Turning Air Into Solutions. BACKWARD CURVED HIGH PRESSURE FANS MODEL BCS

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1 Turning Air Into Solutions. BACKWARD CURVED HIH PRESSURE FANS MODEL BCS CATALOUE M400 December 203

2 CentrifugalFans Model BCS Backward Curved - High Pressure The BCS fan from Twin City Fan & Blower is a high efficiency backward curved industrial fan designed for handling relatively clean air in high pressure applications. Typical applications include combustion air, product cooling, moisture blow-off, forced draft on fluid bed boilers, and induced draft after baghouse process blowers. Because the BCS features a wider impeller and housing, producing a high volume of air at a lower velocity, the need for an expansion evasé is eliminated. BCS fans are available with a variety of construction options and accessories, offering the versatility and flexibility required in today's industrial applications. Arrangement 9F Sizes 49 to 2260 mm impeller diameters Performance Airflow to 200 m 3 /sec at 500 Pa Static pressure to 9945 Pa Airstream temperatures to 425 C Arrangements, 3SI, 4, 7SI, 8, 9 and 9F Drive Configurations Available in both direct and belt drive configurations. Construction Design 4 for tip speeds up to 70 m/s Design 7 for tip speeds up to 85 m/s Design 22 for tip speeds up to m/s Design 26 for tip speeds up to 30 m/s Arrangement with unitary base and belt guard Housings Heavy-gauge, reinforced, continuously welded housings provide strength and durability for extended service life a necessity in all commercial and industrial installations. Outlet flanges for duct-connection as well as rigidity are standard. Inlet collars for slip-joint connection and lifting lugs are also standard. All housings are reinforced with rigid bracing to increase structural integrity. The support angles are intermittently welded and caulked between welds to prevent bleed-through corrosion. Precisely positioned cutoff plates and aerodynamically spun inlet cones provide high efficiency and smooth airflow through the fan. 2 Twin City Fan Catalogue M400

3 ConstructionFeatures BCS Impeller The BCS impeller features heavy-gauge steel construction and a non-overloading impeller design, suitable for applications requiring large volumes of air at moderate to high pressures. The high efficiency impeller features backward curved blades of single thickness, continuously welded to the rim and backplate. A conical spun shroud (rim) makes BCS fans less susceptible to the performance losses associated with poor inlet conditions. All BCS impellers are statically and dynamically balanced to grade 6.3 per ANSI S2.9 (3.8 mm/s rms) for smooth operation prior to assembly of the fan, followed by a final balance of the entire rotating assembly. Shaft Shafts are AISI-8, 40 or 45 hot-rolled steel accurately turned, ground, polished, and ring gauged for accuracy. Shafts are generously sized for first critical speed of at least.43 times the maximum speed for the class. BCS Impeller Bearings Bearings are heavy-duty, grease-lubricated, anti-friction ball or roller, self-aligning, pillow block type and are selected for minimum average bearing life L in excess of 40,000 hours at the maximum fan RPM. Rotation and Discharge Both clockwise and counterclockwise rotations are available in various standard discharge positions. See drawings on pages Temperature Limits Standard construction designed for temperatures up to 50 C. Optional construction available to handle up to 425 C. See page 7. Outlet Flange Punched outlet flange is provided as standard construction on all sizes. Arrangement Mechanical Run Test & Final Vibration Check All fans are assembled for a mechanical run test as well as final balance prior to shipment. Vibration readings are taken on both fan bearings in the axial, horizontal, and vertical directions at the specified speed. Fans are balanced to 3.8 mm/s rms. peak or less. Special Materials BCS fans can be constructed of special materials such as aluminum or stainless steel. 203 Twin City Fan Companies, Ltd., Minneapolis, MN. All rights reserved. Catalog 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 construction at any time without notice. 3

