new Products and literature
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Use coupon on page 129A for further information on new products and services listed on these pages
CHEMICALS AND MATERIALS ACETYLATEDMONOGLYCERIDES. Distilled acetylated monoglycerides available in semicommercial quantities in two forms: as easily emulsified white solid and as clear liquid which is miscible with castor oil and with alcohol-water mixtures. Materials are not greasy and can be used in cosmetics. Distillation Products Industries (Myvacets). 1 ACRYLIC EMULSION.Emulsion forms films having reduced tackiness and improved hardness and resistance t o penetration by water and organic solvents. Clear films are impervious to grease and resistant to discoloration and embrittle ment. They do not dissolve in toluene. Material may be thickened with nonionic agents and blended with other acrylic emulsions. Solids content is 45%. Rohm & Haas Co. (Rhoplez X-61). 2
ACRYLICEMULSION.Material produces films of unusual hardness and having high resistance to penetration by water and aliphatic solvents. Clear films are hard, brittle, and resistant to crazing and aging. Does not form continuous film when unmodified, although continuous films can be obtained by blending with softer emulsions. Available in a ueous form with pH of about 10 and s&ds content of 38%. Rohm & Haas Co. (Rhoplez B-85). 3 ALUMINUM,POROUS. Porous aluminum and aluminum alloys made by powder metallurgy process now available with uniform pore sizes ranging from 5 to 150 microns. Available in experimental quantities from Micro Metallic Corp. 4
CELLULOSEACETATEBUTYRATE. Halfsecond butyrate now available in powder form-composed of 80% cellulose acetate butyrate and 20% triphenyl phosphate-for heat-sealing applications on paper, wood, cloth, and similar porous materials. Eastman Chemical Products, Inc. 5 CHELATINGAGENT. Sequestering agent is said to show powerful ferric iron chelating power in addition to alkaline earth chelatin action. Hart Products Corp. (Kalex &). 6 CHLORINATED POLYMER. Nonhygroscopio plastic material is machineable, has good dimensional stability and is resistant to many alkalies, acids, and organic chemicals a t temperatures to boiling. Suitable for co;tinuous use a t temperatures to 250 F. Tensile strength a t 73' F. is 6000 p.s.i.; Rockwell hardness is R100. S o w available June 1955
in rods up to 2 in. diameter from The Polymer Corp of Pennsylvania f Polypenco K-51). 7
persed solids and causing them to settle into a dense, filterable sludge. Monsanto Chemical Go. (Lytron886). 14
CLADMETALS. New high vacuum brazing method for eladding a wide variety of metals for corrosive service provides an integral and continuous bonded cladding of uniform thickness and with a joint of high strength. Clad metal can he fabricated by usual methods of hot or cold working, including rolling, bending, welding, and pressing. Chicago Bridge & Iron Co. (Hortonclnd). 8
FLUOROCARBON POLYMERDISPERSIONS. Kel-F plastic dispersions can be applied to a variety of metallic and nonmetallic surfaces by spraying, dipping, or spreading t o provide corrosion resistance. Coatings are resistant to temperatures of nearly 400' F. and to abrasion, have low permeability to moisture and other liquids, have high impact resistance, and are nontoxic. Coatings are baked a t temperatures of 480' and 520' F., then quenched. The M. W. Kellogg Co. 15
COATINGS, NEOPRENE. Seoprene protective paint can be applied to metal, wood, or ceramic surfaces to form continuous, oil- and chemical-resistant rubber film with good adhesion to coated surface. Paint is flexible and shock resistant. Adhesive Products Corp. (Apco). 9 COATINGS FOR
THERMAL INSULATION.
Nonflammable protective coating for thermal insulation is compounded from neoprene and silicone rubbers and is resistant to weathering, moisture, oils, solvents, and other corrosive materials. ,4vailable in two grades: for use with magnesia, calcium silicate, felt, rock wool and asbestos or for such low temperature insulations as cork, foamed plastic, glass fibers, and cellular glass. West Chester Chemical Co. (Lagz). 10 CRACKINGCATALYSTS. Two new petroleum cracking catalysts available. One is material containing %yoalumina and said to have high attrition resistance purity, and uniformity. Other is low density product with good stability of surface area, pore volume, and activity, a s well as high attrition resistance. Davison Chemical Co. 11 CURING AGENT FOR EPOXY RESINS. Liquid curing agent for use with epoxy resins is claimed to combine the ease of handling of conventional liquid polyamines with the good performance properties of solid polyamine wring agents. Can be used in casting, potting, laminating, and adhesive applications where chemical resistance, high heat distortion point, and good electrical properties are desired. Shell Chemical Corp. ( E p o n Curing Agent 2). I2
ELASTOMER.Acrylate elastomer resists a wide range of petroleum and synthetic hydraulic fluids and can be used for packings in hydraulic systems. Elastomer is also resistant to ozone. It can be fabrjcated with conventional rubber processing equipment. Monsanto 13 Chemical Co. (Vyram).
