DF / DFB / DFCDOUBLE WIDTH – DOUBLE INLETFORWARD CURVED FANSFOR ORIGINAL EQUIPMENT MANUFACTURESSERIES 1600

Catalog 6131

1/98

2

APPLICATIONS AND AVAILABLE TYPES

DF centrifugal forward curved Fan Assemblies, Kitsand Parts are designed to furnish original equipmentmanufacturers (OEM’s) with low cost, efficient,dependable air handling components. Widely usedand accepted throughout the industry, these fans arethe standard of comparison for many applicationsincluding:• Ovens & Dryers • Finishing Systems• Heat Exchangers • Washers• Heating & • Orchard Spraying

Ventilating Units Equipment• Cooling Towers • Centrifugal Unit Heaters• Air Conditioning Units • Evaporative Coolers• Evaporative Condensers • Air Curtains

DF fans furnish the original equipment manufactur-er with the variety necessary to match all require-

ments.A wide range of sizes are available with volumes

from 150 to 88,000 CFM, static pressure to 8” w.g.,and temperatures to 750˚F with steel construction and1000˚F with stainless steel construction.

Fan parts and Kits suited for multiple arrangementsor complete ready-to-install assemblies can be sup-plied to furnish maximum capacity in minimum space.

Many finishes and metals are available for protec-tion against corrosive conditions.

All fans can be constructed from mill galvanizedsteel (standard), stainless steel, aluminum, monel (nick-el-400) and other metals.

DF fans feature typically heavy DF Fan Servicesconstruction for assured performance and long trouble-free life. All fan wheels are balanced both staticallyand dynamically.

DF - DFB - DFC DOUBLE INLET FANS

Type DFB. For more compact installations — moderateoutlet velocities — minimum shaft diameters.• Centrifugal forward curved design for quiet operation.• Double inlet wheels for single or multiple fan arrangements. • Eleven standard sizes: 6-1/2” through 26” diameter.• Typically lower efficiency than DFC.

Type DFC. Wider housing for low outlet velocity require-ments — typically higher efficiency than type DFB.• Centrifugal forward curved design for quiet operation.• Double inlet wheels for single or multiple fan arrangements.• Eleven standard sizes: 9-3/4” through 32-1/2” diameter.• Wider housing than Type DFB, but same side view

dimensions and fan wheel.

DOUBLE INLET FAN TYPES

FAN PARTS — Components for assembly in cus-tomer’s equipment: wheels and housings, wheels only,housing only, housing sides and cutoffs, coolingwheels, cooling cones, etc.

FAN KITS — Ready to assemble in customer’s equip-ment including: wheels, housings, shafts, bearings,cooling wheels and cooling cones.

DFB - DFC UNITARY FAN ASSEMBLIES —Complete fan assembly consisting of one (1) doubleinlet wheel, housing, steel shaft, cast iron pillowblockbearings, and painted steel frame. Available in all sizesof Type DFB Fans and DFC Fans for pressures toapproximately 1-1/2” SP. Custom assemblies are avail-able.

DFB - DFC DUPLEX FAN ASSEMBLIES —Complete fan assembly consisting of two (2) doubleinlet wheels and housings on a common steel shaft,with cast iron pillowblock bearings, and a commonpainted steel frame. Size 2 Type DFB Duplex and sizes1-3/4 through 2-1/2 Type DFC Duplex fan assembliesconsist of two complete fans with shafts and frames,coupled with a flexible gear coupling. Custom assem-blies are available.

FAN ASSEMBLIES - KITS - PARTS

DFB UNITARY ASSEMBLY DFB DUPLEX ASSEMBLY

FEATURES OF CONSTRUCTION

3

Sizes 1/2 through 1-1/4 — 48 die formed bladeseither side of centerplate, with integral tenons onblade ends. Tenons project through slots in rims andcenterplate and are staked in place.

Sizes 1-3/8 through 2-1/2 — 60 die formedblades either side of centerplate (48 blades, sizes 1-3/8 and 1-1/2 ). Blades have flanged ends whichare riveted to centerplate and rims.

Standard Hubs are cast iron, “Huck Bolted” tocenterplate. Available in all English and metric bores,with or without keyway.

Standard Housings are fabricated from heavygauge mill galvanized steel and spot welded togetherfor long service and freedom from vibration. Inletsare die-formed or spun in housing sides. Wheels areinserted in housings through outlet. Housing design isbased on laboratory tests for maximum efficiencycompatible with compactness. Sizes 1/2 through 1-3/4 have scroll sheet spot welded to housing sides.Larger sizes employ a standing seam scroll joint spotwelded to housing sides.

Standard Construction — Mill galvanized (zinc-grip) steel construction with cast iron hub. Maximumtemperature 500˚ F.

High-Temperature Construction — Steel construc-tion with cast iron hub, painted with one coat of blacksilicone based paint. Maximum temperature 750˚ F.

Spark Resistant Construction — Ferrous and non-ferrous metal combinations using aluminum, andmonel to meet AMCA “A”, “B”, or “C” constructionrequirements.

Aluminum Construction — Available for wheelsand housings for spark-resistant applications witheither cast iron or aluminum hubs.

Stainless Steel Type 304/316 — Both wheels andhousings are available for corrosive and/or high tem-perature applications. Maximum temperature 1000˚ F.

Monel (Nickel-400) Wheels and housings avail-able. Monel wheels are also available for spark-resist-ant applications where pressure or temperature pre-cludes use of aluminum.

FINISHES AND SPECIAL METAL CONSTRUCTION

Uni-Combustion fan assemblies and fan parts,incorporating SWSI centrifugal forward curve bladedwheels in fourteen (14) diameters from 6-1/2”through 32-1/2”, are designed for industrial use, suchas supplying combustion air for burner applications.Available in Arrangement 4. Complete assembliesand / or parts for incorporation into various systems.Inlet volumes from 200 to 24,000 CFM at static pressures to 10” W.G.

* ASK FOR BULLETIN 18001

TYPE UNI-COMBUSTION FANS*

TYPE DFB HOUSING

Note: The Type DF forwardcurved blade wheel is usedinterchangeably in type DFBand DFC housings.

DF WHEEL WITH REINFORCINGRINGS AND BRACE RODS

DF WHEEL

TYPE DFC HOUSINGS

Size 3/4 thru 1-3/4

UC WHEEL ARRANGEMENT4U ASSEMBLY

ARRANGEMENT4E ASSEMBLY

Size 2, 2-1/4, 2-1/2

4

UNITARY FAN SELECTION

FAN TYPE SELECTIONType DFB — For slow speed, more compact, moderate

outlet velocity requirements.Type DFC — For slow speed, quiet, lower outlet velocity

requirements, typically higher efficiencies.

FAN SIZE SELECTIONThe Size Selection Guide shows the normally used

ranges over which DF Fans perform satisfactorily.Example in use of Size Selection Guide — Select DF

fans for a 2-fan air conditioning unit, having a volume ratingof 6,600 to 9,000 CFM with total static pressures rangingfrom 1/2” to 2”.1. Since this is to be a 2-fan unit, each fan handles 3300 to

4500 CFM: average = 3900 CFM.2. From Size Selection Guide at 2” SP for an AC Unit appli-

cation, recommended OV = 1,100 to 2,000; Avg. = 1,550ft./ min.

3. Approximate required fan outlet area = Ave. CFM = 3900 = 2.52 sq. ft.

Ave. OV 1500

4. From the Table of Outlet Areas listed in Selection Guide,the nearest selection would be a 1-1/8 DFC having anoutlet area of 2.62 sq. ft.

5. Check the actual outlet velocities for the full desired rangeof volumes and pressures to see if these come within therecommended limits.

Min. Volume = 3,300/fan; OV = 1,260 - OK at max. 2” SP.Max. Volume = 4,500/fan; OV = 1,720 - Just slightly aboverecommended max. of 1,700 at 1/2” SP.

NOTE: Other possible selections falling within recommended limits would be 1-1/8 DFB, or 1-1/4 DFB

FAN PERFORMANCE DETERMINATIONThe capacity tables on pages 7 through 27 show per-

formances for one double width, double inlet (DWDI) fan atstandard air density (.075 lb./cu. ft.). When multiple fans areused in parallel, the CFM and BHP shown in the tables mustbe multiplied by the number of fans.

Approximate performance for single width, single inletfans (SWSI) is obtained by dividing the CFM and BHP shownin the capacity tables by 2.

When air density is other than standard, correction mustbe made to the performance shown in the capacity tables.

Where CFM and SP are specified at other than standarddensity, the specified static pressures must be multiplied bythe density factor to obtain the equivalent SP. Equivalent SPand specified CFM are then used to enter the capacity tablesto obtain RPM and equivalent BHP. BHP at the specifieddensity equals equivalent BHP divided by density factor.

Density factors are shown in the following table.Combined density factor for temperatures and elevation isobtained by multiplication of the separate factors.

DENSITY FACTORSTemp Dens. Temp Dens. Temp Dens. Temp Dens. Elev. Dens. Temp Density factor at % Relative Humidity˚F. Factor ˚F. Factor ˚F. Factor ˚F. Factor Ft. Factor ˚F. 25% 50% 75% 100%

-75 0.726 125 1.104 325 1.481 525 1.859 0 1.000 70 1.003 1.005 1.007 1.010-50 0.774 150 1.151 350 1.528 550 1.906 1000 1.037 100 1.062 1.071 1.077 1.083-25 0.821 175 1.198 375 1.576 575 1.953 2000 1.076 125 1.118 1.133 1.147 1.162

0 0.868 200 1.245 400 1.623 600 2.000 3000 1.116 150 1.181 1.210 1.242 1.272

25 0.915 225 1.293 425 1.670 625 2.050 4000 1.158 175 1.253 1.312 1.379 1.44550 0.962 250 1.340 450 1.717 650 2.090 5000 1.202 200 1.344 1.461 1.597 1.75270 1.000 275 1.387 475 1.764 675 2.140 6000 1.248

100 1.057 300 1.434 500 1.811 700 2.190 7000 1.296

EXAMPLE: Compute the performance of a size 1-3/8 type DFB DWDI duplex fan at 10,000 CFM, 1” SP at 200˚ F, 5,000 ft. elevation: 1. Density factor for 200˚ F and 5,000 ft. altitude = 1.245 x 1.202 = 1.496 (round to 1.5)2. Equiv. SP = SP at specified condition x Density Factor = 1.0” x 1.5 = 1.5”.3. From Capacity Table, page 13, for 10,000 CFM and 1.5” Equiv. SP, we find that RPM = 711 and Equiv. BHP = 4.15.

