IF the compressed air in your instrument lines and process-control lines holds moisture, rust or oil, youVe

in trouble. Instrument readings ean go haywire . . . air-line valves can stick . . . controls can go entirely ffoff the b e a m " . . . the whole shootiir match can literally blow up!

Isn^t it silly to install an elaborate remote process control system and then not keep the pressure air clean anrl D R Y ! Dry air can't freeze . . . can't form rust.

It is so easy to keep the air dry, clean and oil-free with ALCOA Activated Alumina. This reliable desiccant effectively prevents moisture and oil from entering the

system. J ^ The photograph illus-

trates a typical unit used for maintaining process-control-line air in proper condition. Air is dried byT being passed through beds of ALCOA Acti­vated Alumina, alter­nately, in the two towers at the left. At the right

is an oil filter—also charged with ALCOA Activated Alumina—which cleans the air of oil and suspended impurities that m a y enter system from the compressors.

This thorough conditioning of the air helps insure the efficiency of process-eontrol systems . . . reduces main­tenance and operating hazards. (This type of equip­ment also is used for industrial compressed air and paint-spray systems.)

Court ewy of StanoIinW Oil & (ïa*· Company

Let us aencl you the booklet : "ACTIVATED A L U M I N A — I t s Propert ies a n d Uses"

This 5:)g" x %}i'\ 48-page illustrated booklet gives the properties of ALCOA Activated Alumina and describes many of its applications. Write to: ALUMINUM COMPANY O F AMERICA, CHEMICALS D I ­VISION, 6 0 4 M Gulf Building, Pittsburgh 19, Pennsylvania.

OONJT FORGET the convenience and economy of ALCOA Aluminum instrument air^line tubing in

long lengths.

ÂLCÔÂ1 A L U M I N A S a n d FLUORIDES ACTIVATED ALUMINAS · CALCINED ALUMINAS · HYDRATED ALUMINAS · TABULAR ALUMINAS · LOW SODA ALUMINAS ALUMINUM FLUORIDE * SODIUM FLUORIDE - SODIUM ACID FLUORIDE · FLU0B0RIC ACID · CRYOLITE - GALLIUM

4416 C H E M I C A L A N D E N G I N E E R I N G N E W S

Alcoa Chemicals