Anti extrusion sealing rings
In the standard configuration these stuffing box sets are composed by 7 rings. Top and bottom rings made of EUROSEAL® 2333 packing, which have an anti-extrusion function; in the middle there are three sealing rings and two adaptor rings. Taking advantage of the different densities and the conical shape of the internal rings, they guarantee a high radial expansion, even at low tightening loads.