Defining Innovation. backward curved FANs

Defining Innovation. high efficiency industrial backward curved FANs TYPE HIB BULLETIN 00-B May 20

HIB High-Efficiency Industrial Backward-Curved Fans Model HIB fans from Twin City Fan & Blower employ a high-efficiency backwardly-curved wheel in a ruggedly constructed fan housing. Designed to handle clean air or air with light dust loading, these fans are widely used on the clean side of baghouses, in highefficiency filtration, forced-draft, and other high pressure process supply applications. The curve below shows the HIB s characteristic high efficiency over a broad range and its non-overloading horsepower curve. Performance ratings shown in the curve are based on tests to AMCA Standard 20. HIB High-Efficiency Backward-Curved Wheel Standard Features High-efficiency, non-overloading wheel with continuously welded blades and a steel hub Statically and dynamically balanced rotor assembly Heavy duty self-aligning grease lubricated antifriction split roller bearings Heavy-gauge reinforced housing and bearing pedestal for vibration-free service All fans standard with flanged inlet and outlet, access door, shaft seal, and drain Sizes 360 and larger fans are equipped with a pie-shaped split in the casing to permit the wheel and shaft to be removed without disturbing the inlet and outlet ductwork Capabilities Fan sizes from 80 to 800 Wheel diameters from 20 2" to 90 3 4" High temperature construction to 800 F available HIB Design 20 Suitable to 20,000 FPM tip speed Pressure to 27" w.g. HIB Design 24 Suitable to 24,000 FPM tip speed Pressure to 40" w.g. Typical HIB Curve 30 20 SP 25 00 00 STATIC PRESSURE (IN. H2O) 20 5 0 BHP SE 80 60 40 BRAKE HORSEPOWER 80 60 40 STATIC EFFICIENCY (%) 5 20 20 0 0 5 0 5 20 25 30 35 40 CFM (IN 000's) 0 2000 Twin City Fan Companies, Ltd. Bulletin illustrations cover the general appearance of Twin City Fan & Blower products at the time of publication and we reserve the right to make changes in design and appearance at any time. 2 Twin City Bulletin 00

Arrangements Arrangement The usual choice for many V-belt drive applications. Wheel is overhung. Steel bearing pedestal to size 730. Size 800 requires a concrete pedestal. Check with the factory for V-belt drive applications larger than 250 HP. Arrangement Arrangement 3 SI Single width-single inlet fan with integral inlet box and independent bearing pedestals. The wheel is supported between two bearings. Arrangement 3 DI Double width-double inlet fan with inlet boxes on both sides and independent bearing pedestals. Arrangement 3 DI (shown with temporary pedestal support) Arrangement 8 Direct coupled with a flexible coupling. The motor pedestal can be custom fabricated out of steel for up to 400 HP. On larger HP units, use of standard Arrangement fan with a concrete pedestal for the motor is advisable. Variations in wheel diameters and wheel widths are available to match design performance at motor speeds. Characteristic curves showing performances at direct drive speeds are available on request. Arrangement 8 Accessories Inlet Box Dampers Pre-spin design, heavy-duty construction. The damper will spin the air in the direction of wheel rotation resulting in a savings in horsepower at reduced loads. Variable Inlet Vanes Works on the same principle as inlet box dampers. Nested and external type variable inlet vanes are available. Evasé Usually fabricated by customer as part of the ductwork. Fan outlet must be expanded to equal evasé area shown in the catalog to obtain rated performance. Same gauge as fan housing when purchased from the factory. Temperature and Vibration Detectors Thermocouples or RTDs can be installed on the bearings. Various types of vibration switches are available. High Temperature Construction 300 F to 500 F....Requires addition of shaft cooler and high temperature grease bearings 50 F to 600 F....Above modifications plus high temperature aluminum paint 60 F to 800 F....Above modifications plus modified pedestal design 3 Twin City Bulletin 00

Accessories Inlet Boxes Integral or detached type generously designed to minimize pressure drop. Inlet Box Positions For Centrifugal Fans Inlet Box Arrrangements Inlet Box Fan Subbase Arr. fan with detached inlet box. Can also be supplied in Arr. 8. Inlet Box Fan INLET BOX POSITIONS AND DESCRIPTIONS 45 Angular Down Intake 90 Horizontal Right Intake 35 Angular Up Intake 80 Bottom Up Intake 225 Angular Up Intake 270 Horizontal Left Intake 35 Angular Down Intake 360 Top Down Intake Reference line is the Top Vertical Axis through center of fan shaft. Position of inlet box and air entry to inlet box is determined from drive side of fan. Position of inlet box is designated in degrees clockwise from Top Vertical Axis as shown. Positions 35 to 225 in some cases interfere seriously with floor structure. Arr. fan with attached or integral inlet box. Can also be supplied in Arr. 8. Typical Inlet Box Dimensions A B Inlet Box Fan To Suit Fan F D C INLET SIZE A B C D AREA F SQ. FT 80 9.75 28.75 3.9 0.00.85.5 x.5 200 0.63 3.50 3.9.00 2.22.5 x.5 220.75 35.00 3.9 2.00 2.8.5 x.5 240 3.00 38.50 3.9 2.50 3.34.5 x.5 270 4.38 42.50 3.9 4.00 4.0.5 x.5 300 5.88 46.88 3.9 5.00 5.00.5 x.5 330 7.88 52.3 3.9 6.50 6. 2.0 x 2.0 360 9.38 57.38 3.9 20.06 7.52 2.0 x 2.0 400 2.38 63.38 3.9 2.88 9.20 2.5 x 2.5 450 23.38 69.38 4.9 24.50.00 2.5 x 2.5 490 25.88 76.87 4.9 26.69 3.60 2.5 x 2.5 540 28.50 84.50 5.25 28.75 6.30 2.5 x 2.5 600 3.50 93.50 5.25 30.88 20.00 3.0 x 3.0 660 34.88 03.50 5.25 33.44 24.60 3.0 x 3.0 730 38.50 4.50 6.25 37.00 30.00 3.5 x 3.5 800 42.50 26.50 6.25 40.38 36.80 3.5 x 3.5 Dimensions are in inches unless otherwise indicated. Dimensions are not to be used for construction. Concrete Arr. 3 SI fan with integral inlet box, centrally supported wheel, independent bearings pedestals to be installed on concrete pedestals. 4 Twin City Bulletin 00

