Abstract: The invented spray valve DEFINES two orifices that generate respective spray patterns. Preferably, the spray patterns are each conical in shape and coaxially configured so that the inside spray pattern is enveloped by the outside spray pattern. The spray valve includes two bias units that urge respective orifices to close, in a direction contrary to pressure exerted by a pressurized fluid supplied to the spray valve, that urges the orifices to open. The bias units are independently adjustable to control the amount by which each orifice is urged to close so that the proportional variation of the orifice opening size to a given variation in the fluid flow rate through the orifice, or equivalently, the fluid pressure differential across each orifice, maintains the continuity of the spray patterns over a broad range of fluid flow rates.