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James Walker® Gaskets & Jointings > Cork-elastomer jointings



  Cork-elastomer jointings
Nebar® Black: Hi-Performance Electrical
 
DESCRIPTION
Cork-elastomer jointing based on nitrile/polychloroprene blend. Previously designated Nebar® C947/3.

PRIME FEATURES
• Specifically for hydrogen coolers or where SF6 gas is present.
• 1010ohm.cm electrical resistance at 100Vdc.
• 110°C maximum operating temperature in liquids.
• Retains flexibility down to –15°C.
 
SPECIFICATION
Complies with ASTM F104 line call out F224000M2.
 
PHYSICAL PROPERTIES
(Tested to ASTM F104 procedures)
Hardness, IRHD 65 to 80 (ASTM D1415)
Tensile strength, MPa min 2.45 (ASTM F152)
Compressibility @ 2.8N/mm2, % 15 to 25 (ASTM F36)
Recovery, minimum % 85 (ASTM F36)
 
Fluid resistance, % volume swell in:
ASTM oil 1, 72h @ 100°C –2.7 (ASTM F146)
IRM903, 72h @ 100°C +10.7 (ASTM F146)
Fuel A, 22h @ ambient +1.0 (ASTM F146)
BS148 Transformer Oil, 14 days @ 90°C +1.2 (ASTM F146)
 
HOW SUPPLIED
Precision cut gaskets to any shape, size and quantity. In sheets 1.2m x 1.0m
for 2.5mm thickness; 1.8m x 1m for 3mm thickness; 1.2m x 1.2m for 5mm
thickness.