Abrasive Disks Rex-Cut Products Inc. Fall River, Mass.

A new line of long-lasting, quick- change cotton fiber disks for one-step blending and surface conditioning is being introduced by Rex-Cut Products Inc. Rex-Cut Cotton Fiber Quick Change Disks feature multiple layers of reinforced nonwoven cotton that is impregnated with abrasive grains, pressed, bonded together, and then mounted with 3M Roloc style ‘Ijpe III

fasteners. Constantly exposing fresh abrasives as they finish, the quick- change disks run cool, are nonloading, and last up to 25 times longer than conventional nylon disks. Simple to mount, Rex-Cut Cotton Fiber Quick Change Disks are the first cotton fiber products to employ the twist on/off fastener. Producing a fine finish, they are available in l-, 1Yz-, 2-, and 3-in. sixes with silicon carbide and alumi- num oxide abrasives in 24 to 320 grit types and flexible or medium bonds for handling flat and contoured surfaces requiring different stock removal rates.

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Evaporator BFGoodn’ch Cleveland

A new atmospheric evaporator for chromic acid service, made entirely from Corzan CPVC (post-chlorinated polyvinyl chloride), allows metal-fin- ishing plant design engineers to achieve superior performance, im- prove product quality, and realize dra- matic savings in equipment costs. By collecting the chromium, reusing it,

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and then evaporating the wastewater, the unit eliminates the need for waste- water treatment and allows the concen- trated chromium to be reused. The evaporator operates at temperatures up to 150’F. A 30% chromium process solution with a pH of 1 is pumped to the top of the cylinder through spray nozzles and flows downward through the tower packing back to the storage tank. Simultaneously, air is blown up- ward from the bottom to the top of the cylinder and is saturated with water vapor. A demister at the top of the tower retains the large water droplets still contained in the exhaust air. Be- cause of the evaporation of the process

solution, the chromium becomes con- centrated and can be recycled and then removed. It is designed to effectively handle high temperatures and aggms- sive chemicals at a cost advantage.

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Cleaning and Degreasing Prod- ucts Detrex Corp. Bowling Green, Ky

The new line of Aquavert aqueous and semiaqueous industrial cleaning/ degreasing products is now available from the Environmental, Cleaning, and Equipment Systems Div. of Detrex

METAL FINISHING . SEPTEMBER 1995 81

Chemie Linz Fine Chemicals:

Applications in surface finishing, electroplating, process adjuncts, intermediates for related compounds

omv Chemie, Linz OMV Chemie Linz North America Inc. 65 Challen er Road Rid efield Park NJ 07660 & S A TAI.: &I, 641 64 10 Fax: (2Oli 6il.23’ 23

Chemie Linz GmbH, St. Peter-StraRe 25, A-4021 Linz/Austria Tel. ++43 (70) 59163279 Fax ++43 170) 59163739

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Corp. Six different formulations are available, and all are economical, en- vironmentally friendly alternatives to CFC and other hazardous solvent- based cleaning chemicals. Formulated for a variety of cleaning applications, Aquavert products serve as replace- ments for chlorinated or fluorinated chemicals used in vapor degreasing. All products are safe to use, economi- cal, and are tailored to various cleaning conditions and substrates.

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Thermal Oxidizer E Products Inc. Vadnas Heights, Minn.

E Products Inc. has announced the availability of its new generation of Venturi thermal oxidizers and ground flares that increase oxidation rates of a wider range of contaminants while cut- ting fuel costs by approximately 30%. At the core of this new thermal oxi- dizer design is the E Products Venturi Burner, which optimizes the mixture of fuel, combustion air, and fume stream, resulting in complete combustion. To maximize contaminant destruction ef-

ficiency, the fume stream can be intro- duced to the burner as either fuel or combustion air, depending on lower explosive limit (LEL) concentrations. This unique design allows the thermal oxidizers and enclosed ground flares to operate above, below, and through the LEL-without an LEL monitor. Op- tional heat recovery, as high as 90%, further emphasizes the design efficien- cies of E Products thermal oxidizers.

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Conductivity Measurement Sys- tem George Fischer Inc. Win, CaM.

Precise control of conductivity, tem- perature, and percent rejection in a wide range of applications is offered by the Signet Conductivity Measure- ment System. Featuring the modular design and easy-function programming of the popular Intelek-Pro series of controllers, the conductivity measure- ment system includes well-known in- sertion sensor technology, which takes the guesswork out of process measure- ment. The microprocessor-based, dual- channel Signet 9050 Conductivity Controller provides for two indepen- dent sensor inputs with temperature

compensation. Plug-in circuit cards are used to interchange outputs to a spe- cific system configuration as well as add control functions as system re- quirements increase. Field-config- urable output options include up to four 5-A relays for on/off alarm or proportional pulse operation, and one or two analog outputs of 4-20 mA, O-20 mA, O-5 VDC, and O-10 VDC. All functions are accessed and pro- grammed from the front panel. A menu-driven program guides the oper- ator through calibration and setpoint adjustment. The controller’s case has been thoroughly tested at enviromnen- tal extremes while maintaining a NEMA 4X rating for both indoor and outdoor applications.

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82 METAL FlNlSHlNG . SEPTEMBER 1995