BHP at specified condition = Equiv. BHP = 4.15 = 2.77Dens Factor 1.5

For high temperature drying or for evaporative applications, Density Factor may be computed as follows:

1. Humidity Ratio (W) = Lbs. Water / Hr. Evaporated CFM at Std. Conditions x 4.5

2. Density at Condition (lbs/cu. ft.) = (1 + W) X 1 X 1 (13.33 + 21.4 W) Dens. Factors for Temp Dens. Factor for Elev.

Where (W) is from (1) and Density Factors for Temperature and Elevation are from above table.

3. Density Factor = .075 lbs. / cu. ft Total CFM at Condition = (CFM at std. conditions x 4.5) + (lbs. water / hr. evaporated) Density at Conditions Density at Conditon x 60

SIZE SELECTION GUIDEStatic Quitest Most Economical Outlet Area

Pressure Range for Range for in sq. ft.In. W.G. Air Handlers Industrial Units

Fan Type TypeMin Max Min Max Size DFB DFC

1/4 800 1600 1/2 0.361/2 800 1700 1200 2200 5/8 0.533/4 900 1800 1400 2400 3/4 0.88 1.04

1 900 2000 1600 2600 7/8 1.34 1.621 1/2 1000 2000 1800 2800 1 1.53 1.852 1100 2000 2000 3000 1 1/8 2.22 2.62

2 1/2 1200 2200 2100 3200 1 1/4 2.44 2.883 1300 2400 2200 3300 1 3/8 3.00 3.523 1/2 1600 2600 2300 3400 1 1/2 3.53 4.16

4 1800 2800 2500 3500 1 3/4 4.77 5.694 1/2 2000 3000 2600 3600 2 6.23 7.395 2200 3200 2800 3800 2 1/4 9.35

6 2400 3600 3000 4200 2 1/2 11.52

DF - DFB - DFC FAN SELECTION

5

CORRECTION TO FAN PERFORMANCE FORAXIAL CLEARANCE IN ENCLOSURE

Where fans are crowded within housed enclo-sures, so that the air flow space between fan housingand enclosure is lessthan one wheel diam-eter, fan performanceis reduced from thatshown in the capacitytables. Correctionmust be made bymultiplying theCapacity Table valuesby the factors shownin the following table.

Where Height (H) exceeds 2-1/2 wheel diameters,the indicated increase in RPM and BHP due to clear-ance will be 1/2 that shown in table; i.e. 1.07becomes 1.035, etc.

The above factors give average values; for preciseratings it is recommended that the complete air han-dling cabinet be tested in accordance with the AMCAStandards.

Max. Wheel RPM = Max. Tip Speed Wheel Circum.

Max. Temperature for complete standard fans = 150˚ F.

Max. Temperature for standard wheels and housings = 500˚ F.

FAN MOTORSWhere motors larger than 30 HP are used across

the line, NEMA design B (part winding) motors arerecommended.

Each fan wheel in multiple wheel installations willwithstand starting and running torques of motors ofabove characteristics when the fan speed and horse-power for each wheel are not in excess of the valuesshown in the capacity tables for the particular designwheel involved.

Extreme care must be used in multiple installa-tions to provide ample shaft and supporting structureto accommodate greater torque and side pull of thedrive caused by the larger motors. These forces areparticularly severe when motors are started across the line.

BEARING COOLING WHEELSA cooling wheel should ordinarily be used with

each external bearing on units operating over 300˚ F.,to dissipate conducted and radiated heat away fromthe bearings. DF Fan cooling wheels are split type,cast aluminum for easy assembly and maintenance.

MISCELLANEOUS NOTESWhere direct fired heaters are used, provision for

adequate mixing of the high temperature output mustbe made in order to avoid fan, shaft and bearingdamage.

High temperature limit controls in direct firedinstallations should be located in the fan inlet airstream. High temperature units should be run untilthe internal temperature drops to 200˚ F. on shut-offto prevent shaft sag or runout.

FAN CAPACITY MULTIPLIERSFor Various Clearance Factors

Clearance Factor RPM BHP

1.0 1.0 1.0.9 1.02 1.03.8 1.03 1.05

.7 1.05 1.07

.6 1.06 1.08

.5 1.07 1.09

.4 1.08 1.11

MAXIMUM SPEEDS & TEMPERATURE CONDITIONSFor Steel Wheels and Steel Shafts

Type DF — Max. Fan Wheel Tip Speed — ft./min.

Temp. Size 1/2 – 1 3/4 Sizes 2 – 2 1/2Range ˚F. Without Rings Without Rings With Rings

Up to 300 8100 7000 8100

301 - 600 7500 6500 7500

601 - 750 6000 5500 6000

Bore A B

1” to 1-11/16 13/16” 6-1/2”1-3/4” to 2-15/16” 13/16” 8-1/4”

3” to 3-15/16” 1 3/8” 12”

COOLING CONE COOLING WHEEL

6

INSTALLATION ARRANGEMENTS

SINGLE UNITARY FANSBall Bearing

Max MaxSize RPM Motor HP

1/2 2900 15/8 2400 1.53/4 2000 27/8 1550 31 1450 51 1/8 1200 51 1/4 1150 51 3/8 1100 51 1/2 900 51 3/4 800 7.52 700 102 1/4 600 152 1/2 500 20

DUPLEX FANSBall Bearing

Max MaxSize RPM Motor HP

1/2 2900 1.55/8 2400 23/4 1750 37/8 1450 31 1450 51 1/8 1150 51 1/4 1100 51 3/8 1100 7.51 1/2 850 101 3/4 800 102 700 152 1/4 600 202 1/2 550 25

LIMITATIONS OF DF STANDARD COMPLETE FANS (TYPES DF, DFB, AND DFC)

PERFORMANCE TABLES - DF, DFB & DFC

7

The following performance tables are based onseparate tests run on single unitary and duplexarrangements (except sizes 1/2 and 5/8). Tests are perAMCA Bulletin 210 and duplex tests are based on fansnot closer than indicated on page 5 of this catalog.

All ratings are for free standing fans. When used inenclosures, table values must be de-rated. De-ratingvalues should be obtained from tests per AMCABulletin 211A, or can be estimated from chart onpage 5 of this catalog.

CUT-OFF ADJUSTMENT - TYPES DFB & DFC DUPLEX FANSSome sizes of DFB & DFC Duplex fans exhibit

unstable tendencies when operated at low volume -pressure ratios. This may result in unequal air deliver-ies where each fan is connected to a separate ductsystem.

This condition may be corrected by moving theheel of the cut-off in towards the wheel “A” inches.

SIZE 1/2 — DF TYPE DFB UNITARY FAN — SINGLE FAN*OUTLET AREA = .36 SQ. FT. WHEEL BLADE DIA. = 6 1/2” TIP SPEED = RPM x 1.70 STD. BALANCE RPM: 3600

Volume Outletof Air Velocity 1/4” SP 1/2” SP 3/4” SP 1” SP 1 1/4” SP 1 1/2” SP 1 3/4” SP 2” SP 2 1/2” SP 3” SPCFM FMP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

288 800 843 .02 1182 .04 1488 .06 1730 .09324 900 867 .02 1172 .05 1470 .01 1725 .10 1935 .12360 1000 897 .03 1176 .05 1447 .08 1109 .11 1926 .13 2115 .16 2288 .20396 1100 932 .03 1188 .06 1438 .08 1685 .11 1910 .14 2106 .18 2288 .21 2448 .24432 1200 971 .04 1209 .06 1439 .09 1667 .12 1889 .16 2093 .19 2277 .22 2445 .26 2730 .34468 1300 1013 .05 1235 .07 1446 .10 1656 .13 1866 .17 2072 .20 2261 .24 2439 .28 2732 .36 2980 .44504 1400 1058 .06 1263 .08 1464 .11 1659 .14 1854 .18 2048 .22 2237 .25 2421 .29 2729 .38 2990 .46540 1500 1104 .07 1296 .09 1487 .12 1671 .16 1851 .19 2033 .23 2213 .27 2393 .31 2717 .40 2985 .49576 1600 1152 .08 1335 .10 1515 .13 1688 .17 1859 .21 2030 .24 2196 .28 2363 .33 2694 .42 2975 .51648 1800 1248 .10 1418 .13 1578 .16 1733 .20 1887 .24 2040 .28 2193 .32 2343 .37 2642 .46 2940 .56720 2000 1346 .13 1506 .16 1652 .20 1796 .24 1935 .27 2075 .32 2214 .36 2354 .41 2627 .51 2893 .62792 2200 1446 .16 1599 .20 1731 .24 1865 .28 1997 .32 2124 .36 2250 .41 2378 .46 2630 .56 2875 .68864 2400 1548 .20 1694 .24 1818 .29 1943 .33 2064 .38 2184 .42 2301 .46 2417 .51 2648 .62 2789 .74936 2600 1652 .25 1791 .30 1910 .34 2027 .39 2139 .44 2250 .48 2361 .53 2471 .58 2682 .69 2892 .801008 2800 1757 .31 1890 .36 2004 .40 2115 .45 2220 .50 2324 .55 2427 .61 2529 .66 2730 .77 2928 .881080 3000 1996 .42 2106 .46 2208 .52 2304 .58 2400 .64 2496 .68 2592 .72 2184 .85 2974 .061152 3200 2662 .80 2848 .94 3030 1.041224 3400 3093 1.16

(ALL CAPACITIES BASED ON STANDARD AIR (DENSITY .075# / CU. FT. – 70˚F. – 29.29” HG. BAR.)

