www.process-heating.com | March 2011 | Volume 18, Number 3
Use our Equipment Overview on Ovens to research manufacturers’ capabilities and zero in on those that meet your needs.
Periodical Class
14 The Way the Wind Blows 18 Getting Energy from Waste
These heaters will be fully assembled and checked at our factory before delivery.
Get a complete heater package Need a new heater? Get a complete heater package from Heatec. A complete package eliminates hassles, saves you time and saves you money. Our package includes design, manufacturing, factory assembly, on-site setup and startup. We also offer maintenance contracts and provide free phone support. Heaters have many components from a variety of manufacturers. It’s always best to mate these components with the heater and adjust them before the heater is shipped to you. This eliminates most compatibility problems. Our goal is that setup of our heater at your plant will be trouble free, without undue rework. Most setups should only require re-assembly of parts dismantled
for shipping, plus connection of electrical power and piping. Complete factory assembly eliminates last-minute fieldwork that can cause startup delays. It also eliminates buck passing if things don’t go right. Moreover, if a problem develops later, you won’t have to wrangle with a variety of component suppliers to fix it. So, when you buy a new heater, always choose a manufacturer that provides a complete package. Heatec has this capability, which sets us apart from others. Call today and let us answer any questions you have about our heater packages.
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© COPYRIGHT 2011 OMEGA ENGINEERING, INC. ALL RIGHTS RESERVED
March 2011 Volume 18 • Number 3
www.process-heating.com WEB EXCLUSIVES: READ MORE AT WWW.PROCESS-HEATING.COM Q Air Knives Boost Performance of Infrared Drying System
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Q Infrared Applications in the Real World
Fans The Way the Wind Blows Selecting a fan type and fit by purpose increases efficiency and performance. Knowing whether your application requires high volumes of airflow with low pressure or high pressure airflow with low volumes is just one of the questions to be answered in order to determine the correct fan shape selection.
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Q Plate Points Learn about some of the features that are available in plate heat exchangers, such as wide-gap spacing, semi-welded plates and double-wall designs.
Features 14
With the changeover from solvent-based to water-based coatings, drying times in hot air circulation ovens have increased, reducing throughput. Air knives help shorten drying time.
Heat Exchangers Getting Energy from Waste
Want to save valuable floor space, heat products faster and increase production line speeds? Infrared could be your answer. Sign up for “Infrared Applications in the Real World,” a webinar presented by Process Heating in conjunction with the Infrared Division of the Industrial Heating Equipment Association.
UPDATED DAILY Q New Products
Q Industry News
ALWAYS ONLINE Q Archives Q Calendar of Events Q Drying Files columns
Q Energy Notes column Q Equipment Overviews Q Heating Highlights
Q Digital Editions Q Buyers Guide Q Archived Webinars
Take a close approach for more power. Compact plate heat exchangers offer benefits for heat recovery applications.
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Equipment Overview: Ovens
Check out our redesigned site with more frequent updates and web exclusives!
Hot Prospects Use our Equipment Overview on Ovens to research manufacturers’ capabilities and zero in on those that meet your needs.
Q Go Mobile Use your smart phone to read Process Heating, wherever you are! Simply visit http://gettag.mobi/ with your phone’s browser to install the Microsoft Tag app. Then, point your phone’s camera at the tag below to be taken to our current issue online — instantly. The reader works on most current smart and advancedd ffeature phones, h includi l d ing Windows Mobile (5.5 and above), iPhone, Blackberry, Symbian and J2ME.
About the Cover
Columns & Departments 6
Editor’s Page
28 Classified Directory
7
Inner Workings
29 Advertiser Index
13 Calendar
29 Free Subscription Form
24 Products
30 Places & Faces
A 1,112°F (600°C) industrial oven from Hope Valley, U.K.-based Carbolite (www.carbolite.com) has a vertical opening door, 92 ft3 (2,600 liter) capacity, load management system and integral quench tank. It is used for an aerospace manufacturing process compliant to NADACP AMS 2750D. To learn more about ovens, see page 20.
PROCESS HEATING (ISSN 1077-5870) is published 12 times annually, monthly, by BNP Media, 2401 W. Big Beaver Rd., Suite 700, Troy, MI 48084-3333. Telephone: (248) 362-3700, Fax: (248) 362-0317. No charge for subscriptions to qualified individuals. Annual rate for subscriptions to nonqualified individuals in the U.S.A.: $115.00 USD. Annual rate for subscriptions to nonqualified individuals in Canada: $149.00 USD (includes GST & postage); all other countries: $165.00 (int’l mail) payable in U.S. funds. Printed in the U.S.A. Copyright 2011, by BNP Media. All rights reserved. The contents of this publication may not be reproduced in whole or in part without the consent of the publisher. The publisher is not responsible for product claims and representations. Periodicals Postage Paid at Troy, MI and at additional mailing offices. POSTMASTER: Send address changes to: PROCESS HEATING, P.O. Box 2146, Skokie, IL 60076. Canada Post: Publications Mail Agreement #40612608. GST account: 131263923. Send returns (Canada) to Pitney Bowes, P.O. Box 25542, London, ON, N6C 6B2. Change of address: Send old address label along with new address to PROCESS HEATING, P.O. Box 2146, Skokie, IL 60076. For single copies or back issues: contact Ann Kalb at (248) 244-6499 or
[email protected].
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By Linda Becker
Commentary What Does It Mean for You?
Boiler Emissions Rules Released On February 21, the Environmental Protection Agency issued pollution standards that apply to new and existing industrial, commercial, and institutional boilers and process heaters. Two rules were released as national emission standards for hazardous air pollutants (NESHAP). The first requires all “major sources” to meet hazardous air pollutant (HAP) emissions standards reflecting the application of the maximum achievable control technology (MACT). In the second rule, EPA released a national emission standard for two “area source” categories: industrial boilers and institutional and commercial boilers. Under the Clean Air Act, EPA classifies sources by the amount of toxic pollution they emit. • A “major source” facility emits 10 or more tons per year of any single air toxic, or 25 or more tons per year of any combination of air toxics. In addition, the EPA defined 15 subcategories of “major source” boilers and process heaters based on their designs. The final MACT rule just released includes specific requirements for each of these 15 subcategories. • An “area source” emits less than 10 tons per year of any single air toxic, or less than 25 tons per year of any combination of air toxics.
SYSTEM DOWN!