4 OptionalConstruction Fan with Split Housing Split Housing A flanged horizontal split housing is available on the fan s centerline. A pie-shaped split is also available for impeller removal without disturbing the ductwork. High Temperature Construction Airstream temperatures above 50 C require high temperature construction. See page 7 for construction requirements. Insulation pins and complete fan insulation are available. Spark Resistant Construction Fan applications may involve the handling of potentially explosive or flammable particles, fumes or vapour. Such applications require careful consideration by the system designer to insure the safe handling of such gases. Twin City Fan & Blower offers the following classifications of spark resistant construction per AMCA Standard It is the specifier or the user s responsibility to specify the type of spark resistant construction with full recognition of the potential hazards and the degree of protection required. Type A: All parts of the fan in contact with the air or gas being handled shall be made of nonferrous material usually aluminum and limited to 20 C. Type B: The fan shall have a nonferrous impeller or impeller and nonferrous ring about the opening through which the shaft passes usually aluminum impeller and anti-spark track and limited to 20 C. Type C: The fan shall be so constructed that a shift of the impeller or impeller or shaft will not permit two ferrous parts of the fan to rub or strike. This is accomplished with an aluminum inlet cone and anti-spark track. This construction is limited to 260 C Construction to 425 C is available using a steel inlet cone with copper/bronze lining. Notes:. Bearings shall be placed outside the airstream. Therefore, do not use Arrangement 3 or The user shall electrically earth all fan parts. Refer to AMCA Standard for full details. InletBoxes Typical Detached Inlet Box Dimensions C A To Suit Fan D B F FAN SIZE A B C MAX. D MAX. INLET AREA (m 2 ) F MAX Dimensions are not to be used for construction. Dimensions are in inches unless otherwise noted. 4 Twin City Fan Catalogue M400

5 InletBoxPositions INLET BOX POSITION OF POSITION NO. INLET BOXES 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 NOTES:. Reference line is the top vertical axis through center of fan shaft. 2. Position of inlet box and air entry to inlet box is determined from drive side of fan. 3. Position on inlet box is designated in degrees clockwise from top vertical axis as shown. 4. Positions 35 to 225 in some cases interfere seriously with floor structure Inlet Box Inlet Box Fan Fan Subbase Arr. Fan With Detached Inlet Box Can Be Supplied in Arr. 8 Arr. Fan With Attached or Integral Inlet Box Can Be Supplied in Arr. 8 Inlet Box Fan Fan Inlet Box Coupling Motor Concrete Steel Base Arr. 3SI Fan With Integral Inlet Box, Centrally Supported Impeller, Independent Bearing Pedestal To Be Installed on Concrete Pedestals Arr. 7SI Fan Similar to Arr. 3SI Except Bearing Pedestal & Motor Installed On Steel Common Base 5

6 ProductAccessories Inlet Box An inlet box is designed to minimize pressure drop and is recommended for applications where uniform flow is difficult to obtain due to limited space. Inlet boxes can be designed to be either detachable or integral to the fan. Inlet Box Damper The inlet box damper pre-spins the air in the direction of impeller rotation, resulting in a savings in consumed power at reduced loads. Outlet Dampers Double surface aerofoil blades are available in either parallel or opposed blade design. Belt & Shaft uard Fan uards Shaft, bearing, and belt guards are available in OSHA type designs. Access Door Bolted, quick-opening, and raised bolted access doors are available for impeller inspection or maintenance. Quick-Open Access Door Bolted Access Door Raised Bolted Access Door Variable Inlet Vanes Variable inlet vanes are available to provide economical, stable, and efficient air volume control for manual or motorized operation. Nested inlet vanes are available for Design 7 and are suitable for temperatures to 50 C. External inlet vanes are available for Design 22 and 26 and are suitable for temperatures to 50 C. Construction to 35 C is available for both. Shaft Seals A variety of shaft seals are available to prevent contaminants in the airstream from passing through the shaft hole in the fan housing. The shaft seal is provided as standard on all fans with applications over 50 C and fans with split housings. Although shaft seals minimize air leakage, they are not an airtight design. Nested Inlet Vanes Safety Screen External Inlet Vanes Shaft Seal Drain All fans are constructed with a drain hole in the bottom of the housing. A threaded pipe coupling is welded to the lowest point in the housing scroll to permit wash water or condensation to drain from the fan. Flanged Inlet A punched inlet flange is available for duct mounting. Temperature and Vibration Detectors Thermocouples or RTDs are available to install on the bearings. A variety of vibration switches are available. Vibration Isolation Bases Structural angle, structural channel, inertia bases, and unitary bases are available with or without spring isolators. Screens Safety screens are available for mounting in the fan inlet or outlet in non-ducted applications. 6 Twin City Fan Catalogue M400