SIZE 5/8 — DF TYPE DFB UNITARY FAN — SINGLE FAN*OUTLET AREA = .53 SQ. FT. WHEEL BLADE DIA. = 8 1/8” TIP SPEED = RPM x 2.13 STD. BALANCE RPM: 2850 MAX. RPM WITH REINFORCEMENT: 3600

Volume Outletof Air Velocity 1/4” SP 1/2” SP 3/4” SP 1” SP 1 1/4” SP 1 1/2” SP 1 3/4” SP 2” SP 2 1/2” SP 3” SPCFM FMP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP

424 800 672 .03 943 .06 1187 .09 1378 .13477 900 692 .04 935 .07 1173 .10 1377 .14 1545 .18530 1000 716 .04 938 .07 1151 .11 1364 .15 1537 .29 1687 .24 1825 .29583 1100 744 .05 948 .08 1148 .12 1343 .17 1526 .21 1881 .26 1825 .31 1953 .36636 1200 775 .06 965 .09 1148 .13 1330 .18 1508 .23 1670 .27 1817 .33 1951 .38 2179 .50689 1300 808 .07 986 .11 1194 .15 1322 .19 1489 .24 1654 .29 1804 .35 1947 .41 2180 .52 2380 .65742 1400 844 .08 1009 .12 1169 .16 1324 .21 1479 .26 1635 .31 1787 .37 1932 .43 2177 .55 2385 .68795 1500 881 .10 1034 .14 1186 .18 1334 .23 1478 .28 1623 .33 1766 .39 1910 .45 2168 .58 2382 .71848 1600 919 .11 1066 .15 1209 .20 1346 .25 1482 .30 1620 .36 1753 .42 1887 .48 2150 .61 2375 .75954 1800 995 .15 1132 .19 1260 .24 1383 .29 1506 .35 1628 .41 1750 .47 1870 .54 2105 .68 2347 .821060 2060 1073 .19 1202 .24 1318 .29 1433 .35 1542 .40 1652 .46 1764 .53 1878 .60 2006 .75 2303 .901166 2200 1154 .24 1276 .29 1382 .35 1489 .41 1593 .47 1694 .53 1795 .60 1897 .67 2099 .82 2295 .981272 2400 1236 .30 1353 .36 1450 .42 1550 .48 1647 .55 1743 .61 1836 .68 1929 .75 2112 .90 2296 1.071378 2600 1318 .37 1430 .43 1524 .50 1617 .57 1707 .64 1796 .71 1884 .78 1972 .85 2140 1.00 2309 1.171484 2800 1401 .45 1508 .52 1599 .59 1687 .66 1772 .73 1854 .81 1936 .89 2019 .96 2179 1.12 2338 1.281590 3000 1588 .62 1683 .69 1762 .77 1838 .85 1918 .93 1988 1.01 2072 1.08 2220 1.26 2372 1.421696 3200 2132 1.25 2274 1.42 2418 1.571802 3400 2476 1.74

(ALL CAPACITIES BASED ON STANDARD AIR (DENSITY .075# / CU. FT. – 70˚F. – 29.29” HG. BAR.)

* ON SIZES 1/2 AND 5/8, ESTIMATE DUPLEX PERFORMANCE BY MULTIPLYING CFM AND BHP BY 2.

8

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7” S

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RPM

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RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

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RPM

BHP

RPM

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RPM

BHP

RPM

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700

795

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0.09

948

0.15

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0.11

931

0.16

1096

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2412

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1140

810

0.15

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1072

0.27

1206

0.34

1338

0.42

1100

1250

842

0.18

959

0.23

1077

0.30

1198

0.37

1321

0.45

1200

1360

876

0.21

985

0.27

1092

0.33

1201

0.40

1313

0.48

1536

0.66

1300

1480

911

0.25

1016

0.31

1115

0.37

1214

0.44

1315

0.52

1521

0.70

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947

0.29

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0.35

1142

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0.49

1326

0.57

1516

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1708

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984

0.34

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0.41

1172

0.48

1258

0.55

1344

0.63

1518

0.80

1697

1.01

1876

1.23

1700

1930

1059

0.45

1155

0.52

1239

0.60

1318

0.68

1394

0.76

1546

0.94

1699

1.14

1857

1.37

2015

1.61

1900

2160

1229

0.67

1311

0.75

1385

0.84

1456

0.93

1593

1.11

1728

1.31

1865

1.53

2005

1.78

2146

2.04

2100

2390

1304

0.84

1384

0.93

1456

1.03

1524

1.12

1651

1.32

1774

1.53

1896

1.75

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1.99

2146

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2.83

2300

2610

1458

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1529

1.25

1595

1.35

1717

1.56

1831

1.78

1943

2.01

2055

2.25

2168

2.51

2397

3.07

2631

3.71

2500

2840

1604

1.50

1668

1.61

1786

1.84

1896

2.07

2000

2.31

2103

2.55

2206

2.81

2413

3.38

2625

4.01

2840

4.70

2700

3070

1679

1.79

1742

1.91

1858

2.16

1964

2.40

2064

2.65

2160

2.90

2256

3.17

2446

3.74

2639

4.37

2836

5.05

3035

5.80

2900

3300

1817

2.25

1931

2.51

2035

2.77

2131

3.04

2224

3.30

2314

3.58

2491

4.16

2669

4.78

2849

5.46

3032

6.20

3100

3520

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2.91

2107

3.19

2201

3.47

2291

3.75

2377

4.04

2545

4.63

2710

5.26

2877

5.94

3046

6.68

3300

3750

2080

3.35

2180

3.64

2273

3.94

2361

4.24

2444

4.54

2605

5.16

2761

5.81

2916

6.49

3073

7.22

3500

3980

2255

4.15

2346

4.47

2432

4.78

2514

5.10

2669

5.74

2818

6.41

2965

7.10

3112

7.84

3700

4200

2330

4.71

2420

5.04

2505

5.38

2585

5.71

2736

6.38

2880

7.07

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BHP

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1140

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0.32

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0.45

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0.62

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0.78

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831

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0.61

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1.27

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2.20

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0.71

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3413

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11.6

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3513

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3610

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7.97

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8.72

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9.46

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10.2

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6810

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12.5

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5414

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5318

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10.5

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14.6

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CAP

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BASE

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.) SIZE

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INFO

RCM

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6

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me

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city

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P2”

SP

2 1/

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P3”

SP

3 1/

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P4”

SP

5” S

P6”

SP

7” S

P8”

SP

CFM

FMP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

4000

819

458

0.56

567

0.87

4800

983

452

0.66

562

1.02

654

1.39

5600

1150

461

0.82

554

1.16

648

1.58

730

2.01

803

2.44

6400

1310

483

1.03

556

1.35

640

1.77

723

2.25

798

2.74

7200

1480

510

1.31

572

1.62

640

2.01

715

2.49

790

3.02

923

4.12

8000

1640

540

1.64

596

1.97

653

2.34

716

2.79

783

3.31

916

4.50

10

325.

73

8800

1800

571

2.03

624

2.39

675

2.77

727

3.19

784

3.69

907

4.88

1025

6.21

1130

7.56

9600

1970

654

2.88

701

3.28

747

3.70

796

4.17

903

5.31

1017

6.68

1124

8.13

1220

9.61

1309

11.0

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400

2130

685

3.45

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3.87

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4.30

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4.77

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37

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8526

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28.5

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0

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CAP

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BASE

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TY .0

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.)

13

SIZE

1 3

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DF

TYPE

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173

1

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1/2”

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1 1/

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P2”

SP

2 1/

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P3”

SP

3 1/

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P4”

SP

5” S

P6”

SP

7” S

P8”

SP

CFM

FMP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

2500

833

393

0.31

487

0.48

3000

1000

405

0.40

481

0.57

559

0.77

3500

1170

426

0.51

490

0.68

556

0.88

62

3

1.11

68

91.

36

4000

1330

452

0.66

509

0.84

565

1.04

622

1.26

681

1.51

797

2.08

4500

1500

479

0.84

533

1.03

583

1.24

633

1.46

683

1.71

787

2.28

890

2.92

5000

1670

508

1.05

559

1.26

606

1.48

650

1.71

695

1.96

786

2.52

880

3.16

97

33.

88

5500

1830

536

1.30

587

1.53

631

1.77

673

2.01

713

2.26

795

2.82

879

3.46

964

4.17

1049

4.95

6000

2000

615

1.84

658

2.10

698

2.36

736

2.62

810

3.19

886

3.82

962

4.53

1040

5.30

1118

6.14

6500

2170

643

2.20

686

2.47

724

2.75

760

3.03

830

3.62

899

4.26

969

4.96

1040

5.72

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6.55

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2330

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4.87

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5.23

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6.68

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7.44

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8.22

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9.05

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6.70

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500

3500

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10.2

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4000

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CAP

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BASE

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TY .0

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.) SIZE

1 3

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DF

TYPE

DFB

DUP

LEX

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A =

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1

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P3”

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3 1/

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P4”

SP

5” S

P6”

SP

7” S

P8”

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CFM

FMP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

5000

833

415

0.70

515

1.08

6000

1000

411

0.83

509

1.26

594

1.72

7000

1170

423

1.04

503

1.45

587

1.96

66

32.

50

729

3.04

8000

1330

445

1.33

509

1.71

581

2.21

655

2.79

724

3.40

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4.64

9000

1500

472

1.70

526

2.08

585

2.54

649

3.11

716

3.76

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5.13

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2000

606

3.75

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4.24

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4.75

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5.32

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6.66

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35.5

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1900

031

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18.4

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2820

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2000

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6

15.4

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20.7

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2435

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4548

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29.9

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5431

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33.9

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42.5

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4947

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000

4170

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34.8

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7945

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50.5

616

4956

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(ALL

CAP

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BASE

D ON

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D AI

R (D

ENSI

TY .0

75#

/ CU.

FT.

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0˚F.

– 29

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HG.

BAR

.)

14

SIZE

1 1

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DF

TYPE

DFB

UNI

TARY

FAN

— S

INGL

E FA

NOU

TLET

ARE

A =

3.53

SQ.

