EQUIPMENT
Dow Introduces Penton-Lined Equipment Valves, pipe, fittings, and pumps result from three-year development program Dow Chemical has introduced pipe and fittings lined with extruded Penton chlorinated polyether. The equipment, which Dow calls Pentherm, includes valves and pumps, and will complement Dow's saran-lined pipe and extend temperature limits to 280° F. for some systems. Like the saran line, Pentherm is made of a preformed, extruded liner that is anchored under pressure inside the pipe. The screwed flange pipe can thus be cut to fit, where it is being used in the field. The extruded Penton liners are 5/-.)2 to % 2 in- thick. This gives them an extra margin over coated pipes—which normally run about 30 mils—for corrosive and abrasive systems at high temperatures, Dow says. Penton resin is being supplied by Hercules Powder. According to George M. Taylor, Penton product supervisor for Hercules Powder, the heavy extruded liners of the Dow line round out the types of Penton systems available throughout the country. Several manufacturers now make pumps and valves coated with Penton or having solid Penton parts. Hercules lists manufacturers who coat large vessels with sprayed resin or with adhered sheet. Solid Penton pipe and fittings are available, as are the pipe and fittings made with 30-mil coatings. Commercial introduction of the Pentherm line follows almost three years of field tests in which pipe and fittings were supplied on an experimental basis. One example is Union Carbide Chemical's Whiting, Ind., plant. Carbide was using 6-in. lead-lined pipe to transfer 45 Vc sulfuric acid at 45 p.s.i.g. and 176° F. Leaks, caused by erosion and corrosion were causing frequent shutdowns. In addition, the process was hazardous to operate. Early in 1958, Carbide installed two Penton-lined diaphragm valves made by Hills-McCanna. Then it added a Penton-lined spool piece in 1960. Since then it has been placing 4-in. 52
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Pentherm equipment in the system gradually. Plant manager M. C. Leavitt expects eventually to have Penton-lined pipe for more than half the piping. So far, Carbide's maintenance costs are down by half in areas where the Penton equipment is being used. Operating time between shutdowns has increased, and the lighter, Pentonlined pipe costs less to install. Because the liner doesn't have to be as thick as lead, a 4-in. pipe can replace a lead pipe of 6 in. When the Pentonlined piping installation is complete, Mr. Leavitt estimates it will save $33,000 annually. Dow lists as other applications of its Pentherm piping, systems carrying calcium chloride brine containing free HC1 at 280° F. and 75 p.s.i.; 70% H F at 100° to 179° F.; a system carrying 40 Vc sulfuric acid, chlorinated aromatics, and 15Vc abrasive solids at 220° F.; and an ammonium chloride production system operating from 200 c to 240° F. Dow will sell its Pentherm line at about the same price as stainless steel. Installation costs should be less though, because the pipe can be cut to fit in the field, and flanges don't have to be welded, Dow says. Pipe sizes available range from 2 to 8 in. The Pentherm line will be distributed through the Saran Lined Pipe Co., Ferndale, Mich. E1
Precision, low-flow control for liquids and gases is being marketed by Lockwood & McLorie, Inc., Horsham, Pa. The device is a micrometer screw attachment for a Foxboro adjustable restrictor. The unit is applicable to chromatographic analyzers and other analytical instruments wherever precise control of low flows' is essential, the company says. E3
Radiography unit that can be used for directional or panoramic industrial inspection is available from Picker X-Ray Corp., White Plains, N.Y. The Tech Ops Model 520 is a mobile 150curie cobalt unit. It's described as ideal for production radiography of heavy sections in foundries and steel factories. E4
High-vacuum, bell-jar evaporator from Vacuum Specialties, Somerville, Mass., can double as an environmental chamber. The Model VSC-20 evaporator is designed primarily for thin film deposition in the electronics, optics, and semiconductor fields. It can also be used as a basic chamber and pumping system for a variety of operations requiring clean, repeatable vacuums in the 1 0 6 mm. range. As an environmental chamber, for example, this unit can simulate altitudes to 120 miles, has provisions for heating, and high voltages for ionization effects, according to the company. E5
BRIEFS
Metal detector that finds and then rejects tablets, pills, or capsules which contain minute amounts of metal particles is available from Arthur Colton Co., Detroit, Mich. The quality control instrument will handle tablets up to 5 / 8 in. in diameter, and will inspect at the rate of 4800 tablets per min., the company says. E6
Pressure filters for removing silt from cooling water, trace contaminants from process water, and for clarifying drinking water are available from Hagan Chemicals & Controls, Inc., Pittsburgh, Pa. Available in 11 standard sizes, the filters can be mounted singly or in a multiple installation for high flow rates. The filters are the polishing type, and can remove suspended particles as small as 1 micron, according to the company. E2
Electrophoresis apparatus that uses special multiple organic buffers and provides visual observation of migration by means of tracer dyes, is available from Kensington Scientific Corp., Berkeley, Calif. The company claims that rapid separations of chemical and biological substances are achieved economically, completely, and with minimum supervision. E7
pH meter that has a 500-mv. scale and a full-range shock-resistant combina tion electrode is being marketed by The Meaker Co., Nutley, N.J. The Electrion II line-operated portable meter has high stability and gives Ε8 reproducible readings.
Plasma arc generator that can make refractory particle spheres ranging in size from 100 to 150 microns is avail able from Plasmadyne Corp., Santa Ana, Calif. The generator has four basic elements : a powder feed mecha nism, an adjustable dual electrode plasma torch, a quenching chamber, and a gas-solids separator. The sys tem is able to process over 10 lb. of refractory powder per hour. Accord ing to the manufacturers, the spheroidizing process can be used for filter
ing devices, material compaction and sintering, and the production of freeflowing powders. Ε9 Cartridge heaters from Heatrex, Inc., Meadville, Pa., are designed for re quirements to 600° F., although spe cial units can be supplied for tem peratures up to 1100° F. The heaters can carry from 75 to 1000 watts, and rapid heat transfer is possible by direct contact with the material being heated. Heaters are available for receptacle hole diameters from 3 / 8 in. to l V i e in., and are up to S1/2 in. long. Ε 10 Further useful information on keyed Equipment items men tioned is readily available . . .
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Sometimes it's better to let Eastman m a k e it Got a production problem? Does it involve the manu facture of a compound that's not generally avail able in the quantity or pu rity you require? Then con sider this. We are equipped for and experienced in synthesis on a custom basis for quantities in the largerthan-laboratory-but-lessthan-tankcar range. For in formation about this serv ice, or a quotation, write Distillation Products Indus tries, Eastman O r g a n i c Chemicals \ Department, Rochester 3, Ν . Υ.
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