Temperature Control UnitsIntended for applications from -150 to 750°F (-101 to 399°C), integrated heat transfer equipment for heating and cooling are closed-loop systems designed for aqueous and nonaqueous (thermal fluid) heating or cooling using a single circulating media. Temperature control units are suited for heating and cooling of batch or continuous processes and can be used in industries such as chemical, pharmaceutical, inks and dyes, plastics, rubber, textile, water treatment and food processing.
Fulton Thermal Corp., (315) 298-5121, www.fulton.com
Heat Transfer Fluid System
A sealless magnetic-drive pump option is now offered for both the HTF 500 (up to 500°F [260°C]) and 600 (up to 600°F [316°C]) Series. The magnetically coupled pump design option eliminates the need for conventional seals and seal servicing. An energy-efficient design allows the system to heat up quickly, increasing productivity. A unique heating and cooling design helps reduce thermal shock. Durable and accurate microprocessor controls, with NFPA 79 electrical safety standards and a UL-labeled electrical subpanel, offer precision temperature control and improved part quality.
Mokon, (716) 876-9951, www.mokon.com
550°F Oil Unit
With an operating temperature to 550°F (288°C), hot-oil unit is available in single- or dual-zone designs. Heating capacity is 6 to 24 kW, and pumping capacity is 10 to 24 gal/min. With heating and cooling capabilities, the hot-oil unit has an electrical package built in accordance with NEC electrical code and with UL listed electrical components. The single-zone unit has a 24 x 16 x 46" footprint.
Delta T Systems, (262) 628-0331
Series 5000 and 6000 have adjustable temperature, pressure and flow-rate alarms that alert users to problems such as blocked cooling lines or overload conditions that could damage equipment or compromise precision. The chillers are capable of maintaining process temperatures from 14 to 158°F (-10 to 70°C) with ±0.1°C stability. Standard features include large temperature and pressure/flow rate digital readouts, one-touch temperature control and ambient-temperature tracking capability.
PolyScience, (847) 647-0611
Mold Temperature Control Units
Sentra Series temperature controllers are water-circulating units that control process application temperatures between 30 and 250°F (-1 and 121°C) for heating and cooling. SK Series process liquid chiller is suited for use in processes such as plastic molding and die-casting. LE Series includes the company’s AVT modulating cooling valve for precise straight line temperature control and a microprocessor instrument for easy-to-use operation. Heating capacities range from 10 to 34 kW.
Advantage Engineering, (317) 887-0729
Thermoelectric Recirculating Heater/Chiller
Pelti-Therm, a thermoelectric recirculating heater/chiller system, is suited for applications such as semiconductor and pharmaceutical, It is environmentally friendly and compatible with a range of coolants. Features of the heater/chiller include multiple pump options, flexible design and compact footprint. Safety features include overtemperature protection with redundant overtemperature interlocks.
Applied Integrated Systems, (925) 447-0162
Central Chillers Employ Rotational Compression
RS Series employs rotational compression technology with up to 50 percent fewer moving parts than reciprocating compressors. In sizes from 60 to 195 ton capacity, the central chillers utilize semi-hermetically sealed screw compressors. Up to 100 tons, compressors are matched to brazed plate evaporators; from 115 to 195 tons, they match to shell-and-tube evaporators. The screw compressors use R-134a, a non-CFC refrigerant providing energy efficiency increases of up to 12 percent.
AEC, (630) 595-1060
Water-Cooled Packaged Chillers
Series WS can be supplied with a 20 to 60 hp compressors and has a cooling capacity of 14.7 to 45.5 tons. The multi-cylinder, semi-hermetic compressors have a forced-feed oil lubrication system, discharge and suction service valves, and a gas-cooled motor. The chiller vessel has high-efficiency shell-and-tube construction and a copper tube with inner fins on the refrigerant side. Safety features include freezeup controls, high and low refrigerant pressure controls, compressor motor overload protection, tank low-level cutout (glycol units), an oil pressure safety control and a refrigerant pressure-relief valve.
Berg Chilling Systems Inc., (416) 755-2221
Deep-Well Compact Baths
Constant-temperature fluid baths can be used to calibrate thermometers and temperature sensors. The deep-well compact baths provide 18" (457 mm) of depth to accommodate liquid-in-glass thermometers and other long-stem thermometers. Four baths in this series cover temperatures from -112 to 149°F (-80 to 300°C). Stabilities over that range are from ±0.005 to ±0.015°C and uniformities to ±0.007°C.
Hart Scientific Inc., (800) 438-4278
Unichillers are available with cooling powers from 300 W up to 100 kW at 59°F (15°C). With a tower design, the T-models require minimal floor space. All circulation thermostats can be factory fitted with a heater and cover a temperature range from -4 to 176°F (-20 to 80°C). Features include plug-and-play controllers in three options, internal and external platinum RTD sensor calibration through offset correction, flow control, over- and under-temperature control, and overheating protection for units from 10 kW on remote maintenance via modem. Visual and audio alarms and adjustable alarm value also are standard.
