The Garlock GYLON 3565 ENVELON is an aluminosilicate microsphere-filled PTFE gasket, engineered with a compressible exterior and a rigid core, designed for severe and non-rigid flange applications.
Our Quebec facility manufactures custom-cut flat gaskets to your exact specifications. VAMECA can also evaluate the supply of this part number or engineer a suitable replacement.
AT A GLANCE
Filled / Restructured PTFE
Product Family
PTFE
Material Composition
Aluminosilicate microspheres
Maximum temperature and pressure limits cannot be applied simultaneously.
TEMPERATURE
Min. -268 °C · Continuous 260 °C
PRESSURE
55 bar (catalogue maximum, verify according to P/T rating)
THICKNESSES
Thickness specifications not available in source documentation
Applications and Key Features
The manufacturer recommends it for glass-lined, warped, pitted, or irregular flanges, as well as low-bolt-load assemblies.
Published Testing and Approvals
Standards, Testing, and Certification References
Standards / Testing: ASTM F36, ASTM F38
PART NUMBER ANALYSIS
KEY COMPARISON CRITERIA
ENVELON differs from a standard PTFE envelope gasket and homogeneous GYLON 3504 filled with microspheres. Its multi-layered architecture is what sets it apart.
Need this gasket, custom cutting, or a replacement?
Part Number: Garlock GYLON 3565
Please provide the part number, thickness, dimensions, quantity, and process fluid. We will review material availability for the specified grade, custom cutting at our Quebec facility, or an engineered alternative tailored to your assembly.
The manufacturer's latest datasheets, certifications, and P/T curves must be reviewed prior to ordering or substitution.
Compressible PTFE constructions engineered for irregular flanges. Layering and bonding methods vary by design. Associated reference constructions include: GYLON 3545 (microcellular PTFE with a rigid core), GYLON 3540 (microcellular PTFE), and Flexitallic SIGMA 588 (pure expanded PTFE).
REFERENCE SHEET
Flexitallic
Unfilled PTFE with a multilayer cellular structure, featuring layers bonded through direct sintering