Engineering Data Performance Correction for Temperature and Altitude The performance tables in this catalog are based on fans handling standard air at a density of 0.075 pounds per cubic foot. This is equivalent to 70 F at sea level (29.92" Hg barometric pressure). When specified performance is at a density different than standard, it must be converted to the equivalent standard conditions before entering the performance tables. The equivalent standard conditions can be calculated by using the Temperature and Altitude Correction Factors from the table below. Temperature and Altitude Correction Factors AIR ALTITUDE IN FEET ABOVE SEA LEVEL TEMP 0 000 2000 3000 4000 5000 6000 7000 8000 9000 0000 5000 20000 F BAROMETRIC PRESSURE IN INCHES OF MERCURY 29.92 28.86 27.82 26.82 25.84 24.90 23.98 23.09 22.22 2.39 20.58 6.89 3.75 70.000 0.964 0.930 0.896 0.864 0.832 0.80 0.772 0.743 0.74 0.688 0.564 0.460 00 0.946 0.92 0.880 0.848 0.88 0.787 0.758 0.730 0.703 0.676 0.65 0.534 0.435 50 0.869 0.838 0.808 0.770 0.75 0.723 0.696 0.67 0.646 0.620 0.598 0.490 0.400 200 0.803 0.774 0.747 0.720 0.694 0.668 0.643 0.620 0.596 0.573 0.552 0.453 0.360 250 0.747 0.720 0.694 0.669 0.645 0.622 0.598 0.576 0.555 0.533 0.54 0.42 0.344 300 0.697 0.672 0.648 0.624 0.604 0.580 0.558 0.538 0.58 0.498 0.480 0.393 0.32 350 0.654 0.63 0.608 0.586 0.565 0.544 0.524 0.505 0.486 0.467 0.450 0.369 0.30 400 0.66 0.594 0.573 0.552 0.532 0.53 0.493 0.476 0.458 0.440 0.424 0.347 0.283 450 0.582 0.56 0.542 0.522 0.503 0.484 0.466 0.449 0.433 0.46 0.40 0.328 0.268 500 0.552 0.532 0.53 0.495 0.477 0.459 0.442 0.426 0.40 0.394 0.380 0.3 0.254 550 0.525 0.506 0.488 0.470 0.454 0.437 0.42 0.405 0.390 0.375 0.36 0.296 0.242 600 0.500 0.482 0.469 0.448 0.432 0.46 0.400 0.386 0.372 0.352 0.344 0.282 0.230 650 0.477 0.460 0.444 0.427 0.42 0.397 0.382 0.368 0.354 0.34 0.328 0.269 0.29 700 0.457 0.44 0.425 0.40 0.395 0.380 0.366 0.353 0.340 0.326 0.35 0.258 0.20 800 0.420 0.404 0.389 0.375 0.362 0.350 0.336 0.323 0.3 0.300 0.290 0.237 0.93 Example: Assume a Model HIB 540 to handle 35,000 CFM at 3" SP at 500 F at an altitude of 2,000 feet.. Knowing the operating conditions are 500 F and 2,000 feet altitude, the correction factor can be found in the table above to be 0.53. 2. Divide the operating SP by this factor: 3" 0.53 = 25.3" SP This is the equivalent SP at standard air density. 3. Enter the HIB 540 performance table with 35,000 CFM and 26" SP to find the fan RPM and BHP. The fan RPM is 232. The brake horsepower is 83.82 BHP at standard conditions (83.82 BHP is also referred to as cold or starting brake horsepower). To determine the BHP at operating conditions, multiply the BHP at standard conditions by the correction factor from the table above (83.82 x 0.53 = 94.3). The BHP at operating conditions is 94.3 BHP. Derating Factors For High Temperature DERATING FACTOR TEMP. ( F) STANDARD STAINLESS STEEL STEEL 304 36 70.000 200 0.990 300 0.975 400 0.955 CONSULT CONSULT 500 0.930 FACTORY FACTORY 600 0.904 700 0.880 800 0.837 Standard steel construction is suitable for use in gas temperatures to 800 F. Aluminum wheels are suitable for temperatures to 250 F only. When a fan operates at temperatures higher than 70 F, the maximum RPMs allowable from the table on page 6 must be adjusted according to the derating factor found in the table at the left. Stainless steel wheels must be derated even at ambient operating temperatures. Please consult factory for stainless steel derating factors. 5 Twin City Bulletin 00

Engineering Data Material and Mechanical Specifications SIZE DESIGN SHAFT DIA. 80 200 220 240 270 300 330 360 400 450 490 540 600 660 730 800 MAX. HP V-BELT DRIVE* MIN. SHEAVE DIA.* MAX. HP DIRECT DRIVE MAX RPM** WHEEL GAUGES WR 2 VALUE BACK LB-FT PLATE BLADE RING WHEEL CONE 2 NOTES: * Minimum sheave diameter when using maximum horsepower motor. Check with factory on applications over 250 HP. ** Maximum fan RPM listed is for carbon steel construction. For stainless steel construction, contact the factory. Size 800 HIB is not supplied with conventional bearing pedestal. Instead, channel subbases are supplied. The subbase is to be mounted on concrete pedestal in the field. Fan weights include weight of channel subbase. HOUSING GAGE 20 2 3 6 30 5.5 40 3724 /4 0 Ga. --- 0 Ga. 9 7 24 2 3 6 50 5. 60 3839 5 /6 7 Ga. --- 0 Ga. 23 7 20 2 7 6 30 6. 50 3395 /4 0 Ga. --- 0 Ga. 28 7 24 2 3 6 50 5.6 75 3800 5 /6 7 Ga. --- 0 Ga. 33 7 20 2 3 6 50 7.3 60 3058 /4 0 Ga. --- 0 Ga. 42 7 24 2 7 6 60 6.2 75 3670 5 /6 7 Ga. --- 0 Ga. 49 7 20 2 3 6 60 8. 75 2778 /4 0 Ga. --- 0 Ga. 57 7 24 2 6 75 6.9 00 3333 5 /6 7 Ga. --- 0 Ga. 68 7 20 2 7 6 75 9.5 00 255 5 /6 0 Ga. 0 Ga. 0 Ga. 26 7 24 2 6 50 7.9 50 308 5 /6 7 Ga. 7 Ga. 0 Ga. 4 7 20 2 6 00. 50 2280 5 /6 0 Ga. 0 Ga. 0 Ga. 87 7 24 2 5 6 200 8.7 200 2737 5 /6 7 Ga. 7 Ga. 0 Ga. 24 7 20 2 6 00.4 50 2065 5 /6 0 Ga. 0 Ga. 0 Ga. 283 7 24 2 5 6 200 9.7 250 2478 5 /6 7 Ga. 7 Ga. 0 Ga. 339 7 20 2 5 6 50 2.6 50 863 5 /6 0 Ga. 0 Ga. 0 Ga. 390 7 24 3 7 6 250.4 300 2236 5 /6 7 Ga. 7 Ga. 0 Ga. 474 /4 20 3 7 6 200 2. 200 688 5 /6 0 Ga. 0 Ga. 7 Ga. 657 7 24 3 5 6 250 3.5 400 2026 3 /8 7 Ga. 7 Ga. 7 Ga. 857 /4 20 3 7 6 200 4.7 250 528 5 /6 0 Ga. 0 Ga. 7 Ga. 035 7 24 3 5 6 250.5 500 833 3 /8 /4 /4 7 Ga. 524 /4 20 3 5 6 250 4.2 300 386 3 /8 7 Ga. 7 Ga. 7 Ga. 953 7 24 4 7 6 400 4. 600 790 /2 /4 /4 7 Ga. 2405 /4 20 3 3 6 250 7.2 400 252 3 /8 7 Ga. 7 Ga. /4 3249 7 24 4 3 6 400 7.4 700 503 /2 /4 /4 /4 3932 /4 20 4 7 6 300 7.7 400 32 /2 7 Ga. /4 /4 5446 /4 24 4 5 6 400 5.6 80 358 /2 /4 5 /6 /4 5906 /4 20 4 7 6 300 2.0 500 029 /2 7 Ga. /4 /4 7834 /4 24 4 5 6 400 8.6 000 235 5 /8 /4 5 /6 /4 9476 /4 20 4 7 6 300 24.6 600 932 /2 7 Ga. /4 /4 507 /4 24 4 5 6 400 2.6 200 90 5 /8 /4 5 /6 /4 4309 /4 20 4 5 6 400 25.7 700 842 /2 7 Ga. /4 /4 720 /4 24 5 5 6 400 9.6 400 00 5 /8 /4 5 /6 /4 238 /4 Bare Fan Weights (Lbs.) FAN CLASS 20 CLASS 24 SIZE ARR.,9 ARR. 4 ARR. 8 ARR. 9F ARR.,9 ARR.4 ARR. 8 ARR. 9F 80 775 775 008 84 800 800 040 840 200 850 850 05 893 875 875 38 99 220 890 890 57 935 950 950 235 998 240 930 930 209 977 030 030 339 082 270 20 20 456 76 80 80 534 239 300 320 320 76 386 370 370 78 439 330 550 550 205 628 60 60 2093 69 360 980 980 2574 2079 2370 2370 308 2489 400 2480 2480 3224 2604 290 290 3783 3056 450 3020 3020 3926 37 3600 3600 4680 3780 490 3840 4992 4032 4460 5798 4683 540 4720 636 4956 5550 725 5828 600 6480 8424 6804 6590 8567 6920 660 7430 9659 7802 7900 0270 8295 730 9030 739 9482 9590 2467 0070 800 8880 544 9630 259 NOTES: Size 800 HIB is not supplied with conventional bearings pedestal. Instead, channel subbases are supplied. The subbase is to be mounted on concrete pedestal in the field. Fan weights include weight of channel subbase. Wheel Weights (Lbs.) FAN DESIGN SIZE 20 24 80 6 69 200 70 84 220 86 03 240 96 9 270 57 74 300 84 222 330 230 263 360 257 302 400 372 464 450 439 63 490 693 837 540 980 55 600 278 355 660 476 723 730 727 204 800 2033 257 6 Twin City Bulletin 00