FT.

WHE

EL B

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. = 1

9 1/

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P SP

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= RP

M x

5.1

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D. B

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PM: 1

600

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. RPM

WIT

H RE

INFO

RCM

ENT:

165

0

Volu

me

Outle

tof

Air

Velo

city

1/2”

SP

3/4”

SP

1” S

P1

1/4”

SP

1 1/

2” S

P2”

SP

2 1/

2” S

P3”

SP

3 1/

2” S

P4”

SP

5” S

P6”

SP

7” S

P8”

SP

CFM

FMP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

3000

849

374

0.39

457

0.62

3600

1020

368

0.46

459

0.71

538

0.

98

604

1.25

4200

1190

37

4

0.56

45

20.

8053

01.

09

600

1.41

660

1.73

4800

1360

388

0.69

453

0.93

522

1.22

591

1.55

654

1.91

763

2.64

5400

1530

404

0.85

464

1.10

522

1.38

583

1.71

645

2.08

757

2.89

853

3.71

6000

1700

422

1.04

478

1.31

531

1.59

584

1.91

638

2.28

748

3.12

847

4.02

934

4.93

6600

1870

442

1.27

495

1.55

544

1.85

591

2.17

640

2.53

740

3.36

838

4.31

928

5.30

1007

6.30

7200

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BHP

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6000

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272

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1120

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12.3

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BHP

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RPM

BHP

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1300

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0.29

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0.24

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0.32

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1900

1170

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0.38

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0.48

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0.61

1147

0.76

2100

1300

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0.35

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0.44

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0.55

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0.67

1129

0.81

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0.52

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0.63

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0.74

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0.61

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1.65

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0.83

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0.95

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1.37

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1.73

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2.15

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0.69

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0.82

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1.49

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1.84

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2.25

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1.35

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1.64

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1.97

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2.37

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1.37

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1.51

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1.81

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2.51

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2.95

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3.43

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1.38

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6.39

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7.35

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8.37

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BHP

RPM

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2.31

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2.60

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3.28

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3.61

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4.33

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6.96

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3.33

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3.67

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4.02

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6.54

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RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

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RPM

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1500

810

564

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0.32

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972

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0.31

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0.43

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0.57

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0.52

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0.66

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0.81

981

0.98

2700

1460

651

0.50

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0.63

815

0.77

896

0.92

977

1.10

1135

1.48

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1620

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0.62

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0.76

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1.06

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1.24

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1.63

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0.77

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0.91

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1.23

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1.40

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2.24

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2.72

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1.10

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1.26

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1.43

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2.93

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1.48

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1.65

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1.84

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2.24

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2.68

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3.17

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3.70

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3.45

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3.77

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4.88

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6.13

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7.31

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8.53

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RPM

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3000

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581

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1.35

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1.65

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2.33

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3.07

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1.64

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2.28

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2.65

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3.44

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4.27

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2.30

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2.65

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3.02

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3.84

1298

4.72

1418

5.63

7200

1950

813

2.13

870

2.42

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3.08

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3.45

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20.5

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5721

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1980

24.6

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5017

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SIZE

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TYPE

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E FA

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A =

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FMP

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BHP

RPM

BHP

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BHP

RPM

BHP

RPM

BHP

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2100

801

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3.15

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3.45

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4.04

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4.66

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6.15

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3.37

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3.67

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4.64

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5.29

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6.72

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7.57

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4.60

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5.30

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5.99

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1985

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6.82

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7.61

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8.39

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RPM

BHP

RPM

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RPM

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2300

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440

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RPM

BHP

RPM

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TY .0

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.)

SIZE

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P4”

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RPM

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RPM

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3 1/

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CFM

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BHP

RPM

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BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

7000

841

376

0.99

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1.45

8000

961

382

1.17

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1.67

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2.21

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390

1.39

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1.98

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2.54

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3.93

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4.58

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5.35

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6.18

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11.6

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1800

500

3.98

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4.56

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5.20

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5.96

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6.80

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8.62

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1900

022

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11.7

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8427

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000

3000

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17.8

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318

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20.7

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25.1

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4527

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30.5

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9

22.6

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324

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26.8

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2034

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1222

40.5

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1947

.07

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53.7

215

0160

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2900

034

9097

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1017

31.5

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5833

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36.3

211

4639

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1240

45.1

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3351

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9839

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BHP

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BHP

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BHP

RPM

BHP

RPM

BHP

RPM

BHP

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BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

4500

790

314

0.58

393

0.91

5500

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316

0.72

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1.06

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1.46

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0.93

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1.67

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1.21

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1.56

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1.95

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2.40

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1.55

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1.92

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2.33

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2.78

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3.28

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1.97

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2.79

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3.25

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11.6

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519

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23.1

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8627

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6036

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3078

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5542

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BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

BHP

RPM

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9000

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4.27

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5.19

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6.20

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7.25

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9.43

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4.56

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5.31

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.)

25

SIZE

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TYPE

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BHP

RPM

BHP

RPM

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6000

811

267

0.73

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1.16

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1.28

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1.79

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278

1.08

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1.47

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1.95

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9000

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28

INSTALLATION SUGGESTIONS

FOUNDATIONS:Unit foundations and bearing supports must be designed

for live load with horizontal as well as vertical stiffness.Bearing supports must be flat and level for proper bearingoperation and rated life.

DF - DFB - DFC FAN ASSEMBLY:1. Install fan housings. Housings are frequently supported

from outlets and/or sides with additional support at rear ofhousings on larger sizes.

2. Insert wheels in housings. Wheels are inserted throughoutlets after removal of cut-off plates. These centrifugal for-ward curved wheels must be inserted so that cup of bladefaces the outlet.

3. Insert shaft in position. Slide the shaft through the shafthole in unit casing and through the wheel hubs. Slide keysinto wheel hubs before this operation is completed. Looselymount cooling wheels, if used, on shaft between the casingand the bearings so that the cooling wheel blades face awayfrom casing toward end of shaft.

4. Mount bearings (see bearing installation). Slide the driveside bearing (“Held”, “Fixed” or “Retained” bearing) onto shaftand loosely bolt in position. Also slide the opposite side bear-ing (“Free” or “Floating” bearing) onto shaft and loosely boltinto position. Position the shaft in bearings so that 1/4” of shaftextends out of the opposite side bearing. Align the bearinghousings with the shaft so that the shaft is centered in seals ofbearings and the seals of bearings rotate freely. Tighten thebearing housing hold-down bolts. Lock inner race of drive sidebearing to shaft.

5. Complete fan wheel installation. Position wheels incenter of their housings for low or normal temperature units.For high temperature units, position wheels toward drive sideof housing, allowing only running clearance. Always tightenthe wheel hub set screw over the keyway first and then theother set screw second. Replace cutoff plates previouslyremoved.

6. Complete bearing installation. Position balls and racesof opposite side (floating) bearing in the center of float spacefor normal temperature units. For high temperature units posi-tion balls and races toward unit side of float space leavingvery small end clearance in order to allow nearly full float forshaft expansion. Lock inner race of floating bearing to shaft.Fill grease lubricated bearing housings 1/3 full of lubricantshown below and replace end bell or top half of bearing.Check alignment of both bearings with shaft, repositioningbearing as required. If cooling wheels are used, position cool-ing wheels as shown in illustration on page 5, bolt wheelhalves securely together and complete cooling assemblies.Rotate shaft to make sure fans run free and clear. Install andalign the drive.

7. Initial operation. Apply power momentarily. Check forproper direction of fan rotation. Check drive for smooth opera-tion. After 50 hours of operation, re-tighten wheel hub setscrews and bearing hold down bolts.

BEARING INSTALLATION:The following are general bearing installation suggestions.

Always consult the bearing manufacturer for specific bearinginstallation instructions.

Standard Cast Iron Pillowblock Bearings. To install the uniton the shaft, make certain that shafting is free of burrs.Setscrews should be clear of bore. Slide the bearing into posi-tion on the shaft. Never hammer the end of the inner racesince they are relatively soft. If necessary to apply force, use abrass or copper pipe or bar against the inner race to drift thebearing into place. Bolt bearing housing to support. Rotateshaft to make certain it turns freely. Then tighten the setscrewssecurely onto the shaft. Consult the bearing manufacturer forsetscrew torque tightening values.

Taper Roller Bearings. Expansion and Non-ExpansionBearings. One non-expansion bearing must be installed onevery shaft to stabilize the shaft. Slide the bearing unit andlocking collar on the shaft. DO NOT hammer the ends of thebearing. If the fit is snug, use a piece of emery cloth to smoothrough spots on shaft. Mount the housing securely to the bear-ing supports. Secure the first bearing to the shaft by first tight-ening all setscrews to one half of the tightening torque recom-mended by the manufacturer. Then, alternately tighten thesetscrews to the torque value recommended by the manufac-turer. Check for freedom of rotation. Repeat procedure forremaining bearings on shaft.

Caution: Dirt is a major cause of premature bearing fail-ure. Extreme care should be taken during installation andlubrication to prevent entrance of dirt.

LUBRICATION:Use a clean lithium base grease conforming to a NLGI

grade #2 consistency. Add lubricant semi-annually for dirtyatmospheres or high temperature installations and annually forclean normal conditions. This type of lubricant is satisfactoryfor an operating temperature range of -30˚ F to +250˚ F.

DRIVES:Improperly installed V-belt drives cause vibration and

excessive drive wear. Installation practices should be observedas follows:1. Fan and motor shafts must be parallel.2. Fan and motor sheaves must be aligned axially.3. Belts must have proper tension, neither too tight or too

loose.4. Fan sheaves for belt speeds over 5000 ft./ min. should be

specially balanced.5. When installing bushed sheaves, locking bolts must be

tightened uniformly to avoid sheave eccentricity.6. Always tighten setscrew over keyway first.

AFTER RUN:On high temperature installations (over 300˚ F.) fans

should be operated after heater shut-off until cool to preventshaft bending because of creep during high temperature soak-ing.

