... -acting 4.Bi-acting and sulfuration produce PISTON ASSEMBLY For Triplex and Duplex mud Pumps Piston cores are made of ... to the cantilevered sharp lip. It also extends piston and liner life. All items are manufactured to API ... National: 7P50, 8P80, 9P100, 10P130, 12P160, N1300, C-250, K-700, 14-P-220, E-700/G-1000, K ... -500, K-380, K-500A/700A, C-250/350, JWS-400, Gardner Denver: PZ7, PZ8/9, ...