Performance Data Wheel: 20.5" dia., 5.37 ft. circ. Outlet Area:.23 sq. ft. 80 HIB Inlet Area:.35 sq. ft. Evasé Outlet Area:.98 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 970 000 608.7 277 3.66 2758 400 752 2.42 2266 4.78 270 7.43 3066 0.2 3546 800 939 3.37 2398 6. 2793 9.4 352 2.42 3474 5.85 3762 9.37 4026 22.97 4334 2200 237 4.5 2574 7.8 2930.7 3256 4.80 3560 8.64 3847 22.67 42 26.80 4357 3.0 4728 2400 2263 5.32 2670 8.78 30 2.33 3324 6.3 365 20.4 389 24.35 453 28.7 4398 33.6 522 2600 2397 6.28 276 9.76 302 3.64 3400 7.59 3680 2.77 3944 26.3 497 30.67 4439 35.35 556 2800 2535 7.37 2850 0.76 396 5.05 3482 9.5 3752 23.50 4007 28.04 4250 32.75 590 3000 2676 8.62 2952.94 3292 6.54 3573 20.9 3830 25.37 4077 30.08 432 34.95 6304 3200 288 0.00 3068 3.35 3380 7.97 3667 22.77 396 27.42 453 32.26 438 37.3 6698 3400 2960.52 396 5.02 3469 9.46 3762 24.72 4007 29.63 4234 34.58 4455 39.79 7092 3600 302 3.9 3329 6.89 3567 2.5 3854 26.68 402 3.99 4323 37.4 7486 3800 3245 5.03 3466 8.97 3677 23. 3940 28.58 496 34.40 445 39.84 7880 4000 3388 7.03 3606 2.25 3799 25.39 403 30.63 4288 36.84 8274 4200 3533 9.23 3746 23.7 3928 27.95 432 32.96 4375 39.23 8668 4400 3678 2.6 3888 26.39 4062 30.78 4243 35.60 9062 4600 3823 24.9 4030 29.26 499 33.85 4365 38.64 Wheel: 22.5" dia., 5.89 ft. circ. Outlet Area:.48 sq. ft. 200 HIB Inlet Area:.67 sq. ft. Evasé Outlet Area: 2.37 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 2380 000 465 2.06 984 4.4 3332 400 598 2.93 2065 5.77 2462 8.98 2794 2.32 4284 800 769 4.07 287 7.38 2546.04 2873 5.00 366 9.4 3428 23.37 3669 27.72 5236 2200 950 5.45 2348 9.44 2672 3.50 2969 7.88 3245 22.5 3506 27.37 3748 32.36 397 37.44 572 2400 2066 6.44 2436 0.63 2746 4.90 303 9.50 3296 24.34 3546 29.39 3785 34.67 4009 40.06 688 2600 288 7.60 258.80 2829 6.49 300 2.24 3355 26.29 3596 3.58 3826 37.05 4046 42.69 6664 2800 235 8.94 2600 3.0 296 8.2 376 23.6 342 28.39 3654 33.90 3875 39.57 740 3000 2443 0.44 2694 4.45 3003 20.00 3259 25.28 3493 30.67 378 36.36 393 42.22 766 3200 2573 2.2 280 6.8 3084 2.74 3345 27.54 357 33.3 3787 38.98 3994 45.06 8092 3400 2703 3.97 298 8.2 365 23.54 3432 29.90 3655 35.83 3862 4.82 4062 48.07 8568 3600 2833 6.00 3040 20.48 3255 25.59 355 32.24 374 38.66 3943 44.9 9044 3800 2964 8.24 365 23.00 3356 27.97 3594 34.55 3828 4.6 4028 48.2 9520 4000 3095 20.67 3293 25.77 3468 30.76 3678 37.06 392 44.56 9996 4200 3227 23.33 342 28.76 3587 33.89 3770 39.87 399 47.44 0472 4400 3359 26.22 355 32.02 3709 37.3 3873 43.2 0948 4600 3492 29.35 368 35.5 3834 4.03 3984 46.78 Wheel: 25" dia., 6.54 ft. circ. Outlet Area:.8 sq. ft. 220 HIB Inlet Area: 2.02 sq. ft. Evasé Outlet Area: 2.96 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 2930 000 38 2.54 785 5.44 402 400 437 3.60 858 7. 225.05 254 5.8 5274 800 590 5.0 967 9.09 2290 3.59 2585 8.48 2849 23.59 3085 28.8 3302 34.8 6446 2200 752 6.70 2.62 2403 6.62 2670 22.0 299 27.7 354 33.70 3372 39.86 3572 46.09 7032 2400 855 7.90 290 3.08 2469 8.34 2726 24.00 2965 29.98 39 36.23 3405 42.69 3607 49.35 768 2600 965 9.33 2264 4.52 2543 20.28 2788 26.5 308 32.39 3235 38.90 3442 45.64 3640 52.58 8204 2800 2079 0.97 2337 6.00 262 22.39 2856 28.5 3077 34.97 3286 4.7 3485 48.70 8790 3000 294 2.8 242 7.77 2699 24.58 2930 3.0 34 37.74 3343 44.73 3536 5.99 9376 3200 23 4.88 256 9.87 2772 26.73 3007 33.87 32 40.78 3405 47.96 3592 55.47 9962 3400 2427 7.4 262 22.35 2845 28.96 3085 36.77 3286 44.07 3472 5.44 0548 3600 2544 9.63 2730 25.3 2925 3.45 360 39.67 3363 47.55 3545 55.25 34 3800 266 22.36 2843 28.23 306 34.39 323 42.5 344 5.7 362 59.29 720 4000 2779 25.35 2957 3.6 36 37.79 3306 45.58 356 54.78 2306 4200 2897 28.60 3072 35.27 322 4.57 3388 49.00 3587 58.32 2892 4400 306 32.5 388 39.24 333 45.78 3480 52.98 3478 4600 335 35.97 3305 43.54 3443 50.33 3579 57.45 Performance shown is for fans with an outlet evasé, with an outlet duct, and with free or ducted inlet. BHP as shown is a fan shaft brake horsepower and does not include belt drive losses. Regular type face = Design 20 Bold type face = Design 24 Underlined figures = Maximum static efficiency 7 Twin City Bulletin 00