DIRECT FIRED HEATERS:Provision must be made for adequate mixing of heater out-

put with the circulated air to furnish uniform fan inlet temper-ature. Stratification and local spots cause uneven fan wheelexpansion and subsequent distortion.

High temperature limit controls should be located in faninlet air stream.

DF - DFB - DFC FAN DIMENSIONS

29

DFB HOUSINGSFAN WEIGHTSIZE A B D E* F* H J K Lbs.

¹⁄₂ 11⁹⁄₁₆ 11¹⁄₄ 4⁷⁄₁₆ 7¹⁄₂ 7¹⁄₈ 4⁷⁄₈ 1¹⁄₄ ⁷⁄₁₆ 6.25⁵⁄₈ 14¹⁄₁₆ 13¹⁄₂ 5⁷⁄₁₆ 9 8⁵⁄₈ 6 1¹⁄₄ ⁹⁄₁₆ 9.25³⁄₄ 16⁷⁄₈ 15⁵⁄₈ 5⁷⁄₈ 10⁵⁄₈ 12³⁄₈ 7³⁄₁₆ 1⁹⁄₁₆ 2¹¹⁄₁₆ 13.5

⁷⁄₈ 19⁵⁄₈ 18 6³⁄₄ 13³⁄₄ 14⁷⁄₁₆ 8³⁄₈ 1¹¹⁄₁₆ 3³⁄₁₆ 181 22¹⁄₂ 20¹⁄₂ 7¹³⁄₁₆ 13³⁄₄ 16⁷⁄₁₆ 9⁵⁄₈ 1¹¹⁄₁₆ 3⁹⁄₁₆ 211¹⁄₈ 25⁵⁄₁₆ 22¹³⁄₁₆ 8¹¹⁄₁₆ 17¹⁄₂ 18⁵⁄₈ 10¹³⁄₁₆ 1¹³⁄₁₆ 4¹⁄₈ 30

1¹⁄₄ 28 25¹⁄₄ 9¹¹⁄₁₆ 17¹⁄₂ 20¹⁄₂ 12 1¹³⁄₁₆ 4¹⁄₂ 32.751³⁄₈ 30⁵⁄₁₆ 26¹¹⁄₁₆ 9⁷⁄₈ 19¹⁄₂ 22⁵⁄₈ 12³⁄₄ 1⁷⁄₈ 5¹⁄₁₆ 371¹⁄₂ 33 28¹⁵⁄₁₆ 10¹³⁄₁₆ 21 24⁵⁄₈ 13⁷⁄₈ 1⁷⁄₈ 5¹⁄₂ 46

1³⁄₄ 38³⁄₈ 33¹⁄₂ 12⁷⁄₁₆ 24¹⁄₄ 28³⁄₄ 16¹⁄₁₆ 2³⁄₁₆ 6⁷⁄₁₆ 632 45¹⁵⁄₁₆ 40⁷⁄₈ 16¹⁄₄ 27⁵⁄₈ 32³⁄₄ 19¹³⁄₁₆ 2 7⁵⁄₁₆ 105

* OUTLET DIMENSIONS — OUTSIDE

STANDARD HUBS— TYPE DF WHEELS

DF WHEEL HUB BORE RANGE WEIGHTSIZE SIZE MIN MAX R S T Lbs.

¹⁄₂, ⁵⁄₈” M-1283 ¹⁄₄ ⁵⁄₈ 1⁷⁄₈ 1¹⁄₄ — 1M-1375 ¹¹⁄₁₆ 1 1⁷⁄₈ 1¹⁄₄ — 1M-975 1¹¹⁄₁₆ 1⁷⁄₁₆ 2³⁄₈ 1¹⁄₄ — 2.25M-1014 1¹⁄₂ 2 3³⁄₄ 2 — 4.5

³⁄₄, ⁷⁄₈, 1”, M-799 ⁵⁄₈ 1³⁄₁₆ 2¹⁄₄ 2 — 39” M-1014 1¹⁄₄ 2⁷⁄₁₆ 3³⁄₄ 2 — 4.5

1¹⁄₈, 1¹⁄₄”, M-739 ³⁄₄ 1⁵⁄₈ 2³⁄₄ 3¹⁄₈ — 6.751³⁄₈ M-1802 1¹¹⁄₁₆ 2¹¹⁄₁₆ 4¹⁄₈ 3¹⁄₈ — 11.5

M-1421 2³⁄₄ 3⁷⁄₁₆ 5¹⁄₈ 3 — 13.5M-1812-S 3¹⁄₂ 5¹⁄₈ 5³⁄₄ 3 — 16

1¹⁄₂, 1³⁄₄” UH-11-1 1 1⁹⁄₁₆ 2³⁄₄ 3³⁄₁₆ — 10.52 UH-11-3 1⁵⁄₈ 2⁹⁄₁₆ 4 3³⁄₁₆ — 12.25

UH-11-4 2⁵⁄₈ 3¹³⁄₁₆ 5¹⁄₄ 3³⁄₁₆ — 16.25M-1812 3⁷⁄₈ 5¹⁄₈ 7 2¹⁄₂ — 30

2¹⁄₄, 2¹⁄₂” M-1816 1¹¹⁄₁₆ 2¹¹⁄₁₆ 4¹⁄₂ 3³⁄₄ ¹³⁄₁₆ 35M-1817 2³⁄₄ 3¹¹⁄₁₆ 5³⁄₄ 3³⁄₄ ¹³⁄₁₆ 46M-1929 3³⁄₄ 6 7³⁄₄ 3¹⁄₂ ³⁄₈ 57

DF WHEELSWHEELWEIGHTS

FAN LESS HUBSIZE L M N O P Lbs.

¹⁄₂ 6¹⁵⁄₆₄ 6³⁄₄ 5⁵⁄₈ 6¹⁄₂ 3 3⁵⁄₈ 7⁴⁷⁄₆₄ 8¹⁄₄ 7¹⁄₁₆ 8¹⁄₈ 3³⁄₄ 5.59” 9¹⁵⁄₁₆ 9¹⁄₄ 7³⁄₄ 9 4¹⁄₂ 8

³⁄₄ 9¹⁵⁄₁₆ 10 8¹⁄₂ 9³⁄₄ 4¹⁄₂ 8.5⁷⁄₈ 12¹⁵⁄₆₄ 11⁵⁄₈ 9⁵⁄₈ 11³⁄₈ 6 141 12¹⁵⁄₆₄ 13¹⁄₄ 11¹⁄₄ 13 6 15

1¹⁄₈ 15¹⁵⁄₆₄ 15 12¹⁄₂ 14⁵⁄₈ 7¹⁄₂ 211¹⁄₄ 15¹⁵⁄₆₄ 16⁵⁄₈ 14¹⁄₄ 16¹⁄₄ 7¹⁄₂ 221³⁄₈ 16²⁵⁄₃₂ 18¹⁄₈ 15¹⁄₂ 17⁷⁄₈ 8¹⁄₄ 28.5

1¹⁄₂ 18⁹⁄₃₂ 19⁷⁄₈ 17¹⁄₈ 19¹⁄₂ 9 381³⁄₄ 21⁹⁄₃₂ 23³⁄₈ 20 22³⁄₄ 10¹⁄₂ 512 24⁷⁄₁₆ 26¹⁄₂ 22⁷⁄₈ 26 12 83

2¹⁄₄ 27¹³⁄₃₂ 30 25³⁄₄ 29¹⁄₄ 13¹⁄₂ 1152¹⁄₂ 30¹¹⁄₃₂ 33¹⁄₄ 28⁵⁄₈ 32¹⁄₄ 15 170.5

DFC HOUSINGSFAN WEIGHTSIZE A B D E* F* H J K Lbs.

³⁄₄ 16⁷⁄₈ 15⁵⁄₈ 5⁷⁄₈ 12¹⁄₂ 12³⁄₈ 7³⁄₁₆ 1⁹⁄₁₆ 2¹¹⁄₁₆ 14⁷⁄₈ 19⁵⁄₈ 18 6³⁄₄ 16⁹⁄₁₆ 14⁷⁄₁₆ 8³⁄₈ 1¹¹⁄₁₆ 3³⁄₁₆ 201 22¹⁄₂ 20¹⁄₂ 7¹³⁄₁₆ 16⁹⁄₁₆ 16⁷⁄₁₆ 9⁵⁄₈ 1¹¹⁄₁₆ 3⁹⁄₁₆ 23

1¹⁄₈ 25⁵⁄₁₆ 22¹³⁄₁₆ 8¹¹⁄₁₆ 20⁵⁄₈ 18⁵⁄₈ 10¹³⁄₁₆ 1¹³⁄₁₆ 4¹⁄₈ 321¹⁄₄ 28 25¹⁄₄ 9¹¹⁄₁₆ 20⁵⁄₈ 20¹⁄₂ 12 1¹³⁄₁₆ 4¹⁄₂ 341³⁄₈ 30⁵⁄₁₆ 26¹¹⁄₁₆ 9⁷⁄₈ 22³⁄₄ 22⁵⁄₈ 12³⁄₄ 1⁷⁄₈ 5¹⁄₁₆ 42

1¹⁄₂ 33 28¹⁵⁄₁₆ 10¹³⁄₁₆ 24³⁄₄ 24⁵⁄₈ 13⁷⁄₈ 1⁷⁄₈ 5¹⁄₂ 521³⁄₄ 38³⁄₈ 33¹⁄₂ 12⁷⁄₁₆ 28⁷⁄₈ 28³⁄₄ 16¹⁄₁₆ 2³⁄₁₆ 6⁷⁄₁₆ 762 45¹⁵⁄₁₆ 40⁷⁄₈ 16¹⁄₄ 32³⁄₄ 32⁷⁄₈ 19¹³⁄₁₆ 2 7⁵⁄₁₆ 131

2¹⁄₄ 51⁵⁄₈ 45³⁄₄ 18³⁄₈ 36¹³⁄₁₆ 36¹⁵⁄₁₆ 22⁵⁄₁₆ 2 8³⁄₁₆ 1652¹⁄₂ 57³⁄₁₆ 50⁷⁄₁₆ 20³⁄₈ 40⁷⁄₈ 41 24¹¹⁄₁₆ 2 9¹⁄₁₆ 226