LEAD-PLASTIC COMPOUND. Plastic compound containing up to 95% lead by weight can be precision molded into various shapes. Material is suitable for use as shielding for radioactive substances. Telectro Industries Corp. (Leadcast). 16 NYLONPLASTIC.Material available in granular, pellet, and liquid form is said to have high strength, toughness, and resistance to abrasion. Can be used as an adhepive, fiber binder, hydrocarbon barrier in rubber products, or paper coating. Can also be used as plastic sheeting or molding powder, or to bind pigments to textiles. Belding Corticelli Industries, Inc. (Nylon 6:. 17
PHTHALONITRILE. Chemical used as intermediate for phthalocyanine pigments and also suggested as an insecti-
cide now in semicommercial production by Barrett Div., Allied Chemical & Dye Corp. 18
PIPESEALING COMPOUND. Teflon pipe thread sealing compound is recommended for pipes carrying acids, alkalies, and solvents. Material is chemically inert and can be used a t temperatures from -150" F. to 500" F. The Gilbreth Co. 19 PIPE WRAP TAPE. Pressure-sensitive, polyvinyl chloride tape for pipeline corrosion prevention can be applied satisfactorily a t temperatures as low as 0' F. Available in thicknesses of 10 mils for wrapping fittings and 20 mils for straight sun wrapping. Adhesive on tape is formulated with corrosion inhibitor. Minnesota Mining and Mfg. Co. (Scotckrap Insulation 50 and 51). 20
PLASTICIZERS. Odorless form of acetyl tributyl citrate is high boiling liquid of low toxicity suitable for use in films for food packaging. Also offered is acetyl tri(2-ethylhexyl) citrate, which can be FLOCCULANT FOR WASTE TREATMENT. used as plasticizer for polyvinyl chloride Chemical flocculant developed for re- and polyvinylidene chloride polymers moving suspended solids from foundry and copolymers. Chas. Ffizer & Co., waste waters is said to be effective in Inc. (Citrofiez A-4 and -4-8). 21 concentrations of as little as 2 parts per Inquiry Card Page 129 A 1,000,000 in flocculating finely dis-
INDUSTRIAL A N D E N G I N E E R I N G C H E M I S T R Y
117 A
New Products
Since
I880
For further information, circle number 118 A-1 on Readers’ Service Card, page 129 A
PLASTICIZERS, FIRERETARDANT. Stable tris(b-chloroethyl) phosphate is claimed to provide good fire retardant properties when used as plasticizer in a variety of molded and extruded plastics and surface coatings, including polyesters, vinyl resins, cellulose acetate, ethyl cellulose, nitrocellulose, butadiene-acrylonitrile copolymers, and others. Celanese Corp. of America (CelluJlex CEF). 24 POLYESTERRESINS. Light-stabilized polyester resins are designed to minimize color fading and maintain favorable light transmission under direct sunlight in structural panels of reinforced plastic. Resins have good resistance to weathering, cracking, and most chemicals. Bakelite Co. (PLLB-6008 Natural). 43 POLYETHYLENE WAX. Low molecular weight polyethylene is offered as small pellets and is available in emulsifiable or nonemulsifiable forms for use in selfpolishing emulsion waxes, ,paste polishes, melt coatings for packaging, and other wax products. Material is compatible with many other commonly used wax materials. Eastman Chemical Products Inc. (Epolene). 44 STYRENE RESINS. Modified styrene polymers are water soluble, even in presence of large cation concentrations, but are insoluble in most organic solvents. Solutions show no appreciable changes in viscosity over pH range of 1 to 12. Suggested as tackifiers, dispersants, thickeners, and flocculants in aqueous systems, including adhesive and pa er coating formulations. Monsanto Ehemical Co .(Lustrex 710 and 770). 45
1
EQUIPMENT AND SUPPLIES
The H&B “all-jacketed” gate valve does n o t need to be removed f r o m the process line t o re-machine the seats. Replacement inserts c a n be installed i n a matter of minutes, minimizing shut-down time Also jacketed pipe, fittings, plug cocks, pumps, meters, flexible hose. Write for Catalog 5-50. 0
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H E T H E R I N G T O N & BERNER I N C . 733 KENTUCKY AVENUE
Engineers,
Manufacfurerr
I N D I A N A P O L I S 7, I N D I A N A
For further information, circle number 116 A-2 on Readers’ Service Card, paEe 129 A
118 A
CLARIFIER FOR CANE JUICE. Fourcompartment cane juice clarifier housed in cylindrical steel tank is designed with 30% less volume than conventional clarifiers of equivalent working capacity, according to manufacturer. Existing clarifiers can be converted to new design for increased working capacity without increase in tank volume. Dorr-Oliver, Inc. (RapiDorr ClariJier). 46 FEEDERS. Corrosion-resistant volumetric feeders for liquids handle dilute or concentrated acids, alkalies, or slurries in continuous operation over a wide range of capacities. Omega Machine Co. (Rotodip Model 66). 47 HEATEXCHANGERS.Fin tube heat exchangers consist of double ipe arrangement of tubes having weldecflongitudinal fins and are designed for use where conventional bare tube heat exchangers are unsuited or where fluid being heated or cooled has higher resistance to exchange of heat than fluid used for heating or cooling. Unit is said to be adaptable to changes in load requirements or duty. American Locomotive Co. 48 HEAT EXCHANGERS.Unit has shell and tubes made of borosilicate glass and header assembly of Teflon and highalumina ceramic, and is resistant to all acids except hydrofluoric. Capacity: 50 sq. ft.; weight: 165 lb. dry. For use a t temperatures to 375’ F. on shell side, 200’ F. on tube side, and a t pressures t o 20 p.s.i. Product can be introduced on tube side, jacket side, or both. Corning Glass Works. 29
INDUSTRIAL AND ENGINEERING CHEMISTRY
Vol. 47, No. 6
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HEATEXCHANGERS.Packaged umping heat exchangers are produce$ from standard tube and shell heat exchangers and centrifugal pumps made of corrosionresistant impervious graphite. Heat exchangers have up to 917 sq. ft. of transfer surface and pumps have capacities to 200 gal./min. at 100 f t . heads. Unit can be made portable. Falls Industries, Inc. (Impervide Pumping-XChangers). 30 LIGHTINGSYSTEM.Complete lighting system is offered for specific use in hazardous locations where acetylene and hydrogen are present. Consists of 150and 200-watt pendant lighting fixtures, junction boxes, tumbler switches, seals, unions, and flexible couplings and supports. Crouse-Hinds Co. 31 MIXER. German-made mixer operates on principle of centrifugal pump. When mixing tank is filled and impeller rotated rapidly, liquid is sucked from both top and bottom of tank into large holes in top and bottom of the impeller, and then driven out radially through slots in sides of impeller toward sides of tank. Neumann & Weaver, Inc. (Rheinhuette Mixer). 39 MIXERDRIVE. Speed of agitator drive suitable for reactors of up to 100-gal. capacity can be readily varied to process different materials by use of combinations of constant-speed V-belt sheaves or variable-pitch sheaves manually adjustable to give rotation from 60 to 300 r.p.m. Full-throated worm gears are rated to carry up to 3.6 hp. a t 175 r.p.m. The Pfaudler Co. (PW Drive). 33
PROTECTIVE GARMENT. Inflated suit prevents seepage of harmful gases by using air from outside source to maintain positive air pressure within garment. Liquid penetration is overcome by fusing abrasion-resistant material that is impervious to most organic and inorganic compounds over all seams. Gloves are attaohed by zippers for quick replacement. Soles are armored to legs. Standard Safety Equipment Co. 34
PUMP MOTORS. Line of totallyenclosed, explosion- roof, close-coupled motors are designef specifically for use with centrifugal pumps operating in dangerous. damn or dustv locations. Avzlable in ratihgs from li/*to 25 hp. U. S. Electrical Motors, Inc. 35 PUMPS. Hermetically-sealed motor pumps in capacities from 5 to 17,000 gal./min. can be used to pump water and other fluids a t system pressures to 2500 p.8.i. and temperatures to 650" F. Originally designed to circulate radioactive water without leakage in highpressure, closed-loop system between a nuclear reactor and steam generator. Unit has no external shaft seals. Westinghouse Electric Corp. 36 PUMPS, CONTROLLED VOLUME. Unit is engineered for precise control of fluid flow and continuous operation a t pressures ranging from 7500 t o 50,000 p.8.i. Maximum capacity a t 50,000 p.s.i. is 12.5 gal./hr.; a t 7500 p.s.i., 94 gal./hr. Milton Roy Co. 31 SCREEN,VIBRATING Vibrating screen for bulk materials uses system of rubber and steel springs upon which screen Inquiry Card Page 129 A June 1955
Special heat exchwnger materials are well known at Downingtown! Enamel-Lined Tubes. This stainless steel heat exchanger, with enamel-lined tubes, solved a serious set of problems which inheavy corrosion . intermittent cluded high temperatures operation and a tight budget. It now operates at 1 5 0 % of design capacity, at a temperature of 1200' F.-and the owner reports trouble-free service from his Downingtown unit. Dimensions: 28" diameter x 10' 0" long. Stainless steel shell. Tubes: 3%'' O.D., lined with high temperature enamel.
