The ZSH(DR)L(T) series three-way ball valve uses a two-piece construction for the L-port version and an integral construction for the T-port version, with a full-bore ball and high rated flow coefficient. The L-port ball switches between two mutually perpendicular flow paths, while the T-port ball can connect or isolate three passages for mixing or diverting service. The ball surface is specially hardened for smoothness and wear resistance. Soft seats are PTFE, while metal seats use stainless steel with hard-alloy overlay or coating. High-performance double-piston rack-and-pinion or scotch-yoke actuators provide efficient transmission.