7 AIRSTREAM TEMPERATURE ( C) IMPELLER MATERIAL STANDARD STEEL DES. 7 DES. 4,,22, Above 425 Consult Factory High Temperature Derating Factors When elevated temperatures are encountered, maximum RPM allowable must be derated according to the table on the left. For stainless steel derates, contact the factory. EngineeringData TEMPERATURE ( C) 30 to 50 5 to to to 425 TYPE OF BEARIN Ball or Roller Ball or Roller Ball or Roller Ball or Roller LUBRICATION OTR REQUIREMENTS AVAILABLE ARRANE- MENTS rease Standard Fan, 8, 9, 9F High Temp. rease High Temp. rease High Temp. rease Shaft Cooler, Shaft Seal Expansion & Non- Expansion Bearings Same as 5 to 260 With Additional of High Temp Aluminum Paint Same as 26 to 35 With Modification of Bearing Pedestal, 8, 9, 9F, 8, 9, 9F, 8, 9F High Temperature Construction Requirements The BCS product line is perfectly suited for high temperature airstream applications. The chart on the left refers to fans of carbon steel construction. When aluminum (spark resistant) or stainless steel construction is required, additional fan modifications may be required. Contact factory in these cases. Performance Correction For Temperature & Altitude The performance curves in this catalogue are based on fans handling standard air at a density of.2 kg/m 3. This is equivalent to air at 2 C at sea level (.325 kpa barometric pressure). Thus, when specified performance is at a density different than Temperature and Altitude Density Ratios AIR TEMP C standard, it must be converted to the equivalent standard conditions before entering the performance curves. The equivalent standard conditions can be calculated by using the Temperature and Altitude Density Ratios shown below. ALTITUDE IN METRES ABOVE SEA LEVEL BAROMETRIC PRESSURE IN kpa

8 EngineeringData Maximum RPM, Impeller Weights & WR 2 DESIN 4 DESIN 7 DESIN 22 DESIN 26 FAN SIZE MAX. WEIHT WR 2 MAX. WEIHT WR 2 MAX. WEIHT WR 2 MAX. WEIHT WR 2 RPM (kg) (kg-m 2 ) RPM (kg) (kg-m 2 ) RPM (kg) (kg-m 2 ) RPM (kg) (kg-m 2 ) * * Maximum operating speed is limited to 4000 RPM. RPM listed above 4000 is for derating due to elevated temperatures. Shaft & Bearings Data FAN SIZE ARRANEMENT, 9 & 9F ARRANEMENT 8 DESIN BCS MAX. SHAFT SHAFT BRS. BRS. MTR. Kw DIA. DIA SDB 25 SDB-C 7 42 HDB 30 SDB-C HDB 25 SDB-C RB-C 38 SDB-C 4 38 HDB 25 SDB-C RB-C 46 SDB-C 4 42 HDB 30 SDB-C RB-C 50 SDB-C RB-C 46 SDB-C 4 50 HDB 30 HDB-C RB-C 55 HDB-C RB-C 55 HDB-C HDB 38 SDB-C RB-C 55 HDB-C RB-C 55 SDB-C SRB 55 HDB-C HDB 38 HDB RB-C 65 HDB-C RB-C 55 SDB-C SRB 65 HDB-C HSB 42 HDB RB-C 65 HDB-C RB-C 65 HDB-C SRB 65 RB-C HDB 42 RB RB-C 50 RB RB-C 65 RB-C SRB 70 RB-C RB 50 RB 7 75 RB-C 55 RB RB-C 65 RB-C SRB 75 RB-C FAN SIZE ARRANEMENT, 9 & 9F ARRANEMENT 8 DESIN BCS MAX. SHAFT SHAFT BRS. BRS. MTR. Kw DIA. DIA RB 55 RB RB-C 75 HDB RB-C 75 RB-C SRB 75 RB-C RB 55 RB RB-C 70 RB-C RB-C 75 RB-C SRB 90 RB-C RB 70 RB RB-C 75 RB-C RB-C 90 RB-C SRB 90 RB-C RB 70 RB RB-C 75 RB SRB 90 RB-C SRB 0 RB-C 4 0 RB 90 RB RB-C 90 RB SRB 0 RB-C SRB 25 RB-C RB 90 RB RB-C 0 RB SRB 5 RB-C Enquire SRB 25 RB-C SRB 0 RB SRB 5 RB SRB 5 RB Enquire SRB Enquire SRB SRB 5 RB SRB 25 RB SRB 25 RB-C Enquire SRB Enquire HSRB BEARIN CODES: SDB = Standard Duty Ball Bearing HDB = Heavy Duty Ball Bearing RB = Roller Bearing RB-C = Concentric Roller Bearing SRB = Roller Bearing with Split Pillow Block Housing HSRB = Hig-Speed Roller Bearing with Split Pillow Block Housing 8 Twin City Fan Catalogue M400

9 Bare Fan Weights (kg) FAN DESIN 4 DESIN 7 DESIN 22 DESIN 26 SIZE ARR. ARR. 8 ARR. 9 ARR. 9F ARR. ARR. 8 ARR. 9 ARR. 9F ARR. ARR. 8 ARR. 9 ARR. 9F ARR. ARR EngineeringData 9

