3J3TT31 As pioneers in the filter press field, and one of the oldest and fore most manufacturers of filtration equipment, D. R. SPERRY & CO. is well qualified to evaluate your specific filtration requirements. Sperry Research has categorically filed over 60 years filtration ex perience from continuous field reports and laboratory tests. Sperry Engineering applies filtration's most advanced thinking in the develop ment of new products and new methods for obtaining better filtration at lower cost. Working side-by-side, Sperry Research and Sperry Engineering offer today's best source of information and equipment for tomorrow's production needs.
FILTER \ A complete range of /styles and sizes . . . . standard or special . . . for e v e r y filtration need. With center, side, or corner feed; open or I closed delivery; simple or thorough washing; jacketed plates for fil tering at controlled high or low tempera tures.
FEQFFSF iPERRrN FILTER BASES All types . . . all sizes. Plain or punched to your specifications. Besides cotton and paper, bases are furnished in wool, synthetics, glass a n d i woven metals. β
SPERRY
Closing Devices
N e w Handraulic Closing Device
Complete with charts, t a b l e s , a n d d i a grams to help in the o p e r a t i o n , m a i n tenance and selection of filtration e q u i p m e n t . W r i t e for your f r e e copy of C a t a l o g 7-E t o d a y .
BATAVIA, ILLINOIS
Representatives
G e o r g e S. Tar b o χ 808 N e p p e r h a n A v e . Y o n k e r s , N e w York B. M . P i l h a s h y 833 M e r c h a n t s E x c h a n g e Building Sun Francisco 4 , Cal i t o r n
Alldredge & McCobe 847 E. 17th A v e n u e D e n v e r 18, C o l o r a d o Texas C h e m i c a l E n g i n e e r i n g Co. 4 101 San J a c i n t o H o u s t o n 4 , Texas
For further information, circle number 110 A on Readers' Service Card, page 123 A 110 A
Circle number 3, page
INDUSTRIAL A N D E N G I N E E R I N G CHEMISTRY
123 A
Leakproof Centrifugal Blower H a n d l i n g corrosive, toxic, a n d radioactive gases at high t e m p e r a tures always has been a p r o b l e m . N o w a centrifugal blower has been developed for the j o b . T h e u n i t consists of a centrifugal blower a n d c a n n e d m o t o r sealed in a heavy stainless steel enclosure. T h e bear ings are pressurized by a n auxiliary p u m p impeller m o u n t e d on the m a i n impeller shaft of the blower. R a d i o active c o n t a m i n a t i o n a n d corrosiveness of the w a t e r in the rotor a n d bearing cavity are limited by laby r i n t h seals at the water-gas interface. T h e blower will h a n d l e 20 c.f.m. of gas h a v i n g a specific gravity of 6 a n d will develop a 150-foot h e a d in a 2000-p.s.i. system. T h i s blower should be of interest to any industry with problems in h a n d l i n g toxic a n d d a n g e r o u s gases. Dept. IEC, Allis-Chalmers Mfg. Co., Milwaukee 7, Wis. 123 A
Liquid Level Gage Has Maximum Visibility Product: Remote level gage.
reading
liquid
Features: H a s a n accuracy of 0.5 to 1 % of scale r e a d i n g a n d c a n be read from a n y point from w h i c h face c a n be seen. Uses: F o r r e m o t e r e a d i n g of liquid levels of boilers, tanks, a n d o t h e r units. Manufacturer: Dept. IEC, Gage and Valve Co., 80 Somerville 45, Mass.
Jerguson Fellsway,
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Soi es
D. R. SPERRY & CO.
Both e n d o t h e r m i c a n d exothermic reactions c a n be controlled quickly a n d accurately by a u t o m a t i c brine cooling a n d liquid heating systems which serve the reactor. Depl. IEC, Industrial Process Engineers, New ark, N. J.
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Sperry offers the widest range of Clos ing Devices to match your filter design needs. Each engineered in its own way to speed production, insure safety, save labor, and increase the life of the filter cloths. Choose from nine popu lar models—including the new easy-§ J to-install HANDRAULIC and the pop-if ular EHC-L Electric Closing Device [ —factory installed on new Sperry j Filter Presses or field installed in existing presses of any make.
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NEW EQUIPMENT & MATERIALS
123 A
Breather Springs Prevent Damage to Insulation on Tanks T h e p r o b l e m of d a m a g e d insula tion on tanks a n d towers w h e n they e x p a n d or contract can be m i n i m i z e d by b r e a t h e r springs. These springs follow the tank line while gently holding t h e insulation in place. T h e springs are 4 inches long w h e n
