... to 16m/s 3.T:-40 to 200 Economical Bellow Seals FBDOperating ConditionsPressure: Up to 25bar or 360psiSpeed: Up to 16m ... /Primary ring:Carbon, Sic, TCSeat/Mating ring:ceramic, Suc, TCSecondary seals:NBR, Viton, EPDM, Silicone.Spring and others:SUS304, SUS316, etc