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Ampco 8 - D o w n i n g t o w n engineered these t w o fixed tube sheet benzene condensers for export. Process conditions required copper a l l o y tube sheets, yet the customer did not want a gasketed joint between tube sheets and shell flanges. S o w e welded the Am co 8 tube sheets directly to the steel &ells, thus saving the cost of a l l o y shells. Dimensions: 14" diameter x 12'0" long. Eighty copper tubes, 1" O.D. x 14 gauge. Ampco 8 tube sheets %"thick.Ampco 8 heads %"thick.Design pressure is 7 5 psi on shell and tube sides,
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Solid Nickel-This s o l i d nickel reboiler for vacuum service-one of eight identical units fabricated for o n e customer-was e n g i n e e r e d by D o w n i n g t o w n to use a minimum amount of scarce and expensive materials. T h e double tube sheet construction required special assembly techniques. Notice the large nozzles, which were installed with a minimum o f distortion b using proper care and skill during w e d i n g . M a d e of ,/" s o l i d nickel. D i m e n sions: 34" diameter x 17' 0" l o n g . Has 292 nickel U-tubes, 1" O . D . x 16 B.W.G.
W e furnish complete thermal and mechanical designs, or fabricate to your plans. Send now for additional information.
Downingtown Iron Works, Inc. Downingtown, Pennsylvania N e w York Office: 5 2 Vanderbilt Avenue, N e w York 17, N. HEAT EXCHANGERS
TOWERS
PRESSURE VESSELS
STORAGE TANKS
Division of: Pressed Steel Tank Company, Milwaukee 14, Wisconsin
Y.
STEEL A N D A U O Y PLATE FABRICATION
Manufacturer of Hackney Products
CONTAINERS AND PRESSURE VESSELS FOR GASES, LIQUIDS AND SOLIDS For further information, circle number 119 A on Readers' Service Card, page 129 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
119 A
You can repack
New Products
1
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R
GoPoPLUG VALVES
under full operating conditions
frames are mounted. Controlled resonance induced by small mechanical exciter produces vibrations for separating materials according to eize, thereby overcommg screen surface clogging. Balanced system is designed to reduce energy losses. Hewitt-Robins, Inc. (Hi-G Screen). 38
SCREEN,VIBRATING. Dual deck screen has two decks operating in reverse motions, with guide links permitting them to follow the eccentric drive movements counterbalancing each other. ScreenP operate a t frequency of 1000 vibrations/ min. and amplitude of 5/16 in. Available for either suspension or floor mounting in any specified length for installation horizontally or declined. Syntron Co. (Model 243). 39 SPRAYNOZZLE. Hydraulic spray nozzle can be indexed to the requirements of any production spraying operation where intermittent spraying is needed. Nozzle is turned on or off by com ressed air actuating an air piston in t i e nozzle. Supplied with standard interchangeable orifice tips for producing flat, hollow cone, and full cone sprays in a range of capacities. Spraying Systems Co. 40 TEST CABINET. Air conditioned test cabinet provides controlled temperatures from -30" to 150' F. and relative humidity range from 5 to 95%. Air capacity is 200, 400, or 600 cu. ft./min. A'r conditioning unit is easily accessible in insulated cabinet adjoining test cabinet. Window provides view of test material. Niagara Blower Co. 41 TUBE BUNDLE HANDLING DEVICE. Hydraulic tube handling device provides safe and convenient means for removing and replacing heat exchanger bundle tubes. Packaged unit includes pump, hose, adjustable yoke for accommodating wide range of exchanger diameters, ram, tie rods cable, and other W. Kellogg Co. equipment. The (Hydro-ejector). 42
id.
TUBING, TEFLON. Line of thin- and heavy-walled tubing extruded from tetrafluoroethylene resin now available from Pennsylvania Fluoro Plastics Co. 43
Shutting down to change valve packings costs dearly in time and money. That's why Warren Petroleum uses Hamer gland-packed Plug Valves. Not only can Hamer glandpacked plug valves be repacked under full operating conditions, but because of the exclusive plug adjusting nut, a feature of all Hamer Plug Valves, the valves can't stick or freeze. No matter what the time lapse or service you have positive E-Zturn control at all times.
HAMER Line Blind V a l v e s Built for strength and durability, Hamer Line Blind Valves are the modern means of blinding pipe lines quickly and effectively. A oneman, one-minute operation. Cuts costs, and speeds up operations.
Send
ER
for FREE Catalog
VALVES,
INC.
2919 Gardenia Ave., long Beach 6, Calif, Representatives throughout the World For further information, circle numbers 120 A-1, 120 A-2
120 A
on Readers' Service Card, page
VALVES,GLOBE. Bronze globe valve for throttling service has seats and disks of Brinalloy-newly developed metal alloyed of nickel, chromium, and silicon and said to be more resistant to wear and corrosion than 500 Brinell stainless steel. Integral seats and disks are lapped to obtain smooth, flat seal and are claimed never to require replacement or regrinding. Lunkenheimer Co. (LQSOO Valve). 44
INSTRUMENTS FLOW TRANSMITTER.Force balance flow transmitter measures differential pressures and transmits a 3 to 15 p.s.i. signal to receiving, recording or controlling instruments. Transmitter provides continuous adjustment over entire range of 0 to 50 in. u to 0 to 250 in. of water differential witgout change of parts. The Foxboro Co. (1SA d / p Cell Transmitter). 45
129 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
Inquiry Card Page 129 A I ,
Vol. 47, No. 6
LITHIUM CHEMNALS SERVE INDUSTRY!
