Defining Innovation. backward curved pressure blowers. Twin City Bulletin 1450

Transcription

1 Defining Innovation. backward curved pressure blowers TYPE BN 1 BUETIN 145-A May 211

2 BN Pressure Blowers The BN is a lower volume, higher pressure fan which utilizes a high efficiency, backward curved, non-overloading blade design. The BN offers a lower specific speed design featuring single thickness blades, suitable for industrial processes involving clean as well as light particulate-laden air. Ruggedness of construction, reliability of operation, and stable air performance are the hallmarks of the BN design. Typical Applications ombustion air Pressure and vacuum drying Product cooling Primary air supply to ejectors iquid agitation Glass blowing and cooling Water blow-off Air pollution control systems Exhausting Pneumatic conveying Gas boosting hoice of Wheels Twin ity Fan offers two wheel designs. Fans designated as sizes 27,, 33, etc. feature a narrower wheel for lower volumes with mechanical efficiencies to 8%. Fans designated as sizes 27W, W, 33W, etc. feature a wheel with slightly wider blades, a different blade profile and different blade count for relatively higher volumes while boosting mechanical efficiencies to 84%. Both wheels fit in a common BN housing. Arrangement 4 shown with optional rectangular evasé apabilities Available in arrangements 1, 4 and 8 Airstream temperatures to 8 F Wheel diameters from 27" to 73" Design Speeds to 18 RPM Sizes 27 to 73 Sizes 27W to 73W Static pressures to 65" w.g. apacities to 75, FM Design Speeds to 36 RPM Sizes 27 to 42 Sizes 27W to 42W Static pressures to 1" w.g. apacities to 35, FM Arrangement 8 shown with optional pie-shaped split housing 24 Twin ity Fan ompanies, td. All rights reserved throughout the world. Bulletin illustrations cover the general appearance of Twin ity 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. 2

3 Performance omparison Type BN fans are designed to maximize efficiency and offer non-overloading horsepower characteristics. This is illustrated by the following chart which compares both wheel designs with other manufacturers. Note that the "W" series of BN sizes allows the use of a one size smaller fan in many cases. OV NON- FM SP MANUFATURER SIZE / DIA. RPM BP (FPM) OVEROADING TF-BN-W W / 3" YES TF-BN 33 / 33" YES 9, 61.4" MFGR. A 28.75" NO - RADIA MFGR. B 29.5" NO - RADIA TF-BN-W 6W / 6" YES 35, 54" TF-BN 66 / 66" YES MFGR. A 54" NO - RADIA onstruction Features Standard onstruction All welded heavy gauge housing with structural reinforcements to reduce vibration and minimize distortion due to pressure. eavy gauge, continuous welded, backward curved, steel wheel with anti-thrust vanes. Shaft seal. Non-asbestos woven fibrous material sandwiched between the fan housing and an aluminum cover plate. Does not make the fan gas tight. onsult the factory for other available shaft seal options. Standard construction to F Stepped shaft with thrust cap for larger arrangement 1 and 8 fans. Anti-friction bearings with a minimum average bearing life (AFBMA -5) of 2, hours for long, reliable performance. Flanged inlet and outlet. Punched to TF&B standard pattern. Taper lock hub on most wheels. Statically and dynamically balanced rotor. Variation in wheel diameter (95% to 15%) to match specified performance. Optional onstruction igh Temperature onstruction Available on Arrangement 1 and 8 only. 31 F to 5 F onsists of high temperature grease, expansion and non-expansion bearings, shaft seal and shaft cooler. 51 F to 6 F onsists of the modifications above plus high temperature aluminum paint. 61 F to 8 F onsists of the modifications above plus an insulation blanket sandwiched between the fan housing and the pedestal to reduce heat conduction. May require pedestal modification. Backward urved BN Wheel Spark Resistant onstruction AMA type B or. Type B is limited to 25 F. Type construction is available to 8 F. Split ousing Fan sizes 365 and larger are available with horizontal or pie-shaped split housing construction. Special Materials and oatings onstruction materials include aluminum, stainless steel, astelloy and other alloys. Special coatings of various types are available. ontact the factory for details. 3

