The complete range of valves form AP series are equipped with metallic seats in PENTAFITE that enables to manufacture metal seated ball valves with absolutely ZERO LEAKAGE and easy maintenance. The series offers high reliability and capability to solve high temperature fluid handling problem that is typical with all PENTA metal seated ball valves. High quality of mass produced standard ALFA VALVOLE models are maintained. The typical PENTAFITE elastic properties eliminates the need of additional lapping of the seats to the ball. The tightness class toward the outside is verified by RWTUV to the limits imposed from the German regulation TA-LUFT.