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James Walker® Gaskets & Jointings > Cork-elastomer jointings

  Cork-elastomer jointings
Nebar® Purple: Nitrile Electrical
High quality, medium-to-hard grade of cork-elastomer jointing based on nitrile elastomer. Replacement material for Nebar N67.

• Robust grade for heavy electrical duties.
• More resistant to over-compression than normal cork-elastomer grades.
• Resists all commonly used transformer fluids.
• 110°C maximum recommended operating temperature in liquids; tolerates intermittent excursions to 120°C.
• Retains flexibility down to –25°C.
Complies with ASTM F104 line call out F224000M2.
PHYSICALPROPERTIES (Tested to ASTM F104 procedures)
Hardness, IRHD 60 to 80 (ASTM D1415)
Tensile strength, MPa min 1.75 (ASTM F152)
Compressibility @ 2.8N/mm2, % 15 to 25 (ASTM F36)
Recovery, minimum % 75 (ASTM F36)
Fluid resistance, % volume swells in:
ASTM oil 1, 72h @ 100°C –5 to +15 (ASTM F146)
IRM903, 72h @ 100°C +5 to +20 (ASTM F146)
Fuel A, 22h @ ambient +5 to +15 (ASTM F146)
BS148 Transformer Oil, 14 days @ 90°C +1 (ASTM F146)
Precision cut gaskets to any shape, size and quantity. In sheets 1.2m x 0.9m for thicknesses 1.5mm, 3mm, 4mm, 5mm, 6mm, 6.4mm. Sheets 1.27m x 1.014m for thicknesses 1.5mm, 5mm.