A Monthly Series by Carl Tylka, Vanton Pump Technical Service Director
Straight talk on
Pumping Muriatic Acid Old-time process engineers used to shudder at the thought of pumping muriatic (hydrochloric) acid. This highly corrosive acid, as is well known, attacks most metals and packing materials, so that before the advent of Van ton Pump's unique sealless design, it presented a chronic and annoying pumping problem. Two standard solutions were available in those days, neither of them completely satisfactory: one, rubber pumps, of conventional design, and with the usual seal problems; the other, pumps made of Hastelloy C, a special corrosion-resistant alloy, with special seals. This was extremely expensive, as these small-capacity pumps often cost consider able sums. A Vanton sealless plastic pump now does the same job, without shaft seals, leakage, or mainten ance problems—at one tenth the pump cost! Vanton's solution is a combination of two new
ideas: new materials, plastics, that resist attack by almost any corrosive material going; and a radically new design, that eliminates shaft seal problems by simply eliminating shaft seals! Van ton sealless plastic pumps are now in use in factories throughout the nation, handling everything from sulfuric acid and hypochlorite bleach to abrasive slurries and contamination-sensitive solutions as well. No matter what your corrosion, abrasion, or con tamination-sensitive pumping problem may be, you deserve to take a look at what Van ton's combination of new design and new plastic materials can do for you.Write for descriptive literature to Van ton Pump & Eqpt. Div., Cooper Alloy Corp., Hillside, N . J. Vanton Pump and Equipment Division
COOPER
ALLOY
Corporation · Hillside, New Jersey
Circle No. 17 on Readers' Service Card
PHOTOVOLT
Electronic
p H METERS
A complete line of pH meters Incorporating modern electronic tubes and circuits, simple in operation and maintenance, featuring sealed amplifier plug-In units.
Line-Operated Model 85 • Single range 0-14, scale length 3 " , readable to 0.1 pH unit. • Fully stabilized, simple, compact, available with carrying case. • A full-fledged pH meter usable with all types of electrodes. Write for Bulletin #195
$115.
Line-Operated Model 115 • Single range 0-14, scale length 4 " , readable to 0.05 pH unit. • Temperature control 20-60°C, available with carrying case. ':'·'-' Additional millivolt scale for redox measurements and titrations. Write for Bulletin #225
$145.—
Line-Operated Model 110 "·,· Single range 0-14, scale length 7 " , readable to 0.02 pH unit. • Temperature control 0-100°C, voltage selector for 80-260 volts. ·.".·'; Available with carrying cover & baseboard for bottles, beakers. Write for Bulletin #105
$215.
Battery-Operated Model 125 • Single range 0-14, scale length 5Vi", readable to 0.03 pH unit. • Only 3 batteries, standard radio type, 2,000 hours of service. • Available with carrying frame for instrument, beakers, bottles. Write for Bulletin # 1 1 8
$175.
Alflprices include set of glass electrode ond calomel electrode, or combination glass-and-calomel electrode AJprobeJ.'^V,
See also Bulletin # 738 on pH Meier Tester Mod. 25 for checking the performance of pH meters without electrodes or buffers, applicable to pH meters of any make.
MODEL 115
PHOTOVOLT
C O R P O R A T I O N 95 M A D I S O N AVENUE. N. Y. 16. Ν. Υ.
Circle Nos. 49-1, 49-2, 49-3, 49-4, 49-5 on Readers' Service Card
128 A
INDUSTRIAL AND ENGINEERING CHEMISTRY
$58.
