... ,Excellent abrasion resistanceaaSmoothly openingaaLight weight, easy installationaaLow Maintenance Pneumatic Ceramic Ball ValveExcellent abrasion resistance,Smoothly opening,Light weight, easy installation,Low ... cement, concrete slurry, mortar, cement, paraffin wax, slag, wood chips,clay, coal, etc. Pneumatic Ceramic Ball Valve KAIERTONG API