* OUTLET DIMENSIONS — OUTSIDE

30

UNITARY FAN DIMENSIONS

TYPE DFB UNITARY FANKEYWAY IN

SHAFTFAN BHD UBD THD DRIVE HUB

EXT. WEIGHTSIZE A† B† A† B† A† B† C† D E* F* G H J K L M N O R S WIDTH DEPTH DIA. LBS

¹⁄₂ 12³⁄₈ 11¹⁄₄ 13³⁄₁₆ 11⁹⁄₁₆ 14³⁄₁₆ 11¹⁄₄ 14¹⁄₄ 4⁷⁄₁₆ 7¹⁄₂ 7¹⁄₈ 7¹⁄₂ 4⁷⁄₈ 1¹⁄₄ ⁷⁄₁₆ 9 4³⁄₄ 5¹⁄₄ 4⁵⁄₈ 5⁹⁄₁₆ 4¹⁄₄ 1 24 ⁵⁄₈ 15 13¹⁄₂ 15¹¹⁄₁₆ 14¹⁄₁₆ 17¹⁄₁₆ 13¹⁄₂ 15³⁄₄ 5⁷⁄₁₆ 9 8⁵⁄₈ 9 6 1¹⁄₄ ⁹⁄₁₆ 9³⁄₄ 5¹⁄₂ 5¹⁄₄ 4³⁄₄ 6¹³⁄₁₆ 5 1 27³⁄₄ 18⁷⁄₁₆ 15⁵⁄₈ 18¹¹⁄₁₆ 16⁷⁄₈ 20¹⁵⁄₁₆ 15⁵⁄₈ 19³⁄₈ 5⁷⁄₈ 10⁵⁄₈ 12³⁄₈ 11¹⁄₄ 7³⁄₁₆ 1⁹⁄₁₆ 2¹¹⁄₁₆ 11 8³⁄₈ 5¹⁄₂ 4⁷⁄₈ 8³⁄₁₆ 7³⁄₄ ¹⁄₄ ¹⁄₈ 1 51

⁷⁄₈ 22⁷⁄₈ 18 22¹⁵⁄₁₆ 19⁵⁄₈ 25³⁄₄ 18 23 6³⁄₄ 13³⁄₄ 14⁷⁄₁₆ 14¹⁄₂ 8³⁄₈ 1¹¹⁄₁₆ 3³⁄₁₆ 12³⁄₄ 10¹⁄₄ 6¹⁄₄ 4³⁄₄ 9⁹⁄₁₆ 9⁵⁄₈ ¹⁄₄ ¹⁄₈ 1 70 1 24¹⁄₈ 20¹⁄₂ 24 22¹⁄₂ 27³⁄₈ 20¹⁄₂ 23 7¹³⁄₁₆ 13³⁄₄ 16⁷⁄₁₆ 14¹⁄₂ 9⁵⁄₈ 1¹¹⁄₁₆ 3⁹⁄₁₆ 12³⁄₄ 10¹⁄₄ 7¹⁄₄ 5³⁄₄ 11 9⁵⁄₈ ¹⁄₄ ¹⁄₈ 1 75 1¹⁄₈ 28⁵⁄₁₆ 22¹³⁄₁₆ 28 25⁵⁄₁₆ 32 22¹³⁄₁₆ 26³⁄₄ 8¹¹⁄₁₆ 17¹⁄₂ 18⁵⁄₈ 17¹⁄₂ 10¹³⁄₁₆ 1¹³⁄₁₆ 4¹⁄₈ 14⁵⁄₈ 12¹⁄₈ 8¹⁄₄ 6³⁄₄ 12⁵⁄₁₆ 11¹⁄₂ ¹⁄₄ ¹⁄₈ 1 95

1¹⁄₄ 29¹⁄₂ 25¹⁄₄ 29 28 33¹⁄₂ 25¹⁄₄ 26³⁄₄ 9¹¹⁄₁₆ 17¹⁄₂ 20¹⁄₂ 17¹⁄₂ 12 1¹³⁄₁₆ 4¹⁄₂ 14⁵⁄₈ 12¹⁄₈ 9¹⁄₂ 8 13³⁄₄ 11¹⁄₂ ¹⁄₄ ¹⁄₈ 1 102 1³⁄₈ 32¹⁄₄ 26¹¹⁄₁₆ 31¹⁄₄ 30⁵⁄₁₆ 37¹⁄₁₆ 26¹¹⁄₁₆ 29 9⁷⁄₈ 19¹⁄₂ 22⁵⁄₈ 19¹⁄₂ 12³⁄₄ 1⁷⁄₈ 5¹⁄₁₆ 15³⁄₄ 13¹⁄₄ 10¹⁄₄ 8³⁄₄ 14¹⁵⁄₁₆ 12⁵⁄₈ ¹⁄₄ ¹⁄₈ 1 1151¹⁄₂ 34⁷⁄₈ 28¹⁵⁄₁₆ 33¹¹⁄₁₆ 33 40¹⁄₈ 28¹⁵⁄₁₆ 29¹³⁄₁₆ 10¹³⁄₁₆ 21 24⁵⁄₈ 21 13⁷⁄₈ 1⁷⁄₈ 5¹⁄₂ 16¹⁄₄ 13⁹⁄₁₆ 11 9¹⁄₂ 16¹⁄₄ 12¹⁵⁄₁₆ ¹⁄₄ ¹⁄₈ 1 148

1³⁄₄ 40¹⁄₁₆ 33¹⁄₂ 38⁵⁄₈ 38³⁄₈ 46⁵⁄₁₆ 33¹⁄₂ 33⁵⁄₈ 12⁷⁄₁₆ 24¹⁄₄ 28³⁄₄ 24 16¹⁄₁₆ 2³⁄₁₆ 6⁷⁄₁₆ 18³⁄₄ 15¹⁄₄ 11¹⁄₈ 9⁵⁄₈ 18⁷⁄₈ 14⁵⁄₈ ¹⁄₄ ¹⁄₈ 1³⁄₁₆ 190 2 48⁵⁄₁₆ 40⁷⁄₈ 46³⁄₄ 45¹⁄₄ 53¹⁵⁄₁₆ 40⁷⁄₈ 38¹⁄₂ 16¹⁄₄ 27⁵⁄₈ 32³⁄₄ 28¹⁄₂ 19¹³⁄₁₆ 2 7⁵⁄₁₆ 20¹⁄₂ 18 12³⁄₄ 10³⁄₄ 22⁵⁄₈ 17¹⁄₈ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 315

OVERALL DIMENSIONS — †OUTLET DIMENSIONS—OUTSIDE — *

Unitary Fans are available in either clockwise (shown) or counter-clockwise rotation.Bottom Horizontal discharge shown. Other discharges available.

TYPE DF

SIZES ¹/₂ & ⁵/₈

TYPE DFB — SIZES ³/₄ THRU 2

TYPE DFC — SIZES 1³/₄ THRU 2¹/₂

TYPE DFC UNITARY FANKEYWAY IN

SHAFTFAN BHD UBD THD DRIVE HUB

EXT. WEIGHTSIZE A† B† A† B† A† B† C† D E* F* G H J K L M N O R S WIDTH DEPTH DIA. LBS

³⁄₄ 18⁷⁄₁₆ 15⁵⁄₈ 18¹¹⁄₁₆ 16⁷⁄₈ 20¹⁵⁄₁₆ 15⁵⁄₈ 21¹⁵⁄₁₆ 5¹³⁄₁₆ 12¹⁄₂ 12³⁄₈ 11¹⁄₄ 7³⁄₁₆ 1⁵⁄₈ 2¹¹⁄₁₆ 11⁷⁄₈ 10¹¹⁄₁₆ 5¹⁄₂ 4⁷⁄₈ 8³⁄₁₆ 9⁷⁄₁₆ ¹⁄₄ ¹⁄₈ 1 53⁷⁄₈ 22⁷⁄₈ 18 22¹⁵⁄₁₆ 19⁵⁄₈ 25³⁄₄ 18 25³⁄₁₆ 6²³⁄₃₂ 16⁹⁄₁₆ 14⁷⁄₁₆ 14¹⁄₂ 8³⁄₈ 1²³⁄₃₂ 3³⁄₁₆ 14¹⁄₈ 11¹¹⁄₁₆ 6¹⁄₄ 4³⁄₄ 9⁹⁄₁₆ 11¹⁄₁₆ ¹⁄₄ ¹⁄₈ 1 741 24¹⁄₈ 20¹⁄₂ 24 22¹⁄₂ 27³⁄₈ 20¹⁄₂ 25³⁄₁₆ 7²⁵⁄₃₂ 16⁹⁄₁₆ 16⁷⁄₁₆ 14¹⁄₂ 9⁵⁄₈ 1²³⁄₃₂ 3⁹⁄₁₆ 14¹⁄₈ 11¹¹⁄₁₆ 7¹⁄₄ 5³⁄₄ 11 11¹⁄₁₆ ¹⁄₄ ¹⁄₈ 1 81

1¹⁄₈ 27¹¹⁄₁₆ 22¹³⁄₁₆ 28 24¹¹⁄₁₆ 32 22¹³⁄₁₆ 29¹⁵⁄₁₆ 8⁵⁄₈ 20⁵⁄₈ 18⁵⁄₈ 17¹⁄₂ 10³⁄₁₆ 1⁷⁄₈ 4¹⁄₈ 16¹⁄₄ 13¹¹⁄₁₆ 8¹⁄₄ 6³⁄₄ 12⁵⁄₁₆ 13¹⁄₁₆ ¹⁄₄ ¹⁄₈ 1 1031¹⁄₄ 29¹⁄₂ 25¹⁄₄ 29 28 33¹⁄₂ 25¹⁄₄ 29¹⁵⁄₁₆ 9⁹⁄₁₆ 20⁵⁄₈ 20¹⁄₂ 17¹⁄₂ 12 1¹⁵⁄₁₆ 4¹⁄₂ 16¹⁄₄ 13¹¹⁄₁₆ 9¹⁄₂ 8 13³⁄₄ 13¹⁄₁₆ ¹⁄₄ ¹⁄₈ 1 1121³⁄₈ 32¹⁄₄ 26¹¹⁄₁₆ 31¹⁄₄ 30⁵⁄₁₆ 37¹⁄₁₆ 26¹¹⁄₁₆ 32¹⁄₄ 9¹³⁄₁₆ 22³⁄₄ 22⁵⁄₈ 19¹⁄₂ 12³⁄₄ 1¹⁵⁄₁₆ 5¹⁄₁₆ 17³⁄₄ 14¹⁄₂ 9⁷⁄₈ 8³⁄₈ 14¹⁵⁄₁₆ 13⁷⁄₈ ¹⁄₄ ¹⁄₈ 1³⁄₁₆ 127