10 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 4, RPM 2, RPM 2500 RPM 7.5kW, RPM 5.5kW 800 4kW RPM 3kW 2.2kW 400.5kW.kW 960 RPM 0.75kW kW 720 RPM % Eff. 72% Pk. Eff. BCS kW 0.25kW 0.8kW % Eff qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

11 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 4,000 2,000, RPM RPM BCS RPM 2850 RPM 2500 RPM 2000 RPM 450 RPM 3kW 2.2kW.5kW.kW 0.75kW 0.55kW kw 7.5kW 5.5kW 4kW PerformanceCurves % Eff. 73% Pk. Eff. 62% Eff. 0.37kW 0.25kW 0.8kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard 30.

12 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 5,000 3,000, RPM BCS RPM 2850 RPM 2500 RPM 2000 RPM 8.5kW 5kW kw 7.5kW 450 RPM 5.5kW 4kW 3kW 2.2kW.5kW.kW RPM % Eff. 73% Pk. Eff. 62% Eff. 0.75kW 0.55kW 0.37kW 0.25kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

13 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 6,000 4,000 2,000, RPM 960 RPM 450 RPM BCS RPM 2850 RPM 2500 RPM 3500 RPM.kW 0.75kW.5kW 3kW 2.2kW 4kW 7.5kW 5.5kW kw 37kW 30kW 22kW 8.5kW 5kW PerformanceCurves RPM % Eff. 77% Pk. Eff % Eff. 0.55kW 0.37kW 0.25kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

14 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 8,000 6,000 4,000 2,000, RPM 720 RPM 960 RPM 450 RPM 2500 RPM 2000 RPM BCS RPM 2850 RPM.kW 0.75kW.5kW 3kW 2.2kW 4kW 7.5kW 5.5kW 22kW 8.5kW 5kW kw 55kW 45kW 37kW 30kW % Eff. 78% Pk. Eff. 68% Eff. 0.37kW 0.25kW 0.55kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

15 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa),000 8,000 6,000 4,000 2,000, RPM 960 RPM 450 RPM BCS RPM 2850 RPM 2500 RPM 3500 RPM 3kW 4kW 7.5kW 5.5kW kw 22kW 8.5kW 5kW 55kW 45kW 37kW 30kW 90kW 75kW PerformanceCurves RPM % Eff. 86% Pk. Eff. 74% Eff. 0.37kW 0.75kW 0.55kW.5kW.kW 2.2kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

16 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 8,000 6,000 4,000 2,000, RPM 960 RPM BCS RPM 2000 RPM 2850 RPM 2500 RPM 4kW 7.5kW 5.5kW kw 22kW 8.5kW 5kW 37kW 30kW 55kW 45kW 90kW 75kW 3kW 500 RPM 2.2kW % Eff. 86% Pk. Eff..5kW.kW 0.75kW 0.55kW qv - Flow (m³ / sec) 74% Eff qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

17 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa),000 8,000 6,000 4,000 2,000, RPM 960 RPM 450 RPM BCS RPM 2850 RPM 2500 RPM 5.5kW 7.5kW 22kW 8.5kW 5kW kw 55kW 45kW 37kW 30kW 32kW kw 90kW 75kW PerformanceCurves RPM % Eff. 86% Pk. Eff. 74% Eff..kW.5kW 3kW 2.2kW 4kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

18 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa),000 8,000 6,000 4,000 2,000, RPM 720 RPM BCS RPM 450 RPM 2500 RPM 2000 RPM 3kW 2.2kW 4kW 7.5kW 5.5kW 22kW 8.5kW 5kW kw 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW RPM 82% Eff. 86% Pk. Eff. 74% Eff. 0.55kW 0.37kW.kW 0.75kW.5kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

19 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 6,000 4,000 2,000, RPM 720 RPM 960 RPM BCS RPM 2000 RPM 4kW 7.5kW 5.5kW kw 22kW 8.5kW 5kW 45kW 37kW 30kW 55kW kw 90kW 75kW 32kW PerformanceCurves RPM 3kW 2.2kW % Eff. 86% Pk. Eff..5kW.kW 0.75kW 0.55kW qv - Flow (m³ / sec) 74% Eff qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

20 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa),000 8,000 6,000 4,000 2,000, RPM 720 RPM 960 RPM BCS RPM 2000 RPM 7.5kW 22kW 8.5kW 5kW kw 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW % Eff. 86% Pk. Eff. 74% Eff. 5.5kW 4kW 3kW 2.2kW.5kW.kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