Performance Data Wheel: 27.5" dia., 7.20 ft. circ. Outlet Area: 2.9 sq. ft. 240 HIB Inlet Area: 2.4 sq. ft. Evasé Outlet Area: 3.58 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 3550 000 99 3.08 623 6.58 4970 400 307 4.36 689 8.6 204 3.39 2286 8.39 6390 800 447 6.08 789.02 2083 6.48 2350 22.38 2590 28.56 2805 34.90 3002 4.39 780 2200 594 8.3 920 4.08 285 20.3 2428 26.67 2655 33.60 2868 40.83 3066 48.28 3248 55.84 8520 2400 688 9.59 992 5.85 2246 22.23 2479 29.08 2696 36.32 290 43.87 3096 5.7 3279 59.74 9230 2600 789.33 2059 7.59 233 24.58 2535 3.67 2744 39.22 294 47.09 329 55.25 330 63.7 9940 2800 892 3.3 226 9.40 2384 27.4 2597 34.53 2798 42.36 2988 50.53 369 59.00 0650 3000 997 5.55 2202 2.53 2455 29.80 2665 37.70 2857 45.75 3040 54.9 326 63.02 360 3200 203 8.05 2289 24.09 252 32.39 2735 4.05 292 49.45 3097 58.3 3267 67.23 2070 3400 2209 20.8 2385 27.2 2588 35.0 2806 44.56 2989 53.43 358 62.35 3322 7.69 2780 3600 235 23.82 2484 30.48 266 38.3 2874 48.06 3059 57.64 3224 66.94 3490 3800 2422 27.5 2587 34.26 2744 4.7 2939 5.53 330 62.03 3293 7.83 4200 4000 2529 30.77 269 38.36 2835 45.83 3007 55.23 398 66.39 490 4200 2637 34.73 2796 42.83 293 50.44 3082 59.4 3263 70.70 5620 4400 2745 39.03 2902 47.67 303 55.54 366 64.25 6330 4600 2854 43.7 3008 52.86 333 6.07 3257 69.73 Wheel: 30.375" dia., 7.95 ft. circ. Outlet Area: 2.56 sq. ft. 270 HIB Inlet Area: 2.92 sq. ft. Evasé Outlet Area: 4.33 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 4330 000 04 3.42 368 7.23 65.32 898 5.75 6062 400 07 4.96 429 9.57 697 4.80 927 20.8 233 25.73 2323 3.54 2502 37.63 7794 800 227 6.94 56 2.49 763 8.36 983 24.78 282 3.54 2363 38.36 2530 45.24 2688 52.33 2838 59.59 9526 2200 365 9.55 624 5.97 852 22.83 2057 29.88 2245 37.32 249 45.8 2582 53.30 2735 6.52 2879 69.77 0392 2400 440.8 684 7.95 903 25.29 20 32.85 2283 40.58 2453 48.74 262 57.25 2763 66.06 2905 74.92 258 2600 59 3.06 748 20.5 957 27.89 248 35.94 2325 44.5 2490 52.56 2645 6.33 2793 70.54 2933 79.94 224 2800 600 5.20 85 22.57 206 30.77 2200 39.26 237 47.97 253 56.76 2683 65.85 2826 75.20 2964 85.03 2990 3000 684 7.65 885 25.26 2077 33.83 2255 42.79 2420 5.93 2576 6.27 2724 70.73 2864 80.37 2998 90.36 3856 3200 770 20.4 959 28.30 24 37.5 232 46.50 2473 56.6 2624 65.97 2768 75.92 2904 85.86 4722 3400 858 23.53 2034 3.59 2208 40.76 2373 50.55 2528 60.58 2675 70.86 285 8.33 2948 9.77 5588 3600 947 26.99 22 35.26 2277 44.67 2436 54.84 2586 65.30 2728 75.96 2864 86.85 2994 97.86 6454 3800 2038 30.87 292 39.29 2349 48.98 250 59.42 2647 70.37 2785 8.46 297 92.77 7320 4000 229 35.0 2274 43.72 2424 53.73 2568 64.32 2709 75.64 2843 87.6 297 98.85 886 4200 222 39.76 2358 48.60 2499 58.73 2638 69.67 2773 8.23 2904 93.27 9052 4400 234 44.88 2443 53.89 2577 64.24 27 75.52 2840 87.28 2966 99.60 998 4600 2407 50.4 2530 59.70 2657 70.2 2785 8.74 2909 93.75 Wheel: 33.5" dia., 8.77 ft. circ. Outlet Area: 3. sq. ft. 300 HIB Inlet Area: 3.5 sq. ft. Evasé Outlet Area: 5.27 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 5270 000 920 4.7 24 8.8 497 3.78 72 9.7 7378 400 004 6.04 296.66 539 8.0 747 24.54 934 3.3 207 38.4 2268 45.75 9486 800 2 8.43 375 5.2 599 22.36 798 30.5 978 38.35 243 46.70 2295 55.2 2437 63.65 2573 72.49 594 2200 238.63 473 9.44 679 27.76 865 36.35 2036 45.44 294 55.0 2342 64.92 2480 74.86 26 84.95 2648 2400 307 3.64 528 2.88 726 30.79 905 39.96 2070 49.37 2224 59.28 2369 69.7 2505 80.35 2634 9.5 3702 2600 377 5.88 585 24.5 775 33.96 948 43.75 209 53.78 2258 63.97 2399 74.68 2533 85.88 2660 97.33 4756 2800 45 8.50 646 27.47 828 37.43 995 47.78 250 58.38 2296 69.5 2433 80.4 2563 9.56 2687 03.39 580 3000 527 2.47 70 30.76 884 4.20 2045 52.08 295 63.24 2336 74.57 2470 86.07 2597 97.80 278 09.90 6864 3200 605 24.83 777 34.46 942 45.23 2097 56.6 2243 68.38 2380 80.33 250 92.38 2634 04.56 798 3400 685 28.64 845 38.47 2002 49.58 252 6.52 2293 73.78 2426 86.26 2552 98.89 2673.65 8972 3600 766 32.87 96 42.95 2065 54.37 2209 66.73 2345 79.46 2474 92.46 2598 05.80 275 9.09 20026 3800 848 37.55 988 47.82 23 59.67 2268 72.30 2400 85.59 2525 99.07 2645 2.87 2080 4000 93 42.74 2063 53.27 298 65.36 2329 78.29 2457 92.09 2579 06.7 2695 20.39 2234 4200 205 48.45 239 59.9 2267 7.54 2393 84.85 255 98.89 2634 3.56 2388 4400 2099 54.65 226 65.63 2338 78.27 2459 9.96 2576 06.28 2690 2.24 24242 4600 284 6.45 2295 72.7 240 85.49 2526 99.52 2638 4.08 Performance shown is for fans with an outlet evasé, with an outlet duct, and with free or ducted inlet. BHP as shown is a fan shaft brake horsepower and does not include belt drive losses. Regular type face = Design 20 Bold type face = Design 24 Underlined figures = Maximum static efficiency 8 Twin City Bulletin 00

