The valves are built for obstruction-free flow of dry materials conveyed under pressure in dilute, semi-dense, and dense phase pneumatic systems. They can direct material to two different destinations or be set up to combine material flows from two different sources. Each valve can be adapted for its application and configured to a specific angle of divergence or convergence. They handle convey pressures up to 85 PSIG and may be furnished with flanged, plain, or grooved pipe connections with integral pressure switches that indicate flow direction. The valves are offered in diameters of 2- to 12-inches.