Liquid Temperature-Control Equipment.

PRODUCT LINES REVIEWED

ADVANTAGE ENGINEERING, INC.

Fluid-circulating equipment for molding, extrusion, and thermoforming includes portable chillers and plantwide central systems. Portable chillers from 1- to 30-ton capacity in air- and water-condensed designs. Central chillers from 10 to 500 tons in air- and water-condensed outdoor and indoor systems.

Water- and oil-circulating mold-temperature controllers. Water units operate between 30 F and 250 F. Oil units operate between 100 F and 500 F.

Cooling-tower systems from 20- to 1000-ton capacity. Metal and fiberglass tower cells. Open- and closed-loop designs standard. Engineering services included with central cooling systems. Equipment can be computer-connected for remote control, information collection, and data storage.

AEC/APPLICATION ENGINEERING

TrueTemp water-temperature control units with 3/4- to 10-hp pumps and standard stainless-steel sheath heater selection from 9 to 24 kw. Off-the-shelf microprocessor control with easy-to-read LED, dual display of setpoint and process temperature, optional SPI communication protocol, and full-feature graphic display panel. Low-profile cabinet designed for stacking and easy maintenance. Standard options include VacuFlow negative/positive pressure units, system water purge, modulating cooling valve, and closed-loop heat exchanger.

TDW-M "mini" TrueTemp series features small footprint and serviceable two-piece cabinet design with hinged electrical panel and operator interface. Compact 9- and 12-kw direct-injection water units include field-proven off-the-shelf microprocessor controls with graphic panel and easy-to-read display. "Crash Cool" feature accelerates process cooldown. Optional motorized modulating valve gives high accuracy under varying loads and helps reduce water hammer.

TDH TrueTemp hot-oil unit designed for high-temperature heating and cooling applications from 100-550 F. Self-contained units offer optional U-type heat exchanger that withstands thermal shock. Standard off-the-shelf microprocessor temperature control accurate to 1[degrees] F.

Portable air- and water-cooled chillers from 1/2 to 40 tons. Ultra-compact PS series air- and water-cooled chillers from 2 tons have off-the-shelf fuzzy logic microprocessor controls, scroll compressors, and brazed-plate evaporators.

Versatile Glacier series chiller line in air- and water-cooled models from 5 to 40 tons. Serviceable cabinet design and 40-gal noncorrosive polyethylene reservoir. Standard off-the-shelf microprocessor controls accurate to [+ or -]1[degrees] F with dual LED display of setpoint and supply temperature. On 15-ton units and larger, Discus compressors are standard to help optimize energy efficiency.

Air- and water-cooled central chillers wit or without integral pump tank. One-, two, or three-circuit configurations from 10 to 180 tons. DDW series direct-drive central chillers in models from 40 to 150 tons. Units have open compressors and use 15-20% less energy at 100% load compared with chillers having semi-hermetic compressors.

Pinnacle series small-footprint central chilling stations use scroll compressors, brazed plate evaporators, and an integral stainless-steel reservoir. PLC controller with color touchscreen interface displays operating conditions and diagnostics. Units available with two or three independent refrigeration circuits from 30 to 90 tons in water- or remote air-cooled versions.

BFC series air coolers provide air-ring cooling at constant temperature, pressure, and volume. Available up to 5000 cfm. Cooling-tower systems for condenser and molding machine hydraulics come in Polymer Tower forced-draft and fiberglass induced-draft models from 50 to 200 tons. (See ad p. 249.)

AFFINITY INDUSTRIES INC.

Compact, high-capacity chillers with standard remote control. Units from 10,000 to 156,000 Btu/hr achieve [+ or -]1[degrees] F stability and give unrestricted access to all components. Nonferrous coolant loop, no-flow and low-level alarms, hot-gas bypass for long compressor life, high/low-temperature alarms, and high-capacity heat exchanger for high heat-transfer efficiency. Digital-readout (C/F) microprocessor is programmable and autotuning. Units typically 30% smaller than other chillers.

ALPHA MARATHON TECHNOLOGIES INC.

Portable, self-contained air-cooling units for blown film production. Capacities from 500 to 1500 cfm, it can be readily added to any existing air ring to improve bubble cooling. Large-surface cooling coils cool air. Propeller drives have permanently lubricated bearings. Customized designs available.

AMCOT COOLING TOWER CO.

Counterflow and crossflow induced draft-fiberglass constructed cooling towers with galvanized or stainless-steel component options and standard stainless-steel fasteners. Counterflow units are bottle-shaped to maximize air flow regardless of placement. Design also minimizes fan hp, allowing for smaller-sized motors and less electrical consumption. Units range from 5 to 1500 tons with modular capabilities that save space and simplify cooling tower expansion. Options, upgrades and accessories available.

