3 WAY MIXING/DIVERTING VALVES(M/D) valves have internal port switching devices which automatically mix or divert fluid in proportion to temperature in any fluid based system. They come in brass and bronze housings, with port sizes from 1/2″ to 1″. Adjustable and per-calibrated models available. Special connections, configurations or materials also available for OEM requirements. Nominal operating temperatures from 20°C to 90°C.