Product Enquiry

Gaskets and Sheet Jointings

Nebar® White

Description
Premium quality cork-elastomer jointing, based predominantly on polychoroprene. Well proven over many years in heavy electrical plant.

Previously designated Nebar® N6/25.

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

Prime features

  • Top grade product for switchgear and transformers.
  • Developed for prolonged contact with mineral oils.
  • +105°C maximum operating temperature in liquids.
  • Retains flexibility down to -30°C.

Specifications
Complies with ASTM F104 line call out F225000M2.

Fluid compatibilities
Suitable for use with air, water, alcohols, fuel and diesel oils, mineral 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:  65 to 85  (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 :  -5 to +10  (ASTM F146)
IRM903, 72h @ 100°C:  +10 to +30  (ASTM F146)
ASTM Fuel A, 22h @ ambient:  0 to +15  (ASTM F146)
BS 148 Transformer Oil, 14 days @ 90°C:  +10  (ASTM F146)

How supplied
Precision cut gaskets to any shape, size and quantity. In sheets 1.2m x 1.2m. Thicknesses 0.75mm, 1.5mm, 2mm, 3mm, 4mm, 5mm, 6mm, 6.4mm, 8mm, 9.5mm.

Back to top