AMERICAN HYDROTHERM CORP.

Roll-heating and cooling control systems use high-temperature water and heat-transfer oils for temperatures from 200 to 700 F. Heat sources include steam, electric heaters, and fuel-fired heaters.

AMERICAN INTERNATIONAL ELECTRIC

Automatic mold-temperature controllers offer portability, automatic alarming device, high-precision temperature control, stainless-steel storage tank, and transparent water/oil level glass.

APPLICATION ENGINEERING

See ARC/Application Engineering.

APPLIED PROCESS EQUIPMENT

Water-chilling, water-cooling, water-recovery, and water-filtration systems include portable, central, and heat-pump chillers in water- or air-cooled versions. Open and closed central cooling-tower systems. Closed systems available with plate-and-frame stainless heat exchangers. All systems come with complete engineering drawings and warranty for a full year on parts and labor.

ARCTICHILL, INC.

Chillers and modular chilled-water systems range from 1- to 60-ton capacity with indoor and outdoor, air- and water-cooled models. Options include open, closed, vertical, and horizontal systems.

Cooling towers in sizes from 5- to 1000-ton capacity are built from FRP materials with PVC filler and piping. Specializes in developing complete systems.

BALTIMORE AIRCOIL CO.

Evaporative-cooling equipment includes cooling towers in crossflow and counterflow configuration, with factory-assembled modular units to 2110 tons/32 million Btu/hr. Evaporative condensers, closed-circuit cooling towers, heat exchangers, thermal-storage units, and microbiological controls also available.

Factory-assembled equipment available in hot-dipped galvanized steel, fiberglass, or stainless steel. Heat exchangers in shell-and-tube configurations. Microbiological control employs iodine to control growth of bacteria, slime, and algae. ISO-9000 certified.

LOUIS P. BATSON INC.

Full range of mold-temperature controllers, portable chillers, pump-tank stations and cooling tower systems. All equipment is user and maintenance friendly. Systems feature "plug-n-go" capability requiring only power and water connections.

BERG CHILLING SYSTEMS INC.

Cooling equipment includes central systems with semi-hermetic open drive or screw compressor; air-cooled units with heat recovery; water-cooled units with "free cooling"; clean-water tower systems; prepackaged mezzanine systems; portable chillers; blown-film coolers; temperature-control units; chemical-treatment packages; mold-area dehumidifiers; and water-filtration systems.

Noncorrosive fiberglass towers feature low-hp motors and structural-steel bases.

BUDZAR INDUSTRIES, INC.

Hot-water and hot-oil systems; negative-pressure hot-oil and hot-water systems; air- and water-cooled portable, self-contained, and central chillers; cooling towers; and pump-tank sets.

Hot-water units in steam or electric heating, direct or closed-loop cooling, portable or stationary in single and multi-zone configurations from 50-300 F.

Hot-oil units, portable or stationary, ranging in single and multizone configurations from 350, 450, 550 or 650 F.

Negative-pressure hot-oil or hot-water units incorporate an on-board vacuum pump to generate a controlled and reliable negative pressure. Design allows for adjustment of negative pressure as needed. Molds can be evacuated of all hot oil or hot water prior to changeout. Negative pressure units can be filled from fluid source using vacuum pumps.

Air- and water-cooled chillers, portable and self-contained, with refrigeration and water circuits piped and wired, 3 to 80 tons.

Central chillers have dual-refrigeration circuits, easily serviceable components and full unit frames for component protection. Range from 5 to 400 tons for both air-and water-cooled systems.

Cooling towers in standard galvanized and FR? configurations, 10 to 400 tons.

Pump-tank assemblies, sized to flow requirements of each chiller or cooling tower. Features include tank covers, pre-wired electrical enclosures and alarms, as well as optional standby pumps and custom configurations.

BURGER ENGINEERING, INC.

Mold-temperature regulators control mold temperature without use of electricity by throttling back or allowing water flow through the mold to control water temperature through the mold between 80 F and 120 F. Connection sizes are 1/2-in NPT(F) outlet and 1/4-in. NPT(F) inlet. Differential pressure of 10 psi is required.

Aluminum, stainless steel, or fiberglass-reinforced nylon cooling-water manifolds route water to control temperature at the mold. Sizes from 3/4 through 2 in. supply with any number of ports from 1/8- through 1-in. NPT(F) and integral mounting holes. Aluminum manifolds are color-coded for line function identification. Red manifolds denote return water lines and blue manifolds supply water.