LlTH I UM CORPORATION OF AMERICA, INC. Suite J
RAND TOWER MINNEAPOLIS 2, MINN. ~
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M I N E S : K e y s t o n e , C u s t e r , Hill City, S o u t h D a k o t a Bessemer City, N o r t h C a r o l i n a * C a t Lake, M a n i t o b a Amos Area, Q u e b e c C H E M I C A L P L A N T S : S t . Louis Park, Minnesota .Bessemer City, N o r t h Carolina RESEARCH LABORATORY: St. Louis Park, Minnesota .. For further information, circle number 121 A on Readers’ Service Card, page 129 A
June 1955
INDUSTRIAL AND ENGINEERING CHEMISTRY
121 A
New Products GAS ANALYZER. X-ray absorption gas analyzer is designed for rapid quantitative analysis of elements of high atomic weight in gas mixtures. Unit consists of separately housed analysis assembly containing x-ray generator, Geiger tube, and gas system and circuit panel with counth g rate meter. Strip chart recorder continuously records mole yo of primary gas in diluent. North American Philips Co., Inc. 46 GELOMETER. Instrument for automatic determination of gelation time or stability of5olyesters and phenolic materials in research and control work provides rapid gel tests a t various temperatures. Oscillator sensitive from 5000 to 50,000 centipoises automatically stops timer when desired viscosity range is reached. Constant temperature bath provides temperatlures to 212' F. Rurrell Corp. (Castor Gelmeter). 47
INDICATING SCANNER. Electronic instrument monitors 6, 12, 24, 48, or more steps in a manufacturing process a t a maximum rate of one point/sec. Unit will actuate alarm when process variable such as level, temperature, or pressure moves beyond preset control zone. 48 Robertshaw-Fulton Controls Co. LIQUIDMETER. Explosion-proof meter, with electric shutoff, is designed for use in hazardous atmospheres to measure definite volume of liquid and to stop flow by shutting a solenoid valve a t completion of delivery. Consists of standard meter plus register containing switch for completing electrical circuit after passage of predetermined quantity of liquid through meter. Buffalo Meter Co. 49 Yes, w e are literally doing this; spray drying whale components on a modern whaler in the Antarctic seas. A wealth of spray drying experience i s available through Nerco-Niro and whether your requirements are a few pounds or many tons per hour w e invite you to consult a Nerco-Niro engineer. Pilot plant and laboratory facilities are at your service for research and development work. Custom drying at plant size capacity is just one more service w e offer, but one that enables you to meet present production demands while your own plant i s tooling up.
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Write for Bullefin No. 226
Nichols Engineering & Research Corp. Nerco-Niro Spray Dryer Division 70 PINE ST., NEW YORK 5 , N. Y. Indianapolis
Montreal
3 For further information, circle number 122A on Readers' Service Card, page 129 A
122 A
OSCILLOGRAPHS. Portable oscil!ographs are designed for four- or sixchannel recording and offer range of 16 charts speeds with travel variation from 10 in./day to 10 in./sec. Weight: fourchannel unit, 36 lb.; six-channel recorder, 48 lb. Brush Electronics Co. 50 OXYGEN ANALYZER. PortabIe paramagnetic oxygen analyzer is designed as quick, simple means of measuring oxygen with accuracy of +l% of full scale for use in field, plant, or laboratory. Can be used for measuring continuouslyflowing samples or for fixed volume samples as small as 3 cc. Ranges of 5% or more between 0 and 75% 0 2 , 15% or more bdtween 75 to lOOyo 0 2 . Arnold 0. Beckman, Inc. (Model CW). 51
PNEUMATIC TRANSMITTER.Transducer which can be mounted on back of a control panel converts d.c. millivolt measurements of process variables into a proportional 3 to 15 p.s.i. pneumatic output which is transmitted to graphic panel receivers. Standard unit provides spans as narrow as 10 my. or as wide as 60 mv. 52 The Foxboro Co. PRESSURE TRANSIENT RECORDER. Instrument utilizes interferometric optical principles for recording short term pressure variations over a wide series of pressure ranges. Provides film record suitable for rapid analysis and data reduction. Consists of combined transducer, optical system, and camera housed in small case and a control unit which can be located remotely from transducer. Beckman & Whitley, Inc. 53
INDUSTRIAL AND ENGINEERING CHEMISTRY
Vol. 47, No. 6
Literature SPECTROGRAPH. Instrument operatee with two gratings which provide two different spectral ranges in a single exposure on a single plate or on two different plates for high speed analyses. Slit system can be opened quicltly for thorough cleaning, but can be returned automatically to any one of several precise widths with accuracy of ’/z micron. Bausch & Lomb Optical Co. 54
SPECTROPHOTOMETER. Double-beam infrared recording spectrophotometer for quantitative or qualitative analysis is designed for quick interchange of prisms. Use of sodium chloride, calciumPfluoride, lithium fluoride, and potassium bromide prisms gives instrument spectral range of 1.5 to 26 p. Scanning speed, slit width, and amplifier gain are easily adjusted by individual controls. Baird Associates, Inc. ( M o d e l 4-66). 55 TIME-PROGRAM AND CYCLE CONTROLLER. Instrument combines in compact two-case unit a two-pen, two-car&timeprogram controller with a cycle controller which times up to eight operations. Time-program controller controls two variables through any predetermined program of valiies by means of aluminum cam. At same time, cycle controller controls opening and closing or stopping and starting operations. The BriBtol co. 56
ULTRASONICGENERATOR. Ultrasonic generating equipment provides lowfrequency vibrations suitable for ultrasonic dyeing and wet finishing investiations on chemicals or fibers. Unit can e used also for degreasing and cleaning operations. Consists of transducer assembly with 24,000-cycle magnetostriction transducer, borosilicate glass jar, electronic generator, and connecting cables. Acoustica Associates, Inc. ( M o d e l DR-400). 57
Sweco Handles 100 LbdMin. Precision Screening for American Cyanamid Co. Precision screening of fine mesh soybean meal and nitrophenide is import a n t t o quality control and product uniformity of Megasul, manufactured by the Lederle Laboratories Division of the American Cyanamid Co. Megasul is a poultry food additive f o r the prevention and control of coccidiAcetate, vinyl * Acid, molybdic . Aluosis. Screening specifications called mina * Barium . Bentonite * Calcium for a high-accuracy throughput of Carbonate Carbon Casein * Cata90-100 lbs/min. F o r nearly two years lysts . ti^ Soda ~ i these specifications have been met Earth Dolomite * Glue * Graphite * Gypsum . Kaolin * Magnesium * Nis a t i s f a c t o r i l y w i t h o w e 48-inch trates * Paints . Plastics . Phosphates SWECO circ;lar vibrating screen * Potash * Resins . Silica * Shellac . separator. Lubrication has been the Tunasten. zinc lares and com,,ounds~ only maintenance cost t o date.