Huber USA, (631) 912-0800
The FL Line contains 20 models with capacities up to 1.7 kW. Many of the chillers can be placed under or on top of a lab bench, and models with up to 11 kW of cooling capacity are designed with small footprints. The working temperature range covers -4 to -104°F (-20 to 40°C). The PID controller enables a temperature stability of ±5°C. Four different pump types with flow rates of up to 60 l/min and 87 psi pressure will meet a variety of requirements. All units have an LED temperature display integrated into a splash-proof, waterproof keypad. An RS232 interface and analog alarm output are located on the front panel.
Julabo USA Inc., (800) 458-5226
Thermal Control Units
Water-cooled chillers are designed to remove heat from a process and discharge it to an auxiliary facility water supply such as a central chilled water system or cooling tower. The facility water source does not need to be temperature controlled, but water sources exceeding 35°C may require special design features. Affinity thermal control units have a small footprint, modular design, and quiet operation, with capacities up to 100 kW.
Lydall Industrial Thermal Solutions Inc., (800) 238-8581
Kodiak compressor-based recirculating chiller is suited for applications where users need precise temperature control or cooling below ambient temperature. Features include an easy-access fill port; reservoir level indicator; durable exterior panels; heavy-duty casters, and a large controller display. The custom PID controller, large thermal-mass tank and advanced refrigeration control circuit help ensure that chiller maintains ±0.1°C stability.
Lytron Inc., (781) 933-7300
Water-cooled scroll chillers are offered in sizes from 15 to 60 tons. The systems can be designed with two or four compressors in one or two circuits, and options include heat recovery, sound attenuation and hot gas valves. Tank and pumps also can be incorporated. Microprocessor controls allow compressor staging and remote control.
Motivair Corp., (716)689-0222
Offered in a range of configurations such as one-, two- or three-channel chillers, system can be supplied with air- or water-cooled condensers. With a temperature range of -94 to 392°F (-70 to 200°C) and stability of ±0.1°C, the chillers have cooling capacity ranges from 1,700 to 256,000 BTU/hr (500 to 75,000 W) and up to three independent loops. Cooling fluid types include water, deionized water, synthetic fluids, ethanol, ethylene glycol or propylene glycol/water mixtures, and mineral oil, or others as required. Embedded computer control monitors critical system functions and controls refrigerant valves. Built-in self-diagnostics test for critical functions such as refrigerant temperatures, voltages and sensors.
Mydax Inc., (530) 888-6662
Hot-Oil-Circulating Temperature Control Unit
Hot-oil unit will circulate and precisely control the temperature of oil flowing through your process. Maximum temperature is 450°F (232°C). The oil temperature is continuously monitored with one thermocouple located in the oil supply line, which relays any deviation from setpoint back to the controller. A three-phase, flanged, low-watt-density immersion heater heats process oil. Heaters are vertically mounted to eliminate bending and stress that could cause premature burn out and are electrically interlocked to prevent their operating if the pump is not running or if low oil pressure exists. A bypass circuit incorporated in the system ensures heater flooding if there is blockage in the process lines, thus eliminating the possibility of heater burnout.
QPC Systems Inc., (616) 394-6979
Manufactured for a range of industrial and commercial applications, water chillers provide a constant supply of chilled, recirculated water. Multi-compressor systems operate independently as required.
Rite-Temp Manufacturing, (800) 235.0582
Oil Temperature Control Units
Line of oil-circulating temperature control units includes compact and midsize units. The compact, high-temperature heat transfer system is suited for extruders, blow-molders and injection molders. It provides automatic control in the temperature range of 100 to 400°F (38 to 204°C) with synthetic fluid. The midsize heat transfer system includes the company’s M2B+ Microprocessor for higher accuracy and superior repeatability. It provides precise temperature control up to 550°F (288°C).
Sterling, (630) 595-1060
Series LK-20 portable recirculating chiller has a low-profile design that permits installation in tight spots. Models are suitable for use in OEM and end user applications. Features include a high-efficiency refrigeration system and available all-stainless steel plumbing and cabinets.
Tek-Temp Instruments, (800) 259-4212
Haake EZ Cool unit is designed to heat and cool externally in applications such as analytical instrumentation, jacketed reactors and rotary evaporators. The circulator also can be used to replace tap water cooling in small lab applications. The stainless steel circulator is quiet and robust, making it suitable for laboratory applications. The unit controls temperatures ranging from 14 to 176°F (-10 to 80°C). Its bathless design minimizes the evaporation of temperature fluid during daily use.
Thermo Fisher Scientific, (603) 430-2211