4 Accessories Evasé (Rectangular or Round) Available in either rectangular or round discharge. The evasé is usually fabricated by the customer as a part of the ductwork. The fan outlet must be expanded to equal the evasé area shown in the catalog to obtain the rated performance. onstruction is the same gauge as the fan housing when purchased from the factory. Inlet Bell For installations with an open inlet, an inlet bell (venturi) is required to achieve the catalog performance. The inlet bell is provided with a screen. E F (K) "" DIA. OES EQUAY SPAED ON "M" DIA. BOT IRE N STD. DIM. B STD. DIM. G FAN DIS. D A DIS. EVASÉ DIS. "" I.D. INET "J" O.D. FANGE ANGE F (See Page 14) Optional Rectangular Evasé Optional Round Evasé Optional Inlet Bell Evasé Dimensions SIZE A B D E F G J K M N EVASÉ WT. RET. ROUND Dimensions are in inches except where noted. Dimensions are not to be used for construction. B16127 ousing Drain with Optional Plug 3/4" IPS coupling welded to the lowest point in the fan housing. Variable Inlet Vanes Variable inlet vanes provide economical, stable, and efficient air volume control for manual or motorized operation. External type (bolt on) inlet vanes designed for F standard construction and 6 F optional construction. ontact the factory for elevated temperature applications or for applications involving fumes, moisture and particulate. Outlet Damper Double surface airfoil design blade with enclosed damper rods and flange mounted ball bearings. Dampers with multi blades feature opposed blades as standard. Additional Accessories Access door bolted or raised Inlet box Insulation pins Unitary and isolation bases OSA belt guard Shaft guard oupling, coupling guard and mounting 4

5 Engineering Data Derating Factors For igh Temperature When elevated temperatures are encountered, maximum RPMs allowable as shown in Table 4 must be derated according to Table 1. Standard steel construction is suitable for use in gas temperatures up to 8 F. Aluminum wheels are suitable for temperatures up to 25 F only. Table 1. igh Temperature Derating Factors TEMP. ( F) DERATING FATOR STD STEE STAINESS STAINESS ONSUT ONSUT 5.9 FATORY FATORY igh Temperature onstruction Requirements The BN product line is perfectly suited for high temperature airstream applications. Table 2 refers to fans of carbon steel construction. When aluminum (spark resistant) or stainless steel construction is required, additional fan modifications may be required. ontact the factory in these cases. Arrangement 4 is limited to 18 F. Table 2. igh Temperature onstruction Requirements TEMP. RANGE ( F) 22 to 18 F 31 to 5 51 to 6 61 to 8 BEARING TYPE Ball or Roller Grease OTER REQUIREMENTS Standard Fan UBRI- ATION AVAIABE ARRANGE- MENTS 1, 8 Arr. 4 to Shaft ooler, Shaft Seal Ball or igh Temp Expansion & Non-Expansion 1, 8 Roller Grease Bearings Same as 31 to 5 With Ball or igh Temp Addition of igh Temp 1, 8 Roller Grease Aluminum Paint Same as 51 to 6 With Ball or igh Temp Modification of Bearing Pedestal, 1, 8 Roller Grease Insulation Blanket Between ousing and Pedestal Air Density Factors For Temperature & Altitude The performance tables in this catalog are based on fans handling standard air at a density of.75 pounds per cubic foot. This is equivalent to air at 7 F at sea level (29.92 g barometric pressure). Thus, when specified performance is at a density different than standard, it must be converted to the equivalent standard conditions before entering the performance tables. The equivalent standard conditions can be calculated by using the Temperature and Altitude Density Ratios from Table 3, below. Table 3. Temperature and Altitude Density Ratios ATITUDE IN FEET ABOVE SEA EVE AIR TEMP. BAROMETRI PRESSURE IN INES OF MERURY ( F)

