EQUIPMENT
CHEMICAL PUMP Continuous or Intermittent Service Handled By ECO GEAR-CHEM* Pump. 9jf Jfausi ftAaoe&i* de*na+u&&: Continuous or Cyclic Wet or Dry Operation Ss&Priming Chorsdsnstics Full or Restricted Flows Linear & Reproducible Flows Metering Accuracy Reversible Operation Freedom from Contamination Temperature, Viscosity & Pressure Changes
Specify j£Ae ECO CARBON GEAR-CHEM-
Viscosities to 5000 SSU · Temperatures to 4 5 0 F.
Carbon spur gears are fully machined and g r o u n d , dimensionally stable and resistant to mechanical and t h e m i a l shock. Chemically unaffected b y a wide range of corrosive media, carbon gears efficiently handle lubricating and non-lubricating fluids. Pump can be steam or chemically sterilized* Self-lubricating carbon bearings eliminate all problems of product contamination· T h e carbon gear pump i s available in 2 sizes: t o 2 . 5 g p m at 1 0 0 psi at 1 7 5 0 rpm and to 10.0 gpm at 1 0 0 psi at 1 7 5 0 rpm. P u m p housings and shafts of T y p e 3 1 6 or Carpenter 2 0 stainless steel, nickel or Hastelloy C . X^rite f o r complete data and state y o u r requirements for immediate attention. ^Registered Trade Mark
ECO MArket 4 - 6 5 6 5 82
C&EN
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2 2,
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ENGINEERING CO. . 12 NEW YORK ÀVEw N E W A R K , N . J ;:.
Analyzer Seen at Show M i l t o n Roy exhibits low-cost colorîmetrïc a n a l y z e r t h a t has no moving parts xTL NEW automatic colorimetric analyzer met the public at last week's Instrument Society of American instmment-automation exhibit in Philadelphia as Milton Roy showed off its Chemalyzer. Low in cost, t h e unit has no moving parts, is powered entirely by the gravity head of the sample. Chemalyzer, says Milton Roy, can be used to monitor chemical properties such as pH, residual chlorine, water hardness, phosphate, a n d hydrazine or iron content in water solutions. It can also be used for titration control around a fixed end point. Although less precise than some colorimetric analyzers ( which can measure within a few parts per billion), the new unit is accurate enough for normal plant sampling, the company points out. It will get to within 2 to or/< of the reading. And it costs less than $350. It's easy, says Milton Roy, to watch all phases of the operation since the Chemalyzer is made almost entirely of transparent acrylic resin. Here's what happens: Sample liquid enters a reservoir at the top of the unit, where an overflow tube holds the level constant. From the reservoir, sample flows by gravity through an adjustable orifice to a sample metering chamber, where it slowly rises to the top of a siphon tube. As soon as this point is reached, the entire contents of the metering chamber ( 19 ml.) discharge b y siphon action into a reaction chamber below. Flow rate through the orifice, explains Milton Roy, determines the instrument's testing rate, can be regulated to automatically run from four to 6 0 reactions per hour. AVhilo the metering chamber is filling with sample, colorimetric reagent flows from a reagent reservoir into the reaction chamber. T h e standard reservoir, says Milton Roy, holds enough reagent for one day's operation, but special reservoirs can be added to increase the capacity. Reagent flows to the reaction chamber through a mariotte tube, set to admit exactly 3 ml. of reagent to the chamber each cycle. The sample siphoning down mixes with reagent, and the combined volume rises over
EQUIPMENT
t h e t o p of a second siphon. This dischargees t h e entire mixture into the Iight€*d optical cell below, where color caw lie observed a n d c o m p a r e d with color standards. An optional photocell u n i t can b e connected t o t h e optical cell. s a \ s Milton Roy, to monitor color c h a n g e and actuate either an alarm or mn osi-ofï control system. Sample a n d reagent a d d up to 2 2 ml. b u t t h e volume of the optical cell is only S ml. T i m s the optical cell is first flushed out with almost t w i c e its volu m e before retaining t h e last portion o f t h e mixture. And although the cell is never e m p t y and each sample has t r a c e s of the previous sample in it. the a m o u n t is slight and causes no problem, Milton Roy claims. Chemalyzer was developed in Belg i u m by Paul Baldwin and Silvere C o u v i e r of Interindustrie Soc. Coop. M i l t o n Roy caught sight of t h e unit at last June's Àchema show, got hold o* A m e r i c a n a n d Japanese manufacturing a n d distribution rights. Milton Roy's F l o r i d a Instrument Co. division makes t h e instrument.
