Two-Way Rotary Tube Selector Valve from Nu-Con (Chanhassen, Minnesota, USA) diverts or converges the flow of pneumatically conveyed powders and pellets in dilute and dense phase pressure and temperature ratings and is less susceptible to wear than flexible-hose designs. Inflatable seal on both ports and rotary divert-tube union assures airtight conveying and eliminates leakage problems typical in flap and plug-type diverter valves. The rotary tube eliminates dead pockets and ensures clean purging to prevent cross-contamination between ports. Mounts vertically or horizontally. The valves are constructed of or carbon steel.