While all of the intricacies of the rules are too lengthy to cover here, a few key points are worth noting. For facilities identified as “major sources,” the EPA established critical limits. For certain types, such as new and existing natural gas- and refinery gas-fired units, the final rule establishes a work practice standard instead of numeric emission limits. The rule also established a work practice standard for new and existing units with a heat input capacity of less than 10 million BTU/hr, or for new and existing limited-use units, which EPA defines as units that operate less than 876 hours per year. Although the boilers covered by the new standards will not be required to comply until after February 2014, the EPA estimates as many as 200,000 boilers are affected. For more information on these standards, visit http://www.epa.gov/airquality/combustion.html.
Linda Becker, Associate Publisher and Editor,
[email protected]
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M a r c h 2 0 1 1 • Process Heating
Inner Workings
Move over silicon. There’s a new electronic material in town that generates little heat, and it goes fast. The material, graphene, which was the focus of the 2010 Nobel Prize in physics, is a fancy name for extremely thin layers of ordinary carbon atoms arranged in a “chicken-wire” lattice. The layers — sometimes just a single atom thick — conduct electricity with virtually no resistance, little heat generation and less power consumption than silicon, say the developers. By heating silicon carbide, a widely used electronic material, Georgia Tech researchers were able to drive silicon atoms from the surface, leaving just the carbon lattice in thin layers of graphene large enough to grow the kinds of electronic devices familiar to a generation of electronics designers. With silicon device fabrication approaching its physical limits, many researchers believe graphene can provide a new platform material that would allow the semiconductor industry to continue its march toward eversmaller and faster electronic devices — progress described in Moore’s Law. Though graphene is not likely to ever replace silicon for everyday electronic applications, it could take over as the material of choice for high performance devices. And graphene ultimately could spawn a new generation of devices designed to take advantage of its unique properties. A new electronics material is needed because silicon is running out of miniaturization room. “Primarily, we’ve gotten the speed increases from silicon by continually shrinking feature sizes and improving interconnect technology,” says Dennis Hess, director of the National Science Foundation-sponsored Materials Research Science and Engineering Center at Georgia Tech.“We are at the point where in less than 10 years, we won’t be able to shrink feature sizes any farther because of the physics of the device operation. That means we will either have
to change the type of device we make, or change the electronic material we use.” It’s a matter of physics. At the very small size scales needed to create ever more dense device arrays, silicon generates too much resistance to electron flow, creating more heat than can be dissipated and consuming too much power. Silicon has matured over many generations through constant research and improvement, and many experts agree that it always will be around, useful for low-cost consumer products such as iPods, toasters, personal computers and the like. But Walt de Heer, a professor in Georgia Tech’s School of Physics who pioneered the development of graphene for high-performance electronics and leads the school’s graphene research, expects
Photo by Mali Azima
Silicon Replacement Generates Little Heat
Professor Walt de Heer leads Georgia Tech research into fabricating electronic devices from epitaxial grapheme, which produces little heat.
graphene to find its niche doing things that could not otherwise be done. “We’re not trying to do something cheaper or better; we’re going to do things that can’t be done at all with silicon,” he says. “Making electronic devices as small as a molecule, for instance, cannot be done with silicon,
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but in principle could be done with graphene.” Much of the world’s graphene research, including work leading to the Nobel Prize, involved the study of exfoliated graphene, which are layers of the material removed from a block of graphite, originally with tape. While agreeing that the exfoliated material has produced useful information about graphene properties, de Heer dismisses it as “a science project” unlikely to have industrial electronics application. “Electronics companies are not interested in graphene flakes,” he says. “They need industrial graphene, a material that can be scaled up for high-volume manufacturing. Industry is now getting more and more interested in what we are doing.” “We are not really trying to compete with these other groups,” he says. “We are really trying to create a practical electronic material. To do that, we will have to do many things right, including fabricating a scalable material that can be made as large as a wafer. It will have to be uniform and able to be processed using industrial methods.”
Dryer Maker Gets More Out of Lignite Using Waste Heat
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M a r c h 2 0 1 1 • Process Heating
Heyl & Patterson Inc., a specialist engineering company headquartered in Pittsburgh, has created a new technology for coal-firing power plants that improves fuel quality, decreases volatile gas emissions, and reduces a plant’s operating
Inner Workings HT, consists of extruded polystyrene rigid-foam panels. The high temperature limit makes the foam suitable for applications exposed to high temperatures that require high compressive strength, low water absorption, resistance to rot and good insulation performance. Styrodur
expenses and maintenance costs. Called, “DryFining,” the project was led by electric service provider Great River Energy, Maple Grove, Minn., and launched in December 2009. Coal Creek Station in Underwood, N.D., operated by Great River Energy, was used as the test facility. According to the company, “DryFining” is a combination of drying and refining. This fuel enhancement technology simultaneously dries and refines lignite, a form of coal that is softer and contains more moisture. Lignite ordinarily is burned as it is mined, but its water content causes it to produce a lower quality fuel. Heyl & Patterson custom-engineered a series of fluid bed dryers for the project that use waste heat from the plant’s existing processes to gently dry the lignite and cause it to burn cleaner and more efficiently. The drying process also reduces gases such as carbon dioxide and removes compounds containing sulfur and mercury. “Utilities across the country have been seeing increases in the cost of generating and transmitting electricity, with power bills up to ten percent higher than previous years,” says Jeff Morris, vice president of Heyl & Patterson.“Our project was able to help provide a sustainable, cost-reducing solution utilizing existing energy from within the power plant.” More than 400,000 tons of lignite has been processed since the project’s inception.
Insulation Effective Up to 221°F A key feature of insulation from BASF, Florham Park, N.J., is its heat-distortion temperature of up to 221°F (105°C), which is the application-limit temperature. The new material, called Styrodur
HT stays dimensionally stable even with high ambient temperatures or high solar radiation, according to the company. BASF provides the insulation material at nominal compressive strengths of 300 and 600 kPa. The product is particularly suitable for insulating hot water tanks, insula-
Did you know that 90% of heat transfer fluid breakdowns are caused by equipment issues? Listing and temperature range chart for all Paratherm heat transfer fluids.
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Inner Workings tion applications with hot water that are exposed to pressure and moisture, and for various insulation applications in solar technology. For more information, go to www.styrodur.com.
