Blower Silencers UNIVERSAL. Blower Silencers ENERGY ENVIRONMENTAL

Transcription

1 UIVERSAL EERG EVIROMETAL

2 . Rotary ositive General Information In a closed blower discharge system, structure-borne noisesuch as that radiated by pipe wall and silencer shellmay be a consideration, particularly where a stringent, close-proximity noise specification applies. For these applications, various means are available to treat the pipe and shell radiated noise, such that most reasonable specifications may be met. For instance, it is possible to lag the silencer shell externally and reduce any shell noise contribution to below the casing and mechanical noise of the blower and driving machinery. B&W Universal invites your inquiries concerning special applications where EA, OSHA or other noise specifications apply. Special applications are handled on an individual basis and recommendations are made according to specific requirements of the installation. Rotary ositive Blowers The Rotary ositive Blower is a two impeller compressor that delivers a large quantity of gas or air relative to the individual pulses. Blower capacities are expressed in CFM at inlet conditions (ICFM). Blower size is usually expressed as gear diameter by rotor length. itch Line Velocity (LV) is the peripheral velocity of the timing gearequal to the product of the gear circumference and the rotative speed of the blower, usually expressed in feet per minute (FM). The blower presents two problems: ) pulsation within the piping system and, ) noise radiation in the vicinity of the blower and piping. The importance of these relative to each other is a function of blower size and speed; both increase proportionately to the blower size and the square of the speed. ulsation is more pronounced on the discharge side. eak pulse pressures are quite severe and can result in unsilenced discharge sound power levels up to db. The inlet, although producing less severe pulsation and noise, receives equal attention since the inlet is usually open to atmosphere and the noise much more apparent. Silencers There is little question that silencers are a necessity on any blower installation. Regardless of the size or speed of the blower, silencers of some type are nearly always used. In the selection of blower silencers, there are two basic considerations: ) the silencer must be the correct size (i.e., sufficient capacity for the volume flow) and, ) the silencer must be the proper type for the application. The nominal silencer size need only be based on the gas volume, (i.e., the CFM of the gas or air at the operating conditions). However, the silencer (design) must be selected with consideration of the blower size and operating speed. Complete application and capacity information is given on page.. There are two types of silencers commonly used on positive blowers: a reactive type silencer which consists of a series of expansion chambers having interconnecting tubes, a more sophisticated silencer design. is the combination chamber-absorptive type. This combination silencer is similar to the reactive type with the exception that an acoustically-packed, sound absorbing section is included, comprising an extension of the silencer connection closest to the blower. The inlet of a discharge silencer and the outlet of an inlet silencer are the ends having the packed section. A third basic type of silencerthe simple, straight-through packed typeis occasionally used on blowers. This type of silencer is usually used on small, high speed machines which characteristically produce significant high frequency noise and relatively mild pulsations. The LV is normally the criterion for silencer type selection. If the blower is operating in the critical LV range, it will generate objectionable high frequency noise which may cause shell ring or tank hammer in the piping and silencer. These critical LV conditions will always require a combination chamber-absorptive silencer for satisfactory results. Inlet Silencers For inlet service, a LV of, ft/min or greater is considered critical. This transition speed is empirically established and is somewhat arbitrary, however, it is commonly accepted that blowers operating at or above, ft/min are considered critical for the purpose of inlet silencer application. Those operating below, ft/min are considered subcritical. Subcritical LV applications can usually be silenced adequately with a chambertype silencer, such as B&W Universal URB or UCI Series. Blowers operating above the critical LV of, ft/min will invariably require the RIS Series combination chamberabsorptive type silencer. Inlet Filters or Filter Silencers are commonly used on blower inlets, either individually or in series with a separate inlet silencer. lease reference the Filters and Filter Silencers section of this catalog for further information. ischarge Silencers For the more severe discharge conditions of typical blower installations, a LV of, ft/min is accepted as the critical transition speed. Blowers operating below, ft/min are considered subcritical and can usually be adequately silenced on the discharge side by use of a chamber-type silencer UC or UR Series. Machines operating above the ft/min transition speed will require combination chamberabsorptive silencers such as S or R Series. In some larger blower installations, piping requirements or space restrictions may preclude the use of a large, single discharge silencer such as the S or R Series. Where two or more blowers discharge into a common header, individual silencers upstream of the header are required to subdue the individual blower pulsations. Otherwise, the pulsations tend to beat with each other and can be extremely objectionable. ote: Silencers should be mounted as close to the blower as possible since any piping between the blower and silencer will radiate noise. Standard silencer connections are not designed to carry external piping or valve loads, so good piping support practices should be used to prevent stresses that cause fatigue and eventual fracture of the silencer or piping. It is also good practice to isolate the blower from the silencer with a flexible expansion joint. Contact B&W Universal for special design considerations where loading is a factor. Attenuation Curves oise attenuation curves are given for the various models within this section. The curves represent insertion loss of airborne noise for typical applications under average conditions. It is not feasible to chart the expected performance of a silencer over a wide range of applications and conditions, therefore, the curves must be used with discretion. Structure-borne noise (see above) may be a consideration and will require separate analysis, since it is not airborne noise and not used for silencer performance rating.

