Chesterton 3500 Valvelon
Sealant Ideal for Valve Packing and Flange Gaskets
A unique, multi-layered, 100% PTFE packing/sealant. Chesterton 3500's anti-extrusion construction conforms to surface shapes, withstands a wide range of temperatures, and seals virtually all chemicals. Ideal for valve packing and flange gaskets.
CAUTION: Do not use on liquid or gaseous oxygen, molten alkalimetals, and some rare halogenated compounds.
Chemically-inert, pH 0-14
Wide temperature range –240oC to 260oC
High tensile strength
NSF registered P1
Self-adhesive Pure Flexible Graphite Tape
Flexible graphite tape is cut from expanded graphite roll which offer excellent sealing capabilities under extreme conditions. The Graphite tapes have no impregnates, binders, additives, oils or greases.
The Tapes can be supplied either plain or corrugated and both can be adhesive backed.
Carbon Content 99%
Leachable Chloride ASTM D-512 50ppm Max.
Sulphur Content ASTM C-816 1000ppm Max.
Non-Oxidizing: -200oC to +3300oC.
Oxidizing: -200oC to +500oC.
Steam: -200oC to +650oC.
PTFE self-adhesive tape
Products consist of virginal, expanded PTFE. Ahighly fbrillated structure gives them their special properties.Product line includes sheets and joint sealants.
Technical data (typical values for sheets in thickness 2 mm)
Temperature range −240oC to +260oC
pH range 0 - 14
Density DIN 28090-2 0.9 g/cm3
Compressibility ASTM F36/J 65 %
Recovery ASTM F36/J 12 %
Stress resistance (16h, 30MPa, 150°C) DIN 52913 16 MPa
Permeability to nitrogen DIN 3535/6 0.002 mg/sm