Performance Data Wheel: 37" dia., 9.69 ft. circ. Outlet Area: 3.79 sq. ft. 330 HIB Inlet Area: 4.3 sq. ft. Evasé Outlet Area: 6.42 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 6420 000 833 5.09 23 0.72 355 6.78 558 23.36 8988 400 909 7.36 73 4.20 393 2.94 582 29.93 75 38.6 907 46.77 2054 55.8 556 800 007 0.29 244 8.5 447 27.22 628 36.77 79 46.76 940 56.9 2077 67.0 2206 77.53 2330 88.40 424 2200 20 4.5 333 23.68 520 33.84 688 44.27 843 55.36 986 67.03 220 79.0 2245 9.2 2363 03.42 5408 2400 82 6.58 382 26.6 562 37.49 724 48.66 874 60.7 203 72.2 244 84.88 2268 97.96 2385.4 6692 2600 246 9.34 435 29.90 606 4.33 763 53.28 908 65.42 2044 77.94 272 9.04 2293 04.65 2408 8.60 7976 2800 33 22.53 489 33.42 654 45.56 806 58.24 946 7. 2078 84.22 2202 97.59 2320.55 2433 26.09 9260 3000 38 26.0 547 37.44 705 50.9 850 63.35 987 77.08 24 90.79 2235 04.75 235 9.8 246 34.0 20544 3200 452 30.22 607 4.89 757 55.05 898 68.98 2029 83.7 254 97.84 2272 2.56 2384 27.35 2828 3400 524 34.83 669 46.8 82 60.42 947 74.87 2075 89.84 295 04.98 230 20.49 2420 36. 232 3600 597 39.95 733 52.24 869 66.25 999 8.27 222 96.76 2239 2.6 235 28.82 2458 45.8 24396 3800 672 45.72 799 58.25 928 72.64 2052 88.0 272 04.26 2285 20.65 2394 37.5 25680 4000 747 52.02 866 64.79 989 79.60 208 95.4 2223 2.09 2333 29.6 2439 46.64 26964 4200 822 58.87 934 7.92 205 87.08 265 03.28 2276 20.45 2383 38.20 28248 4400 898 66.4 2004 79.78 25 95.24 2224.82 2330 29.26 2434 47.6 29532 4600 975 74.69 2076 88.46 280 04.0 2285 2.08 2387 38.9 Wheel: 4" dia., 0.73 ft. circ. Outlet Area: 4.65 sq. ft. 360 HIB Inlet Area: 5.33 sq. ft. Evasé Outlet Area: 7.89 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 7890 000 752 6.26 04 3.9 223 20.62 406 28.70 046 400 820 9.03 059 7.46 257 26.95 428 36.79 580 46.87 72 57.47 853 68.50 4202 800 909 2.65 23 22.76 306 33.45 469 45.5 66 57.42 75 69.94 875 82.52 99 95.29 202 08.49 7358 2200 02 7.44 203 29.08 372 4.59 524 54.45 663 67.98 792 82.30 93 97.4 2027 2.22 233 27.4 8936 2400 067 20.37 248 32.74 40 46.08 556 59.78 69 73.88 87 88.75 935 04.29 2047 20.37 252 36.47 2054 2600 25 23.78 295 36.7 450 50.83 592 65.56 723 80.52 845 95.80 960.8 2069 28.49 273 45.67 22092 2800 85 27.67 345 4.5 493 55.99 630 7.55 757 87.47 875 03.40 988 20.03 2094 37.08 296 54.95 23670 3000 247 32. 397 46.06 539 6.67 670 77.87 793 94.64 909.74 208 28.86 222 46.47 222 64.62 25248 3200 3 37.6 45 5.52 586 67.66 73 84.74 832 02.3 944 20.20 2050 38.8 252 56.56 26826 3400 376 42.82 507 57.56 636 74.29 758 92.09 873 0.40 982 29.6 2085 48.07 284 67.20 28404 3600 443 49.24 565 64.27 687 8.40 805 99.97 96 9.0 202 38.39 222 58.29 228 78.27 29982 3800 50 56.26 624 7.59 74 89.36 853 08.28 96 28.2 2063 48.37 26 69.0 3560 4000 577 63.92 685 79.70 796 97.9 903 7.27 2007 37.82 206 58.75 220 80.08 3338 4200 646 72.52 747 88.56 852 07. 955 27.05 2055 48.3 25 69.82 3476 4400 74 8.7 80 98.2 909 7.00 2008 37.50 204 59.0 298 8.63 36294 4600 784 9.97 874 08.7 968 27.84 2063 48.87 255 70.77 Wheel: 45.25" dia.,.85 ft. circ. Outlet Area: 5.66 sq. ft. 400 HIB Inlet Area: 6.49 sq. ft. Evasé Outlet Area: 9.6 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 960 000 68 7.6 99 6.08 08 25. 274 34.96 3454 400 743.00 959 2.23 39 32.83 294 44.83 432 57.3 560 70.08 679 83.44 7298 800 823 5.37 08 27.76 84 40.8 33 54.99 465 70.05 586 85.0 699 00.53 804 6.06 905 32.23 242 2200 97 2.25 090 35.42 243 50.64 38 66.34 507 82.83 624 00.30 734 8.46 836 36.55 933 54.94 23064 2400 967 24.83 3 39.90 277 56.06 40 72.84 532 89.96 646 08.04 754 27.9 855 46.68 950 66.25 24986 2600 09 28.93 73 44.67 34 6.93 442 79.78 56 98.04 672 6.75 776 36.2 875 56.59 969 77.46 26908 2800 074 33.73 28 50.04 353 68.24 477 87.7 592 06.55 699 25.97 80 46.3 897 66.89 989 88.52 28830 3000 30 39.2 266 56.3 394 75.04 53 94.82 625 5.37 729 35.94 828 56.84 922 78.2 202 200.40 30752 3200 88 45.28 35 62.79 437 82.40 552 03.9 660 24.63 762 46.55 858 68.46 950 90.73 32674 3400 247 52.9 366 70.20 482 90.43 593 2.20 697 34.46 796 57.36 889 80.30 979 203.69 34596 3600 307 59.9 48 78.29 529 99.24 635 2.66 736 44.95 832 68.79 923 92.89 200 27.24 3658 3800 368 68.50 47 87. 577 08.74 679 3.90 777 56.2 869 80.65 958 205.85 38440 4000 429 77.88 526 96.94 627 9.9 724 42.78 88 67.74 909 93.6 995 29.58 40362 4200 49 88.26 583 07.89 678 30.45 77 54.66 862 80.44 949 206.86 42284 4400 553 99.53 640 9.62 730 42.59 820 67.65 906 93.57 99 22.04 44206 4600 66.93 698 32.42 783 55.67 869 8.26 953 208.4 Performance shown is for fans with an outlet evasé, with an outlet duct, and with free or ducted inlet. BHP as shown is a fan shaft brake horsepower and does not include belt drive losses. Regular type face = Design 20 Bold type face = Design 24 Underlined figures = Maximum static efficiency 9 Twin City Bulletin 00