21 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 20,000,000 8,000 6,000 4,000 2,000, RPM 720 RPM BCS RPM 450 RPM 2000 RPM kw 22kW 8.5kW 5kW 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW PerformanceCurves RPM % Eff. 7.5kW 5.5kW 4kW 3kW 2.2kW 0.5kW qv - Flow (m³ / sec) 86% Pk. Eff. 75% Eff qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

22 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 6,000 4,000 2,000, RPM 500 RPM BCS RPM 960 RPM 4kW 450 RPM 7.5kW 5.5kW kw 22kW 8.5kW 5kW 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW RPM % Eff. 85% Pk. Eff. 74% Eff..kW 0.75kW.5kW 3kW 2.2kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

23 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 8,000 6,000 4,000 2,000, RPM RPM % Eff. 86% Pk. Eff. 500 RPM 74% Eff..kW 720 RPM.5kW BCS 600 3kW 2.2kW 960 RPM 4kW 7.5kW 5.5kW 450 RPM kw 30kW 22kW 8.5kW 5kW 55kW 45kW 37kW 60kW 32kW kw 90kW 75kW PerformanceCurves qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

24 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa),000 7,000 5,000 3,000, RPM 500 RPM BCS RPM 960 RPM 450 RPM 22kW 8.5kW 5kW 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW kw RPM 0 83% Eff % Pk. Eff. 74% Eff. 7.5kW 5.5kW 4kW 3kW 2.2kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

25 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 6,000 4,000 2,000, RPM 300 RPM BCS RPM 720 RPM 7.5kW 960 RPM kw 22kW 8.5kW 5kW 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW PerformanceCurves RPM % Eff. 85% Pk. Eff. 73% Eff. 5.5kW 4kW 3kW 2.2kW.5kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

26 PerformanceCurves Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 6,000 4,000 2,000, RPM RPM RPM % Pk. Eff. 73% Eff. 82% Eff. 500 RPM 3kW 2.2kW 4kW BCS RPM 7.5kW 5.5kW kw 960 RPM 22kW 8.5kW 5kW 55kW 45kW 37kW 30kW 60kW 32kW kw 90kW 75kW qv - Flow (m³ / sec) qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard Twin City Fan Catalogue M400

27 Pf - Fan Total Pressure (in W..) Pf - Fan Total Pressure (Pa) 7,000 5,000 3,000, RPM RPM 82% Eff. 86% Pk. Eff. 300 RPM 74% Eff. 500 RPM 4kW BCS kW 7.5kW 720 RPM 22kW 8.5kW 5kW kw 960 RPM 55kW 45kW 37kW 30kW qv - Flow (m³ / sec) 60kW 32kW kw 90kW 75kW PerformanceCurves qv - Flow (CFM) (in Thousands) Notes:. Performance certified is for Installation Type B & D: Free or ducted inlet, ducted outlet. 2. Power rating (kw) does not include transmission losses. 3. Performance ratings do not include the effects of appurtenances (accessories). 4. The sound power level ratings shown are in decibels, referred to E-2 watts calculated per AMCA Standard Values shown are for inlet LwiA sound power levels for Installation Type B: Free inlet, ducted outlet. 6. Ratings do not include the effects of duct end correction. 7. The A-weighted sound ratings shown have been calculated per AMCA Standard

28 DimensionalData HQ A A. SIDES Arrangements & 9, Class 4 HA DISCH Q HC KL DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C DC MOTOR (ARR 9 ONLY) SEE NOTE 3 SD DIA. SHAFT SE B A. SCROLL BA BASE ANLES O.D. INLET C N H CW THD H HP HD HH HQ HC H HB HF HA HB HA HH H DA DD DE DF D CW DBD CW TAU CW UBD CW BAU CW BHD DISCH J NOTE 2 WITH OPTIONAL FLANED INLET K K L M FAN HS FAN SHAFT M AH DBD ONLY BH DIA. BASE HOLES FOUNDATION PLAN (FOR DBD SEE NOTE ) MOTOR LOCATION L (LEFT) SHOWN 2 8 Twin City Fan Catalogue M400

29 DA DC DD DE DF SIZE A AH B BA BH C ARR ARR 9 ARR ARR 9 ARR ARR 9 ARR ARR 9 ARR ARR 9 SEE NOTE x x x x x x x x x x x x x x x x x x DimensionalData SIZE D FR H DX A B C ARR ARR 9 ARR 9 ARR ARR 9 HA HB HC HD HF H x 25 32M x 32 60M x 32 60M x 32 60L x 32 60L x 38 80M x 38 80L x M x M x L x S x S x M x M x M x M x M x M SIZE HH HP HQ J K KL KS L P M N ARR ARR 9 ARR ARR 9 Q SD SE x x x x x x x x x x x x x x x x x x NOTES:. Punched outlet flanges are included on all discharges per AC4987, or for 'DBD' AC Optional punched inlet per AS 'CW' rotation is shown. 'CCW' rotation is similar but opposite. 4. For fans with inlet box at 90 o or 270 o use 'BAU' discharge dimension 'DF' for centerline height. 5. 'FR' equals maximum motor frame. AC704D 29

