Refractories for TAD Valves Benefits of TAD Valves: Assembly in one piece (which replaces the conventional refractory). Easy to fit, screw and mount. Preheated and dried before delivery. Long life. High resistance to abrasion from cooler particles. SIFCA Propierties: Impact resistance. Termal shock resistance. Erosion and Abrasion Resistance. Compressive Strength. Custom desing.