Product Review New digital iine tracer
New liquid end for diaphragm metering pumps of flow. Formation of gas, in the case of sodium hypochlorite is attributed to the de crease in the stability of the chemical solu tion. ProMinent Fluid Controls has intro
duced a new liquid end which automatically vents gas bubbles. If a gas bubble forms, a special bleed valve in the self-deaerating pumps opens at low pressure to allow the gas to be evacuated on each discharge stroke. The bleed valve closes at high pressure, as when fluid is present, causing the fluid to be discharged out of the pump's discharge valve.
Geneq Inc., representing Fisher Research Laboratory, is introducing a new digital depth-reading line tracer - the TW-770. It will combine state-of-the-art digital signal processing with Fisher time-tested, turn-onand-go technology to offer a fast, accurate and easy way to locate underground pipes and cables.
Other than a turn-on switch, a single button controls all functions of the TW-770.
When this button is pushed, a numerical readout of line depth appears on the TW770's large liquid crystal display (LCD). When the button is not pushed, the LCD
gives a continuous numerical readout of sig nal strength. The operator is guided over the buried line by left/right arrows that ap pear on the LCD and by an audible left/right signal. Automatic gain control eliminates the need for manual adjustments. Geneq Inc. For more information,
Circle reply card No. 155
Ultrasonic level transducers
It is difficult to dose gassing liquid chemi cals using positive displacement diaphragm metering pumps. If gas bubbles form, this can interrupt delivery and reduce dosing quality. Many fluids, such as sodium hypo chlorite or hydrogen peroxide, out-gas as they are drawn into the suction line of a metering pump. The gas accumulates in the liquid end and is compressed with each dis charge stroke, causing vapour lock and loss
Milltronics new Echomax™ Series trans
measurement into applications that were not previously viable. Echomax™ transducers increase the op
erating temperature to 150° C, while main taining temperature stability over the range. 90
ProMinent Fluid Controls
For more information, Circle reply card No. 156
A more powerful signal output and improved echo sensitivity mean that applications are possible in more dusty and steamy environ
tains 7,000 BTU/lb, producing less than 4%
ments. Materials and methods of construc
remove oil from water surfaces and leave
tion improve immunity to harsh chemicals and expand mounting options. The new transducers can be applied to applications where high temperatures are
them clean, with no sheen.
ash.
Socks and booms containing Cell-U-Sorb
ADDCO Industrial Absorbents
For more information.
Circle reply card No. 159
encountered, such as clinker, food process
ing, steam cleaning, chemical processing, and pulp and paper. Milltronics
Recycling lamp ballasts
For more information,
Circle reply card No. 157
Powder coating technique Automatic Coatings Limited has developed Specification AC-70-GO1, a powder coat ing technique to combine the superior cor rosion protection properties of 3M's Scotchkote family of epoxy resins with an integrated top coat of polyester resin. The .system provides users with a wide choice of colours for the polyester top coat, while, at the same time, offering excellent ultra violet protection to weathering. The base epoxy film thickness can be tailored to meet other specifications up to 25 mils. A complete list of chemical resist ance properties is available. Automatic Coating For more information. Circle reply card No. 158
100% cellulose absorbent ducers extend the use of ultrasonic level
This allows the pump to self-prime against the pump's rated back pressure, so you no longer have to relieve pressure on the discharge line to get it primed. Bleed ing by manually slackening the pressure line is no longer necessary. The new liquid end is available in Plexiglass or PVC and can be retrofitted on Gamma/4 pumps without difficulty.
Cell-U-Sorb® absorbs up to an average of 12 times its weight in hydrocarbons, depend
ing on viscosity. Cell-U-Sorb is 100% cel lulose, is produced from recycled raw ma terial, and is recyclable as a waste-derived fuel for energy recovery in a permitted ce ment kiln. In its raw state, the product con
PROECO Corporation, in affiliation with Custom Environmental Services, operates the first, fully-approved facility under the Alberta Environmental Protection and
Enhancement Act, which is licensed to im
port and recycle PCB lamp ballasts. All processing is carried out at Custom Environmental Services facilities in Edmon
ton, removing on-site client liability and providing complete due diligence which is now required by legislation. PROECO Corporation For more information. Circle reply card No. 160
Environmental Science & Engineering, July 1995