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*Portio1 list
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SERVICES CURRENT LITERATURE SURVEY. Weekly service provides prompt listings of tables of contents from current issues of about 400 scientific and technical journals. Spartan Co. (Current Articles Unlimited). 58
CHEMICALS AND MATERIALS ADHESIVES FOR TRANSPARENT FILMS. 20 pages. Booklet on handling adhesives for transparent films describes various types of available adhesives and their selection and use. National Starch Products, Inc. 59 ALUMINUM. 80 pages. Book describes and illustrates the advantages and applications of aluminum in the process industries, describes the performance of aluminum with various chemicals, and discusses design considerations for process equipment. Aluminum Co. of 60 America, Inquiry Card Page 129 A June 1955
I,
INDUS
S W E C O G Y R A T O R Y SCREEN SEPARATOR a t Lederle Laboratories Division of American Cyanamid Co. handles 100 lbslmin. through a 10-mesh 48-inch circular screen.
Eagle-Picher Co. Saves $75 Per Day With Two SWECOs The Eagle-Picher screening problem : recovery of saleable material in processing of diatomaceous earth. Solution : installation of two Model C-2D-8 SWECO circular vibrating screen separators. Results : savings of $75 per d a y on a 24 hour, 6 d a y week schedule. Customer comment: “In 2 years of continuous operation, no motor failure - practically no maintenance-screen life exceptional and beyond expectation.”
S W E C O “3-D“ S C R E E N I N G A C T I O N tumbles material in three directions a t once.. , increases efficiency as much as 10 to 1.
A-
Southwestern Engineering Company
4800 Santa Fe Ave., Los Angeles 58, Calif. Logan 8-6262
SW€CO
Engineers Constructors Manufacturers S W E C O PRODUCTS
I
I I
Please send Catalog No. 52-10 and special data on the following material : Have a SWECO Screening Engineer call us. Name
Position
Screen Separators I Heat Exchangers I Address Custom fabrication of special vessels for Zone- Statethe process industries C City For further information, circle number 123 A on Readers’ Service Card, page 129 A
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iIAL AND ENGINEERING CHEMISTRY
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literature AMINOETHYLETHANOLAMINE. 4 pages. Properties and applications of reactive intermediate for surface active agents, textile assistants, sequestering agents, and insecticides. Carbide and Carbon Chemicals Co. (F-6.456). 61
BARIUMCHEMICALS. 24 pages. Bulletin covers properties and uses of various barium chemicals and gives information on their handling. Westvnco Mineral Products Div., Food Machinery and Chemical Corp. 68 CARBON,ACTIVATED. 3 ages. Bulletin describes properties, agantages, and applications of activated carbon as a catalyst or catalyst support in chemical processes. Barnebey-Cheney Co. (Tech. Bull. 20). 63
KNIGHT H o t Gas COOLING TOWERS Knight engineers design and build towers for processing high temperature gases. They are specialists in steel masonry constructions for high temperatures as well as corrosive service. Following installations are typical: Mannheim furnace gas cooler ..................................................... 1100"F Waste HCI gas disposal ........... Removal of fly ash from flue g Kiln gas cooler.................................. Condenser for submerged com Herreshoff roaster gas scrubbe Sulfur burner gas scrubber .................................................... 950°F Smelter gas cleaner and cooler. ................................................ 800 "F
In these towers, Knight engineers used steel shells lined with PYROFLEX sheet membrane that resists thermal decomposition. Over this membrane goes insulatine and acid brick bonded in Knight's High Temperature Cement. Knight Towers give superior performance because: No moving parts, simple to operate. Corrosion resistant throughout. Wide operating range. Heat resistant construction. Easily maintained. Individually engineered. Guaranteed performance. W h e n your processing includes cooling, absorption, condensation, or scrubbing; Berl Saddles Tower Packing send us the facts on service More Area, Higher conditions for specific recomCapacity, Less Resistance mendations. 9906 Kelly Ave.. Akron 6, Ohio
For further information, circle number 124 A on Readers' Service Card, page 129 A
124 A
CHLOROMETHANES. 28 pages. Data on uses and on physical and chemical properties of methylene chloride, methyl chloride, chloroform, and carbon tetrachloride presented in booklet. Tables and graphs. Solvay Process Div., Allied Chemical & Dye Corp. 64 COATINGS. 12pages. Bulletin describes various types of protective coatingsincluding .vinyl resins, acrylic resins, epoxy resins, silicone resins, synthetic rubbers, and primers-offered by David E. Long Corp. (Del Coatings). 65 COATINGS, SILICONE.4 pages. Folder covers characteristics and applications of heat-resistant silicone-base finish for protecting metal products a t high temperatures. Midland Industrial Finishes Co. (Sicon). 66 CUPRONICKEL ALLOYS. 12 pages. Reprint presents data on the corrosion reRistance of cupronickel alloys containing 10 to 30% nickel in various industrial liquids. The International Nickel Co., 67 Inc. DIISOCYANATES. 9 pages. Bulletin contains information on properties, reactions stability, assay methods, and toxicity of two diisocyanates. Graphs and bibliography. The Carwin Co. 68
EXPLOSIVESAND PROPELLANTS.
18 pages. Booklet reviews various industrial mes for high energy materials, including explosives, propellants, and pyrotechnics. Production figures and application information. Southwest Research Institute. 69
FATTY ALKANOLAMIDES. 14 pages. Technical bulletin gives data on properties and applications of a series of nonionic surface active agents, with formulations for their use in various products. Emulsol Chemical Corp. (Tech. Bull. 44). 70 FATTYAMINE SALTS. Booklet covers characteristics and applications of acetic acid salts of fatty amines which can be adsorbed onto metallic and nonmetallic surfaces from liquid systems. ilrmour and Co. (Armacs). 71 ~
GELLING AGENTS. 6 pages. Data sheets present information on use of three thickening, gelling, and suspending agents processed from attapulgite for use in organic and aqueous systems. Minerals & Chemicals Corp. of America (Permagel, Attasorb, and Attasol). 78
INDUSTRIAL AND ENGINEERING CHEMISTRY
Vol. 47, No. 6
HEXACHLOROPHENE. 24 pages. Annotated bibliography contains abstracts of 136 articles and 19 patents on properties, test methods and medical and cosmetic uses of chiorinsted bisphenol. Sindar Corp. (Tech. Bull. H - 1 ) . 73 INDUSTRIAL CHEMICALS. 40 pages. Catalog describes detergents, wetting agents, emulsjfiers, brighteners, sequestrants, dyeing assistants, organic chemicals, and iron powders marketed by hntara Chemicals Div., General Aniline & Film Corp. 74
WZLMAD THERMOMEaTERS 1
When Wilmad precision teams up with the prices you ordinarily pay for inferior thermometers that's news1 Study the prices listed in the tablet below and order enough for your lab today. 10/30 ENGRAVED STEM THERMOMETER HlTE OR PRECISION GROUND JOINT YELLOW BACK GLASS
.. .
