Garlock GYLON® 3500 PTFE Gasketing, Silica Filler

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Garlock GYLON® 3500 PTFE Gasketing, Silica Filler
Categories:	Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE)
Material Notes:	PTFE with silica filler. Improved sealing performance over conventional PTFE Unique manufacturing process minimizes cold flow problems typical of skived and expanded PTFE sheets Excellent bolt torque retention Withstands a wide range of chemicals for extended service life Media: Strong acids (except hydrofluoric), Solvents, Hydrocarbons, Water, Steam, Chlorine, Cryogenics Information provided by Garlock Rubber Technologies
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Physical Properties	Metric	English	Comments

Permeability	0.015	0.015	Gas Permeability, cc/min; DIN 3535 Part 4

Mechanical Properties	Metric	English	Comments
Tensile Strength	13.8 MPa	2000 psi	across grain; ASTM F152

Electrical Properties	Metric	English	Comments
Dielectric Strength	14.3 kV/mm @Temperature 121 °C, Time 10800 sec	362 kV/in @Temperature 250 °F, Time 3.00 hour	0.0625 in. thickness; ASTM D149
	2.40 kV/mm @Thickness 1.59 mm	61.0 kV/in @Thickness 0.0625 in	100% RH for 96 hours; ASTM D149

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	260 °C @Pressure 8.27 MPa	500 °F @Pressure 1200 psi	Continuous
Minimum Service Temperature, Air	-268 °C	-450 °F

Descriptive Properties
Color	Fawn
Compressibility, %	7-12		ASTM F36
Creep Relaxation, %	18		ASTM F38
Sealability ASTM F37B, ml/hr	0.22		ASTM Fuel A

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PGARL811 / 157491

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