Defining Boiler Water Problems
ARI Valves can take the heat… There’s no margin of error when it comes to reliability of the valves in your system. While you may not have to protect against lava flow, we can solve your problems up to 800˚F! ARI Valves are the choice of industrial professionals. Our quality assurance system is in accordance with DIN ISO 9001. You can trust our bellows-seal valves to perform under adverse conditions and never need to replace stem packing. ARI Valves are in Heat Transfer Service Around the Globe. So if you are responsible for the security and safety of your company’s system, make certain that ARI Valves are the choice. When things get hot, you should specify ARI Valves for Thermal Transfer Fluid Applications. ARI Valves…The Obvious Choice
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Boiler operators face the potential of three particular problems, any one of which can be alleviated with proper water treatment. Amsolv, an industrial water treatment company headquartered in Waxahachie, Texas, addresses the three most-common boiler water problems and how they occur, on www.amsolv.com. They are: • Scaling. Scaling occurs as water is heated and converted into steam. The boiler functions as a distillation unit, taking pure water out as steam and leaving behind concentrated minerals and other contaminants in the boiler. Scale forms as a result of the precipitation of normally soluble solids that become insoluble as temperature increases. Some examples of boiler scale are calcium carbonate, calcium sulfate and calcium silicate. • Corrosion. Corrosion is a general term that indicates the conversion of a metal into a soluble compound. In the case of boiler metal, corrosion is the conversion of steel into rust. In a boiler, two types of corrosion are prevalent. There is oxygen-pitting corrosion, seen on the tubes and in the preboiler section. And there is low-pH corrosion, seen in
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M a r c h 2 0 1 1 • Process Heating
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Inner Workings the condensate return system. Corrosion of either type can lead to failure of critical parts of the boiler system, deposition of corrosion products in critical heat exchange areas, and overall efficiency loss. • Carryover. Carryover is caused by either priming or foaming. Priming is the sudden violent eruption of boiler water that is carried along with steam out of the boiler. It usually is caused by mechanical conditions. Priming can cause deposits in and around the main steam header valve in a short period of time. Foaming causes carryover by forming a stable froth on the boiler water that then is carried out with the steam. Over a period of time, deposits due to foaming can completely plug a steam or condensate line.
Software Controls Dryer’s Energy Use The Siemens Industry Solutions Division, Erlangen, Germany, has developed software with an energy-saving control strategy for dryer sections. The Sipaper APC (Advanced Process Control) DrySec reduces steam consumption in papermaking by decreasing energy needs in the drying process. Optimized setpoints are calculated for all drying parameters and adjusted to actual process conditions. The system was piloted successfully at the Rhein Papier GmbH’s paper mill in Hürth near Cologne, Germany, reducing the main steam requirement by more
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Inner Workings
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than 3 percent, according to Siemens. Utilizing steam to dry paper accounts for a large portion of the energy costs in the paper industry. The Sipaper APC DrySec’s main focus is on air requirements, The dryer section of the paper heat recovery, steam, and machine at Rhein Papier paper mill in Hürth, Germany, saves energy via the condensate system. new software control. Measured values are used to adapt the model at regular intervals to current process conditions. The system also ensures that water evaporating from the paper web is exhausted continuously without condensation. Depending on the type of paper machine, other parameters can be calculated such as the heat curve, the heating of the white water and the quantity of steam in the steam box. The software can be used as a soft sensor because it calculates process variables for which no instrumentation is installed. This includes, for example, the moisture content and temperature of the paper web upstream and downstream of each drying cylinder, and the energy consumed in the heat exchanger, which leads to a better understanding of the plant.
Calendar of Events March 15-17 — Eclipse Combustion Workshop, Rockford, Ill. Call (815) 877-3031 or visit www.eclipsenet.com. 15-17 — Steam System Training (Level III) Training, Las Vegas. Call (888) 615-3559 or visit www.swagelokenergy.com. 15-17 — Semicon China, Shanghai, China. Call 86 21 5027 0909 or visit semiconchina.semi.org. 16-17 — Plastec South, Orlando, Fla. Call (310) 445-4200 or visit www.canontradeshows.com/expo/plastecshows/. 20-23 — SNAXPO, Grande Lakes, Fla. Call (800) 628-1334 or visit www.snaxpo.com. 21-24 — Infrared Thermography Training Course (Level I), Dallas. Call (978) 901-8405 or visit www.infraredtraining.com. 22-26 — IFPE, Las Vegas. Call (800) 867-6060 or visit www.ifpe.com. For over 50 years, we have provided Electrical Safety Equipment for Industry. For complete info, contact us at
[email protected]. Visit our website at www.protectioncontrolsinc.com.
29-31 — Interphex Trade Show and Conference, New York. Call (888) 334-8704 or visit www.interphex.com.
April 4-5 — Hauck Mfg. Combustion Seminar (2-Day Version), Lebanon, Pa. Call (717) 272-3051 or visit www.hauckburner.com. PH12061ProtControls.indd 1
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5-7 — International Wood Composites Symposium, Bell Harbor Convention Center, Seattle. Call (509) 335-2262 or visit www.woodsymposium.wsu.edu. 5-7 — John Zink Co. Vapor Control Systems Seminar, Tulsa, Okla. Call (918) 234-5710 or visit www.johnzink.com. 6-8 — Hauck Mfg. Combustion Seminar (3-Day Version), Lebanon, Pa. Call (717) 272-3051 or visit www.hauckburner.com. 6-8 — International Converting Show (ICC) USA, Orlando Convention Center, Orlando. Call (866) 418-1423 or visit www.ice-x-usa.com. 7-8 — Optimizing Extrusion-Based Lamination and Coating Technology Seminar (Europe), Brussels. Hosted by AIMCAL. Call (803) 802-7820 or visit www.convertingschool.com. 10-13 — ASTM Committee C16 on Thermal Insulation Meeting, Anaheim, Calif. Hosted by ASTM International. Call (610) 832-9729 or visit www.astm.org/COMMIT/C16.htm. 11-12 — Dryer Technology Seminar, Madison, Wis. Hosted by University of Wisconsin. Call (800) 462-0876 or visit epdweb.engr.wisc.edu. www.process-heating.com • M a r c h 2 0 1 1
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Fans
The Way the
Wind Blows S
everal intrinsically different fan types are on the market, and each offers different performance characteristics. Consequently, if an engineer wants to achieve specific air movement patterns or has certain control requirements, it is vital for the system designer to understand the different fan types and control options that are available. Knowing whether your application requires high volumes of airflow with low pressure, or high pressure airflow with low volumes is just one of the questions to be answered in order to determine the correct
Selecting a fan type and fit by purpose increases efficiency and performance. By Mark Scribner, Air Control Industries Inc.
fan shape selection. This article will take a look at what a designer needs to know to make an informed decision.