INSULATINGSHEET MATERIAL. 16 pages. Information on properties and application of strong, fireproof insulating sheet material for constructing dryers, ovens, breechings, and housings. Johnshlanville (Marinite). 75
- -
(SEE FIG. I )
STEM
ITACONIC ACID. 20 pages. Technical bulletin gives information on properties, reactions, polymerization, handling, and uses of itaconic acid. Chas. Pfizer & co., Inc. (Booklel8.%'). 76
llOC
15OC
360C
25Oc
r 4.75 4.85 5.10 5.35 5.55 5.70
LAMINATING RESINS. 10 pages. Bulle-
tin covers specifications of laminating varnishes consisting of phenolic resins in alcohol or water solution for making cloth and paper laminates. Synvar Corp. (Synvaren Resins). 77
6.00
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ENCLOSED SCALE THERMOMETE i PYREX BRAND GLASS PRECIS10 GROUND INTERCHANGEABLE 10/30 J N T
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LININGS FOR TANK CARS. 4 pages. Reprint of article on use of sheet linings and coatings in tank cars for protection from corrosion and contamination. Metalweld, Inc. 78
(SEE F I G . z j
STEM
15OC
250C
36OC
3" 4"
5" 6" 5'' 79 8Y z'' 10" 11"
MOLYBDENUMCHEMICALS. 3 pages. Bulletin lists and describes bulletins on properties and uses of molybdenum chemicals that are available from Climax Molybdenum Co. (Bull. Ch-3). 79
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ENGRAVED STEM THERMOMETERS PREPRICES ON SPECIAL CISION GRADE RANGES AND STEM LENGTHS AVAILABLE ON REQUEST
MOLYBDENUMPENTACHLORIDE 4 pages. Data on the physical, thermodynamic, and chemical properties of pure molybdenum pentachloride. Climax Molybdenum Co. (BuEZ. Cdb-3). 80
(SEE FIG. 3)
Range -10 to
Division Length
Price
$1.45
PAPERTHERMOMETERS. Folder de-
scribes applications of inexpensive heatsensitive coated papers calibrated to indicate temperatures from 113' to 580" F. by irreversible change in appearance. T h e Paper Thermometer Co. (Thermopaper). 81 PEROXIDE BLEACHING. 7 pages. Reprint discusses use of hydrogen peroxide .as a final stage treatment in bleaching kraft and soda pulps. Becco Chemical Div., Food Machmery and Chemical Corp. (Bull.6.4). 82 PLASTICS, HEAT-CONDUCTING. 4 pages, Bulletin covers applications of material t h a t can be used in place of steam jacketing, thermal electric systems, and steam tracing systems for valves, pumps, piping, and other equipment,. Thermon 83 Mfg. Co. POLYESTER LAMINATES. 4 pages. Folder lists properties and applications of glass-reinforced polyester laminate available in structural sheet form. Strick Plastics Corp. (Lamicor). 84 POLYESTER RESINS. File folder contains data sheets on polyester resins suitable for glass-reinforced laminating applications, covering properties, curing information, and suggested uses. H. H. Robertson Co. (Stypol Resins). 85 Inquiry Card Puge 129 A
3une 1955
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1.60 1.75 2.00 2.15 2.45
PYCNOMETER THERMOMETER (YELLOW BACK) (SEE FIG. 4)
The yellow back of this thermometer makes for more accurate reading. Available with scale from 00 to 40OC in 1/50 increments. Thermometers have g 10/18 joint. Prices on request. PRECISION BORE ADJUSTABLE THERMOMETER ADAPTER with 10/18 joint Price $2.50 (SEE FIG, 5 )
These thermometers are representative of the Wilmad line. We can supply many other types. Send for detailed information on precision bore tubing catalog today.
WllMAD GLASS COMPANY,
IWC.
DEPT. A
LANDISVILLE
@
NEW JERSEY
SPECIALISTS IN RESEARCH LABORATORY GLASSWARE
I
'
For further information, circle number 125 A on Readers' Service Card, page 129 A
INDUSTRIAL A N D E N G I N E E R I N G CHEMISTRY
125 A
Literature 4 pages. Folder covers physical pro erties and applications o polyvinyl choride coatings and of rigid polyvinyl chloride for fabricating corrosion-resistant process equipment. Quelcor, Inc. 86 POLYVINYL CHLORIDE.
of high purity and describes its uses as reinforcing, suspending, flatting, gelling, thixotropic, anticaking, and antislip agent in various products. Godfrey L. Cabot, Inc. (Cab-0-Sil). 91
SILICA,FUSED. 4 pages. Folder dePOLYVINYL CHLORIDE STABILIZERS. scribes properties and applications of Data sheets give specifications and rec- fused silica material that is resistant to ommendations for use of organic zinc acids and to high temperatures and shock. compound and of liquid barium-cadmium Amersil Co., Inc. (Rotosil). 92 stabilizer for vinyl resins. Advance Solvents & Chemical Corp. (Advastab XSO- SOLVENTS. 8 pages. Solubility charts 15 and X6S-74). 87 and recommended formulations for four solvents for use in insecticides, fungiREINFORCING MATERIALS FOR PLASTIC cides, and herbicides given in bulletin. LAMINATES. 44 pages. Technical bulle- Eastern States Chemical Corp. (Esspesol tin covers three types of plastic rein- Solvents). 93 forcements made of asbestos fibers. Information on properties of asbestos fibers STAINLESS ALLOYS. 10 pages. Reprint and data for engineering and design of gives information on the selection and reinforced asbestos-base plastic lami- use of corrosion-resistant cast stainless nates. Raybestos-Manhattan, Inc. (Tech. alloys. Alloy Casting Institute. 94 Bull. T-55). 88 STAINLESS STEEL. 24 pages. Booklet RESIN DISPERSIONS FOR PAINTS. discusses 17 methods for joining stainless Technical report presents data on the use steels brazing, and soldering, in emulsion paints of resin dis ersions as wellbyaswelding, describing flame and arc cutbased upon rosin and modified! rosins. ting procedures for severing stainless Hercules Powder Co. (Dresinol). 89 steel. Crucible Steel Co. of America. 95 AND VEHICLES. 32 pages. Data on characteristics and use of alkyd resins, polyester resins, copolymers, flat wall vehicles, esters, plasticizers, hard resins, natural resins, and other produrts for paint formulation. Archer-DanielsMidland Co. (Cat. 106). 90 RESINS
SILICA, COLLOIDAL. 8 pages. Bulletin presents information on chemical and physical properties of new colloidal silica
resins, vinyl toluene resins, and vinyl esters. Bibliography. Tall Oil Asaoc. (Bull.15). 97
TEFLON. 4 pages.