6 Engineering Data Table 4. Maximum RPMs, Wheel Weights and WR 2 MAX. RPM WEE WEIGT WR 2 FAN DESIGN (BS.) (B-FT 2 ) SIZE ARR. 1 ARR. 4 ARR. 8 STD. SIZES "W" SIZES STD. SIZES "W" SIZES Table 5. Material Specifications FAN WEE OUSING SAFT DIA. BEARING ODE* DESIGN SIZE DIA. SIDES SRO ARR. 1 ARR. 8 ARR. 1 ARR DB DB RB DB DB DB RB SR RB DB RB SB RB DB SRB SB RB DB SRB SB RB DB RB DB RB RB SRB SRB SRB SRB SRB SRB *Due to speeds and load ratings, bearing substitution is not permitted. BEARING ODES: DB = eavy Duty Ball such as Dodge SMA or Sealmaster MP Series RB = Roller Bearing such as Dodge S2 or SKF SYR Series SRB = Split Roller Bearing such as SKF SAF225 or inkbelt PB68 Series SB = igh Speed Ball Bearing Table 6. Minimum and Maximum Motor Frame Sizes FAN SIZE MOTOR FRAME SIZE IMITS DESIGN ARR. 4 ARR. 8 MIN. MAX. MIN. MAX. 182T 215T 182T 215T 284TS 365TS 284TS 365TS 182T 256T 182T 256T 284TS 45TS 284TS 45TS 213T 286T 213T 286T 364TS 445TS 364TS 445TS 254T 326T 254T 326T 364TS 449TS 364TS 449TS 284T 365T 284T 365T 44TS 449TS T 45T 324T 45T T 445T 364T 445T T 449T 44T 449T 6 444T 449T T 449T T 449T Table 7. Bare Fan Weights FAN SIZE DESIGN BARE FAN WEIGTS (BS.) ARR. 1 ARR. 4 ARR

7 Performance Data Design BN 18 RPM (Sizes 27 42, 27W 42W) W 5 BP STATI PRESSURE (IN. W.G.) W 33 2 W 1 27W FM W W 33W 365W 42W W Performance shown includes the effects of an outlet evasé. Selection Marked: Size 42, 1% Diameter FM: 75 SP: 23 BP: STATI PRESSURE (IN. W.G.) BP FM Variation in wheel diameter (95 to 15%) is available to match specified performance. See the Twin ity Fan Selector Program for assistance in selecting fans with variations in wheel diameter. 7

8 Performance Data Design BN 18 RPM (Sizes , 445W 6W) 5 5 BP STATI PRESSURE (IN. W.G.) 4 4 6W 542W W W FM W 49W 542W 6W Performance shown includes the effects of an outlet evasé STATI PRESSURE (IN. W.G.) BP FM Variation in wheel diameter (95 to 15%) is available to match specified performance. See the Twin ity Fan Selector Program for assistance in selecting fans with variations in wheel diameter. 8

9 Performance Data Design BN 12/15 RPM (Size 73, 73W) 5 5 BP STATI PRESSURE (IN. W.G.) RPM RPM 73W 4 12 RPM FM 73 15RPM RPM 73W 12 RPM Performance shown includes the effects of an outlet evasé STATI PRESSURE (IN. W.G.) BP FM Variation in wheel diameter (95 to 15%) is available to match specified performance. See the Twin ity Fan Selector Program for assistance in selecting fans with variations in wheel diameter. 9

10 Performance Data Design BN 36 RPM (Sizes 27 42, 27W 42W) STATI PRESSURE (IN. W.G.) BP W 365 W W FM W W 33W 365W 42W 42W 365W Performance shown includes the effects of an outlet evasé STATI PRESSURE (IN. W.G.) BP FM Variation in wheel diameter (95 to 15%) is available to match specified performance. See the Twin ity Fan Selector Program for assistance in selecting fans with variations in wheel diameter. 1

11 Dimensional Data Arr. 1 E A P NOTE 1 JA M M 8 B DIA. BASE OES Q GA GA. SIDES G G DIS Q BA BASE ANGES D K SE SD DIA. SAFT DX DIS. FANGE KS KWY. SIZE GB GA. SRO OKWISE ROTATION, TOP ORIZONTA DISARGE 'W TD' B A OUTSIDE OUSING O.D. I.D. FANGE FANGE N KA KB FAN SG FAN SAFT FOUNDATION PAN NOTES: 1. Punched outlet flanges per A1615 & punched inlet flanges per A1614 are included on all discharges. See page 4 for dimensions. 2. 'W' rotation is shown. 'W' rotation is similar but opposite. 3. Optional accessories: rectangular evase, rectangular to round evase & inlet bell per B See page 4 and 14 for dimensions. F B G D A E B F D U A T B G S R DB DE DD DG* DF W TAD W UBD W TAU W BD W BAU SIZE A B BA B DB D DD DE DF DG DX G GA GB G DES. DES. A B D E F x x x x x x x x x x x SIZE G Q R S T U JA KA KB K KS P SD SE M N Q DES. DES. DES. DES. DES. DES. DES. DES. DES. DES x.19.5 x x x x x x x x x x x x x x x DIMENSIONS ARE SUBJET TO ANGE. ERTIFIED DRAWINGS AVAIABE UPON REQUEST. B1676 B1679B 11

