Garlock GYLON® 3565 ENVELON® PTFE Gasketing, Glass Microsphere Filled

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Garlock GYLON® 3565 ENVELON® PTFE Gasketing, Glass Microsphere Filled
Categories:	Polymer; Thermoplastic; Fluoropolymer; Polytetrafluoroethylene (PTFE); Polytetrafluoroethylene (PTFE), Glass Filled, Molded
Material Notes:	PTFE with aluminosilicate microsphere filler. Soft, deformable exterior conforms to surface irregularities; ideal for worn, warped or pitted flanges Stable blue core improves cold flow resistance Low bolt load requirements ensure a tight seal on glass-lined or wavy flanges Direct sintering of GYLON® layers prevents leak paths and adhesive contamination Media: Moderate concentrations of acids and caustics, hydrocarbons, solvents, cryogenics, and glass-lined equipment Information provided by Garlock Rubber Technologies
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Physical Properties	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Tensile Strength	1800 psi	across grain; ASTM F152

Electrical Properties	Original Value	Comments
Dielectric Strength	301 V/mil @Temperature 121 °C, Time 10800 sec	0.0625 in. thickness; ASTM D149
	221 V/mil @Thickness 1.59 mm	100% RH for 96 hours; ASTM D149

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	500 °F @Pressure 8.27 MPa	Continuous
Minimum Service Temperature, Air	-450 °F

Compliance Properties	Original Value	Comments
FDA	Yes

Descriptive Properties
Compressibility, %	35-50	ASTM F36
Creep Relaxation, %	35	ASTM F38
Sealability ASTM F37B, ml/hr	0.33	ASTM Fuel A

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PGARL826 / 157499

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