Robinson Fans, Inc.

HIGH-TEMPERATURE CENTRIFUGAL PADDLE WHEEL FANS Performance Ratings Robinson PW fans are furnished with radial bladed wheels specifically suited for applications involving continuous operation at temperatures from 70° F to 2000° F. PW units are often constructed of special alloy materials for high-temperature service, but are also used for low temperature operations. Other Robinson fans designed for high-temperature applications include axial flow and FC (forward curve) blade series. Robinson’s PW design is a result of thorough and exacting laboratory testing and documented performance ratings. These ratings were calculated on the basis of complete fan units, including wheel, casing and inlet section. Components are also furnished separately by Robinson, but the fan unit must be set up with wheel, shaft, casing, inlet and all other components in place to Robinson design specifications to achieve rated performance. Design Considerations PW fans may be furnished as either non-insulated or full-insulated units. PW fans are also offered with an insulated plug and non-insulated housing. In this type of construction, the non-insulated housing is usually mounted on the inside wall of the furnace or oven.' All Robinson PW Series are available in multiple fan arrangements. Flexibility in design also allows Robinson to offer both round and square plugs to accommodate a wide range of furnace requirements. Other capabilities include gas-tight designs. For reliable, efficient service, Robinson has always stressed the importance of preventive maintenance. Fan casings are therefore designed with either plug-type housings or split housings for accessibility to the wheel of servicing andor removal. Optional designs include inlet and outlet flanges, split housings, inspection doors, inlet or outlet dampers and insulation studs. Quality Control Dye-penetrant testing, ultrasonic testing, vibration analysis, X-ray testing, computer finite element stress analysis and, in some cases, magnetic-particle inspection are utilized to ensure that the PW series fans meet Robinson’s stringent quality-control requirements. Other steps taken to ensure long fan life include dynamic balancing of the wheel and shaft assembly on independent, computerized equipment. Full-scale mechanical testing is performed on the assembled PW unit (when possible) prior to shipment. Fan Repair and Field Service Robinson field service representatives are available for troubleshooting, field balancing and diagnostic inspection of fans and other types of rotating equipment. These personnel supervise certain on-site repairs or, if necessary, determine whether the unit must be factory repaired. Robinson repairs and rebuilds PW units as well as types of industrial fans, regardless of original manufacturer. In addition to fan repair as a cost-saving alternative, Robinson redesigns and upgrades existing air-moving equipment to increase capacity and improve efficiency. Industries Served Steel Mining Cement Ceramic Chemical Woodworking

HIGH-TEMPERATURE CENTRIFUGAL FORWARD CURVE FANS Robinson FC fans are furnished with forward-curve wheels that are ideally suited for applications involving continuous operation at temperatures ranging from 70° F to 2, 000° F. FC Series units are often constructed of special alloy materials for high-temperature service, but are used also for low-temperature operations. Other fan types designed and built by Robinson for high-temperature applications include axial flow, paddle wheel and radial blade series. Performance Ratings Robinson’s FC design is a result of thorough and exacting laboratory testing. Documented performance ratings from this work enable Robinson to provide equipment for quiet, efficient service over a broad performance range. Design Considerations FC fans may be furnished with either non-insulated or fully insulated units. FC fans are also offered with an insulated plug and non-insulated housing. In this type of construction, the non-insulated housing is usually mounted on the inside wall of the furnace or oven. All Robinson FC Series are available in multiple fan arrangements. Flexibility in design also allows Robinson to offer both round and square plugs to accommodate a wide range of furnace requirements. Other capabilities include gas-tight designs. For reliable, efficient service, Robinson has always stressed the importance of preventive maintenance. Fan casings are therefore designed with either plug-type housings or split housings for accessibility to the wheel for service andor removal. Quality Control Dye penetrant testing, ultrasonic testing, vibration analysis, x-ray testing and, in some cases, magnetic particle inspection, are utilized to ensure that FC Series fans meet Robinson’s stringent quality control requirements. Other steps taken to ensure long fan life