Mechanical flowmeters with pressure and temperature gauges that provide diagnostic information come in sizes from 1/4- to 2-in. NPT(F) and 1.5 through 100 gal/min. Dual-scale temperature/pressure gauges exceed flowmeter maximum operating specifications of 240 F and 100 psi.

CHROMALOX EMERSON ELECTRIC CO.

Stock and pre-engineered microTherm CMX mold-temperature control units ensure precise and compact control of water temperatures from 50 to 250 F. Designed for injection and extrusion applications, the system consists of three major components:

1) Custom-cast heat/cool chamber assembly has two chambers for integrated water temperature control capabilities. Corrosion-resistant Incoloy sheath elements provide heat input to 24 kw. Open-and closed-loop cooling options.

2) High-performance, vertical-mounted centrifugal pump with flow rates from 30 to 80 gpm. Pump housing flange provides virtually seamless coupling with heating/cooling chambers.

3) Touch-panel operator console incorporates 2104 digital microprocessor-based temperature controller with separate PID algorithms for heat/cool modes and dual setpoint and process displays, process pressure gauges to monitor "to and from" process pressures, plus pump switch and diagnostic indicators.

Modular hydraulics (heat pump/ chamber) and fastener-free cabinet provides ease of service and trims downtime.

CITO PRODUCTS INC.

MoldMonitor pulsed-cooling temperature-control system consists of a single-or multiple-zone controller, heat sensor, and solenoid valves, Unit divides a mold into zones depending on the geometry of the mold and the distribution of heat load. It places a high-resolution thermistor sensor within 0.100 to 0.500 in. of the part surface to sense temperature increase as plastic enters the mold. The unit's microprocessor uses this information to start and stop a burst of cold water right after the mold has been filled. The pulse of water is triggered by the hot melt raising the cavity temperature near a thermistor beyond a threshold set for the type of plastic being molded. Timing of the pulse is based on the amount of BTUs to be removed from the part. The cooling pulse is never throttled. If more or less cooling is needed, MoldMonitor adjusts the length of the cooling pulse.

CONAIR

For press-side temperature control economical Thermolator water-temperature controllers feature two-piece castings that eliminate up to 40 leak-prone fittings. Units available in single or multiple-zone configurations for direct injection, closed- or isolated-circuit process heating and cooling. Pumps of 7.5 hp, heaters to 48 kw, and process temperatures to 250 F. Microprocessor controls feature continuous autotuning for uniform temperature control regardless of load fluctuations. All units covered by three-year warranty.

Miniature microTemp temperature-control units feature 1/3- or 1/2-hp pumps and 3- or 6-kw heaters. HeaTrac oil temperature control units in sizes from 1 to 3 hp for mold temperatures to 500 F. VacuTrac positive/negative pressure units up to 7.5 hp.

Air- and water-cooled portable chillers in sizes from 1.5 to 10 tons. Total nonferrous construction eliminates corrosion. Brazed-plate condensers and other innovations reduce unit footprint up to 40%. Air-cooled units feature variable-frequency fan drive. Simplified PLC control panels in plain English with few abbreviations. All units backed by three-year warranty.

Central water systems include outdoor air-cooled packages in 20- to 160-ton capacities and single, dual-, and multiple-compressor designs, as well as indoor, water-cooled units from 10 to 140 tons. Copeland semi-hermetic discus compressors are standard.

Pump-tank assemblies include 180-to 1100-gal rotomolded PE tanks or stainless-steel reservoirs from 400 to 4000 gal. Pumps from 1.5 to 100 hp.

Conventional or new fiberglass cooling towers come in capacities from 10 to 500 tons or larger. Heavy-duty, multimedia bypass filters available.

CONTINENTAL PRODUCTS INC.

Water-chilling systems include industrial open-drive chillers with compressors that eliminate motor burnout, costly cleanups or extended downtime; energy-efficiency ratios of 16 or more; built-in capacity control in response to suction pressure; and positive unloaded start. Extra-quiet models and explosion-proof options.

CMA portable air-cooled water chillers have high-efficiency hermetic or semi-hermetic compressor, fully insulated chiller, air-cooled condenser, insulated water reservoir, solid-state temperature controller with readout, built-in freezestat, function lights, pressure gauges, and operating and safety controls. Custom options include JIC, NEMA-12, or explosion-proof electricals, automatic alarm system, hot-gas bypass, capacity control or energy-saver, two-speed capacity modulator, dual pumps, heat recovery, glycol low-temperature units, and chilled-water flow switch.

CMW portable water-cooled water chillers are similar in construction to CMA units, but have water-cooled condensers.