30 DimensionalData HQ A A. SIDES Arrangements & 9, Class 7 HA DISCH Q HC KL NOTE DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C DC NOTE 4 SE SD DIA. SHAFT B A. SCROLL BA BASE ANLES O.D. INLET C D H N CW THD H HP HD HH HQ HC H HB HF HA HB HA HH H DA DD DF D CW DBD CW TAU CW UBD CW BAU D CW BHD M M DISCH J NOTE 2 K K FAN HS FAN SHAFT WITH OPTIONAL FLANED INLET L BH DIA. BASE HOLES FOUNDATION PLAN (FOR DBD SEE NOTE ) 3 0 Twin City Fan Catalogue M400

31 DA DC DD DE SIZE A B BA BH C ARR ARR 9 ARR ARR 9 ARR ARR 9 ARR ARR 9 DF D SEE NOTE 4 FOR ARRANEMENT ARR ARR 9 ARR ARR x x x x x x x x x x x x x x x x x x DimensionalData SIZE DX FR H A B C D ARR 9 ARR ARR 9 HA HB HC HD HF H HH HP x 32 60L x 32 80L x L x L x L x M x M x M x M x M x M x M x M x M x M x M x M x M SIZE HQ J K KL L P SE KS M N Q SD ARR ARR 9 ARR ARR 9 ARR ARR 9 ARR ARR x x x x x x x x x x x x x x x x x x NOTES:. Punched outlet flanges are included on all discharges per AC4987, or for 'DBD' AC Optional punched inlet per AS 'CW' rotation is shown. 'CCW' rotation is similar but opposite. 4. For fans with inlet box at 90 o or 270 o use 'BAU' discharge dimension 'DF' for centerline height. 5. 'FR' equals maximum motor frame. BC4952E ARR. BC4955D ARR

32 DimensionalData Arrangements (Sizes ) & 9 (Sizes ), Class 22 HQ A A. SIDES HA DISCH Q HC KL NOTE DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C DC NOTE 4 SE SD DIA. SHAFT B A. SCROLL BA BASE ANLES O.D. INLET C H N CW THD H HP HD HH HQ HC H HB HF HA HB HA HH H DA DD DE DF D CW DBD CW TAU CW UBD CW BAU CW BHD M M DISCH J NOTE 2 WITH OPTIONAL FLANED INLET K K FAN HS FAN SHAFT L BH DIA. BASE HOLES FOUNDATION PLAN (FOR DBD SEE NOTE ) 3 2 Twin City Fan Catalogue M400

33 DA DC DD DE SIZE A B BA BH C ARR ARR 9 ARR ARR 9 ARR ARR 9 ARR ARR 9 DF D SEE NOTE 4 ARR ARR 9 ARR ARR x x x x x x x x x x x x x x x DimensionalData SIZE DX FR H A B C ARR 9 ARR ARR 9 HA HB HC HD HF H HH HP HQ x M x M x M x M x M x M x M x M x M x M x x x x x SIZE J K KL L P SE KS M N Q SD ARR ARR 9 ARR ARR 9 ARR ARR 9 ARR ARR x x x x x x x x x x x x x x x NOTES:. Punched outlet flanges are included on all discharges per AC4988, or for 'DBD' AC Optional punched inlet per AS 'CW' rotation is shown. 'CCW' rotation is similar but opposite. 4. For fans with inlet box at 90 o or 270 o use 'BAU' discharge dimension 'DF' for centerline height. 5. 'FR' equals maximum motor frame. BC4953D ARR. BC4956D ARR

34 DimensionalData HQ A A. SIDES Arrangement, Class 26 HA DISCH Q HC KL NOTE DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C DC SE SD DIA. SHAFT B A. SCROLL BA BASE ANLES O.D. INLET C N CW THD H H HP HB HD HH HQ HC H HA HB HF HH HA H DA DD DF D CW DBD CW TAU CW UBD CW BAU CW BHD DISCH J NOTE 2 WITH OPTIONAL FLANED INLET K K L M FAN HS FAN SHAFT M FOUNDATION PLAN (FOR DBD SEE NOTE ) BH DIA. BASE HOLES 3 4 Twin City Fan Catalogue M400

