Nomex Pressboard grades

NOMEX brand pressboard

NOMEX PSB differs from the other NOMEX shapes due to its greater thickness and rigidity. These products offer an attractive range of mechanical properties and thermal protection. Nomex Pressboard is also easy to cut, stamp, fold, print, coat, or bond to other materials.

Nomex® 992 PSB

Nomex® 992 PSB is a low density pressboard produced in two gauges (1,6mm and 3,2mm) with a specific gravity of 0,5. The low density of Nomex® 992 PSB simplifies molding of complex geometries and delivers the highest saturability of Nomex® pressboard products.

One of the common applications for Nomex® 992 PSB is in transformer core tubes.

Nomex® 993 PSB

Nomex® 993 PSB is a medium density pressboard produced in gauges from 1,0 mm (40 mil) to 4,0 mm (160 mil) with a specific gravity of 0,7 to 0,9. Nomex® 993 PSB delivers a balance of stability and ductility, outstanding saturability and excellent in-oil properties.

Nomex® 993 PSB is excellent for liquid immersed transformer applications where a larger molded part is required, e.g. B. shroud rings, dielectric barriers or core tubes in larger transformer designs.

Nomex® 994 PSB

Nomex® 994 PSB is a high density pressboard produced in gauges from 1,0 mm (40 mil) to 9,6 mm (380 mil) with a specific gravity of 1,1 to 1,2. Nomex® 994 PSB provides outstanding stability under compressive loads. The excellent resilience helps ensure that the coil structures remain taut and can withstand short circuit forces - even after years of use.

It absorbs oil and other liquids, but not as readily as Nomex® 992 PSB and Nomex® 993 PSB.

Nomex® 994 PSB is typically used for spacers and other structural components in liquid immersed transformers.