COOLING TECHNOLOGY, INC.

Air- and water-cooled chillers, temperature-control units, cooling-tower systems, and central turnkey systems.

Mini-portable chillers are from 1 to 10 tons and use Scroll compressor technology. Compact portables range from 10 to 50 tons. Both have all nonferrous chilled water circuits. Also available are multicircuited units from 20 to over 300 tons, screw-compressor chillers from 40 to over 300 tons, and cooling-tower systems from 10 to over 400 tons. Temperature controllers with 0.75 to 5 hp pumps have all nonferrous liquid path and lifetime corrosion warranty.

Specialty cooling equipment includes extrusion bath cooling systems. Also provides custom-engineered equipment and installation services.

DELTA COOLING TOWERS, INC.

Polyethylene noncorrosive assembled package cooling towers include Pioneer forced-draft line from 10 to 100 tons, the Paragon induced draft line from 100 to 250 tons, and the Premier induced draft line from 250 to 500 tons in single modules designed and shipped factory complete--no field assembly required.

Packed column Vanguard air strippers from 1 to 5-ft-diam. columns, and custom designs over 5-ft-diam. Integrated packages can be pre-assembled, skid mounted, pre-piped and pre-wired including process controls.

DELTA T SYSTEMS, INC.

Water-circulating temperature-control systems feature horizontal pumps that extend seal life and copper sheath heater element that maximizes heat transfer. Units come in single- or multiple-zone configurations operating to 300 F and conforming to NEMA-1 specifications. Custom designs available.

HB upright series comes with standard 9-kw heating element; fully programmable, microprocessor-based PID digital controller; and pumping capacities from 34 to 5 hp. Larger capacities available.

A and B series with 4.5- and 9-kw heaters and 1/3 and 1/2-hp motors are suitable for smaller molding machines.

Oil-circulating systems operate to either 400 F or 550 F. Units offer low-watt-density, steel sheath heater elements; long-lasting, positive displacement, mechanical seal pumps; and fully programmable, microprocessor-based PID digital controller. Heater sizes from 6 kw and up, pumping capacities from 10 gpm and up, and single and dual-zone configurations. Built to NEMA-1 or NEMA-12 electrics.

EDWARDS ENGINEERING CORP.

CF-Series liquid chillers include 1/2- to 60-ton water-cooled and air-cooled units with a nonferrous coolant circuit, storage reservoir and circulating pump, electronic operating temperature control with n1[degrees] F accuracy, and a digital display. All are prepackaged and mounted in a cabinet with casters.

Additional liquid chillers are offered through 240 tons. Air- or water-cooled units have large stainless-steel reservoirs, as well as a walk-in weatherproof enclosure, automatic capacity control from 0-100% with double-pump arrangement, and damage-resistant evaporator design.

Chiller features automatic air elimination, automatic head-pressure control on outdoor air-cooled models, single central control panel, multiple indicating gauges, and closed water system. Indoor or outdoor installation, completely prepiped and prewired, and factory tested.

EVAPCO CANADA

Cooling towers or complete installation of chilled water-cooling systems. Specializes in cooling tower replacements and rebuilding, pumping stations, and chilled water-storage tanks. Parts and service for all makes of cooling towers and pumps. Services include preventative maintenance programs.

FASTI USA INC.

The Compressed Air Chiller (CAC) is an air chiller that is used with specially designed blow pins or needles to increase the production rate of extrusion blow molding by up to 50%. The GAG process flushes the inside of the blow molded product with air at -31F to remove heat from the inside while the same is being done by the mold on the outside, producing parts that show less distortion and internal stresses.

The Blow Molding Booster (BMB) is a smaller version, which provides cold air at 32F and achieves about 15-20% improvement in the production rate of blow molding processes and is designed for smaller parts such as bottles.

The Atmospheric Air Chiller (ACC) supplies air at a constant temperature of about 37F to cool blown film and flat film extrusion as it leaves the die and an increase of 25% or more is guaranteed. The temperature and the flow rate are controlled to keep the process constant regardless of the ambient temperature.

FOREMOST MACHINE BUILDERS INC.

Air- and water-cooled portable chillers, indoor and outdoor air- and water-cooled central chillers, cooling towers and chemical treatment packages, pump-tank sets with options for standby pumps, discharge headers, filter systems, and central control and alarm panels.