3 The silencers shown below are more fully described on the individual catalog pages. These units are designed specifically for use on Rotary ositive Blowers. There are fundamental similarities between blower silencers and other types, particularly reciprocating engine silencers, which also require a silencer design that provides effective pulse control as well as noise attenuation. However, blower silencers generally must be constructed more ruggedly to withstand prolonged exposure to severe pulsations produced by the blower. All silencers described are of standard with end in, end-out design. Low or high side inlet and outlet connections are available and are described on the individual catalog pages. General Information Rotary ositive Blowers.. Rotary Blower ositive Silencers UCI Series Inlet Silencer Chamber-type inlet silencer for use on subcritical LV applications. Available in pipe sizes " ". Smaller sizes use URB Series. Available with side connections and mounting brackets. RIS Series Inlet Silencer Combustion chamber-absorptive type inlet silencer for critical LV applications. Available in pipe sizes " ". Low or high side outlet and mounting brackets available on most sizes. UC Series URB/UR Series ischarge Silencers Chamber-type discharge silencer for use on sub-critical LV applications. Available in pipe sizes " ". (Smaller sizes use URB Series). Low, high, or opposed side connections and mounting brackets available. S Series R Series ischarge Silencers Combination chamber-absorptive type discharge silencers for critical LV applications. Available in pipe sizes " ". Low, high, or opposed side connections and mounting brackets available on most sizes. Accessories, Special Features Mounting Brackets Inspection Openings ressure Vessel Construction Oversize Flanges Special Finishes Special Materials

4 . Rotary ositive Application, Capacity, ressure rop ata Blower Transition Speed Blower Transition Speed-RM Gear Size Inlet ischarge ¹ ₂,,,,,,,,,,,,,,,,,,, Silencer Recommendations As mentioned on page. pitch line velocity (LV) is the speed of the timing gear in feet per minute (ft/min). For purposes of silencer application. LV is considered critical at, ft/min for intake and, ft/min for discharge. Table gives transition speeds in RM. Blowers running at these speeds or greater will have critical LV. Operating speeds below transition will be in the sub-critical range. Blowers operating in the sub-critical speed range usually require only simple chambertype silencers while those in the critical range require combination chamber-absorptive type silencers. If there is doubt, it is best to use the combination-type silencers. When gear size and operating speeds are known, the proper type silencer is easily selected. Silencer Size Selection, Capacity Table gives the nominal capacity of the various size silencers. Size in this table refers to the silencer nominal size, or its inlet size. Capacities are expressed in inlet CFM (ICFM), thus, discharge silencers are rated at higher capacities than inlet silencers since the air is compressed to reduced volume at the discharge operating pressure. A B From Table determine whether blower RM is above or below the transition speed for critical LV. Consult Table for recommended silencer models. ressure rop The following formulas may be used to calculate pressure drop through the silencers covered in this catalog. = V Inlet: c (assumes silencer inlet is open to atmosphere) V ischarge:. c T = pressure drop through silencer, inches of water V =air velocity through silencer, ft/min* c =individual silencer restriction coefficientempirical constant (see Table ) = discharge pressure, SIA (operating pressure in SIG +.) T = discharge temperature, R absolute (operating temperature in F + ) * To calculate velocity through silencer, divide flow in ACFM by cross-sectional area of silencer inlet diameter in square feet. Silencer Model Specifications itch Line Velocity Below Transition Above Transition Inlet Silencer UCI, URB RIS ischarge Silencer URB, UC, UR S, R ressure rop Coefficients Model URB, URB UCI, UCI, UCIH RIS, RIS, RISH UC, UC UR, UR, URH S, S, SH R, R, RH RS, SS, URS ressure rop Coefficient (C) Size ¹ ₂ ¹ ₂ Est Temp. Silencer Capacity Inlet Silencer,,,,,,,,,,,,, F SIG,,,,,,,,,,,,, F Capacity (Inlet CFM. SIA at F) ischarge Silencer SIG SIG SIG SIG,,,,,,,,,,,,, F,,,,,,,,,,,,, F,,,,,,,,,,,,,, F,,,,,,,,,,,,,, F