include dynamic balancing of the wheel and shaft assembly on independent, computerized equipment. Full-scale mechanical testing is performed on the assembled FC unit (when possible) prior to shipment. Fan Repair and Field Service Robinson field service representatives are available for troubleshooting, field balancing and diagnostic inspection of fans and other types of rotating equipment. These personnel supervise certain on-site repairs or, if necessary, determine whether the unit must be factory-repaired. Robinson repairs and rebuilds FC units as well as all types of industrial fans, regardless of original manufacturer. In addition to fan repair as a cost-saving alternative, Robinson redesigns and upgrades existing air-moving equipment to increase capacity and improve efficiency. Primary Industries Served Steel Mining Cement Ceramic Chemical Woodworking Typical Air-Moving Applications Building ventilation Fume removal Dust removal Dust collection Pneumatic conveying Oven and dryer exhaust Combustion air Incinerators Heat recovery

HIGH-TEMPERATURE RECIRCULATION AXIAL FLOW FANS Single Direction and Reversing Flow Applications Robinson’s laboratory facilities are designed for both air performance and sound testing. Qualified lab personnel use state-of-the-art instrumentation to ensure accurate test results. The emphasis on quality at Robinson is backed by expert workmanship and a thorough quality control program. Dye penetrant testing, magnetic particle inspection, sonic testing, vibration analysis and x-ray testing are all utilized to ensure that Robinson-built fans provide long, reliable service. Robinson Fans engineers and custom builds high-quality air-moving equipment for industry. This expertise is supported by the latest computerized technology as well as by years of personal engineering evaluation and more than 110 years of fan-building experience. Each fan is precision engineered for its particular application to effectively and efficiently move air. The Robinson reputation for unique and superbly designed air-moving equipment is well demonstrated by its experience in building special alloy axial flow fans for continuous operation at high temperatures. Thermal expansion is a major consideration in the design of fans for atmosphere furnaces. Robinson axial flow units are designed for continuous operation at temperatures ranging from 70°F to 2, 000°F, depending on the application and the materials used in construction of the fan. Flexibility in design permits Robinson to offer both round and square plugs to accommodate a wide range of furnace requirements. Easy accessibility for preventive maintenance is an additional feature standard at Robinson. Research Lab: High Temperature Axial Flow Fan Testing In our laboratory facilities, R&D personnel have actually built furnace mockups to custom-test axial flow high-temperature fan prototypes. This testing is performed within certain furnace configurations with designs predicated on customer engineering and design data. Fan inlet conditions created by testing procedures simulate actual entry conditions on axial fans as they are installed in the furnace. Robinson also runs full-scale mechanical tests on units prior to shipment. Utilizing years of experience in building high-temperature fan equipment, Robinson is also involved in satisfying customer requirements in the area of fan repair and rebuilding . The Robinson RR program, greatly expanded by rebuilding facilities in Lakeland, Florida, and new large-capacity electronic dynamic balancing equipment, offers a highly favorable alternative to higher capital costs while retaining the same quality service and materials found in Robinson original equipment. Robinson repairs and rebuilds all types of industrial fans, regardless of original manufacturer. Robinson maintains an expert team of field service representatives who are available for troubleshooting, balancing andor on-site inspection of fans and other types of air-moving equipment. These personnel perform certain on-site repairs or, if necessary, determine whether or not the fan must be returned to a Robinson plant for repair or rebuilding . Repair and Rebuilding — A Cost-Efficient Alternative As an alternative to the higher costs of designing and building new axial flow equipment, the repair andor rebuilding of existing fans is an option many Robinson customers are choosing today. Robinson also redesigns and upgrades existing fan equipment for increased capacity and efficiency. The people at Robinson understand that downtime due to fan failure can mean lost revenue, so repairrebuilding projects are expedited through the plant. In response to the confidence shown in Robinson, as demonstrated by the number of customers sending fans to the plant for repair, Robinson has greatly expanded its RR program. Expanded production facilities, one