GCI INDUSTRIAL REFRIGERATION

Durable, compact, and self-contained portable chillers, air- and water-cooled in 0.25 to 100 tons, provide coolant in the range of-50 F to 70 F. Hermetic and semi-hermetic units have power-saving hot-gas bypass systems, noncorrosive stainless-steel and copper heat exchangers, and stainless-steel pumps and tanks. Air-condensing units have fully sized condensers to maintain capacity at high ambient temperatures. Water-condensing models have a water-saving automatic regulating valve. Special chillers available for high ambient hazardous atmospheres, thermal fluids, confined spaces, and unusual applications.

Central chillers are self-contained or split for interior or exterior installation, air- and water-cooled from 5 to 120 tons.

Cooling towers and fluid coolers in sizes from 6 to 500 tons. Also custom designs. Tank and pump sets for tower systems.

HAAKE

Circulator line consists of temperature-control modules and bath vessels. More than 70 circulators, recirculators, and cryostats cover temperatures from -130 F to 572 F.

HAMILTON AVTEC INC.

Direct- or indirect-cooling liquid-temperature controllers in pump sizes from 1/2 to 3 hp and 3-12 kw heating, and solid-state or microprocessor controls.

The 2000 series portable air- or water-cooled chillers from 2 to 35 tons include NEMA-rated components, solid-state temperature controllers, semi-hermetic compressors, and hot-gas bypass.

Also process-water systems, including central chillers, pump tanks, and cooling towers. Heat-recovery systems recycle process heat and use it to supplement plant heat during winter.

IMS CO.

Circulators for mold-temperature control have easy-to-read gauges and easy service access to all components. Closed-circuit hot-water circulators have stainless-steel tanks. Model W90V positive/negative pressure circulator can also stop line leaks. Air-cooled TrueMold controllers are totally self-contained. Model 6 oil-heating circulator has a maximum temperature of 400 F; Model HH16, 550 F.

Open-loop Model P75 provides fast, accurate temperature control. TrueTon air-cooled chillers in 1/2 to 25 tons require minimal maintenance and are self-contained. Other sizes and water-cooled units custom-made.

INJECTION MOLDING INDUSTRIES

Pulsed-cooling temperature-control system from REPS Ltd. consists of a controller with up to eight zones of control, heat sensors, an induction-heating coil, and solenoid valves. Cooling pulse is triggered from the molding press at the end of the injection phase of the cycle. Controller analyzes the mold-temperature profile over the last several cycles and calculates the proper amount of cooling pulse needed for the next cycle. At the start of cooling, all water valves are turned on. As each one of the zones proper heat value is extracted, the valve controlling that zone is turned off to provide additional water flow to zones that still need cooling. An induction coil installed in the mold surrounding the core/cavity area allows heating and cooling within the same molding cycle. The coil is turned on after cooling to maintain an optimum cavity temperature and can be used for mold preheating at start-up.

KLEEN-RITE INC.

Recirculating water chillers use plate-type heat exchanger and R-22 refrigerant Units available in 1- to 10-ton capacities and as packaged or remote systems. Microprocessor-controlled, the systems have built-in bypass valve, high-pressure pump, noncorrosive storage tank, freeze protection, and low-ambient controls.

KOOLANT KOOLERS, INC.

Standard and custom industrial chillers come in several water- and air-cooled types with capacities from 2000 to 1.35 million Btu/hr at 65 F leaving fluid temperature and 95 F ambient air. Closed-loop models available for cooling molds, heat exchangers, jacketed tanks, hydraulic fluids, and central chilling systems. Features include hermetic or semi-hermetic compressors, sealed pressurized reservoirs or atmospheric reservoirs, automatic makeup, and submersed coil, brazed-plate or shell-and-tube heat exchangers.

THE LOGIC CORP.

Negative-pressure leakstoppers and negative/positive-pressure mold-temperature controllers for up to 400 F. Vac-U-Temp is a general-purpose temperature controller with negative- and positive-pressure modes usable simultaneously. In addition to controlling temperatures, it stops leaks, improves part quality, and reduces cycle times. Uses water and other heat-transfer fluids.

Company has patented processes for venting molding gases into fluid lines and cooling long, thin cores by transferring water between mold halves through any size core. Free consultation on mold venting and cooling available.

MARVEL EQUIPMENT CORP.

Water- (to 285 F) and oil-temperature control units for up to 655 F for injection molds, extruders, rolls, storage tanks, presses, screws, and other applications. Units are manufactured by Regloplas AG of Switzerland. Optional RT-45 microprocessor control system along with various interfaces enables connection to processing-machine controller. RT-45 with serial interface allows storage of parameters.

Series 200, 300 and 301 dual-zone units, and low-cost Reglo 150ST unit for temperatures to 300 F with oil and 190 F with water. Also 90S compact entry-level unit to 194 F with oil or water.

