Soft Gaskets

PTFE Gaskets Details

PTFE Gaskets
  • PTFE is extremely useful as a gasket material, thanks to its almost chemically inert nature
  • Unfortunately, the material has a tendency to creep under load and has limited use in such applications
  • Modified PTFE materials allow the benefits of PTFE to be utilised at higher compressive loads and temperatures
  • For instance, expanding the PTFE produces a softer material with a higher strength
  • The addition of fillers such as silica, silicon carbide or barium sulphate lends the material better hot and cold flow resistance. Hence, the chemical resistance is not negatively affected
  • PTFE can also be used as an envelope instead of a more conventional compressed fibre gasket material insert
  • This combines the chemical resistance of the PTFE with the stress retention and recovery properties of the insert
  • The result? The negative effect of the PTFE on the joint’s mechanical stability is reduced
Specifications
  • Remarkable chemical resistance
  • Suitable for use with foodstuff and pharmaceutical applications
  • Insoluble in solvents, even at increased temperature
  • Stable to light
  • Does not absorb water
  • Excellent electrical insulating capacity
  • Low thermal conductivity
Expanded PTFE
  • Expanded PTFE materials has excellent creep resistance and bolt torque retention properties
  • This allows PTFE to be used at higher temperatures and to seal higher internal pressures
  • Expanded PTFE tape form with a pressure sensitive adhesive backing strip to assist with installation
  • Since the material is available in roll form it offers a solution to jointing needs without the need to maintain large stocks of cut gaskets
Expanded PTFE Properties
  • Combination rings or transition rings combine two different sizes having the same pitch diameter permitting bolt up of differing size flanges
PTFE Envelope with Compressed Fibre Insert Properties
  • Excellent chemical resistance
  • PTFE envelope gaskets comprise a compressed synthetic fibre gasket material insert with a PTFE envelope
  • The envelope protects the gasket from chemical attacks and provides required strength and resilience for demanding sealing operations
  • PTFE envelope gaskets offer excellent chemical resistance under moderate conditions of temperature and pressure
Non-asbestos Gaskets
  • Non-asbestos Gaskets is made of high quality non-asbestos fabric and synthetic rubber
  • Non-asbestos Gaskets sealing ability is exceptional and safe against oil
  • Suitable alternative for asbestos
Rubber Gaskets Details
Nitrile (NBR) Rubber Properties
  • Universal, oil resistant rubber
  • High-quality general-purpose nitrile sheet
  • Recommended for added resistance to mineral oil, alcohol and petroleum products especially under hot conditions
  • Avoid using under sunlight or near sparking electrical apparatus
Neoprene Rubber Properties
  • High-quality general-purpose poly-chloroprene sheet
  • Recommended for using in less demanding situations like air, water, non-oxidising acid and aliphatic hydrocarbons
  • Recommended for using in less demanding situations like air, water, non-oxidising acid and aliphatic hydrocarbons
  • Ideal for situations where extra resistance to heat, ozone or weathering is required
SBR Rubber Properties
  • General purpose, synthetic equivalent to natural rubber
  • Offers similar mechanical properties but better high temperature performance, flexibility, and a greater resistance to attack from animal and vegetable oils
EPDM Rubber Properties
  • Excellent mechanical properties
  • Resistant to ageing, weathering, ozone, oxygen, steam, and water
  • Recommended for using in conditions where resistance to sunlight, weather, steam, and ozone attack is required
  • Can be used with phosphate ester-based hydraulic fluids and numerous mineral acids
  • Not suitable for petroleum based oils or fluids
Viton Rubber Properties
  • High temperature rubber material with resistance to a wide range of chemicals
  • High quality fluorocarbon rubber, exhibiting a wide range of chemical resistance
  • Extremely-resistant to the effects of oxygen and ozone
  • Retains excellent mechanical properties even when subjected to high temperatures for longer periods
Butyl Rubber Properties
  • Resistant to phosphate ester based hydraulic fluids and mineral oils
  • Highly-impermeable to gas and moisture but is not recommended for petroleum oils and fluids
  • Good resistance to phosphate ester based hydraulic fluids and mineral oils
  • Highly impermeable to gas and moisture and has good general chemical resistance including mineral acids
  • Resistance to petroleum oils and fuels is low
Natural Rubber Properties
  • Excellent general purpose poly-chloroprene sheet
  • Recommended for use in less demanding situations with air, water, non-oxidising acid and aliphatic hydrocarbons
  • Offers extra-resistance to heat, ozone or weathering
  • Medium quality commercial grade, exhibiting the qualities required for a good gasket
  • Suitable for gaskets and packing where no high resistance to heat, oils, or solvents is required
  • Ideal for cold water, sewage pipes, etc.
Silicone Rubber Properties
  • High-quality silicone rubber with excellent resistance to temperature extremes
  • Good weathering properties
  • Can be used in contact with food stuffs
  • White silicone rubber is also available
Compressed Non-Asbestos Fibre Details
General Properties of CNAF
  • Capable of sealing a wide range of industrial applications
  • Easy to handle and install
  • Excellent bolt stress retention properties
  • Remarkable sealing performance
  • Easy to remove due to CNAF’s proprietary anti-stick coating
  • Economical
Aramid Fibre with NBR Binder Properties
  • Good resistance to oils, fuels, hydrocarbons
  • Successful in internal combustion engine applications
  • Available in sheet form as cut gaskets
  • 3xA anti-stick finish on both sides
Aramid & Glass Fibre with NBR Binder Properties
  • Good resistance to oils, fuels, hydrocarbons
  • Fantastic economical option for general industrial services
  • Available in sheet form and as cut gaskets
  • 3xA anti-stick finish on both sides
Aramid Fibre with SBR/NR Binder Properties
  • Premium grade, controlled-swell materials
  • Available in sheet form and as cut gaskets
  • 3xA anti-stick finish on both sides
Synthetic Fibre NBR Binder Properties
  • Excellent seal-ability even at low bolt loads
  • Economical
  • Good resistance to oils, fuels, hydrocarbons, and water, etc.
  • Excellent gas leakage properties
  • Available in sheet form and as cut gaskets
  • 3xA anti-stick finish on both sides
Reinforced Graphite Gaskets
ReinforCedGraphite Gasket Reinforcements
Product Details
ReinforCed Graphite Gaskets
  • Wide-spread sealing products
  • Consists of pure carbon in which the crystalline structure has been considerably expanded through special chemical and thermal procedure
  • The expanded crystals are formed into foil by a multi-stage calendaring process
  • Thin flexible graphite foil can then be laminated into thicker sheets to manufacture a range of sealing products
  • Flexible graphite sheet can also be supplied with reinforcing materials to increase the tensile strength, load bearing capacity, and improve handling characteristics
  • Laminated graphite sheet materials are often used as a replacement for asbestos-based materials. Because of their excellent chemical resistance and temperature
  • Graphite laminate materials are ideal for steam applications as they do not contain a rubber binder and are not subjected to hardening of the material
Specifications
  • Outstanding resistance to high and low temperature
  • Chemically resistant to virtually all media
  • High compressibility
  • Low creep under temperature or pressure
  • Seals gases and liquids effectively at low bolt loadings
  • Unlimited storage life