35 SIZE A B BA BH C DA DC DD DE SEE NOTE 4 DF D DX A x x x x x x x x x x x x x x x x x x x x x x x x x x SIZE B C H HA HB HC HD HF H HH HP HQ J K KL DimensionalData SIZE KS L M N P Q SD SE x x x x x x x x x x Enquire Enquire Enquire Enquire Enquire Enquire 38 BC4954C NOTES:. Punched outlet flanges are included on all discharges per AC4988, or for 'DBD' AC Optional punched inlet per AS 'CW' rotation is shown. 'CCW' rotation is similar but opposite. 4. For fans with inlet box at 90 o or 270 o use 'BAU' discharge dimension 'DF' for centerline height. 35

36 DimensionalData HQ A A. SIDES Arrangements 9F, Class 4 HA DISCH Q HC KL SE DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C O.D. INLET NOTE 3 DC SD DIA. SHAFT B A. SCROLL BA BASE ANLES V C H N CLOCKWISE ROTATION, TOP HORIZONTAL DISCHARE CW THD MOTOR LOCATION L (LEFT) SHOWN. SEE NOTE 3. H HP HD HH HQ HC H HB HF HA HB HA HH H DA DD DE DF D CW DBD CW TAU CW UBD CW BAU CW BHD J S M M AH DBD ONLY DISCH NOTE 2 WITH OPTIONAL FLANED INLET K K L T FAN HS FAN SHAFT FOUNDATION PLAN (FOR DBD SEE NOTE ) MOTOR LOCATION L (LEFT) SHOWN BH DIA. BASE HOLES 3 6 Twin City Fan Catalogue M400

37 SIZE A AH B BA BH C DA DC DD DE DF D DX FR A x x 25 32M x x 32 60L x x 32 60L x x 32 60L x x 32 80L x x 38 80L x x 38 80L x x L x x L x x M x x M x x M x x M x x M x x M x x M DimensionalData SIZE B C H HA HB HC HD HF H HH HP HQ J K KL KS x x x x x x x x x x x x x x x x 6 SIZE L M N P Q S SD SE T V AC705C NOTES:. Punched outlet flanges are included on all discharges per AC4986, or for 'DBD' AC Optional punched inlet per AS 'FR' equals maximum motor frame. 37

38 DimensionalData HQ A A. SIDES Arrangement 9F, Class 7 HA DISCH Q HC KL NOTE DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C SE O.D. INLET NOTE 3 DC SD DIA. SHAFT B A. SCROLL BA BASE ANLES C CLOCKWISE ROTATION, TOP HORIZONTAL DISCHARE CW THD MOTOR LOCATION L (LEFT) SHOWN. SEE NOTE 3. H N H HP HD HH HQ HC H HB HF HA HB HA HH H DA DD DE DF D CW DBD CW TAU CW UBD CW BAU D CW BHD J S DIA. BASE BH HOLES M M NOTE 2 DISCH K K L T MOTOR FAN HS FAN SHAFT WITH OPTIONAL FLANED INLET FOUNDATION PLAN (FOR DBD SEE NOTE ) MOTOR LOCATION L (LEFT) SHOWN 3 8 Twin City Fan Catalogue M400

39 SIZE A B BA BH C DA DC DD DE DF D DX FR x x 32 60L x x 32 80L x x L x x L x x L x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M 273 DimensionalData SIZE A B C D H HA HB HC HD HF H HH HP HQ SIZE J K KL KS L M N P Q S SD SE T V x x x x x x x x x x x x x x x x x x BC4957F NOTES:. Punched outlet flanges are included on all discharges per AC4987, or for 'DBD' AC Optional punched inlet per AS 'FR' equals maximum motor frame. 39

40 DimensionalData HQ A A. SIDES Arrangement 9F, Class 22 HA DISCH Q HC KL NOTE DX DISCH. FLANE KS KWY SIZE P OUTSIDE HOUSIN OUTSIDE HOUSIN A B J C SE O.D. INLET NOTE 3 DC SD DIA. SHAFT B A. SCROLL BA BASE ANLES C CLOCKWISE ROTATION, TOP HORIZONTAL DISCHARE CW THD MOTOR LOCATION L (LEFT) SHOWN. SEE NOTE 3. H N H HP HB HD HH HQ HC H HA HB HF HH HA H CW DBD DA DD CW TAU DE DF CW UBD CW BAU CW BHD D DISCH J NOTE 2 K K L T MOTOR S DIA. BASE BH HOLES M M FAN HS FAN SHAFT WITH OPTIONAL FLANED INLET FOUNDATION PLAN (FOR DBD SEE NOTE ) MOTOR LOCATION L (LEFT) SHOWN 4 0 Twin City Fan Catalogue M400