is designed for producing high p u r i t y semiconductors a n d metals. It will h a n d l e q u a r t z protection tubes lap t o 35-mm. o.cL a n d t o p a n d bottom lioiders can b e adjusted in b o t h horizontal and vertical directions. A method for water cooling permits u s e t»f a single*wall t u b e , thus keeps spacing small be*tween work coil a n d work to give efficient operation, according to tlie c o m pany. Ε S • N e w s u p e r s p e e d c e n t r i f u g e , by I v a n Sorvall, Norwalk, Conn., has a control panel that lifts out from the basic i n strument housing for remote operation. T h e unit will a c c o m m o d a t e several dif ferent rotors: SS-34 ai iodized chiralumin rotor (forces up to 34,800 G ) , CSV rotor (holds u p to 17TO nib . a n d
t h e Serval] particle c o u n t i n g rotor. T h e unit can also be a d a p t e d for con t i n u o u s flow operation» a n d it h a s a S e n a l l Noisuppressor to eliminate n e a r l y all centrifuging sounds. 16
Processing • C o n v e y o r b e l t of Teflon-coated glass fabric is now b e i n g m a d e b y H . K. Porter's Quaker R u b b e r division» Phila d e l p h i a . It is especially suitable for sticky operations that involve h e a t seal i n g b a r s o n packaging e q u i p m e n t , h a n d sealing irons, a n d sealing plates. In g e n e r a l , says t h e c o m p a n y , sticky, resinous, or moist materials d o n ' t ad h e r e t o t h e belt. I 7 {Continued
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123)
September 2 2 , Î 9 5 8
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• New pressure-sensitive masking t a p e , by Permacel, N e w Brunswick, N . J . , can withstand up to 450° F.— e v e n when b a k e d for several hour-long c y c l e s , the company says. And, adds P e r m a c e l , t h e tape won't shrink or curl w h i l e baking. Ε2 • Q u a r t z m i c r o t u b i n g will be produced b y M o n s a n t o , St. Louis, in a diameter o f 0.€03 in. T h e t u b i n g , tentatively c a l l e d Santotube Q, was originally de v e l o p e d in fiber form for A E C . Mon santo* expects the tubing t o find indus trial use in Bell Laboratories* helium recovery process (C&EN, July 2 1 , p a g e 64). E3
Every w e e k C&EN's editors survey a l a r g e volume of valuable scientific, technical, a n d business information issued in the form of product announcements, booklets, c a t a l o g s , d a t a sheets, etc. This m a t e r i a l is digested a n d presented m several departments. For your convenience this coupon is provided to facilitate requests for further information en these items asvrell a s on products and services mentioned in advertisements. . Position-
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L a b Ware · · . • G a s - o x y g e n b e n c h b t ^ n e r for gen e r a l p u r p o s e use has been developed by B e t h l e h e m A p p a r a t u s , Heller town, Pa. T h e b u r n e r , says Bethlehem, works 100m m . hard glass at city gas pressure ( 1 A p.s.i. ), has two fuel inlets rather tiian four, a n d has a self-locking gear a n d friction swivel for h e i g h t adjust m e n t . It can also b e used for heat t r e a t i n g metal parts a n d annealing, the c o m p a n y says. Ε4 • Lincâberg v e r t i c a l f l o a t i n g z o n e scann e r , b y L i n d b e r g Engineering, Chicago,
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