Fan Types The most common fan types are axial flow, tangential, centrifugal and mixed flow. Axial Flow. This type has various blade shapes such as aerofoil, sickle, paddle and variable pitch. Axial fans are used for relatively high flow rates and low pressures with flow parallel to the axis of fan. They also have low power input. Axial flow fans generally are selected for simple extraction or cooling applications with very low system resistance. Examples include moving air from one large space to another (e.g., from factory to outside), an everyday desk fan and condenser cooling in refrigeration. Tangential. These barrelshaped fans have curved forward blades that are generally many times longer than any given diameter. Tangential fans tend to scoop Axial fans are used for relatively high flow rates and low pressures with flow parallel to the axis of fan.
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the air up and deliver it at relatively low pressure over a long length. Ideal for cabinet cooling or process air coverage, tangential fans have relatively low power required. The main advantage of tangential fans over axial fans is that they provide extremely smooth, laminar airflow over the whole frame width. This makes them suitable for applications such as air conditioning systems, air curtains, computer systems, instrument racks, convector fans, ovens, dehumidifiers and ventilators. Centrifugal. This type of fan typically has an impeller blade construction such as paddle, radial, backward curved and forward curved. Characteristics are low flow rates and high pressures with flow perpendicular to blower axis. Air enters around center of the fan and exits around the outside. Centrifugal fans with paddle impellers are used when debris will pass through the system because this configuration prevents any clogging. Fans with backward curved blades produce less air volume than axial units, but they generate considerably more pressure and are the least power-hungry in the centrifugal range. They also can be produced as multi-stage units to give even higher pressures. By comparison, centrifugal fans with forward curved blades develop the best airflow and pressure requirement in
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[email protected] www.process-heating.com • M arch 2011 15 1/23/08 1:14:54 |PM
Fans Axial
Centrifugal Air Exits With Centrifugal Force
Pressure Side Inlet
Inlet Inlet
Suction Side Backward Curved
Forward Curved
Radial Bladed
Mixed Flow Centrifugal fans offer low flow rates and high pressures with flow perpendicular to blower axis. Typical applications include air-handling units, process heating and cooling, electronic cooling and boiler combustion air.
size-by-size comparison, although they will require extra motor power. Typical applications for centrifugal fans include air-handling units, process heating and cooling, electronic cooling and boiler combustion air. Mixed Flow Fans. These designs combine the features of axial and centrifugal fans by employing the air movement techniques of both. Air enters the inlet side of the fans and exhausts in an axial route from the outlet side. The pressure development of the mixed flow is greater that an axial fan and is more akin to the centrifugal fan design.
Other Factors Designers must also take into consideration application-specific factors. These include: • The density of the air to be moved. • The air temperature. 16
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M a r c h 2 0 1 1 • Process Heating
The most common fan types are axial flow, tangential, centrifugal and mixed flow. This diagram illustrates the differences in airflow among the different types.
• Humidity. • The pressure required to achieve flow across a filter or pressure drop due to ducting. All ducting will have an effect on the air passing through a system, and this will nearly always take the form of a restriction to the flow. Therefore, all ducting will have an influence on pressure requirements. At the earliest stage in the design process, the ducting should be evaluated carefully and made as efficient as possible. This will reflect beneficially on the final design in the overall cost, the compactness of the fan and the running costs.
In reality, there are many factors that impact upon fan specification. Applications that demand particular air movement characteristics for cooling, exhausting, aerating, ventilating and drying should undergo a “system resistance” assessment. Only by evaluating all the impacting factors — flow resistance, power units, size and space envelope — is it possible to ensure maximum efficiency and reliability of both the fan and the equipment involved. Speed Controllers. Systems also can benefit from recent advances in variablespeed drive technology. These range from simple step-by-step to infinitely variable speed control coupled with feedback facili-
Fans Help List To help ensure that all aspects of fan sizing have been considered, the following checklist may be useful. Volume Flow Rate • Velocity required. • Does this take into account the worst case open area? • Density of the air being moved (temperature or different gas). In mixed flow fans, air enters the inlet side of the fan and exhausts in an axial route from the outlet side. The pressure development of the mixed flow is greater that an axial and is more akin to the centrifugal.
ties offering constant flow against variable resistance conditions. Single-phase supply can offer speed control, from simple manual thyristor phase control or automatic from a 0 to 10 V DC supply that could also incorporate sensors. Main single-phase input also will power units up to 550 W, which are brushless DC electronically commutated and can be infinitely controlled with a 0 to 10 V DC supply or PWM signal through a special control module that can incorporate a pressure sensor to give constant volume conditions. Three-phase supply availability will offer control capabilities ranging from simple step-by-step transformer speed control through to sophisticated systems based upon inverter drive units that will offer full control parameter integration.
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Pressure • Pressure required to generate desired flow through open area. • Pressure drop across filter. • Pressure drop due to ducting. Other Parameters to Consider • Any special hazards (flammable gas, corrosive agents, etc.). • Noise level restrictions. • Inlet and discharge configuration. • Electrical supply. Is speed control required?
Protect finned tube coils from corrosive atmospheres with Heresite’s baked phenolic coating. It is the proven choice in processes around the world for service in corrosive fumes and salt atmospheres. For Shell and Tube Heat Exchangers, Heresite can provide protection with the licensed Saekaphen Si series. Typically used in heat exchangers, condensers
• Physical size constraints. • Even flow across aperture. (If it is a large area then poor distribution could occur.) • Dwell time. Is the velocity across the filter giving desired dwell times? When selecting a fan, it is always worth talking to an industrial fan manufacturer who will advise you correctly. They might have encountered your problem before and can help you solve it. Fan manufacturers also can recommend another type of fan for your application and suggest possible suppliers, or work with you to reach a solution to solve your air movement problem. Specialist fan manufacturers can offer advice and, where necessary and when economies of scale permit, develop fans and blowers tailored to suit a unique application. PH Mark Scribner is general manager at Air Control Industries Inc., Windsor, Maine. For more information, call (207) 445-2518 or visit www.aircontrolindustries.com.
and evaporators, tube bundles can be protected from many acids, salts, water and alkaline services. Heresite coatings reduce maintenance costs with less downtime and permit the use of less costly alloys to reduce capital costs. Learn the whole story on corrosion resistance by contacting your local Heresite representative. 822 South 14th Street, P.O. Box 250 Manitowoc, WI 54220 Phone: 920-684-6646 • 800-558-7747 Fax: 920-684-0110 www.heresite.com E-mail:
[email protected]
www.process-heating.com • M a r c h 2 0 1 1
|
17
Heat Exchangers
Getting Energy from Waste Take a close approach for more power. Compact plate heat exchangers offer benefits for heat recovery applications.
