GYLON^® Style 3565 ENVELON^® Gasketing

• Tight seal
• Soft, durable 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
• Easy to install
• Custom-cut gaskets from large sheets offer convenience while reducing costly inventory buildup
• Ideal replacement for slit, milled, formed shield, and double jacketed envelope gaskets* which are prone to foldover during installation
• Will not support flame
• Will not support bacterial growth

*When sealing uneven flanges, gasket must be four times thicker than maximum gap between flanges.

• Available in sheet or cut gasket form
• White exterior and blue interior
• PTFE with Aluminosilicate microspheres
• Min. Temperature:        -450°F      /       -268°C
• Max. Temperature:     500°F         /    260°C
• Max. Pressure:        1200 PSI        /    55 bar
• Maximum PxT 1/16:    350,000 °F x PSIG     /    12,000 bar x °C

• Bolt Circle Diameter (Inch)	3.500
  Bolt Circle Diameter (mm)	88.90
  Bolt Hole Diameter (Inch)	0.750
  Bolt Hole Diameter (mm)	19.05
  Bolt Hole Quantity	4
  Branding	Branded
  Color	White
  Compliances	FDA Compliant, REACH Compliant, RoHS Compliant
  Composition	PTFE with Aluminosilicate Microspheres
  Flange Standards/Pressure Class	ASME B16.5 Class 300
  Gasket Type	Full Face
  Inside Diameter (Inch)	1.313
  Inside Diameter (mm)	33.35
  Min Temperature (C)	-268
  Min Temperature (F)	-450
  Nominal Pipe Size (inch)	1.000
  Nominal Pipe Size DN (mm)	25.0
  Nominal Pipe Size Fraction (Inch)	1
  Outside Diameter (inch)	4.875
  Outside Diameter (mm)	123.83
  Pipe Standard and Class	ASME B16.5 Class 300
  Pressure Class	300
  Pressure Max (bar)	55
  Pressure Max (psi)	1200
  Primary Dimensional Unit of Measure	Imperial
  Primary Nominal Thickness	1/16 in
  Rubber Material	PTFE
  Rubber Material Abbreviation	PTFE
  Standard/Special	Standard
  Style/Model	Style 3565
  Temperature Range (C)	-268°C to 260°C
  Temperature Range (F)	-450°F to 500°F
  Thickness (inch)	0.063
  Thickness (mm)	1.60

• Hydrocarbons
• Solvents
• Moderate concentrations of acids and caustics
• Cryogenics
• Glass-lined Equipment
• Hydrogen peroxide
• Refrigerants