Abstract: A rotary ceramic tube valve is disclosed. The valve may have an outer shell and an inner ported cylinder which move in relation to each other of open and close ports on the valve. By turning the inner ported cylinder in relation to the outer shell, different orifices in the outer tube may be opened or closed. By coating the inner surface of the outer tube and the outer surface of the inner ported cylinder with a ceramic coating, friction in the valve may be reduced resulting in longer life, less heat generation, tighter tolerances and more reliable long term operation. Further, inner rotor 200 may also have cylindrical pressure balancing seals and related pressure communicating paths that provide counterforce to reduce stress on the bearings.