Folder tabulates pro erties of tetrafluorethylene resin anzdescribes Teflon parts produced by Sparta Mfg. Co. (Bull. 166). 98
TOOLINGRESINS.
8 pages. Brochure describes laminating resins, casting resins and other epoxy resins for use as tooling materials. Furane Plastics, Inc. (Espocast Resins). 99
STEELS, TUBING. 4 pages. Folder tabulates data on chemical analyses and specifications of standard carbon, alloy and stainless tubing steels for elevated temperature and pressure service. The Babcock & Wilcov Co. (TDC 177). 96
TALLOIL FOR RESINS. 4 pages. Part I11 of report on tall oil in resins discusses use of material in phenolic resins, styrene
EQUIPMENT AND SUPPLIES 12 pages. Bulletin discusses the selection and use of cyclone separators and pipeline aftercoolers on compressed air systems for cooling, drying, and cleaning air. R. P. Adams Co., Inc. 100
AFTERCOOLERS AND SEPARATORS.
COOLINGTOWERS. 4 pages. Reprint of article on protection of cooling tower wood from chemical and bacteriological attack by use of acid treatment and wood preservatives. W. H. & L. D. Betz (Tech. Paper 130). 1Of
DRYERS, SPRAY.12 pages. Catalog covers design features, operating principles, and performance data for five standard sizes of spray dryera manufactured by Dairy Equipment Div., Blaw-Knox Co., Inc. IO!?
MODEL INDUSTRIAL LABORATORY
MODEL
Cambridge pH
rs
The three portable models illustrated above incorporate new and important advantages. A.C. line operation eliminates battery nuisance. Laboratory and Research models use electron-ray tube for precise null-point indication. Industrial model is directreading, continuous-indicating; ruggedly built for plant use. Accuracy: Research .02 pH, Laboratory .05 pH, Industrial .lo pH. Cambridge pH equipment also includes single- and multi-point indicators and recorders. Send for Bulletin 91 0-M.
CAMBRIDGE INSTRUMENT COMPANY, INC. 3055 G R A N D CENTRAL TERMINAL, NEW YORK 17, N. Y.
Pioneer
M a n u f a c t u r e r s
P R E C I S I O N
of
I N S T R U M E N T S
Circle NO. 126 A-2 on Readers’ Servici Card, page 129 A
literature EXHAUSTFANS. 6 pages. Folder de-
scribes corrosion-resistant exhausters for handling gases and fumes. Tables of capacities and chemical resistance data. 103 Haveg Corp. (Bull.8 7 ) . FEEDERS, G R A V I M E T R I C . 4 pages Folder describes grivametric feeder with capacity from 1 t o 4000 lb./hr. for dry materials. Omega Machine Co. (Bull. bO-Hl2A). 104
FEEDERSAND CONVEYORS. 50 pages. Condensed catalog containes technical data and descriptions of vibratory equipment, feeders, conveyors, power tools, and other material handling equipment. 105 Syntron Co. (Cat. 554).
FILTER-CLARIFIERS. 4 pages. Description of circular sand filter-clarifiers consisting essentially of a spiral rotating scraper suspended a t the tank center which takes a out from the surface of the sand when the filter rate decreases. Hardinge Co., Inc. (Bull. SO-C). 106
HEATING SYSTEMS.18 pages. Bulle-
tin discusses features, advantages, and applications of high pressure superheated water systems for industrial heatmg. J. 0. Ross Engineering Corp. ( S u p e r t h e m Systems). 107 MOTORS. 21 pages. Booklet illustrates features of newly designed, compact, protected motor. U. S. Electrical Motors, Inc. ( T y p e H Uniclosed Motor). 108
MOTORS,PUMP. 4 pages. Folder describes and illustrates features of vertical hollow shaft pump motors designed for heavy duty turbine pump requirements. ACEC Electric Corp. 109 O-RINGS. 16 pages. Catalog gives design, dimensional, and other information on O-rings for dynamic sealing and static gasketing. The Garlock Packing Co. (Cat. AD-148). 110 OVENS, CABINET. Bulletin illustrates and describes line of standard cabinet ovens for use with gas, electric, or steam heat a t temperatures to 600' F. Young Brothers Co. (Bull. 10-8). 111
Catalog covers line of standard pumps for pressures to 1500 p.s.i. and low pressure pumps for pressures to 800 p.s.i. in designs for capacities from a few cc./hr. to 3300 gal./hr., as well as proportioning control equipment. Philadelphia Pump and Machinery Co. 112 PUMPS, CONTROLLED VOLUME.
2 pages. Data sheet describes use of controlled volume pumps to meter small quantities of wet and dry chemical reagents in cement beneficiation. Milton 113 Roy Go. (Data Sheet H-54-3). PUMPS,
CONTROLLED VOLUME.
RECIPROCATING. 8 pages. Bulletin presents specification and performance data on vertical triplex pressure pumps for oil recovery and industrial servire. Ajax Iron Works (Bull. 543). 114 PUMPS,
BRICK FOR CEMENT KILNS. 36 pages. Technical data and installation instructions for periclasechrome refractory brick for lining cement kiln hot zones. Kaiser illuminum & Chemical Sales, Inc. 115 SCREENS, VIBRATING. 12 pages. Selection data on line of vibrating screens for medium and heavy duty operations in
REFRACTORY
June 1955
scalping, sizing, dewatering, and rinsing a variety of materials. Link-Belt Co. (Book 2654). 116
m
NEW JOBS FOR ( 0 2
h kl
There a r e typical exarnples of C 0 2 a t work. M a n y other important C O z applications, cover' i n g all industry, a r e discussed in a booklet available from LIQUID world's CARBONIC largest producer of C 0 2 .
SIGHTFLOW INDICATORS. 2 pages. Sheet describes and illustrates line of transnarent and reflex sight flow indicators lor use on 1/2- to-2-in. pipelines. Jerguson Gage & Valve Co. (Data Unit 253). 117
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TUBINGAND PIPE, STAINLESS STEEL. 4 pages. Folder covers properties and working instructions for Carpenter 7 Mo stainless tubing and pipe said to combine resistance to general corrosion and stress corrosion cracking. The Carpenter Steel Co. 118
VALVE CONTROL SYSTEMS. 20 pages. Design manual on valve remote control systems contains data for selection of flexible shafting, standardized valve operating gear for reach rods, and geared joints. Stow Mfg. Co. (Bull. 555). 119
Bacteria breeding air is banished when foods are packaged in an atmosphere of CO:! gas. 50% heavier than air, COz gas effectively displaces this enemy of flavor and freshness. Cost? Amazingly law. Investigate.