E
nergy derived from waste heat is a sustainable resource and, if properly managed, can remain a renewable source of energy. Advances in the areas of heat exchanger sealing, pressing, strength and efficiency have helped to improve and optimize heat transfer efficiency. While the means to recover waste heat include a range of equipment, one type often used is heat exchangers. Heat transfer via compact heat exchangers, especially plate heat exchangers, delivers more power per square foot through a close temperature approach, making the technology power efficient. Plate heat exchangers operate with a smaller temperature differential (6T) than
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M a r c h 2 0 1 1 • Process Heating
By Klas Abrahamsson, Alfa Laval
many other heat transfer technologies. The close temperature approach in plate heat exchangers allows a high utilization of available temperature difference between the source and the sink. Also, in general, the higher turbulence in a plate heat exchanger results in a higher heat transfer coefficient. Consequently, less heat transfer area is required, and the turbulent flow helps ensure less fouling. Because plate heat exchangers use less space than other heat exchanger designs, users can install a larger turbine on the same installed footprint. This is directly related to a better utilization of the available temperature difference between the heat source and the heat sink. And, the closer the temperature is, the better. Compared with other heat exchanger technologies, plate heat exchangers provide relatively easy access for cleaning purposes. Their compact designs require minimal extra floor space for opening and the front panel is accessible. Because a single compact plate heat exchanger normally replaces larger — or even numerous — units, the
total effort to access the interior is reduced and requires less manpower. In alternate technologies, the flow is less turbulent; consequently, the risk of fouling may be greater. Other heat exchangers can require more fre-
Evaporators and Condensers Another benefit of plate heat exchangers is in the way the evaporators and condensers work. The refrigerant enters the evaporator at the bottom, then quickly flows through the channels to be superheated at the top of the evaporator prior to entering the turbine. The superheated refrigerant leaves the turbine and enters the condenser to be rapidly de-superheated and start condensing. The two-phase mixture condenses completely. The condensed liquid then drains from the heat exchanger channels.
Heat Exchangers Plate Heat Exchanger Efficiency
Shell-and-Tube Heat Exchanger Efficiency Temperature
Temperature
Heat Source (e.g., Geothermal source)
Heat Source Evaporator
Evaporator Work
Condenser
Condenser Heat Sink
Heat Sink (e.g., cooling tower) Entropy
Entropy
The close temperature approach in plate heat exchangers allows a high utilization of available temperature difference between the source and the sink.
In this diagram comparing shell-and-tube (left) and plate (right) heat exchangers, the dotted lines represent the space required to open and clean the units.
quent cleaning than plate heat exchangers. In a plate heat exchanger, the corrugated plate design results in high flow turbulence. The resulting high shear stress reduces fouling. As a result, plate heat exchangers normally operate three times
WEB EXCLUSIVE Plate Points Learn about some of the features that are available in plate heat exchangers such as wide-gap spacing, semi-welded plates and double-wall designs. READ MORE @ WWW.PROCESS-HEATING.COM
longer between cleanings than the technology they are replacing.
The swirling motion of the fluid retards fouling in the plate heat exchanger.
Recycled Energy
can provide features such as optimized heat recovery using less cooling and heating medium, increased cooling or heating capacity using less area and a savings in capital investment and installation due to compact size and light weight. Other potential benefits include lower operating costs with higher heat transfer efficiency, less fouling, less maintenance and increased uptime. PH
To get the most from operations, plants can recycle energy for a range of uses rather than producing or buying more — thus reducing fuel consumption and emissions while also reducing operating costs. Compact plate heat exchangers are light in weight, take up little space and can be installed and retrofitted in existing facilities. Many companies are already using compact heat exchangers in their operations. With rising energy costs and environmental concerns, others are considering the technology. Plate heat exchangers
Klas Abrahamsson is the director of energy and industrial markets with Alfa Laval, Warminster, Pa. For more information, call (866) 253-2528 or visit www.alfalaval.com. www.process-heating.com • M a r c h 2 0 1 1
|
19
Equipment Overview Ovens
I
ndustrial ovens run the gamut of configurations (batch, walk-in and continuous, to name a few), heating methods (infrared, convection and microwave, for example) and manufacturing processes (baking, heat setting or thermoforming). With so many suppliers offering a range of designs, how do you know where to start?
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Grieve Corp. www.grievecorp.com
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Hix Corp. www.ovens-dryers.com
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Thermal Product Solutions (TPS) T www.thermalproductsolutions.com
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Thermcraft Inc. T www.thermcraftinc.com
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Advance Systems Inc.
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Applied Test Systems Inc.
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Blue M Buhler Aeroglide C.A. Litzler Co. Inc. Catalytic Industrial Systems •
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Espec North America
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Fostoria Process Equipment, Division of TPI Corp. www.fostoriaprocessequipment.com
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HEATING METHOD
Continuous, Screw Conveyor
Continuous, Pusher Conveyor
Continuous, Fixture Conveyor
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CPM Wolverine Proctor www.cpmwolverineproctor.com
Batch, Bell
Batch, Bench
Continuous, Cross-Bar Conveyor
OVEN CONFIGURATION
You also can conduct your supplier search online! www.process-heating.com
Click on Equipment Overviews, then on Ovens.
Whether you want a booster oven or a completely new system, use Process Heating’s annual Equipment Overview on Ovens to find suppliers and save time specifying your oven. This matrix, available in print and online, will give you a head start on finding manufacturers with experience with your process.
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Packaging/Printing
Paper/Pulp/Converting
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Sheets/Webs (Continuous Material)
PRODUCT HEATED
Dual Fuel
ENERGY SOURCE
for the contact information you need: (847) 405-4020 or e-mail
[email protected]. Manufacturers listed in this Equipment Overview responded to a special mailing by Process Heating and do not necessarily represent the entire oven market. To be included in future listings, contact our directories department at (248) 244-6468 or
[email protected].
Aftermarket Coverage
You also can conduct your search for an oven at www.processheating.com. The online version includes advanced search capabilities: You set the criteria and let the search engine work for you. Hyperlinks take you to some manufacturers’ web sites. If you need more information than what we have specified here and on our web site, and you would like to talk to a manufacturer immediately, call or e-mail editor Linda Becker
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www.process-heating.com • M a r c h 2 0 1 1
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21
Equipment Overview Ovens
Glenro Inc.
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Global Technologies LLC
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Guspro Inc.
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Heat and Control Inc.
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Herr Industrial Inc.
