The TX20.21 and TX 20.22 gaskets have a design seating load ‘y’ equal to 6.20 N / mm2, much lower than the metal jacketed gaskets and spiral wound ones, in these between 37.9 and 68.9 N / mm2 and this allows application even on uneven surfaces. Also the factor ‘m’ equal to 2, is lower than that of metal jacketed gaskets and spiral wound ones which is between 3.25 and 3.75.
TX 20.21 is covered with graphite thk. 1,6 mm while TX 20.22 is covered with thk. 0,8 mm.