1¹⁄₂ 34⁷⁄₈ 28¹⁵⁄₁₆ 33¹¹⁄₁₆ 33 40¹⁄₈ 28¹⁵⁄₁₆ 34³⁄₁₆ 10³⁄₄ 24³⁄₄ 24⁵⁄₈ 21 13⁷⁄₈ 1¹⁵⁄₁₆ 5¹⁄₂ 18³⁄₄ 15⁷⁄₁₆ 11 9¹⁄₂ 16¹⁄₄ 14¹³⁄₁₆ ¹⁄₄ ¹⁄₈ 1³⁄₁₆ 1621³⁄₄ 40¹⁄₁₆ 33¹⁄₂ 38⁵⁄₈ 38³⁄₈ 46⁵⁄₁₆ 33¹⁄₂ 40¹⁄₁₆ 12³⁄₈ 28⁷⁄₈ 28³⁄₄ 24 16¹⁄₁₆ 2¹⁄₄ 6⁷⁄₁₆ 21¹⁄₂ 18⁹⁄₁₆ 11¹³⁄₁₆ 9³⁄₄ 18⁷⁄₈ 17¹¹⁄₁₆ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 2122 48⁵⁄₁₆ 40⁷⁄₈ 46³⁄₄ 45¹⁄₄ 53¹⁵⁄₁₆ 40⁷⁄₈ 44¹³⁄₁₆ 16¹⁄₄ 32⁷⁄₈ 32³⁄₄ 28¹⁄₂ 19¹³⁄₁₆ 2 7⁵⁄₁₆ 24¹⁄₄ 20⁹⁄₁₆ 12³⁄₄ 10³⁄₄ 22⁵⁄₈ 19¹¹⁄₁₆ ³⁄₈ ³⁄₁₆ 1¹¹⁄₁₆ 353

2¹⁄₄ 54¹³⁄₁₆ 45³⁄₄ 52⁷⁄₈ 50¹⁵⁄₁₆ 61¹⁄₈ 45³⁄₄ 48¹⁄₈ 18³⁄₈ 36¹⁵⁄₁₆ 36¹³⁄₁₆ 32¹⁄₂ 22⁵⁄₁₆ 2 8³⁄₁₆ 27 21¹⁄₈ 12 7¹⁄₂ 25³⁄₈ 20 ¹⁄₂ ¹⁄₄ 2³⁄₁₆ 5702¹⁄₂ 60³⁄₁₆ 50⁷⁄₁₆ 57⁷⁄₈ 56¹⁄₂ 67⁵⁄₁₆ 50⁷⁄₁₆ 52¹⁄₈ 20³⁄₈ 41 40⁷⁄₈ 35¹⁄₂ 24¹¹⁄₁₆ 2 9¹⁄₁₆ 29 23¹⁄₈ 12 7¹⁄₂ 28¹⁄₁₆ 22 ¹⁄₂ ¹⁄₄ 2³⁄₁₆ 690

OVERALL DIMENSIONS — †OUTLET DIMENSIONS—OUTSIDE — *

TYPE DFC DUPLEX FAN KEYWAY IN

SHAFTFAN BHD UBD THD DRIVE HUB

EXT. WEIGHTSIZE A† B† A† B† A† B† C† D E* F* G H J K L M N O P R S WIDTH DEPTH DIA. LBS

³⁄₄ 18⁷⁄₁₆ 15⁵⁄₈ 18¹¹⁄₁₆ 16⁷⁄₈ 20¹⁵⁄₁₆ 15⁵⁄₈ 43¹⁄₈ 5¹³⁄₁₆ 12¹⁄₂ 12³⁄₈ 11¹⁄₄ 7³⁄₁₆ 1⁵⁄₈ 2¹¹⁄₁₆ 12⁷⁄₁₆ 19³⁄₄ 5¹⁄₂ 4⁷⁄₈ 11⁷⁄₈ 8³⁄₁₆ 21¹⁄₈ ¹⁄₄ ¹⁄₈ 1 89⁷⁄₈ 22⁷⁄₈ 18 22¹⁵⁄₁₆ 19⁵⁄₈ 25³⁄₄ 18 52⁹⁄₁₆ 6²³⁄₃₂ 16⁹⁄₁₆ 14⁷⁄₁₆ 14¹⁄₂ 8³⁄₈ 1²³⁄₃₂ 3³⁄₁₆ 14¹³⁄₃₂ 24³⁄₄ 6¹⁄₄ 4³⁄₄ 14¹³⁄₁₆ 9⁹⁄₁₆ 26¹⁵⁄₁₆ ¹⁄₄ ¹⁄₈ 1 1291 24¹⁄₈ 20¹⁄₂ 24 22¹⁄₂ 27³⁄₈ 20¹⁄₂ 52⁹⁄₁₆ 7²⁵⁄₃₂ 16⁹⁄₁₆ 16⁷⁄₁₆ 14¹⁄₂ 9⁵⁄₈ 1²³⁄₃₂ 3⁹⁄₁₆ 14¹³⁄₃₂ 24³⁄₄ 7¹⁄₄ 5³⁄₄ 14¹³⁄₁₆ 11 26¹⁵⁄₁₆ ¹⁄₄ ¹⁄₈ 1 147

1¹⁄₈ 28⁵⁄₁₆ 22¹³⁄₁₆ 28 25⁵⁄₁₆ 32 22¹³⁄₁₆ 62¹⁵⁄₁₆ 8⁵⁄₈ 20⁵⁄₈ 18⁵⁄₈ 17¹⁄₂ 10³⁄₁₆ 1⁷⁄₈ 4¹⁄₈ 16⁷⁄₁₆ 29¹⁵⁄₁₆ 8¹⁄₄ 6³⁄₄ 18¹⁄₈ 12⁵⁄₁₆ 32⁷⁄₁₆ ¹⁄₄ ¹⁄₈ 1 2081¹⁄₄ 29¹⁄₂ 25¹⁄₄ 29 28 33¹⁄₂ 25¹⁄₄ 62¹⁵⁄₁₆ 9⁹⁄₁₆ 20⁵⁄₈ 20¹⁄₂ 17¹⁄₂ 12 1¹⁵⁄₁₆ 4¹⁄₂ 16⁷⁄₁₆ 29¹⁵⁄₁₆ 9¹⁄₂ 8 18¹⁄₈ 13³⁄₄ 32⁷⁄₁₆ ¹⁄₄ ¹⁄₈ 1 2151³⁄₈ 32¹⁄₄ 26¹¹⁄₁₆ 31¹⁄₄ 30⁵⁄₁₆ 37¹⁄₁₆ 26¹¹⁄₁₆ 68⁹⁄₁₆ 9¹³⁄₁₆ 22³⁄₄ 22⁵⁄₈ 19¹⁄₂ 12³⁄₄ 1¹⁵⁄₁₆ 5¹⁄₁₆ 17⁷⁄₈ 32⁹⁄₁₆ 9⁷⁄₈ 8³⁄₈ 19³⁄₄ 14¹⁵⁄₁₆ 35³⁄₁₆ ¹⁄₄ ¹⁄₈ 1³⁄₁₆ 271

1¹⁄₂ 34⁷⁄₈ 28¹⁵⁄₁₆ 33¹¹⁄₁₆ 33 40¹⁄₈ 28¹⁵⁄₁₆ 74¹⁄₈ 10³⁄₄ 24³⁄₄ 24⁵⁄₈ 21 13⁷⁄₈ 1¹⁵⁄₁₆ 5¹⁄₂ 18¹⁵⁄₁₆ 35⁵⁄₁₆ 11 9¹⁄₂ 21³⁄₄ 16¹⁄₄ 38⁷⁄₁₆ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 3491³⁄₄ 40¹⁄₁₆ 33¹⁄₂ 38⁵⁄₈ 38³⁄₈ 46⁵⁄₁₆ 33¹⁄₂ 89¹⁄₂ 12³⁄₈ 28⁷⁄₈ 28³⁄₄ 24 16¹⁄₁₆ 2¹⁄₄ 6⁷⁄₁₆ 21¹⁄₂ 18⁹⁄₁₆ 11¹³⁄₁₆ 9³⁄₄ 23¹⁄₄ 18⁷⁄₈ 17¹¹⁄₁₆ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 4352 48⁵⁄₁₆ 40⁷⁄₈ 46³⁄₄ 45¹⁵⁄₁₆ 54⁵⁄₈ 40⁷⁄₈ 102 16¹⁄₄ 32⁷⁄₈ 32³⁄₄ 28¹⁄₂ 19¹³⁄₁₆ 2 7⁵⁄₁₆ 24¹⁄₄ 20⁹⁄₁₆ 12³⁄₄ 10³⁄₄ 26³⁄₄ 22⁵⁄₈ 19¹¹⁄₁₆ ³⁄₈ ³⁄₁₆ 1¹¹⁄₁₆ 715

2¹⁄₄ 54¹³⁄₁₆ 45³⁄₄ 52⁷⁄₈ 51⁵⁄₈ 61¹³⁄₁₆ 45³⁄₄ 113¹⁄₂ 18³⁄₈ 36¹⁵⁄₁₆ 36¹³⁄₁₆ 32¹⁄₂ 22⁵⁄₁₆ 2 8³⁄₁₆ 27 21¹⁄₈ 12 7¹⁄₂ 29³⁄₄ 25³⁄₈ 20 ¹⁄₂ ¹⁄₄ 2³⁄₁₆ 11602¹⁄₂ 60³⁄₁₆ 50⁷⁄₁₆ 57⁷⁄₈ 57³⁄₁₆ 68 50⁷⁄₁₆ 125 20³⁄₈ 41 40⁷⁄₈ 35¹⁄₂ 24¹¹⁄₁₆ 2 9¹⁄₁₆ 29 23¹⁄₈ 12 7¹⁄₂ 33¹⁄₄ 28¹⁄₁₆ 22 ¹⁄₂ ¹⁄₄ 2³⁄₁₆ 1400

OVERALL DIMENSIONS — †OUTLET DIMENSIONS—OUTSIDE — *

DUPLEX FAN DIMENSIONS

Unitary Fans are available in either clockwise (shown) or counter-clockwise rotation.Bottom Horizontal discharge shown. Other discharges available.