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Harper International Harrop Industries Inc.
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Georgia Oven Co. Gerref Industries Inc.
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George Koch Sons LLC
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HEATING METHOD
Continuous, Fixture Conveyor
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Continuous, Drag Chain
Batch, Cabinet
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Continuous, Conveyorless
Batch, Bench
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General Fabrications Corp.
Continuous, Belt Conveyor
Batch, Bell
Furnace Brokers Inc.
Batch, Truck/Walk-In
Click on Equipment Overviews, then on Ovens.
Continuous, Cross-Bar Conveyor
OVEN CONFIGURATION
You also can conduct your supplier search online! www.process-heating.com
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Heyl & Patterson Inc. Hi-Heat Co.
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Industrial Heater Corp.
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Infratrol Mfg.
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International Thermal Systems
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Jensen Industries Inc. Kleenair Products Co.
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L&L Special Furnace Co. Inc.
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Lanly Co.
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www.process-heating.com • M a r c h 2 0 1 1
|
23
Product Highlights Wondering where to find products beneficial to your process? This department provides a number of new products each month and allows you to easily request more information. Simply call those companies in which you are interested, or visit those companies’ web sites using the published web addresses.
Heat Transfer Oil Systems The TF 350 Series includes both heating and combined heating/cooling units with capacities ranging from 3 to 24 kW. The line offers a range of heating capacities for controlling process temperatures up to 350°F (177°C). A small footprint and design make the line suitable for process applications where space is limited and continuous temperature control is required. Three system configurations (heating only, cooling only or heating and cooling) are each available with 5 and 10 gal/min flow rates. Mokon • (716) 876-9951 • www.mokon.com
Burner Control System The SBC 1.0A provides flame supervision, temperature control and sequencing for single-burner combustion control appli-
cations. The core of the system is the Kromschröder IFD 258 automatic burner control unit. The configurable, relay-logic panel can be configured to meet specific application requirements. Temperature control is selectable between 4 to 20 mA or position-proportional control actuators (and three-position step). Hauck Manufacturing Co. (717) 272-3051 • www.hauckburner.com
Combustion Gas Analyzer Model E4400 is designed for emissions monitoring as well as maintenance and tuning of combustion processes. A rugged design and “true NOX” capability makes the portable flue gas analyzer suitable for boiler, engine, furnace and other combustion applications. Features include four gas sensors, built-in printer, metal hose connections, rechargeable lithium ion battery pack and PC software with USB cable. E Instruments • (215) 750-1212 • www.e-inst.com
Quality Ovens For Low & High Temperature Ovens • Standard designs from table top to walk-in sizes • Custom design Ovens • Available in temperature ranges up to 1200˚F
For More Information Contact: THERMCRAFT, INC. • P.O. Box 12037 Winston-Salem, NC 27117-2037 PHONE: (336) 784-4800 • FAX: (336) 784-0634 E-Mail:
[email protected] Web Address: www.thermcraftinc.com
24
|
M a r c h 2 0 1 1 • Process Heating PH04104Therm.indd 1
3/26/10 2:02:41 PM
Product Highlights Selective Catalytic Reduction (SCR) System CataStak-FT utilizes the Trim-NOX urea injection system under a license and supply agreement with Combustion Components Associates Inc., Monroe, Conn. Designed to be used for emissions reductions from firetube boilers, the SCR system does not use ammonia; instead, it utilizes a urea solution. This system eliminates the need for endusers to store or handle anhydrous ammonia, which typically requires a hazardous materials safety program if stored in volumes greater than 500 lb. Nationwide Boiler Inc. • (800) 227-1966 www.nationwideboiler.com
Regenerative Thermal Oxidizers Flameless, dual-chamber regenerative thermal oxidizers (RTOs) provide 99 percent VOC abatement, according the manufacturer. Retox has a low pressure drop, dual-chamber ceramic heat exchanger rated up to 97 percent effective primary heat recovery efficiency for low system energy and operation costs. Flameless units are provided in compact, skid-mounted, pre-piped and prewired modules with flow rates from 1,000 to 80,000 cfm. Adwest Technologies Inc. (714) 632-9801 • www.adwestusa.com
Walk-In Oven Currently in use for curing latex, No. 825 has workspace dimensions of 54
x 72 x 72." The 500°F (260°C) electric walk-in oven has 30 kW power installed in Incoloy sheathed tubular heating elements. A 6,000 cfm, 5 hp recirculating blower provides horizontal airflow across the workload. Construction features include 4" insulated walls, 2" floor with truck wheel guide-tracks, aluminized steel exterior, Type 304, 2B stainless steel interior with continuously front-welded seams, cellular silicone rubber door gasket, stainless steel water cooling coil located in heat chamber, and a removable top-mounted heat chamber. Grieve Corp. • (847) 546-8225 www.grievecorp.com
Oxidizers Ovens Furnaces
Universal Thermocouple Connector Model UTC-USB accepts signals from nine thermocouple types (J, K, T, E, R, S, B, C and N). Through the USB port, the universal thermocouple connector displays actual temperature readings on your PC. Software for display, datalogging and chart recording is provided with the connector that lets users select the thermocouple type and units and then use a PC as a meter, chart recorder or datalogger. The device accepts both standard and miniature connectors and has built-in cold junction compensation and linearization. Omega Engineering (203) 359-1660 www.omega.com
¾ Oxidizers RTO Recuperative Catalytic Ovens & ¾ Furnaces Conveyorized Low Temp. & High Temp. Batch
Free Literature To request any of these free brochures, use the contact information in the literature item in which you are interested, or consult our ad index for the phone, fax, web and e-mail information.
