Nitra pneumatic directional control rotary air valves are available in port sizes of 1/4 or 1/2 in. NPT with flow coefficients from 0.89-5.29. Models are available in two-position or three-position detent operation styles. The valves are four-port rotary valves and have a min./max. pressure of 0/145 psi. They can be mounted through panel and have a two year warranty.