41 SIZE A B BA BH C DA DC DD DE DF D DX FR x x M x x M x x M x x M x x M x x M x x M x x M x x M x x M 727 SIZE A B C H HA HB HC HD HF H HH HP HQ DimensionalData SIZE J K KL KS L M N P Q S SD SE T V x x x x x x x x x x BC4958D NOTES:. Punched outlet flanges are included on all discharges per AC4988, or for 'DBD' AC Optional punched inlet per AS 'FR' equals maximum motor frame. 4

42 TypicalSpecifications Fans shall be Model BCS, Backward Curved High Pressure Blowers, as manufactured by Twin City Fan & Blower. PERFORMANCE Fans shall be tested in accordance with ANSI/AMCA Standard 2 (air performance) and 300 (sound performance) in an AMCA accredited laboratory. Fans shall have a sharply rising pressure characteristic extending through the operating range and continuing to rise beyond the peak efficiency to ensure quiet and stable operation. Fans shall have a non-overloading design with self-limiting horsepower characteristics and shall reach a peak in the normal selection area. CONSTRUCTION Fan housings and bearing pedestals shall be of heavy-gauge, continuously welded construction. Housings with partially welded construction are not acceptable. Housings shall be suitably braced to prevent vibration or pulsation. Discharge flanges shall be provided for rigidity and duct connection. Discharge flanges are punched as standard. All units are furnished with lifting lugs. IMPELLER BCS backward curved impellers shall be single thickness, designed for maximum efficiency and quiet operation, and shall be continuously welded to the rim and back plate. Partial welding is not acceptable on backward curved blades. All impellers shall be statically and dynamically balanced. SHAFT Shafts shall be AISI 8, 40 or 45 hot rolled steel, accurately turned, ground, polished, and ring gauged for accuracy. Shafts shall be sized for the first critical speed of at least.43 times the maximum speed. BEARINS Bearings shall be heavy duty, grease lubricated, anti-friction ball or roller, self-aligning, pillow block type and selected for a minimum average bearing life (AFBMA L-50) in excess of 200,000 hours at the maximum fan RPM. DRIVE Motor sheaves shall be cast iron, variable pitch on applications 20 HP and smaller, and fixed pitch on 25 HP and larger. Drives and belts shall be located external to the fan casing and rated for 50% of the required motor HP. FINISH AND COATIN The entire fan assembly, excluding the shaft, shall be thoroughly degreased and deburred before application of a rust-preventative primer. After the fan is completely assembled, a finish coat of paint shall be applied to the entire assembly. The fan shaft shall be coated with a petroleum-based rust protectant. Aluminum components shall be unpainted. ACCESSORIES When specified, accessories such as access doors, drains, inlet and outlet flanges, belt guards, shaft and bearing guards, outlet screens, outlet dampers, inlet vanes, spark resistant construction, split housings, high temperature construction, shaft seals, inlet boxes, and shaft coolers shall be provided by Twin City Fan & Blower to maintain one-source responsibility. FACTORY RUN TEST 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 impeller shall be statically and dynamically balanced in accordance with ANSI/AMCA Balance Quality and Vibration Levels for Fans to Fan Application Category BV-3, Balance Quality rade 6.3. Balance readings 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. UARANTEE The manufacturer shall guarantee the workmanship and materials for at least one () year from startup or eighteen (8) months from shipment, whichever occurs first. 4 2 Twin City Fan Catalogue M400

43 AlternativeCentrifugalFans BC-SW Backward Inclined Fans 3 mm to 2496 mm impeller diameters Airflow to 30 m 3 /sec Static pressure to 5000 Pa Airstream temperatures to 427 C Arrangements, 3, 3F, SI, 4, 7SI, 8, 9, 9F and Belt and direct drive configurations See Catalogue M300 for more information. BAE-SW Airfoil Fans 3 mm to 2496 mm impeller diameters Airflow to 30 m 3 /sec Static pressure to 5000 Pa Airstream temperatures to 427 C Arrangements, 3, 3F, 3SI, 4, 7SI, 8, 9, 9F and Belt and direct drive configurations See Catalogue M370 for more information. BCSF Backward Curved High Pressure Composite Fans 49 mm to 524 mm impeller diameters Airflow to 70 m 3 /sec Static pressure to 8450 Pa Airstream temperature to 93 C Arrangements, 8, 9, 9F and Belt and direct drive configurations 43

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