12 Dimensional Data Arr. 4 E A P (MAX.) NOTE 1 JA KA M FAN SG M 8 B DIA. BASE OES Q DIS DX DIS. FANGE B A OUTSIDE OUSING KB FAN SAFT Q O.D. FANGE I.D. FANGE FOUNDATION PAN GA GA. SIDES G G BA BASE ANGES OKWISE ROTATION, TOP ORIZONTA DISARGE 'W TD' D GB GA. SRO N NOTES: 1. Punched outlet flanges per A1615 & punched inlet flanges per A1614 are included on all discharges. See page 4 for dimensions. 2. 'W' rotation is shown. 'W' rotation is similar but opposite. 3. Optional accessories: rectangular evase, rectangular to round evase & inlet bell per B See page 4 and 14 for dimensions. F B G D A E B F D U A T B G S R DB DE DD DG* DF W TAD W UBD W TAU W BD W BAU FR SIZE A B BA B DB D DD DE DF DG DX DES. DES. G GA GB G MIN. MAX. MIN. MAX. DES. DES x T 215T 284TS 365TS x T 256T 284TS 45TS x T 286T 364TS 445TS x T 326T 364TS 449TS x T 365T x T 45T x T 445T x T 449T SIZE A B D E F G Q R S T U JA KA P KB M N DES. DES. DES. DES. Q DIMENSIONS ARE SUBJET TO ANGE. ERTIFIED DRAWINGS AVAIABE UPON REQUEST. B1677A B168A 12

13 Dimensional Data Arr. 8 Q E A DIS M (MAX.).5 SAFT GAP NOTE 4 P NOTE 1 DX DIS. FANGE JA B OUTSIDE A OUSING KA KB M FAN SG FAN SAFT M 18 B DIA. BASE OES Q SD DIA. SAFT K SE KS KWY. SIZE I.D. FANGE O.D. FANGE 7 D GA GA. SIDES BA BASE ANGES GB GA. SRO G G OKWISE ROTATION, TOP ORIZONTA DISARGE 'W TD' D F B U A G T N FOUNDATION PAN NOTES: 1. Punched outlet flanges per A1615 & punched inlet flanges per A1614 are included on all discharges. See page 4 for dimensions. 2. 'W' rotation is shown. 'W' rotation is similar but opposite. 3. Optional accessories: rectangular evase, rectangular to round evase & inlet bell per B See page 4 and 14 for dimensions. DB DE SIZE A B BA B DB D B DD D W TAU W TAD G A W BD E S DG* W UBD B F W BAU R DF x x x x x x x x x x x SIZE DD DE DF DG DX FR DES. DES. G GA GB G DES. DES. A B D E F G Q R T 365TS T 45TS T 445TS T 449TS T 449TS T T T T T T SIZE S T U JA KA KB K KS M P SD SE M N Q DES. DES. DES. DES. DES. DES. DES. DES. DES. DES. DES. DES x.19.5 x x.19.5 x x x x x x x x x x x x x DIMENSIONS ARE SUBJET TO ANGE. ERTIFIED DRAWINGS AVAIABE UPON REQUEST. B1678 B1681B 13