Performance Data Wheel: 50" dia., 3.09 ft. circ. Outlet Area: 6.92 sq. ft. 450 HIB Inlet Area: 7.92 sq. ft. Evasé Outlet Area:.7 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 700 000 66 9.27 83 9.55 003 30.63 6380 400 672 3.40 868 25.90 030 39.93 70 54.50 296 69.65 4 85.27 520 0.79 2060 800 744 8.7 920 33.72 07 49.70 204 66.97 325 85.25 435 03.68 537 22.40 633 4.56 724 6.7 25740 2200 828 25.77 986 43.7 24 6.63 249 80.76 363 00.84 469 22.4 568 44.09 66 66.3 749 88.77 28080 2400 874 30.2 022 48.49 55 68.28 275 88.63 386 09.6 489 3.60 586 54.72 678 78.62 764 202.46 30420 2600 92 35.20 06 54.46 88 75.36 304 97. 42 9.40 52 42.07 606 65.73 696 90.68 78 26.06 32760 2800 970 40.94 0 60.89 223 82.99 335 05.97 439 29.5 537 53.46 629 77.92 76 203.26 800 229.90 3500 3000 02 47.54 44 68.23 260 9.27 368 5.40 469 40.30 564 65.58 653 90.83 739 27.20 820 244.06 37440 3200 073 54.97 88 76.28 299 00.26 403 25.54 50 5.69 593 78.26 680 204.94 763 23.93 39780 3400 26 63.3 234 85.26 339 09.87 440 36.49 534 63.53 624 9.53 708 29.38 790 248.05 4220 3600 80 72.63 28 95.09 38 20.45 478 48.03 569 76.23 656 205.26 739 234.83 88 264.57 44460 3800 235 83.03 329 05.84 425 32.7 57 60.25 606 89.9 690 29.92 770 250.36 46800 4000 290 94.39 379 7.86 470 44.83 558 73.59 644 204.30 725 235.24 803 266.88 4940 4200 346 06.98 429 30.75 56 58.49 600 87.87 682 29.08 762 25.73 5480 4400 402 20.64 48 45.4 563 73.24 644 203.56 723 235.55 800 269.03 53820 4600 459 35.7 534 60.86 6 89.8 689 220.39 764 252.65 Wheel: 55.25" dia., 4.43 ft. circ. Outlet Area: 8.4 sq. ft. 490 HIB Inlet Area: 9.68 sq. ft. Evasé Outlet Area: 4.25 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 4250 000 559.29 754 23.8 90 37.3 046 5.89 9950 400 60 6.33 787 3.47 935 48.70 062 66.46 75 84.65 280 03.82 378 23.70 25650 800 676 22.86 835 4.09 972 60.56 093 8.68 202 03.77 302 26.28 394 48.92 48 72.22 564 96.25 3350 2200 752 3.44 895 52.60 020 75.07 33 98.27 237 22.88 333 48.78 423 75.59 507 202.53 586 229.52 34200 2400 793 36.75 928 59.4 048 83.2 57 07.96 258 33.6 35 60.23 439 88.39 522 27.3 60 246.78 37050 2600 836 42.87 963 66.33 078 9.75 84 8.47 28 45.33 372 73.04 458 202.5 539 232.26 66 263.3 39900 2800 88 49.95 000 74.3 0 0.09 22 29.2 306 57.79 395 87.03 478 26.63 557 247.5 633 279.85 42750 3000 927 57.95 038 83.02 44.28 242 40.72 333 70.84 49 20.57 500 232.45 578 264.55 652 297.54 45600 3200 975 67.7 079 93.08 79 22. 274 53.4 362 84.67 446 27.29 525 249.86 600 282.6 672 36.2 48450 3400 023 77.32 20 03.83 26 34.03 307 66.26 393 99.52 474 233.37 55 267.73 624 30.94 694 336.50 5300 3600 072 88.70 63 5.89 254 46.90 342 80.5 424 24.64 503 250.06 578 285.94 650 322.37 78 358.22 5450 3800 22 0.4 207 29.3 294 6.20 377 95.23 458 23.50 534 267.97 607 305.3 676 342.58 744 38.8 57000 4000 72 5.29 252 43.66 335 76.69 45 2.83 492 248.77 566 286.75 637 325.46 705 364.64 770 403.93 59850 4200 223 30.70 298 59.60 377 93.44 453 229.8 528 267.55 599 306.49 668 346.52 734 386.90 62700 4400 274 47.44 345 77.06 49 2.3 493 248.33 564 286.97 634 327.84 70 369.23 765 40.77 65550 4600 326 65.93 393 96.9 463 230.76 534 268.92 602 308.24 669 349.75 734 392.40 Wheel: 6" dia., 5.97 ft. circ. Outlet Area: 0.35 sq. ft. 540 HIB Inlet Area:.86 sq. ft. Evasé Outlet Area: 7.50 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 7500 000 505 3.83 682 29.28 822 45.70 945 63.60 24500 400 552 20.09 72 38.7 845 59.73 960 8.58 062 03.88 57 27.44 246 52.02 3500 800 6 28.0 755 50.44 878 74.4 988 00.2 087 27.5 77 55.02 260 82.76 339 2.54 43 240.54 38500 2200 68 38.74 809 64.49 923 92.36 025 20.86 8 50.69 205 82.57 286 25.32 362 248.43 434 28.93 42000 2400 78 45.25 840 72.79 948 02.5 047 32.87 37 63.86 222 96.96 30 23.27 376 266.78 447 302.73 45500 2600 757 52.8 87 8.43 975 2.68 07 45.59 58 78.3 240 22.9 38 248.04 39 284.87 46 323.03 49000 2800 798 6.59 905 9.39 005 24.53 096 58.63 8 93.77 26 229.46 336 265.77 408 304.04 476 343.26 52500 3000 840 7.53 940 02.29 035 36.75 24 73.3 206 20.05 284 248.02 357 285.86 427 324.97 493 364.83 56000 3200 883 82.77 977 4.64 067 50.9 52 87.93 232 226.90 307 266.43 379 306.83 447 347.22 59500 3400 927 95.45 04 27.83 00 64.62 83 204.60 260 245.09 333 286.56 402 328.36 469 37.5 63000 3600 97 09.35 053 42.7 35 80.7 24 22.74 289 264.23 360 307.53 427 35.08 492 395.79 66500 3800 06 24.92 093 59.08 7 98.20 247 240.58 39 284.45 388 329.49 453 374.65 70000 4000 062 42.30 34 77.09 208 27.8 280 260.6 350 305.80 47 352.59 48 400.05 73500 4200 08 6.24 76 96.90 246 237.76 35 28.86 382 328.46 447 376.93 77000 4400 54 8.79 29 28.68 285 260. 35 305.27 46 353.35 479 403.42 80500 4600 20 204.54 262 242.0 325 284.38 388 330.50 450 379.2 Performance shown is for fans with an outlet evasé, with an outlet duct, and with free or ducted inlet. BHP as shown is a fan shaft brake horsepower and does not include belt drive losses. Regular type face = Design 20 Bold type face = Design 24 Underlined figures = Maximum static efficiency 0 Twin City Bulletin 00