Custom Electrical Control Panels This publication illustrates our experience as a UL 508A Certified Panel Shop in designing and building custom electrical control panels. It also presents a user-friendly guide to selecting a temperature control based on the performance required. Tempco Electric Heater Corp., Ph: 800-323-6859. www.tempco.com
936-273-3300
[email protected] www.epconlp.com www.process-heating.com • M a r c h 2 0 1 1
|
25
Product Highlights High Temperature Lubricant Biodegradable oil-based lubricant and coating paint is intended for use at temperatures from ambient to 1,832°F (1,000°C). Its lubrication is based on both organic and inorganic ingredients: a highflashpoint methylated seed oil (MSO) and a ceramic mixture of boron nitride, graphite and titanium dioxide, which are chemically inert lubricating materials. In laboratory testing, Keralon-B is an oily mixture at room temperature. It can be heated to 392°F (200°C) for 8 to 10 hr to create a dry-film lubricant. Zyp Coatings Inc. • (865) 482-5717 • www.zypcoatings.com
Multi-Stage System Integrates Drying and More Model 418-D integrates sanitary drying, cooling, classifying and fines collection in a single, pilot-scale unit. The multi-stage system includes a vibrating fluid bed dryer, a wiremesh fines collection screen, steamheated air supply and cyclone exhaust with blower. Other features include continuously welded and polished T-304 stainless steel in product contact areas. It is suited for processing starches, nuts, snack chips and other food and dairy products in
26
|
M a r c h 2 0 1 1 • Process Heating
low volumes and it meets USDA, FDA and 3-A Standards. Witte Co. Inc. • (908) 689-6500 • www.witte.com
Batch Oven Used for Hydrogen Embrittlement Gas-fired batch oven has four zones and a load capacity to heat 3,000 lb of steel. The heat treating oven has chamber dimensions of 6.5 x 28 x 6', a maximum operating temperature of 500°F (260°C) and normal operating temperature of 430°F (221°C). It is constructed with 4" tongue-and-groove panel assemblies and 20 gauge aluminized steel interiors and ductwork. The heating system includes a 850,000 BTU/ hr air heat burner with a motorized gas control valve, flame detector and flame relay with alarm horn. Wisconsin Oven Corp. • (262) 642-3938 • www.wisoven.com
Scotch Marine Firebox Boilers The Arrowhead of Scotch marine firebox boilers is expected to complement the company’s existing boiler roomrelated product offerings, according to the manufacturer. The boilers are offered in standard sizes from 10 to 100 hp at 15 psig steam and 30 psig water operating pressure. They will be no more than 34" wide. Superior Boiler Works (620) 662-6693 • www.superiorboiler.com
FREE IR Webinar Register Now at http://webinars.process-heating.com
Infrared Applications in the Real World March 23 | 2:00 p.m. EDT Want to save valuable floor space, heat products faster and increase production line speeds? Infrared could be your answer. Tune in to “Infrared Applications in the Real World,” a webinar presented by Process Heating in conjunction with the Infrared Division of the Industrial Heating Equipment Association, to find out how infrared technology can improve your application. You’ll be able to ask questions of the experts and hear their answers live. The 1-hour non-commercial webinar will focus on electric and gas infrared applications and help end users understand infrared essentials such as: • What infrared is. • How infrared works. • How infrared can improve your heat processing application.
• How to add infrared to an existing production line. • Typical electric and gas infrared applications.
And, don’t miss this webinar to learn how to save energy with infrared heating! Tom and John will answer your questions during the LIVE event, so be sure to register today!
Advertising Sponsors:
Speakers are from from the Infrared Division of the Industrial Heating Equipment Association. John Podach Southeast Sales Manager Fostoria Process Equipment
Go Mobile Use your smart phone to register for the Infrared Webinar. Go to http://gettag.mobi/ with your phone’s browser to install the free Microsoft Tag app. Then, point and snap your phone’s camera at the tag to the right to register online – instantly. The reader works on most current smart and advanced feature phones, including Windows Mobile (5.5 and above), iPhone, Blackberry, Symbian and J2ME.
Tom Bannos Project Manager Vulcan Catalytic Systems
Moderator Linda Becker Editor and Associate Publisher Process Heating Magazine
Register for FREE at http://webinars.process-heating.com Can’t attend live? Register to receive the on-demand version.
PH Classifieds
Send advertising copy to: Process Heating/Attn. Becky McClelland Phone: (412) 306-4355 • Fax: (248) 502-1076 E-mail:
[email protected]
Display Classified Rates: 1X $100 • 3X $95 • 6X $90 • 9X $85 • 12X $80
Equipment for Sale Significantly reduce your drying time
CAN-ENG FURNACES INTERNATIONAL LTD. z
LHS 40 Air Heater
z
Rebuilds z Retrofits z Combustion Controls z
Control Panels z Thermal Profiling z Ovens z Burners z Elements z
t: 905-356-1327
f: 905-356-1817
e:
[email protected]
www.can-eng.com
Contact: JOE SALIBA (ext:2058) z KIM IAMARINO (ext:2037) z ANNA ROLFE (ext:2056) Air Radiation Heater
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Locate the industrial equipment, components and services specifically used in applying, transferring, measuring, monitoring and controlling heat in the manufacturing operations that you need! • Search by Company Name or Product Category • Downloadable Product Spec Sheets • Alpha Company Listings • Live Web & Email Links • Product Photos
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28 | M a r c h 2 0 1 1 • Process Heating
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Name ____________________________________ Title ____________________________ Company __________________________________________________________________ Address ___________________________________________________________________ City/State/Zip _______________________________________________________________ Work Phone ( ) ______________________ Work Fax ( ) ______________________ E-Mail Address______________________________________________________________ By providing your email address and fax number, you're giving us permission to email or fax future notices to you. 0109SUB Mar-1103SUB If you do not wish to receive third-party email offers regarding information relevant to your industry, please check here. F
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12/18/08 12:05:59 PM
10
ARI Valve
(800) 933-8845
(770) 933-8846
www.arivalve.com
[email protected]
15
CPM Wolverine Proctor
(215) 443-5200
(215) 443-5206
www.cpmwolverineproctor.com
[email protected]
25
Epcon Industrial Systems
(936) 273-3300
(936) 273-4600
www.epconlp.com
[email protected]
26
Fostoria Process Equipment Division TPI (800) 495-4525
(423) 477-5721
www.fostoriaprocessequipment.com
[email protected]
10
General Combustion
(407) 290-6000
(407) 578-0577
www.gencor.com
[email protected]
11
Grieve Corp.
(847) 546-8225
(847) 546-9210
www.grievecorp.com
[email protected]
31
Grieve Corp.
(847) 546-8225
(847) 546-9210
www.grievecorp.com
[email protected]
2
Heatec
(800) 235-5200
(423) 821-7673
www.heatec.com
[email protected]
32
Heatec
(800) 235-5200
(423) 821-7673
www.heatec.com
[email protected]
17
Heresite Protective Coatings
(800) 558-7747
(920) 684-0110
www.heresite.com
[email protected]
7
Hix Corp.
(800) 835-0606
(620) 231-1598
www.ovens-dryers.com
[email protected]
12
Hubbell Electric Heater Co.
(800) 647-3165
(203) 378-3593
www.hubbellheaters.com
[email protected]
11
Karl Dungs Inc.
(763) 582-1700
(763) 582-1799
www.dungs.com/usa
[email protected]
12
Maxitrol Co.
