Technical Data Sheet - Skived PTFE
Basis - Polytetraflouroethylene
General Properties and Applications:
PTFE has excellent resistance to many aggressive chemicals due to its high level
of inertness. It is used extensively on acid plants where strong acids are present.
PTFE can either be supplied in sheet form or cut into gaskets to suit the specific
application.
Dimensions of standard sheets:
Sheet size: Rolls of 1200mm wide
Thickness: 1.5mm and 3mm
| Typical values Chemical reistance Solvents Resistance Limiting Oxygen Index Aging and weatherability Dielectric constant @ 60Hz to 2GHz Friction Coefficient Tensile Strength Specific Gravity Thermal Conductivity Hard ness Compression test Thermal properties |
ASTM D 543 ASTM D 543 ASTM D 2863 - ASTM D 150 ASTM D 1894 - g/cm W/(k.m) Shore Max. allow. Short term load for 2% deformation Melting Point - - |
High Inertness Insoluble under 300°C less than 95 Stable over 20 years exposure 2.1 Static: 0.08 Dynamic: 0.06 30-40 Mpa 2.15- 2.19 0.23 D 50-60 8 N/mm2 - 327°C 260°C -270°C |
Considerations for qasket material selection.
S ize:
Thickness, thinner gaskets are recommended. Gaskets larger than sheets must
be dovetailed.
T emperature:
Peak and continuous. Refer to the PxT chart for recommended, caution and technical
advice values.
A ppllcatlon:
Factors such as safety, accessibility of joint and installation procedures affect
gasket selection.
M edium:
Refer to the chemical reference chart paying particular attention to steam,
oxidizing agents and purging medium.
P ressure:
Operation design and spikes. JMP offers technical assistance on non standard
flange bolting and surface finish.
Technical Data Sheet - Gylon 3500
Basis Re-Engineered PTFE with silica.
General Properties and Applications:
Gylon Fawn 3500 is used for the following media: Strong acids (except hydroflouric),
solvents, hydrocarbons, water, steam, chlorine and cryogenics. Gylon Fawn has
excellent cold flow resistance.
Dimensions of standard sheets:
Sheet size: 1500 x 1500mm (Available in alternative sizes on application)
Thickness: 0.8, 1.5 and 3.0mm (other thicknesses available on request)
Tolerances: Thickness: <1 mm = ± 0.1mm, 1mm = ± 10%
Gylon is able to be welded. Ideal for bigger than sheet gaskets.
| Compressibility Recovery Tensile Strength Gas permeability Sealability Creep Relaxation Maximum operating conditions - - - |
ASTM F36 ASTM F36 ASTM D1708 DIN 3535/4 ASTM F37B ASTM F38 Minimum temperature Continuous max. temperature Temperature with steam Pressure( cont. max) |
7-12% 40% 14 N/mm2 <0.015 cc/mm 0.22 mI/hr 18% -268°C / -450°F 260°C / 500°F 160°C / 320°F 83 bar / 1200 psi |
 |
Technical Data Sheet - Gylon 3545
Basis - Microcellular PTFE.
General Properties and Applications:
Gylon 3545 is a microcellular PTFE material, ie. It has a soft “expanded’
layer top and bottom, ideal for glass, nonmetallic flanges in acid enviroments.
Good cold flow resistance.
Dimensions of standard sheets:
Sheet size: 1500 x 1500mm (Available in alternative sizes on application)
Thickness: 1.5 and 3mm
Tolerances: Thickness: <1 mm = ± 0.1mm, 1mm = ± 10 %
| Compressibility Recovery Tensile Strength Gas permeability Sealability Creep Relaxation Maximum operating conditions - - - |
ASTM F36 ASTM F36 ASTM D1708 DIN 3535/4 ASTM F37B ASTM F38 Minimum temperature Continuous max. temperature Temperature with steam Pressure( cont. max) |
60-70% 15% --—- <0.015 cc/mm 0.15 mI/hr 15% -268°C I -450°F 260°C / 500°F 160 C / 320 F 83 bar /1200 psi |
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