Performance Data Wheel: 67.5" dia., 7.67 ft. circ. Outlet Area: 2.58 sq. ft. 600 HIB Inlet Area: 4.47 sq. ft. Evasé Outlet Area: 2.30 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 2300 000 456 6.85 66 35.68 743 55.79 29820 400 498 24.45 643 47.20 763 72.75 867 99.38 960 26.85 045 55.22 26 85.43 38340 800 55 34.07 68 6.3 793 90.42 892 22.06 98 55.06 063 88.87 38 222.64 209 257.44 277 293.52 46860 2200 63 46.89 730 78.55 832 2.05 925 47.04 009 83.36 088 222.42 62 262.83 230 302.66 295 343.39 520 2400 647 54.95 757 88.35 855 24.8 944 6.25 026 99.30 03 239.76 75 28.98 243 325.4 307 369.07 55380 2600 682 64.09 785 98.89 880 37.33 966 76.97 045 26.95 20 258.8 90 302.20 256 347. 39 393.36 59640 2800 78 74.45 85 0.74 906 5.27 989 93.5 066 236.00 38 279.9 206 323.60 27 370.20 333 48.50 63900 3000 755 86.20 847 24.8 933 66.4 03 20.08 088 255.53 58 30.27 225 348.2 288 395.55 348 444.48 6860 3200 794 99.88 879 38.54 962 82.59 039 228.59 275.77 79 323.97 244 372.98 306 422.60 72420 3400 833 4.94 93 54.85 99 99.72 066 248.26 36 297.75 202 348.5 265 399.5 325 450.95 76680 3600 873 3.89 948 72.82 022 28.9 094 269.7 62 320.95 226 373.40 287 426.73 346 48.32 80940 3800 94 50.93 984 92.65 055 240.5 23 29.50 89 345.54 25 399.92 3 456.06 85200 4000 955 7.73 020 23.89 088 263.32 53 35.49 27 37.60 277 427.90 335 485.72 89460 4200 996 94.36 058 237.97 22 288.2 85 342.24 246 399.34 304 457.50 93720 4400 038 29.55 096 263.78 57 35. 27 370.29 275 427.99 332 488.82 97980 4600 080 246.83 35 292.8 92 343.65 250 400.60 306 459.76 Wheel: 74.25" dia., 9.44 ft. circ. Outlet Area: 5.28 sq. ft. 660 HIB Inlet Area: 7.57 sq. ft. Evasé Outlet Area: 25.80 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 25800 000 45 20.47 560 43.20 675 67.42 3620 400 452 29.44 584 56.97 694 88.2 788 20.23 872 53.20 950 87.94 023 224.0 46440 800 50 4.25 620 74.54 72 09.49 8 47.80 892 87.83 966 228.40 035 269.9 099 3.6 6 355.46 56760 2200 558 56.96 664 95.2 757 35.96 84 78.04 98 222.48 989 269.6 056 37.85 9 367.22 77 45.45 6920 2400 588 66.42 688 06.83 778 50.7 859 95.74 933 24.46 003 290.46 068 34.6 30 393.93 88 446.59 67080 2600 620 77.54 74 9.85 800 66.20 878 24.06 95 263.43 08 33.2 082 366.00 42 420.38 99 476.07 72240 2800 653 90.20 74 34.04 824 83.30 899 233.69 969 285.57 035 338.39 097 392.38 56 448.74 22 506.83 77400 3000 687 04.59 770 50.25 849 20.63 92 254.3 989 309.8 053 364.94 3 420.66 7 478.9 226 538.75 82560 3200 722 20.94 800 68.2 875 22.29 945 277.02 0 334.74 073 393.40 3 45.56 87 5.9 87720 3400 758 39.47 83 88.04 902 242.54 970 30.26 033 360.62 093 42.66 50 483.56 205 546.47 92880 3600 795 60.40 862 209.24 930 265.66 995 326.5 057 389.09 5 452.46 7 57.80 224 583.07 98040 3800 832 83.34 895 233.44 959 290.92 022 353.85 08 48.24 38 484.9 92 552.2 03200 4000 869 208.37 928 259.40 990 39.48 049 382.63 07 450.43 62 59.28 24 588.34 08360 4200 906 235.59 962 288.08 02 349.63 078 44.94 33 483.56 86 554.38 3520 4400 944 265.95 997 39.77 052 38.46 07 448.8 60 59.09 22 593.08 8680 4600 982 298.8 033 354.74 085 47.36 37 485.52 88 557.32 Wheel: 82" dia., 2.47 ft. circ. Outlet Area: 8.63 sq. ft. 730 HIB Inlet Area: 2.48 sq. ft. Evasé Outlet Area: 3.50 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 3500 000 376 25.02 507 52.70 62 82.60 4400 400 40 36. 529 69.59 628 07.43 74 47.02 790 87.27 86 229.99 927 274. 56700 800 454 50.43 56 90.74 653 33.69 734 80.08 808 229.46 875 279.00 937 329.20 996 38.29 05 433.47 69300 2200 505 69.36 60 6.00 686 66.27 762 27.65 83 27.22 896 328.94 956 387.62 03 447.79 066 507.32 75600 2400 533 8.27 623 30.32 704 83.48 778 238.99 845 294.80 908 354.7 967 46.20 023 480.40 076 545.37 8900 2600 562 94.87 647 46.50 725 203.24 795 26.4 86 32.28 922 382.3 980 446.93 034 52.82 086 58.40 88200 2800 592 0.40 672 64.24 746 223.48 84 285.04 878 349.09 937 42.65 993 478.30 047 547.93 098 69.33 94500 3000 623 28.3 698 83.86 769 246.6 835 3.39 896 377.77 954 445.97 008 53.57 060 583.8 0 657. 00800 3200 655 48.34 725 205.66 792 269.59 856 338.28 95 407.74 972 480.55 025 552.37 075 624.04 24 699.38 0700 3400 687 70.57 753 229.82 87 296.08 878 367.06 936 440.78 990 54.86 042 59. 09 666.53 39 744.7 3400 3600 720 95.74 78 255.64 843 325.04 902 399.8 957 474.46 00 552.56 060 63.09 09 72.69 55 792.49 9700 3800 754 224.6 8 285.32 869 355.60 926 432.4 980 5.98 03 592.45 080 674.85 27 758.47 72 842.32 26000 4000 787 254.26 84 37.5 897 390.38 950 466.89 003 550.42 052 633.07 00 79.2 46 806.28 90 893.82 32300 4200 82 287.99 872 352.45 925 427.09 976 505.89 026 589.93 075 678.25 2 766.0 65 854.46 38600 4400 856 325.74 904 39.58 954 467.3 003 548.4 05 634.25 098 724.47 43 85.84 86 907.60 44900 4600 890 365.43 936 433.5 983 509.85 030 592.93 076 680.26 22 773.90 65 866.70 Performance shown is for fans with an outlet evasé, with an outlet duct, and with free or ducted inlet. BHP as shown is a fan shaft brake horsepower and does not include belt drive losses. Regular type face = Design 20 Bold type face = Design 24 Underlined figures = Maximum static efficiency Twin City Bulletin 00

