman-type valves widely used in power generation...
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Precision Ground Rollers
Precision ground rollers are vital components in applications including paper transportation, mail sorting and ATM machines.
TRP Polymer Solutions offers expertise and experience in the development of precision ground rollers for a wide range of industries. Its polymer technologists can work with your engineers to develop or refine a roller to your bespoke requirements.
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Sealant tapes compatible with most bagging films.
Ideal for use on all type of tools.
Sealant tapes are used to from a seal between the vacuum bagging film and the moulding tool surface.
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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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VITOSEAL multi-purpose vinyl foam sealing tapes - ensure permanent air- and water-tightness, sound absorption, heat and cold insulation
VITOSEAL consists of an one-side self-adhesive vinyl foam with a paramount resistance to ageing and weathering conditions.
The flexible and elastic consistency of these products permits an easy adaptation of uneven surfaces, allowing thus an optimal sealing.
The water-tightness is already achieved at a compression of about 30 %. VITOSEAL vinyl foam tapes show an elevated vapour diffusion tightness. In general, they are resistant to water, fungal attacks and oxidation; in addition, they are resistant to diluted acids and weak alkaline solutions in commercially available brands with normal concentration.
These tapes should not be applied in direct contact with plexiglass. When entering into contact with plexiglass, it is advisable to change over to other foams.
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Scotch® Printed Box Sealing Tape
To deter tamper and counterfeiting, choose from a variety of 3M films, adhesives, colors, and constructions with pre-printed messages that make every package a communications medium. For security and to deter unwanted access to the package, tampering is evident at a glance when printing on the tape is broken or misaligned.
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Round cords
Profiles
Profiles foamed
Adhesive and sealing tapes
Rotational, stroke and profile seals
Our extensive range spans the spectrum from seals for rotational and linear movements to diaphragms, packings and dirt scrapers. Special profile seals can also be produced according to customers’ specifications.
Sealing elements for hydraulic and pneumatic systems
Our range includes lip seals, V-packings, composite seals, scrapers, diaphragms and special seals moulded for specific customers’ requirements.
Pre-formed elastomeric sections
Our standard range of pre-formed sections can be supplemented by customers specific designs if required.
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SikaLastomer® and SikaDamp® are products of sealing non reactive to base polyisobutylene. These products have a permanent plastic behavior.
Benefits major:
Good grip on many media without preparation of surface.
Excellent resistance to moisture Protection effective against corrosion Application simple and quick
The butyles are also excellent acoustic properties of depreciation. The SikaDamp®, patches butyles strengthened or not by a film aluminum, have been specially designed for this type of applications.
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The products in this series are industrial-use adhesives whose major components are solvent-based synthetic rubber and nonsolvent-based, moisture-curing special polymer. The products have strong initial adhesion and do not lose elasticity after bonding.
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Water-tight joint constructions with attachable elastomeric profile. Robust and age-proof elastomeric quality that in combination with the stable edge profile provides an excellent drive-over comfort in cold temperatures.
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Available in many different clamping sizes, colours and cross-sections this product line is extremely versatile with respect to its possible applications which include covering and protecting sharp metalwork edges in:
Spare tyre and radio compartment cut-outs in passenger cars
Compartment flaps in buses, caravans and special vehicles
Securing the edges of control panels and windows in large-scale machines
Trimming the edges of motor-cycle crash helmets
Cable and wiring protection underneath vehicles to prevent chafing
Vehicle seating framework
Cut-outs in waste-paper bins
Sealing sections are indispensable in the vehicle industry for keeping out draughts and rain and also in general industrial applications for keeping dust, dirt and humidity out of sensitive equipment. GHE offers a wide range of clip-on sections with bonded seals which are ideal for door and window frames and for flaps of all kinds.
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Typical Profiles
Closed-cell sponge and solid polymer extrusions are available in continuous lengths, intricate profile shapes and a variety of colors. See Lauren's user-friendly spec sheet of standard compounds. Compound seals and gaskets made specifically from silicone, EPDM, Fluoroelastomer and Clip-on seals.
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Insulating silicones:
Insulating GT
Silicones
Insulating GT
Fluorosilicones
Insulating
Cellular
Silicone foam
Aeronautic
quality
elastomer
Industrial
quality
elastomer
Silicone shock
absorber
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Seal Science has been supporting the medical and medical device industries for many years providing clean room produced silicone liquid injection molded (LIM) seals and components. Through the incorporation of design engineering, materials science, and precision manufacturing, Seal Science offers customers complete application solutions ranging from product development to value engineering.
Through testing and development, SSI provides LSR materials closely matching material physical properties of traditional transfer and compression molded products. SSI also provides LSR seals and components in both clear and pigmented materials.
Silicone LIM molding provides customers with ultra-clean, high tolerance sealing products in high production at very competitive costing.
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Depending upon type FIXED O FLEX is applicable as sealing material in mechanically particularly strongly burdening joints, e.g. industrial plants, lanes etc. Due to its high chemical resistance FIXED O FLEX is particularly suitable for chemically loaded ranges.
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MAPESIL LM : Single-component, neutral cross-linking, low modulus silicone sealant for movement joints with maximum 25% expansion of the initial size. Flexible sealing of interior and exterior expansion joints in ceramic wall tiling as well as for windows, mirrors, metals, PVC, polycarbonate etc., both intermediate and for sealing to wood, concrete, etc. Highly suitable for flexible sealing of external façades particularly those covered with limestone sensitive-to-acids. Does not stain. Unsuitable for continuous water immersion. Consumption depending on the size of the joint.
MAPESIL Z : Universal acetic-cross-linking silicone sealant. Mapesil Z is formulated for use as a sealant and for forming perfectly elastic gaskets between various elements used in construction, mechanical engineering, ship-building, automobile manufacturing, and other industries. Mapesil Z is a silicone sealant with acetic cross-linking in a thixotropic paste easily applied horizontally or vertically. Mapesil Z cross-links at ambient temperatures, forming an elastic material. When applied on concrete or wood, first apply Primer FD. Colours: clear, white, gray. Consumption calculated according to the volume of the joint and the density of the sealant (1.00 g/cm3 for clear and 1.24 g/cm3 for coloured compounds).
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Static sealing