14 Dimensional Data Flanges O.D. Inlet Flange I.D. A B.. B SIZE A B D E ANGE SIZE x x x x x x x x x x x 2. A1614 (D) E DIA. OES EQUAY SPAED B (D) E DIA. OES Outlet Flange J K J A SIZE A B D E F G J K ANGE x x x x x x x x x x x 2.5 SIZE A1615 F G S F G J = K Optional Rectangular Evasé Flange (For optional round evasé dimensions see page 4) A E 4. = F SIZE A B D E F G J K M ANGE x x x x x x x x x x x 2.5 SIZE A16121B () M DIA. OES B D DIMENSIONS ARE SUBJET TO ANGE. ERTIFIED DRAWINGS AVAIABE UPON REQUEST. 14

15 Typical Specifications Furnish and install as shown on the plans, Type BN high efficiency industrial fans with backward curved, non-overloading blade design and of the arrangement indicated, as manufactured by Twin ity Fan & Blower, Minneapolis, Minnesota. OUSING Fan housings shall be of heavy gauge steel with continuously welded construction and braced with structural reinforcements to eliminate any resonant vibration and provide smooth operation. ousings with partially welded construction are not acceptable. Flanged inlets and outlets shall be provided as standard equipment for rigidity and duct connection. WEE Blade design shall be backward curved for high efficiency and have non-overloading performance characteristics. Blades shall be die-formed of special alloy steel material for strength and accuracy of contour, and continuously welded to the wheel inlet cone and backplate. Partial welding of blades will not be acceptable. A conical fabricated steel (not cast iron) hub shall be provided. Wheels shall be statically and dynamically balanced on precision electronic machines as well as trim balanced after complete assembly. SAFTS Shafts are to be solid material selected for AISI 14 or 145 hot rolled steel, accurately turned, ground, polished, and ring-gauged for accuracy. Shafts are to be sized for the first critical speed of at least 1.43 times the maximum speed for the class. BEARINGS Bearings are to be heavy duty, grease lubricated, anti-friction ball or roller, self-aligning, pillow block type and selected for minimum average bearing life (AFBMA -5) in excess of 2, hours at the maximum fan RPM. Factory Test Run Units All fans up to 2 P shall be completely assembled and test run as a unit at operating speed at the factory. The fans are to be balanced and records maintained of the readings in the axial, vertical, and horizontal direction on each of the bearings. A written copy of this record shall be available upon request by the customer. Fans larger than 2 P shall be assembled at the factory and should be field checked for vibration by the customer. FINIS AND OATINGS The entire fan assembly, excluding the shaft, shall be thoroughly degreased and deburred before application of a rust-preventative blue primer. After the fan is completely assembled, a top coat of blue primer is applied to the entire unit. The fan shaft is coated with a petroleum-based rust protectant. The fan shall be coated with the following optional finish: TF Blue Extra oat Zinc Straight Epoxy igh Temperature Aluminum Epoxy Phenolic Epoxy Asphaltum Synthetic Resin Baked Phenolic Vinyl (PV) Air Dry Phenolic oal Tar Epoxy Enamel Special olor Group Vinyl igh Build Baked Epoxy AESSORIES Where required the fans shall be provided with: Bolted Access Door oupling Guard Raised Access Door orizontal Split ousing Drain Pie-Shaped ousing Plug Special Diameter onstruction Flanged & Punched Inlet/Outlet Inlet Bell With Screen Inlet/Outlet ompanion Flange Stainless Steel Nameplate OSA Belt Guard Evasé Shaft Guard Spark Resistant onstruction Outlet Damper igh Temperature onstruction Inlet Screen Shaft Seal Variable Inlet Vanes External Type Insulation Pins oupling Unitary & Isolation Bases Special oatings SUBMITTAS Submittals for approval of equipment shall include copies of outline drawings and pressurevolume performance curves showing point of operation. 15

16 Industrial & ommercial Fans entrifugal Fans Utility Sets Plenum & Plug Fans Inline entrifugal Fans Mixed Flow Fans Tubeaxial & Vaneaxial Fans Propeller Wall Fans Propeller Roof Ventilators entrifugal Roof & Wall Exhausters eiling Ventilators Gravity Ventilators Duct Blowers Radial Bladed Fans Radial Tip Fans igh Efficiency Industrial Fans Pressure Blowers aboratory Exhaust Fans Filtered Supply Fans Mancoolers Fiberglass Fans ustom Fans A Twin ity Fan ompany Twin city fan & blower Trenton ane N Minneapolis, MN Phone: Fax: MWG12/1