MATSUI AMERICA, INC.

New MC-N series temperature controllers provide precise temperature control through a new dual-slope PID microprocessor controller. Temperatures are maintained within 0.5[degrees] F of setpoints. Made of stainless steel and nonferrous components for durability. Using a float switch system, MC-N seals itself off from pressure and temperature fluctuations in the water supply system. Heater element is sheathed and plated to resist scaling and other harmful deposits.

Compact MC-N units require little floor space and are highly energy efficient. Available with 1/3- to 1-hp pumps and 3- to 8-kw heaters in water or oil.

Standard equipment includes dual setpoints, alarm diagnostics, 100-hr programmable timer, casters, manifolds, stainless ball valves, and outlet pressure gauge with pressure bypass valve.

MILACRON, INC. PLASTICS TECHNOLOGIES GROUP

Portable chillers from 1 to 30 tons have solid-state or microprocessor-based controls. Central chillers and central-chiller modules offer cooling capacity of 5 to 180 tons in water-cooled configuration and air-cooled capacity of 5 to 30 tons.

Evaporative cooling-tower cells assembled up to 175 tons and larger. Pump-tank sets in basic or full-feature design with diagnostics and standby pumping.

ATC series is a combination closed-system unit with 30-60 F cold-water circuit and a hot-water circuit at 250 F.

Mold-temperature controllers for water and oil from 15 to 100 gpm. Water units have closed or open cooling with solid-state or microprocessor-based controls. Oil units include microprocessor controls and can be supplied with optional cooling circuit.

MOKON DIV. PROTECTIVE CLOSURES

Circulating water and oil temperature-control systems with a temperature range to 600 F, portable chillers, and customized fluid-handling systems.

Mini-Mokon compact water circulating system for small-tonnage machines and laboratory applications available in 2 or 4 kw and measures 23.75 x 11 x 12 in. Horizontally mounted heaters increase efficiency and improve heat transfer. Controls range from solid-state analog to microprocessor-based to custom-designed packages.

Mokon Duratherm circulating-water systems feature noncorrosive construction-copper piping and heaters, stainless-steel pump, and cast-brass heating chamber. Available with 9-, 18-, 24-, 36-, or 48-kw heating capacity and 25 to 80 gpm.

Standard water systems with max. operating temperature of 300 F and pumping capacities to 120 gpm and 60 psi. Nonferrous construction guards against corrosion. Combination heating/chilling unit provides temperature control from 35 F to 250 F with up to 20 tons of chilling capacity.

Oil systems incorporate cool-oil reservoir that eliminates thermal shock associated with in-line, shell-and-tube heat exchanger. Up to three zones of control in the same cabinet and pumping capacities to 30 gpm and 100 psi. Maximum operating temperature of 600 F.

Air- and water-cooled portable chillers from 1/2 to 20 tons. Corrosion-free construction with nonferrous plumbing, stainless-steel supply pump and evaporator, and heavy-duty plastic reservoirs.

Solid-state or microprocessor controls standard on all systems. Optional microprocessor controls with serial communication and SPI protocol.

Sepcializes in custom temperature-control systems and also carries Leak-master line of negative-pressure systems that eliminate processing problems associated with leaks, and D-Scaler systems, which remove rust, scale, and/or lime deposits.

MOTIVAIR CORP.

Portable, compact, self-contained, air-or water-cooled, packaged "cycling" water chillers range from 1/2 to 50 tons (1/2- to 20-ton units in stock). Include insulated large-capacity storage tank, circulation pump, microprocessor control, remote start/stop, pump pressure gauge, and full set of refrigeration gauges. Cycling concept is suitable for constant or variable cooling loads. Operating costs are directly proportional to the percentage of chiller capacity utilized.

OMEGA ENGINEERING INC.

Offers constant-temperature circulating baths, as well as full line of sensors, instrumentation, and hardware accessories to monitor and control water- and oil-circulating systems.

PLASTIC PROCESS EQUIPMENT INC.

Improved mold fluid-temperature controller heats to 250 F with touch-panel keyboard and digital readout for easier settings and a more accurate temperature control of [+ or -]1[degrees] F. Designed for continuous use.

POLYSCIENCE

Liquid chillers and constant-temperature equipment Chillers in a variety of cooling capacities with several pump options. Temperature-control equipment for process applications and for small-scale laboratory and quality-control requirements. Controller options from basic analog control to programmable controllers capable of RS232 interface for complex time/temperature profiling.