VALVES, CONTROL. 4 pages. Folder describes and illustrates diaphragm control valves, pressure regulating valves liquid level controllers, strainers, and .float valves available from Kieley & Mueller, Inc. 120 VALVES, MOTORIZED. Folder tabulates specifications of electric motorized valve assemblies consisting of combinations of globe or butterfly valve bodies, linkages, and electric power units. Minneapolis-Honeywell Regulator Co. (Bull. 8506). 121
O f all weak acids, COz is a bolt's best bet. As an aid in removing caustic soda after mercerizing, boil-off and vat dying, COz has no equal. It cannot burn the cloth, is the easiest acid to handle and produces a superior "hand."
VALVES,RELIEF. 20 pages. Catalog describes multiport relief valves designed for steam, air, or gas service. Cochrane Corp. (Pub. 6200). I22 VALVES,SOLENOID. Catalog covers line of five basic types of solenoid-operated valves and explains how t o choose valves for various applications. The Skinner Chuck Co. 123 VENTILATING AND EXHAUST SYSTEMS. 8 pages. Brochure gives information on the selection and installation of corrosionresistant polyethylene ventilating and exhaust systems from prefabricated components and fittings. American Agile Corp. 124
COz is extensively used in the manufacture of both plastic sponge and foam rubber. Two of CO;.'s most important applications in these fields include use as a foaming agent and as a neutralizing acid.
N&W... yours There's practically no end to the important jobs that COZ-combined with LIQUID savvy-is doing. Chances a r e this combination can come up with some surprising answers for you, too.
INSTRUMENTS
FREE BOOKLET! -mail
D.C.AMPLIFIERS. 12 pages. Features, performance specifications, and applications of electronic linear amplifier for low-level d.c. voltage measurements covered in bulletin. Hagan Corp. (Model P PowrAmp). 125 ELECTRON MICROSCOPES. 20 pages. Pamphlet lists specifications of two types of electron microscopes and describes their operation and uses. Radio Corp. of America (3R2546). 126 FLOWMETERS. 2 pa es. Data sheet describes float-actuate3 meter for measuring, indicating, recording, totalizing, and controlling flow in open channels. Minneapolis-Honeywell Regulator Co. (I.D.S. 10.3-4a). 127 FURNACEPRESSURE CONTROLLERS. 4 pages. Information on indicating furnace pressure controller and its uses in Inquiry Card Page 129 A
1,
this coupon.
THE LIQUID CARBONIC CORPORATION 3 1 20 South Kedzie Avenue, Chicago 23, Illinois Send me my free "Applications Unlimited" booklet. Name Company PositionAddressCity Zone-StateCircle No. 127 A on Readers' Service Card, page 129 A
INDUSTRIAL A N D ENGINXERrNG CHEMISTRY
127 A
literature measuring and controlling furnace operation. Minneapolis-Honeywell Regula128 tor Co. (Bull. 7404).
GAS ANALYZERS. New quarterly house organ presents news and information on ap lications of infrared gas analyzers for infustrial use. Liston-Becker Instrument Co., Inc. (The L-B Analyzer). 1 29
RESISTORS. 4 pages. Data sheet describes line of fixed d.c. and a x . electri-
cal standard resistors available from Leeds & Northrup Co. (Data Sheet EB6 [ I ] ) . 130
THERMOMETERS.16 pages. Catalog and price list of glass laboratory thermometers includes ASTM, ground joint, immersion, Beckmann, distillation, and other types. Brooklyn Thermometer CO.(Cat. 55-A). 131 THERMOMETERS, CAM PROGRAMMER. 4 pages. Specification sheet gives engineering data for internal cam programmer thermometers designed to maintain a definite relationship between temperature and time. Minneapolis-Honeywell Regulator Co. (Spec. Sheet 606). 132
Seal arrangement showing interchangeobilityof mechanical seal (A) and conventional stuffing box (8).
THERMOSTAT.2 pages. Sheet gives specifications and drawing of li uid filled, local bulb thermostat designe8 for control of process and oven temperatures a t electrical loads up to 15 amp. Fenwa1, Inc. (Series 20000). 133
THIS MIXER’S A MAINTENANCE Nettco Side Drive Mixers are now available with mechanical shaft seals of unsurpassed lasting qualities. T h e Nettco design permits seal inspection or service under full pressure without draining storage tanks or other timeconsuming preparations. The seal service operation is simple, quick, inexpensive. If repair parts are not available, the complete assembly can be replaced by a conventional stuffing box. Olzly Nettco offers this feature! Nettco Side Drive Mixers with the “maintenance-miser” seal are available in 34 to 30 HP sizes.. in many arrangements and alloys to suit specific job requirements. Next time check Nettco -for prices and recommendations. New England Tank & Tower Co., 8 3 Tileston Street, Everett 49, Massachusetts.
.. .
TIMERS. 5 pages. Brochure gives information on standard line of electronic timers-including delay, repeat cycle, and interval timers-manufactured by G. C. Wilson & Co. 134
TIMERS, CYCLING. 8 pages. Bulletin catalogs line of program, percentage, and pulse timers designed t o repeat a definite time cycle or sequence continuously. The R . W. Cramer Co. Inc. (Bull. 135 PB-510).
Mechonicol seal isolated from tank prersJre by secondary shut-off collar 1. with seal parts 2. exposed for inspection.
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Send for n e w Side Drive Bulletin #532.
SERVICES COMPUTER FACILITIES. 16 pages. Brochure describes computational facilities and code library available for handling various types of calculations and analyses a t Midwest Research Institute. 138 ’
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W
VISCOMETERS. 12 pages. Bulletin discusses basic concepts of viscosity and flow and describes Swiss-made viscometers and process control instruments for use a t extremes of pressure, viscosity, and temperature. Drage Products. 137
1
U
Seal in open position with split flange coupling removed for repoir or replacement of seal parts 2.
E N G I N E E R E D
TITRATION EQUIPMENT. 16 pa es Bulletin describes and illustrates feal tures and applications of instruments for potentiometric, conductometric, and amperometric titration. Fisher Scientific Co. (Bull. FS-247). 136
A G I T A T I O N
INDUSTRIAL SURVEY OF TENNESSEE.
28 pages. Brochure describes and illustrates advantages of Tennessee as a lant location. Tennessee Industrial a n 8 Agricultural Commission. 139
PLATE FABRICATION. 12 pages. Bulletin illustrates and describes facilities and operations of company in steel and alloy plate fabrication work. Downington Iron Works, Inc. (Bull. P P ) . 140
For further information, circle number 128 A on Readers’ Service Card, page 129 A
128 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
Inquiry Card Page 129 A Vol. 47, No. 6