(248) 356-1400
(248) 356-0829
www.maxitrol.com
[email protected]
6
MultiTherm
(610) 408-8361
(610) 408-8365
www.multitherm.com
[email protected]
3
Omega Engineering Inc.
(203) 359-1660
(203) 968-7192
www.omega.com
[email protected]
9
Paratherm Corp.
(800) 222-3611
(610) 941-9191
www.paratherm.com
[email protected]
15
Payne Controls
(800) 331-1345
(304) 757-7305
www.payneng.com
[email protected]
8
Precision Quincy Corp.
(815) 338-2675
(815) 338-2960
www.precisionquincy.com
[email protected]
12
Protection Controls
(847) 674-7676
(847) 674-7009
www.protectioncontrolsinc.com
[email protected]
13
Steelman Industries
(903) 984-3061
(903) 984-1384
www.steelman.com
[email protected]
8
Tek-Temp Instruments Inc.
(800) 259-4212
(215) 788-7737
www.tek-tempinstruments.com
[email protected]
24
Thermcraft Inc.
(800) 735-2856
(336) 784-0634
www.thermcraftinc.com
[email protected]
4
TPS-Gruenberg
(570) 538-7200
(570) 538-7380
www.thermalproductsolutions.com
[email protected]
www.process-heating.com • M a r c h 2 0 1 1
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29
®
Places & Faces The Richmond, Va., division of Super Radiator Coils, headquartered in Minneapolis, Minn., appointed Matt Holland vice presiHolland dent of operations to oversee the division’s sales, engineering and manufacturing operations.
ment of grain science and industry at Kansas State University. As a member of the adjunct faculty, Plattner will assist Plattner with teaching at K-State, as well as participate in department research and support.
Anderson Thermal Devices,
Temperature controls systems and chiller maker Conair, Cranberry Township, Pa., re-launched www.conairgroup.com. The revamped site incorporates improved navigation, full-content search tools, expanded and reorganized product information, articles and videos.
Hawthorne, N.J., revamped
www.andersonthermal.com to include a more user-friendly layout and expanded product descriptions. The site also includes new charts, graphs and product photographs as well as a technical papers section. ATD specializes in short- and mediumwave infrared solutions for the process heating industry.
Spooner Industries launched a fully interactive version of
www.spooner.co.uk that is available in more than 50 languages. The site was redesigned to provide clear navigation while providing users with information on custom-built air floatation, impingement and infrared ovens, coolers, stabilizers and oxidizers. The company promises new content on a weekly basis.
United Electric Controls, Watertown, Mass., introduced a web-based product selector that is intended to help web visitors choose from the company’s electro-mechanical and solid-state pressure, differential pressure and temperature switch offerings.
Brian Plattner, process engineering manager at Wenger Manufacturing Inc., Sabetha, Kansas, was appointed an adjunct instructor in the depart30
|
M a r c h 2 0 1 1 • Process Heating
DuPont, Wilmington, Del., acquired St. Louis-based MECS from affiliates of American Securities LLC, in an act that strengthens the DuPont clean technologies portfolio and provides access to additional high-growth markets, particularly in developing regions such as Asia Pacific, the Middle East and Africa. MECS provides process technology, proprietary specialty equipment and technical services for sulfuric acid producers.
PUBLISHING STAFF Senior Group Publisher, Manufacturing Group TOM ESPOSITO • (610) 436-4220 ext. 8530 Group Publisher • DOUG GLENN (412) 306-4351 •
[email protected] Publisher • ANNE ARMEL (847) 405-4043 •
[email protected] Associate Publisher and Editor • LINDA BECKER (847) 405-4020 •
[email protected] Contributing Editor • JOY LEPREE ANDERSON (856) 582-9554 •
[email protected] Art Director • COURTNEY FATHERS (248) 244-1292 •
[email protected] Production Manager • BETH MCCLELLAND (412) 306-4354 •
[email protected] Reprint Sales • JILL DEVRIES (248) 244-1726 •
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ADVERTISING SALES NORTH AMERICA • Sean Meaney • National Sales Manager 530 Humiston Drive • Bay Village, OH 44140 (440) 895-0919 • FAX (248) 502-1051 •
[email protected] NORTH AMERICA • Anne Armel • Publisher 155 N. Pfingsten Road, Suite 205 • Deerfield, IL 60015 (847) 405-4043 • FAX (248) 786-1441 •
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POSTAL LIST RENTAL ROBERT LISKA • (800) 223-2194 x726
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E-MAIL LIST RENTAL SHAWN KINGSTON • (800) 409-4443 x828
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AUDIENCE DEVELOPMENT
Wall Colmonoy, Madison Heights, Mich., released a brochure for its Spraywelder thermal spray application system. To receive a copy of the brochure, download technical data sheet SW-100 from www.
wallcolmonoy.com or call (248) 585-6400. Cleveland-based Eaton Corp. appointed Texas Steam and Louisiana Steam as manufacturer’s representatives and distributors for its line of Eaton strainers, gas liquid separators, and bag and cartridge filtrations products. Their territory includes Texas, Louisiana, Mississippi, and the southern counties of Arkansas.
Audience Development Coordinator • HAYAT ALI-GHONEIM Corporate Fulfillment Manager • MEGAN NEEL Corporate Audience Audit Manager • CATHERINE M. RONAN
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Associate Member
Bringing practical solutions to industry worldwide, Grieve has manufactured industrial ovens and furnaces since 1949. Whatever your requirement, a Grieve oven or furnace is likely the best solution. We are committed to continuing the tradition of personal involvement and quality products begun by our fathers. We welcome your inquiry. Douglas V. Grieve, President Frank P. Calabrese, Vice President
Jumbo Walk-In Oven
Got Maintenance? Plant operators are finding out the advantages of having their heaters serviced by Heatec on a regular basis. There are important benefits of having a contract for our service technicians to do preventative maintenance once or twice a year. An important benefit is safety. Our technicians make sure all limit devices are working properly. Insurance companies usually prefer that specialists, such as Heatec technicians, perform services related to safety. Fuel savings is another important benefit that results from maintenance that includes tuning the burner. Moreover, preventative maintenance usually eliminates unexpected heater
shutdowns at times that interrupt production. Preventative maintenance can usually be done without adversely affecting production schedules. Another benefit is usually a reduction in costs for each service call. This results from lower travel expenses when our technicians can make service calls at other plants in the same area. Moreover, many of our technicians reside in diverse locations that reduce travel to plant sites. Call today to find out what kind of service contract would work best for you.
HEATEC
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