of the largest dynamic balancing machines in the country and an additional repairrebuilding plant in Lakeland, Florida , have made Robinson perhaps the finest fan repair concern in the nation. Fan repair and rebuilding is not a sideline at Robinson; it is an important part of our business. Robinson engineers and production personnel have years of experience utilizing the same type of expert craftsmanship and heavy-duty materials used in new fan construction. Robinson is often able to recycle various original components from the old fan, such as the shaft or hub, to save the customer both valuable time and money. And, Robinson will also rebuild or repair any fan, whether it was built by Robinson or a competitive manufacturer If your fan shows signs of wear, corrosion, abrasion or unbalance, call to arrange a visit by Robinson’s field service representatives. Catching the problem before it becomes critical and repairing fan equipment during a scheduled shutdown can save time and money. Industries Served Steel Mining Cement Ceramic Chemical Woodworking Industry Applications Building ventilation Fume removal Dust removal Dust collection Pneumatic conveying Oven and dryer exhaust Combustion air Incinerators Heat recovery

HEAVY-DUTY BACKWARD CURVE FANS Robinson Backward Curve (BC) industrial fans represent a versatile fan series for quiet, high efficiency service. The Backward Curve design, for forced or induced-draft service, is used for a wide range of applications in many industries. BC fans are engineered and built to accommodate capacities to one million cfm and pressure ranges to 120 inches water pressure. BC Series fans from Robinson are currently in operation in cement, power, coal, lime and paper facilities throughout the U.S. and the world. Robinson builds BC wheels to 180 inches diameter and, as required, units are constructed of special alloy materials. Induced-Draft and Forced-Draft Service Heat Recovery Incineration Air Pollution Waste-to-Energy Boiler Operations Fluidized Bed Combustion Air Process Air ResearchPerformance Testing The BC fan is available from Robinson as a result of ongoing research and testing in Robinson’s lab facilities. BC prototype fans have been tested by Robinson on the basis of air performance, sound and vibration. Test data and field experience provide Robinson with the expertise to engineer and build fans for quiet, high-efficiency service. Engineering Robinson “engineered” fans are designed to satisfy the requirements of individual applications and service conditions. Finite element stress analysis and resonant frequency testing are utilized to engineer fans that are dependable for optimum performance. BC Repair and Rebuilding Robinson Fans offers extensive repair and rebuild services as an alternative to new or replacement equipment. Fan repair is cost effective Robinson determines and corrects causes of equipment failure. Robinson re-uses original components when possible. Robinson incorporates unique design features for improved efficiency. Wear, corrosion, component damage and material buildup lead to fan failure and costly system shutdown. A thorough maintenance program and periodic inspection of equipment help prevent problems. Robinson’s team of service representatives is available for fan inspection and emergency consultationservice. Primary Industries Served Steel Mining Cement Ceramic Chemical Woodworking Typical Air-Moving Applications Building ventilation Fume removal Dust removal Dust collection Pneumatic conveying Oven and dryer exhaust Combustion air Incinerators Heat recovery

PRE-ENGINEERED INDUSTRIAL AIR MOVING EQUIPMENT Robinson PE Fans are built with quality materials by skilled, experienced craftsmen for reliability and longevity. In a market which is increasingly calling for high quality, standard fans with great versatility and a competitive price, the PE Series fan is the answer. The PE (pre-engineered) Series fan is the culmination of over 100 years in the fan design and manufacturing business. The PE fan is a combination of one of three wheels in a standard housing. This combination allows quiet, efficient operation throughout a broad range of performance requirements. The choice of wheels allows the fan to operate in a variety of air stream conditions. Each of the three wheels - an airfoil, a backward inclined, and a backward curved - has been designed specifically for this PE application. All three wheel types have undergone extensive stress analysis. Robinson Fans, Inc. introduced the PE Series with one main goal in mind - to make the inquiry-to-shipment process as quick and easy as possible at a competitive price. Primary Industries Served Steel Mining Cement Ceramic Chemical Woodworking Typical Air-Moving Applications Building ventilation Fume removal Dust removal Dust collection Pneumatic conveying Oven and dryer exhaust Combustion air Incinerators Heat recovery

