Specifications: PSA

PSA (MOB PF2 PS/SPU)

This is still the most widely used and is generally acknowledged to be the more comprehensive. Because the PSA specification is performance-based, product conformity can be independently tested, which makes compliance clear and unambiguous.

This standard also gives definitive advice on which grade to use for specific applications, which is a far more user-friendly approach than the BSEN, which simply defines performance attributes.

The PSA comprises just four classifications - Light, Medium, Heavy and Extra Heavy and these 'cascade' in such a way that 'higher' specifications automatically comply with those below.