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Gaskets and Sheet Jointings

Nebar® Grey

Description
Premium quality, medium hardness cork-elastomer jointing, based on nitrile rubber, that meets ABB specification for transformers and switchgear.

Previously designated Nebar® N80.

Recommended maximum system pressure is 0.5Mpa/5bar. May be used for higher pressures in consultation with James Walker Technical Support Team.

Prime features

  • Suitable for a wide range of duties.
  • Used extensively in automotive, engineering and electrical industries.
  • +110°C maximum operating temperature in liquids.
  • Retains flexibility down to -25°C.

Specifications

  • Meets ABB specifications for transformers and switchgear.
  • Complies with ASTM F104 line call out F225000M2.

Fluid compatibilities
Suitable for use with air, water, alcohols, fuel and diesel oils, mineral and synthetic lubricating oils, mineral hydraulic fluids, water/glycol, ASTM Oil No 1, IRM903 oil, ASTM Fuel A, BS 148 Transformer Oil.

Physical properties
(Tested to ASTM F104 procedures)
Hardness, IRHD  70 to 75  (ASTM D1415)
Tensile strength, MPa minimum:  1.75   (ASTM F152B)
Compressibility @ 2.8N/mm², %:  20 to 30  (ASTM F36B)
Recovery, minimum %:  80  (ASTM F36B)
Fluid resistance, % volume change in:
ASTM Oil No 1, 72h @ 100°C:  -2 to +10  (ASTM F146)
IRM903, 72h @ 100°C:  -2 to +15  (ASTM F146)
ASTM Fuel A, 22h @ ambient:  -2 to +10  (ASTM F146)
BS 148 Transformer Oil, 14 days @ 90°C:  +2.4  (ASTM F146)
Dow Corning 561 Transformer Fluid:  -5  (Non-ASTM test)

How supplied
Precision cut gaskets to any shape, size and quantity. In sheets 1.2m x 0.9m. Thicknesses 1.5mm, 3mm, 5mm, 6mm.

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