PROCESS EFFICIENCY PRODUCTS

Cooling- and process-water filters use permanent filter media to remove particles as small as 5 microns. Filter reduces fouling of cooling equipment and maintains efficiency and low kw usage. Filtration improves quality of water, which eliminates draining and flushing of equipment, lowers chemical cost, and prevents downtime. Filters from 2 to 1000 gpm.

PROTEC COOLING TOWERS, INC.

Low-maintenance cooling towers have corrosion-resistant components. Basin, casing, and air intake louvers are made of long-lasting fiberglass-reinforced plastic. Gelcoat protects fiberglass from ultraviolet rays. In most cases, round, bottle-type cooling towers operate at considerably lower horsepower than rectangular towers. Units from 3 to 1000 tons shipped assembled or knocked down.

QPC 

Water and oil mold-temperature controllers, portable chillers, central chillers, cooling tower systems, and stainless-steel pump tanks.

Mold-temperature controllers utilize horizontally mounted pumps with vertically mounted beaters. Pumps have continual seal flush. Heaters are flanged, low-watt-density immersion units. Controls are microprocessor-based. Multizone configuration available. Hot-oil heaters range from 6 kw through 36 kw and have a nonleak seal cooling and flushing circuit.

Portable chillers use hermetic, semi-hermetic, or scroll compressors. Stainless-steel plate and frame and shell-and-tube heat exchangers are used. All have insulated copper pipe, nonferrous reservoir, and stainless-steel cabinets.

Central chillers feature compressors with automatic load compensation. Pump tanks are insulated stainless steel. Solid pump deck for mounting pumps and NEMA-12 control panels are standard.

Tower systems have round fiberglass towers coupled with stainless-steel pump tanks, which are double welded at all seams. Control panels and components are NEMA-12. Fiberglass towers come with a five-year shell warranty.

All pump tanks and reservoirs are stainless steel. Stainless-steel cabinetry is standard on small portable chillers and mold-temperature controllers.

REGLOPLAS AG

See Marvel Equipment Corp.

RITE-TEMP MANUFACTURING

Refrigerated water chillers in four designs of 2 to 20 tons. Air- and water-cooled units have standard 40-gal, stainless-steel, closed evaporator tank. Also portable units, indicating gauges, indoor or outdoor installation, and user-friendly controls. Special controls, instrumentation, or electrical options available.

RJ. INDUSTRIES, INC.

Replacement water and hot-oil pumps fit most brands of chillers, mold-temperature controllers, cooling towers, and various water-cooling systems. Matching pumps sold under brand names such as Scot, Burks, Aurora, Sherwood, Paco, B&G, Price, and Worthington. A cross-reference of OEM pumps has been compiled for quick identification of replacement seal kits and other parts. Obsolete models also cross-referenced to presently available replacements.

SCHREEBER ENGINEERING CORP.

Air- and water-cooled chillers from 1/2 to 20 tons have water systems designed for unrestricted circulation and proper turbulence in the heat exchanger. No need for antifreeze. Extra-large, stainless-steel reservoirs; Tecumseh compressors; polyester powder coating for long life; and conventional fittings, parts, and motors for easy replacement.

All units have tilted control panel, cycle on/off as needed, use no hot-gas bypass, and have "contamination-free" stainless-steel or bronze water pumps.

STERLCO DIV., STERLING, INC.

Water- and oil-circulating temperature-control systems for standard and high-temperature applications to 650 F. Portable and central chilling systems from 0.5 to 200 tons. Chillers have compressor and control technology to match application. Cooling towers, water reservoir and pumping systems, water filtration and treatment equipment available.

New line of compact temperature control units with 9 and 12 kw heaters and pumps from 3/4 to 5 hp. Many models feature simplified internal cast or nonferrous fluid circuit with 40% fewer connection and 80% fewer mechanical parts than conventional designs. Simplified design provides balanced flow with lower pressure drop. Most of the company's temperature control units feature M2B fuzzy logic control, which provides adaptive tuning to the process. New units also feature NEMA 12 electrics and meet new NEC electrical standards.

Water-temperature control units provide water supply temperature to 300 F. Heaters available in sizes to 48 kw; pumps from 3/4 to 7 1/2 hp. Single, dual- and three-zone units can be supplied with common power and water supply connections. Nonferrous construction and a variety of control and computer-interface options available.

Air- and water-cooled portable chillers from 0.5- to 30-hp supply chilled water from 0 to 70 F in a variety of flow rates and pressures, using single and dual pumps. PID autotuned microprocessor controls ensure accuracy to [+ or -]1[degrees] F. Many models feature scroll compressors for lower operating costs.

Air- and water-cooled central chilling systems available along with comprehensive systems design and installation services. Units feature capacity staging and unloading. A central chilling station includes tank, refrigeration, control system and pumping system in a small footprint with lower installation costs.

