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Braided packings
Yarns, ribbons and other
materials are processed by combining strands in a variety of
configurations, chosen to provide specific performance requirements.
Resulting packings will have various cross sections, dependent upon the
braiding method used.
Braided
packings |
Aramid fibres have
excellent thermal stability, suitable for high temperature sealing
applications.
Para-aramid fibres are yellow, with high strength and rigidity, well
suited for high pressure sealing applications. They have wide chemical
compatibility and a pH range of 3 - 11.
Meta-aramid fibres are white, with high chemical and hydrolytic
resistance, plus a wide pH range of 1 - 13.
Aramid fibres |
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Polytetrafluoroethylene fibres have extremely high chemical resistance,
with a pH range of 1 - 14, offering outstanding performance in highly
corrosive environments. In addition, PTFE fibres have exceptionally low
levels of friction and adhesion, so providing self-lubrication.
PTFE fibres |
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A wide selection of
polymeric fibres may be used in compression packings, providing a
range of properties and performance envelopes to suit many applications.
Other polymeric
fibres |
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Amorphous carbon
fibres have a nominal carbon content ranging up to 99.8%. These fibres
are non-abrasive, self-lubricating and have a low modulus of elasticity.
Carbon fibres have high thermal and electrical conductivity, plus good
chemical resistance to all but oxidising media.
Carbon fibres |
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Flexible graphite
ribbon (tape) has a nominal carbon content of at least 99%, plus a
low coefficient of friction.
It is chemically inert to all but oxidising media, with a wide pH range
of 0 - 14.
Flexible graphite
ribbon |
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Glass fibres
have good thermal resistance, dimensional stability and tensile
strength, dependent upon the formulation.
Glass fibres |
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Vegetable
fibres are natural materials which provide the most economical sealing
solution.
Vegetable fibres |
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Metal wire
braided packings provide high tensile strength to high temperatures,
together with good thermal and electrical conductivity. Used generally
as a support in combination with other fibres.
Metal wire |
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Die-formed rings
A pre-compressed ring form in which various packing materials can be
supplied, with controlled density and size.
Die-formed
rings |
Flexible graphite
can be molded and compressed into die-formed rings, which have a
low coefficient of friction.
It is chemically inert to all but oxidising media, with a wide pH range
of 0 - 14.
Flexible graphite |
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Micaceous
die-formed rings are produced from natural mineral material,
providing packing rings which have extremely high thermal stability.
Micaceous |
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Extruded packings
A homogenous mixture which is extruded to provide the desired cross
section, with a variety of densities and degrees of compressibility.
Extruded packings |
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Injectable packings
Blends of various fibres with greases and other lubricants which are
pressure-injected into the gland housing. The housing should contain
end-rings of conventional packing to retain the sealing compound.
Injectable packings |
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Metal
foil packings
Consist of various metal foils with oils and dry lubricants which are
twisted, folded and/or wrapped, usually over a core of yarns. These form
dense, strong packings which are deformable yet resilient.
Metal foil packings |
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Hybrid
/ combination sets
Special combinations of a variety of packings technologies to provide
specific application performance.
Hybrid / combination sets |
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