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A TLAN TA BOSTON BRIDGEPORT BU FFALO WALLACE & TIERNAN COMPANY, Inc. M a n u fa ctu re r s of C h lo rin e C on trol a n d D r y C h em ica l F e e d A p p a ra tu s N e w a r k , N e w J e r s e y CHARLOTTE CHICAGO CLEVELAN D COLUM BUS DALLAS DEN VER D ETROIT GREENSBORO ST. LOUIS W ALLA C E & TIE R N A N , 'LTD ., W ALLA C E & T IE R N A N , LTD ., TORON TO, CANADA W IN N IPE G , CANADA HOUSTON IN D IAN APO LIS JACK SO N VILLE Ka n s a s Ci t y SYRACUSE . K N O X V IL L E L E X IN G T O N LOS AN G ELES , MADISON W ASH IN GTON , D. C. W ALLA C E & T IE R N A N , L T D ., M ON TREAL, CANADA i W A LLA C E & T IE R N A N , L T D ., LONDON , ENGLAN D M IN N EAPOLIS OKLAHOM A C ITY OMAHA PH ILAD ELPH IA P ITTSB U R G H ROAN OKE SAN FRANCISCO SEATTLE T E C H N I C A EV P I H I . I C A I 1 » \ 1 4 Semi-Automatic Chlorinator Visible Vacuum Type (Autom atic Start-Stop O peration) Automatic operating schedules in water wqrks., sewage disposal plants and for industrial chlorination, are be­coming increasingly common. M ore and' more plants: are being controlled, at least partially, by means' of floats, pressure controls and program clocks:: Chlorina­tion in conjunction with any controlled cycle such as this must synchronize automatically with the program" in effect. Automatic start and stop with each cycle of plant operation to provide proper uniform chlorina­tion at all times, requires a chlorinator which will Chlorine Solution to Point of Application Float Valve Controls Chlorine Feed Main Injector Creates oper-"" ating vacuum Various methods of con­trolling Meter Vacuum during " o n ” cycle applied here Automatic valve synchronizes main injector operation with operating program Chlorine enters here £ Chlorine Metering Orifice Auxiliary Water Supply I P ' Main Water Supply Schematic Operating Diagram W & T Semi-Automatic Chlorinator always- be ready for instant action, will operate .efficiently and accurately at a uniform r.ate during .the “ o n " period-'and;'will shut dqwn instantly and com­pletely during the “ o ff" period, tp remain ready for instant adtiort. again as the cycle repeats. M erely to start and stop in synchronism however, is not enough. Unless the chlorinator feed rate jumps from zero to the prescribed rate immediately the “ on” cycle begins, accuracy is lost. Shut off too, must embody this “ snap action” , dropping the chlorine feed rate instantly to zero in synchro­nism with shut down of pump­ing .or termination of chlorina­tion cycle in a program. The hydraulic operation of the Visible Vacuum Chlorinator makes this type of equipment particularly adaptable to semi­automatic operation. Any de­vice that will interrupt the flow of water to the main injector will in turn break the vacuum in the bell jar allowing the water level inside the tray to drop and in so doing, shut off the flow of gas frorfi the container to the bell jar at the chlorine pressure reducing valve. B y simply adding an auxiliary injector which operates on a negligible quantity o f water, a / Air Vacuum Control limits auxiliary vacuum Auxiliary Injector Assembly maintains chlorinator ready for instant action when "on ‘ cycle starts