Performance Data Wheel: 90.75" dia., 23.76 ft. circ. Outlet Area: 22.84 sq. ft. 800 HIB Inlet Area: 26.35 sq. ft. Evasé Outlet Area: 38.60 sq. ft. 4" SP 8" SP 2" SP 6" SP 20" SP 24" SP 28" SP 32" SP 36" SP 38600 000 339 30.45 458 64.5 553 0.20 54040 400 370 44.06 478 85.25 568 3.99 645 79.99 74 229.60 778 28.80 837 335.0 69480 800 40 6.67 507.2 590 63.74 664 22.38 730 28.00 79 342.28 847 403.8 900 467.9 950 53.64 84920 2200 457 85.33 543 42.04 620 203.82 688 266.0 75 332.42 80 403.56 864 475.5 95 548.0 964 623.06 92640 2400 482 99.78 563 59.68 637 225.69 703 292.77 764 36.8 82 434.73 874 50.27 925 589.72 972 667.62 00360 2600 508 6.32 585 79.79 655 248.84 79 320.75 778 393.60 833 468.8 885 546.56 935 629.65 982 73.82 08080 2800 535 35.28 607 200.96 674 273.64 736 349.84 793 427.07 847 506. 898 587.4 946 67.5 992 758.39 5800 3000 563 56.99 63 225.5 695 30.70 754 380.68 80 463.43 862 546.29 9 629.52 958 75.65 003 805.05 23520 3200 592 8.82 655 25.78 76 330.70 774 45.2 827 499.85 878 588.09 926 676.30 972 766.02 3240 3400 62 209.5 680 280.99 738 362.30 794 450.70 846 540.39 895 63.62 942 725.7 986 86.99 38960 3600 65 240.20 706 33.50 762 398.55 85 488.87 865 58.69 93 677.68 958 773.54 002 872.84 46680 3800 68 274.9 733 349.73 786 436.84 836 528.25 885 626.0 932 726.63 976 826.97 54400 4000 72 32.56 760 388.57 8 478.99 859 573.03 906 673.52 95 776.49 994 88.00 6220 4200 743 354.38 788 43.80 836 523.44 882 69.83 928 724.70 97 829.87 69840 4400 774 399.78 87 479.88 862 572.3 907 673.26 950 777.64 992 886.98 77560 4600 805 448.93 846 53.4 888 623.98 93 726.95 973 835.08 Performance shown is for fans with an outlet evasé, with an outlet duct, and with free or ducted inlet. BHP as shown is a fan shaft brake horsepower and does not include belt drive losses. Regular type face = Design 20 Bold type face = Design 24 Underlined figures = Maximum static efficiency 2 Twin City Bulletin 00

TWIN CITY FAN & BLOWER MINNEAPOLIS, MINNESOTA 55442 DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST. 3 Twin City Bulletin 00

TWIN CITY FAN & BLOWER MINNEAPOLIS, MINNESOTA 55442 DIMENSIONS ARE NOT TO BE USED FOR CONSTRUCTION. CERTIFIED DRAWINGS AVAILABLE UPON REQUEST. 4 Twin City Bulletin 00

Typical Specifications Furnish and install as indicated on the plans, Twin City Fan and Blower model HIB industrial duty backwardly curved fans. HOUSING Fan housings shall be made of a heavy-gauge steel with continuously welded construction and braced with structural shapes to eliminate any resonant vibration and provide smooth operation. Sizes 360 and larger shall be equipped with a pie-shaped split in the casing to permit the wheel and shaft to be removed without disturbing the inlet and outlet ductwork. Casing split must be fully gasketed and bolted together to prevent any leaks. Flanged inlet and outlet, access door, shaft seal, and drain shall be provided as standard equipment. WHEEL Blade design shall be backwardly curved for high efficiency and have non-overloading performance characteristics. Blades shall be die-formed of special alloy material for strength and accuracy of contour and continuously welded to the wheel inlet cone and backplate. A heavy steel (not cast iron) hub shall be provided. Wheels shall be shrunk fit on the shafts, and hubs shall include puller holes for use in the event of wheel removal. Wheels shall be statically and dynamically balanced on precision electronic machines, as well as balance tuned after complete assembly. SHAFT Shafts are to be solid material selected for AISI 040 or 045 hot rolled steel, accurately turned, ground, polished and ring gauged for accuracy. BEARINGS Fans must be supplied with heavy-duty, self-aligning grease or oil lubricated anti-friction spherical roller bearings with split pillow block housings (bearing races not split) to provide long bearing life. Drive Cast iron, fixed pitch sheaves are recommended for best reliability. Variable pitch sheaves can be provided on applications up through 20 HP when specified. Drives and belts are located external to the fan casing and rated for 50% of the required motor HP. Finish & Coating The entire assembly, excluding the shaft, is thoroughly degreased and deburred before application of a protective coating to the entire assembly. The fan shaft is coated with a petroleum-based rust protectant. Accessories When specified, accessories such as belt guards, access doors, companion flanges, variable inlet vanes, outlet dampers, inlet boxes, inlet box dampers, evasés, evasé dampers, shaft coolers, shaft seals, inlet screens, drains, scroll and side liners, etc., shall be provided by Twin City Fan & Blower to maintain one source responsibility. Factory Test Run All fans prior to shipment shall be completely assembled and test run as a unit at the specified operating speed or maximum RPM allowed for the particular construction type. Each wheel shall be statically and dynamically balanced in accordance with ANSI/AMCA 204-96 Balance Quality and Vibration Levels for Fans to Fan Application Category BV-3, Balance Quality Grade G6.3. Vibration measurements shall be taken by electronic type equipment in the axial, vertical, and horizontal directions on each of the bearings. Records shall be maintained and a written copy shall be available upon request. GUARANTEE Manufacturer shall guarantee the workmanship and materials for its High Efficiency Industrial Backward Curved Fans for at least one () year from startup or eighteen (8) months from shipment, whichever occurs first. 5 Twin City Bulletin 00

Industrial & Commercial Fans Centrifugal Fans Utility Sets Plenum & Plug Fans Inline Centrifugal Fans Mixed Flow Fans Tubeaxial & Vaneaxial Fans Propeller Wall Fans Propeller Roof Ventilators Centrifugal Roof & Wall Exhausters Ceiling Ventilators Gravity Ventilators Duct Blowers Radial Bladed Fans Radial Tip Fans High Efficiency Industrial Fans Pressure Blowers Laboratory Exhaust Fans Filtered Supply Fans Mancoolers Fiberglass Fans Custom Fans A Twin City Fan Company Twin city fan & blower www.tcf.com 5959 Trenton Lane N Minneapolis, MN 55442 Phone: 763-55-7600 Fax: 763-55-760 MWG2/0