TYPE DFB — SIZES ¹/₂ THRU 1³/₄

TYPE DFC — SIZES ³/₄ THRU 1¹/₂

TYPE DFB — SIZE 2

TYPE DFC — SIZES 1³/₄ THRU 2¹/₂

TYPE DFB DUPLEX FANKEYWAY IN

SHAFTFAN BHD UBD THD DRIVE HUB

EXT. WEIGHTSIZE A† B† A† B† A† B† C† D E* F* G H J K L M N O P R S WIDTH DEPTH DIA. LBS

¹⁄₂ ** 13¹⁄₈ 11¹⁄₄ 13¹⁵⁄₁₆ 11⁹⁄₁₆ 14¹⁵⁄₁₆ 11¹⁄₄ 29³⁄₈ 4⁷⁄₁₆ 7¹⁄₂ 7¹⁄₈ 8¹⁄₄ 4⁷⁄₈ 1¹⁄₄ ⁷⁄₁₆ 9¹⁄₁₆ 13⁵⁄₁₆ 5¹⁄₈ 3³⁄₄ 7 5⁹⁄₁₆ 12¹³⁄₁₆ 1 50⁵⁄₈ ** 15³⁄₄ 13¹⁄₂ 16⁷⁄₁₆ 14¹⁄₁₆ 17¹³⁄₁₆ 13¹⁄₂ 33⁷⁄₈ 5⁷⁄₁₆ 9 8⁵⁄₈ 9³⁄₄ 6 1¹⁄₄ ⁹⁄₁₆ 9¹³⁄₁₆ 15⁹⁄₁₆ 5³⁄₈ 4¹⁄₂ 8¹⁄₂ 6¹³⁄₁₆ 15¹⁄₁₆ 1 60³⁄₄ 18⁷⁄₁₆ 15⁵⁄₈ 18¹¹⁄₁₆ 16⁷⁄₈ 20¹⁵⁄₁₆ 15⁵⁄₈ 39³⁄₈ 5⁷⁄₈ 10⁵⁄₈ 12³⁄₈ 11¹⁄₄ 7³⁄₁₆ 1⁹⁄₁₆ 2 ¹¹⁄₁₆ 11¹⁄₂ 17⁷⁄₈ 5¹⁄₂ 4⁷⁄₈ 10 8³⁄₁₆ 17³⁄₈ ¹⁄₄ ¹⁄₈ 1 85

⁷⁄₈ 22⁷⁄₈ 18 22¹⁵⁄₁₆ 19⁵⁄₈ 25³⁄₄ 18 46¹⁵⁄₁₆ 6³⁄₄ 13³⁄₄ 14⁷⁄₁₆ 14¹⁄₂ 8³⁄₈ 1¹¹⁄₁₆ 3 ³⁄₁₆ 13 21¹⁵⁄₁₆ 6¹⁄₄ 4³⁄₄ 12 9⁹⁄₁₆ 21⁵⁄₁₆ ¹⁄₄ ¹⁄₈ 1 1211 24¹⁄₈ 20¹⁄₂ 24 22¹⁄₂ 27³⁄₈ 20¹⁄₂ 46¹⁵⁄₁₆ 7¹³⁄₁₆ 13³⁄₄ 16⁷⁄₁₆ 14¹⁄₂ 9⁵⁄₈ 1¹¹⁄₁₆ 3 ⁹⁄₁₆ 13 21¹⁵⁄₁₆ 7¹⁄₄ 5³⁄₄ 12 11 21⁵⁄₁₆ ¹⁄₄ ¹⁄₈ 1 1351¹⁄₈ 28⁵⁄₁₆ 22¹³⁄₁₆ 28 25⁵⁄₁₆ 32 22¹³⁄₁₆ 56¹¹⁄₁₆ 8¹¹⁄₁₆ 17¹⁄₂ 18⁵⁄₈ 17¹⁄₂ 10¹³⁄₁₆ 1¹³⁄₁₆ 4 ¹⁄₈ 14⁷⁄₈ 26¹³⁄₁₆ 8¹⁄₄ 6³⁄₄ 15 12⁵⁄₁₆ 26³⁄₁₆ ¹⁄₄ ¹⁄₈ 1 192

1¹⁄₄ 29¹⁄₂ 25¹⁄₄ 29 28 33¹⁄₂ 25¹⁄₄ 56¹¹⁄₁₆ 9¹¹⁄₁₆ 17¹⁄₂ 20¹⁄₂ 17¹⁄₂ 12 1¹³⁄₁₆ 4 ¹⁄₂ 14⁷⁄₈ 26¹³⁄₁₆ 9¹⁄₂ 8 15 13³⁄₄ 26³⁄₁₆ ¹⁄₄ ¹⁄₈ 1 1951³⁄₈ 32¹⁄₄ 26¹¹⁄₁₆ 31¹⁄₄ 30⁵⁄₁₆ 37¹⁄₁₆ 26¹¹⁄₁₆ 62¹⁄₁₆ 9⁷⁄₈ 19¹⁄₂ 22⁵⁄₈ 19¹⁄₂ 12³⁄₄ 1⁷⁄₈ 5 ¹⁄₁₆ 16¹⁄₄ 29⁵⁄₁₆ 10¹⁄₄ 8³⁄₄ 16¹⁄₂ 14¹⁵⁄₁₆ 28¹¹⁄₁₆ ¹⁄₄ ¹⁄₈ 1³⁄₁₆ 2551¹⁄₂ 34⁷⁄₈ 28¹⁵⁄₁₆ 33¹¹⁄₁₆ 33 40¹⁄₈ 28¹⁵⁄₁₆ 66⁵⁄₈ 10¹³⁄₁₆ 21 24⁵⁄₈ 21 13⁷⁄₈ 1⁷⁄₈ 5 ¹⁄₂ 17¹⁄₁₆ 31⁹⁄₁₆ 11 9¹⁄₂ 18 16¹⁄₄ 30¹⁵⁄₁₆ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 315

1³⁄₄ 40¹⁄₁₆ 33¹⁄₂ 38⁵⁄₈ 38³⁄₈ 46⁵⁄₁₆ 33¹⁄₂ 76⁷⁄₈ 12⁷⁄₁₆ 24¹⁄₄ 28³⁄₄ 24 16¹⁄₁₆ 2³⁄₁₆ 6 ⁷⁄₁₆ 18³⁄₄ 37³⁄₁₆ 11¹⁄₈ 9⁵⁄₈ 20¹⁵⁄₁₆ 18⁷⁄₈ 36⁵⁄₁₆ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 4902 48⁵⁄₁₆ 40⁷⁄₈ 46³⁄₄ 45¹⁄₄ 53¹⁵⁄₁₆ 40⁷⁄₈ 89 16¹⁄₄ 27⁵⁄₈ 32³⁄₄ 28¹⁄₂ 19¹³⁄₁₆ 2 7 ⁵⁄₁₆ 20¹⁄₂ 18 12³⁄₄ 10³⁄₄ 24 22⁵⁄₈ 17¹⁄₈ ³⁄₈ ³⁄₁₆ 1⁷⁄₁₆ 636

OVERALL DIMENSIONS — †OUTLET DIMENSIONS - OUTSIDE — *SIZES ¹⁄₂ & ⁵⁄₈ ARE TYPE DF — **

31

UNI-COMBUSTION FANS

Complete fan assemblies andparts for supplying combustion airfor oil, gas and coal firing. Built in11 basic sizes with capacities from200 to 24,000 CFM at static pres-sures to 10” W.G. with vortex inletdamper control for improved vol-ume regulation and power saving.Specify Bulletin 18001.

FUME HOOD FANS

Complete Fan Assembliesincluding fans, housings, drivesand covers for exhausting fumesfrom industrial and institutionallaboratory hoods or other corro-sive fume exhaust systems.Completely packaged, ready-to-run in four basic sizes with capaci-ties from 250 to 6300 CFM at stat-ic pressures to 5” W.G. Availablewith Forward Curved or BackwardInclined fan wheels.Specify Bulletin 26001.

UNITARY, SINGLE ANDDUPLEX FANS

Complete fan assemblies, partsor kits designed for heavy dutyapplications, including ovens, dry-ers, air conditioning units, heaters,coolers, condensers and air cur-tains. Fully riveted or staked fanwheels with welded housings.Capacities from 150 to 88,000CFM at static pressures to 8” W.G.and temperatures to 1000º F.Specify Bulletin 6131.

495 Wegner DriveWest Chicago, IL 60185Phone: 630/876-1495Fax: 630/876-1497e-mail: dffan@dffan.comInternet Home Page: http://www.dffan.com

Wheel Diameters 6-1/2” through 32-1/2”Custom Fan Assemblies & KitsIndividual Wheels, Housings, and ComponentParts AvailableAluminum, Stainless Steel, Monel, and GalvanizedSteel Construction

Arrangement 4E Assembly

UC Wheel -Internal Hub

UC Wheel -External Hub

Multiple Width Wheels

Fume Hood Fan Assembly

Fume Hood Wheels WithPressure Bars

DFB Duplex Fan Assembly

DF Wheel

1/98