INDUSTRIAL DAMPERS FOR HIGH-SPEED FAN EQUIPMENT Robinson has provided fans and dampers for industry since 1892. In the early years, the company built equipment primarily for coal mine ventilation. In the 1930s, experience in high-temperature applications was acquired as a result of units built for brick-drying operations. As its customer list has expanded to steel, cement, aluminum, pulp and paper, fertilizer, glass, chemical, coal preparation and utility industries, Robinson’s experience and expertise in building dampers have steadily increased. Input from Robinson’s field servicemen enables the company to handle the hot, dirty and corrosive jobs as well as high-efficiency, clean-air applications. Today, this experience is available to industry in the form of long-lasting, low-maintenance dampers. Industrial Dampers are engineered for: Air performance control Power savings System isolationshutdown High tempdust-laden conditions Air dilution systems Low leakage applications Engineering Design Robinson’s staff of mechanical engineers uses the same technical expertise in the design of custom dampers that is so critical in the design of high-speed rotating fan equipment. Important design considerations include: Shaft deflection Torque requirements (for sizing actuator) Frame stiffness Bolt sizing and spacing Bearing selection Shaft seal design Low leakage seals (when required) Material selection Correct damper design involves use of laboratory test data and years of field experience in addition to textbook engineering and computer-aided calculations. Laboratory Testing An AMCA-registered laboratory with prototype fans of nearly every design makes it possible for Robinson to carefully test damper designs. In addition to air performance characteristics and effects on fan performance, prototype testing of damper torque under load is also done at Robinson. Test setups of new damper designs include cycling tests involving reliability of the actuatorlinkage system. Leakage tests use AMCA design ducts for accurate volume measurement at various pressure drops. Quality Assurance Robinson’s quality assurance program was developed as a result of involvement with large public utilities over the years. In-house procedures for handling “critical” dimensions, welding fit-up, weld procedures, etc., are well established. Nondestructive testing includes magnetic-particle and dye-penetrant inspection expertise as well as in-house X-raying of butt-welds . Hold points for customer witnessing andor inspection can be set up if desired on critical jobs. Critical path scheduling includes all such quality assurance procedures, which are integrated into the production schedule. Product Types Louvered Damper 15% leakage (typical). Special (1% leakage). Air-dilution type available. Parallel blade operation. Lower efficiency when dampered. Avoid if large percent run time at very low damper opening (high turn-down). Good for dirty air stream; no mechanism in air stream. Opposed blade available for fan outlet side (no HP savings). Synchronized operation for DWDI available. Radial Damper Good dampered efficiency. Minimizes rotating stall. Supported center or cantilever design. Adds to complexity if there are inlet boxes involved. Good for open inlet, SWSI. 10-15% leakage (typical). Operating linkage outside air stream. Vortex Damper Minimizes rotating stall. High efficiency in dampered condition. Mechanism outside air stream. Straight or conical inlet pieces can be used. 10-15% leakage (typical). Cannot be used without inlet box. No need to extend bearing centers for DWDI. Split design available. Synchronized operation for DWDI available. Operating linkage outside air stream. Variable Inlet Vane (VIV) Built as a part of the inlet piece. High efficiency when dampered. Minimizes rotating stall. No need to extend bearing centers on DWDI (shaft goes through). Tapered boxes are possible. Mechanism in air stream. Requires cone-shaped inlet piece design. 10-15% leakage (typical). Robinson Damper Repair and Rebuilding Complex damper components are often repaired to “like-new” condition at a fraction of the cost of a new unit. Robinson’s experience in fan and damper repair provides an alternate solution to difficult problems. When equipment fails in service, a plant slowdown or shutdown usually results. Robinson’s repair and rebuilding department emphasizes quick turnaround , completing and shipping first-quality repair jobs for on-time delivery. This priority commitment minimizes customer downtime and lost profits. Primary Industries Served Steel Mining Cement Ceramic Chemical Woodworking Typical Air-Moving Applications Building ventilation Fume removal Dust removal Dust collection Pneumatic conveying Oven and dryer exhaust Combustion air Incinerators Heat recovery