Metal cooling towers from 10 to 632 tons and fiberglass units from 50 to 200 tons. Equipment, chemicals, and testing programs offered. (See ad Cover II.)

TECHNE INC.

Circulating bath systems for open and closed applications for above-ambient temperatures to a maximum of 250 C. Five bath capacities from 8 to 48 liters and five temperature-controlled circulators make up the 25 available systems. Each can be used as an open bath to provide maximum working area or as a closed circulating system for external apparatus. Inlet and outlet pipes at the rear of the circulator can be used for external circulation or terminated for circulation only within the bath itself Although designed primarily for heating applications, the baths are calibrated at temperatures below ambient and can be used at sub-ambient temperatures.

TEMPTEK, INC.

Mold-temperature controllers, portable chillers, pump-tank stations, and cooling-tower cells designed for mechanical simplicity and operator convenience, utilizing ultra-rugged construction and fewer components.

Temperature controllers available in water and hot-oil, open- and closed-loop configurations. Water units control to 250 F, oil-circulating units to 400 F. Space-efficient units have high-flow pumps, flanged heaters, and advanced electronic instrumentation with remote capabilities.

Portable chillers and chilling modules available in air- and water-condensed versions. Units from 1 to 30 tons with operating temperatures from 30 to 70 F. Chilling modules from 5 to 40 tons with operating temperatures from 20 to 60 F.

Pump-tank stations utilize minimum floor space while emphasizing vertical dimension for water storage. Standard process connections for pumps, sensors, drains, and water-level controls simplify installation.

Cooling towers in galvanized metal or fiberglass from 10 to 540 tons employ energy-efficient prop fans, generous wet decks, and large water reservoir.

THERMAL CARE

Portable chillers in self-contained air- or water-cooled designs from 1/2 to 40 tons have accessible cabinet design, nonferrous water system, and microprocessor controls with dual-digital displays, five-year warranty, seven positive-action switches, and 19 diagnostic lights.

Air-cooled central chillers include heat-reclaim indoor units or low-ambient outdoor units in capacities to 270 tons.

Water-cooled central chillers in two configurations: TSW/TPW economical plantwide systems from 20 to 180 tons with serviceable semi-hermetic or scroll compressors and two or more independent refrigeration circuits for precise control, and TXW dual circuit units with screw compressors from 80 to over 300 tons. All central chillers come with Allen-Bradley touchscreen PLC with three-year warranty.

Fiberglass cooling towers in FC and FT series from 15 to 240 tons. Units have a high-efficiency induced-draft design and strong, lightweight, noncorrosive FRP shell. Nonferrous construction and five-year total tower warranty (including motor) on FC series towers.

Pump/reservoir assemblies custom engineered in any size and configuration for tower or chiller applications. Have grooved pipe connection system; fiberglass, stainless-steel, or double-welded steel construction; solid pump decks; and premounted, prewired control panels.

Water-treatment systems control scale, corrosion, suspended solids, and microbiological growth with a single panel-mounted unit. Lifetime warranty. Filtration equipment includes sand media filters, centrifugal separators, bag filters, and filter strainers.

Temperature-control units in a complete range of pumping, heating, and cooling configurations for oil and water from 0.75 to 7.5 hp, 3 to 60 kw. Unitized cast construction of twin tank and pump assembly, microprocessor with dual digital displays and five-year warranty, seven positive-action switches, and 15 diagnostic lights. Negative pressure units available.

T.U.C. INC.

Water and hot-oil temperature controllers and portable chillers.

Water units in upright, low-profile, and subcompact configurations. Digital or microprocessor controls. Microprocessor unit has RS232C, RS422, and RS485 capability. Dual-probe sensing, solid-state control, and horizontal pumps with seal flush offer simple operation. Single- and multizone models with optional features.

Hot-oil systems control temperature from 100 to 500 F. Heater capacities from 6 kw and up. Centrifugal pumps incorporating water-cooled seals are standard. Upright and compact models available.

Portable chillers with air- and water-cooled condensing from 1 to 20 tons. Hot-gas bypass, stainless-steel or nonferrous fully insulated reservoir tanks, all-copper piping, and freeze-stat control.

VAN STEENBURGH LIQUID CHILLERS

Chil-Trak series reciprocating liquid chillers from 2 to 7.5 tons with remote condensers discharge heat outdoors and/or reclaim heat for use elsewhere. All sizes have Head Start receiver, which matches capacity with load to ensure smooth, consistent operation and low-ambient-temperature start-up. Front-panel access to valves for all sections of system.