Spray valve for injecting a reactant liquid into a stream of another reactant liquid

Claim 1

THE COMBINATION OF A SPRAY VALVE AND A PIPE HAVING A STREAM OF A FIRST REACTANT LIQUID FLOWING CONTINUOUSLY THEREIN, SAID SPRAY VALVE BEING MOUNTED ON SAID PIPE AND COMPRISING: A VALVE BODY EXTERNAL OF SAID PIPE PROVIDED WITH AN INLET FOR A SECOND REACTANT LIQUID WHICH IS HIGHLY REACTIVE WITH SAID FIRST REACTANT LIQUID; A SEAT-SLEEVE WHOSE FORWARD END PENETRATES SAID PIPE AND IS FLUSH WITH THE INNER SURFACE THEREOF, WHICH SEAT-SLEEVE BEARS A VALVE SEAT WITHIN SAID VALVE BODY; A VALVE STEM EXTENDING OUTWARDLY THROUGH SAID VALVE BODY WITH ITS INNER END TEMINATING IN A VALVE PLUG HAVING A CYLINDRIAL FRONT PORTION OF SAID CLOSELY IN SAID SEAT-SLEEVE; MEANS FOR LIMITING THE EXTENT TO WHICH SAID VALVE CAN BE OPENED, WHEREBY TO PREVENT COMPLETE WITHDRAWAL OF SAID CYLINDRICAL FRONT PORTION OF SAID PLUG FROM SAID SEAT-SLEEVE; SAID FRONT PORTION OF SAID PLUG HAVING A PLURALITY OF GROOVES EXTENDING LONGITUDINALLY FROM ITS FRONT END AND EQUALLY SPACED ABOUT ITS PERIPHERY, SAID GROOVES CONSTITUTING ESSENTIALLY THE ONLY PASSAGES FOR THE FLOW OF SAID SECOND LIQUID INTO THE STREAM OF SAID FIRST LIQUID WHEN SAID VALVE IS OPEN; AND SAID GROOVES BEING SHORTER THAN SAID CYLINDRICAL FRONT PORTION OF SAID PLUG AND BEING FULLY EXTENDED INTO SAID STREAM OF SAID FIRST REACTANT LIQUID WHEN SAID VALVE IS CLOSED, WHEREBY WHEN SAID VALVE IS CLOSED SAID GROOVES WILL EXTEND BEYOND SAID VALVE SEAT AND WILL BE FULLY EXPOSED TO THE WASHING ACTION OF SAID STREAM OF SAID FIRST REACTANT LIQUID IN SAID PIPE.