5 Typical Attenuation Curve.. Specifications UCI Group Chamber Type Inlet Silencer Rotary Blower ositive Silencers The UCI Series Inlet Silencer is a heavy duty, all welded unit offering standard attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The UCI Series is designed for pulse control and silencing for most subcritical LV applications. UCI Series Silencers are designed for either vertical or horizontal mounting. esigns will allow for low or high side outlets for mounting flexibility. Low side outlet versions are designated as UCI and the high side outlet versions are designated as UCIH. UCI Series (Low Side Outlet) Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available. Silencers with connection sizes of and above are equipped with / ASI rilled late Flanges. UCIH Series (High Side Outlet) L H Chamber Type Inlet Silencers (Size) ¹ ₂ ¹ ₂ art umber --AA --AA --AA --AA rain L H ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ Min Sizes " " Use URB Series (page.) ¹ ₂ UCI Max Min UCIH Max Weight ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ For silencer sizes and below, use the URB Series. For silencer inlet sizes above please contact B&W Universal for price and availability. ote: imensions and weights are nominal and may vary slightly with production models. Request certified drawings of specific models for exact dimensions.

6 . Typical Attenuation Curve Rotary ositive Specifications RIS Group Combination Chamber- Absorptive Type Inlet Silencer The RIS Series Inlet Silencer is a heavy-duty, all-welded unit offering premium attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The RIS Series is designed for pulse control and silencing for most Critical LV Applications. RIS Series Silencers are designed for either vertical or horizontal mounting. A low side outlet version is designated RIS Series. Both the RIS and RIS Series Silencers have the same performance characteristics. RIS Series (Low Side Outlet) Silencers with connection sizes of -/ and smaller are offered with Male T Threaded connections. Silencer with connection sizes of and are available with either T male threads, or flanges. Silencer connections of and above are equipped with / ASI rilled late Flanges. Exterior surfaces are coated with a rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available. L H Combination Chamber-Absorptive Type Inlet Silencers (Size) ¹ ₂ ¹ ₂ art umber --AA --AA --AA --AA --AA* --AA* --AA --AA --AA --AA --AA --AA L H ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ RIS ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ RISH Sizes " " use U Series (page.) ¹ ₂ ¹ ₂ ¹ ₂ E ¹ ₄ ³ ₄ ¹ ₄ ¹ ₂ Min FIXE AT FIXE AT FIXE AT FIXE AT ¹ ₂ RIS Max ¹ ₂ ¹ ₂ Weight, For inlet sizes below please refer to the U Series. For connection sizes above please contact B&W Universal for price and availability. ote: imensions and weights are nominal and may vary slightly with production models. Request certified drawings of specific models for exact dimensions. *Specify -TT for male pipe threaded units.

7 Typical Attenuation Curve.. Specifications UC Group Chamber Type ischarge Silencer Rotary Blower ositive Silencers The UC Series ischarge Silencer is a heavy duty, all welded unit offering standard attenuation. Silencers are constructed of carbon steel, providing long service life. The UC Series is designed for pulse control and silencing for most Sub Critical LV Applications. For remium Grade Silencing, please refer to the UR Series. The UC Series is the basic End-in, End-out configuration. A low side inlet version is offered as the UC Series. Silencers are designed for either vertical or horizontal mounting. Silencers with connection sizes of and above are equipped with / ASI drilled plate flanges. UC Series UC Series (Low Side Inlet) Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Additional coating options are available upon request. Brackets and other mounting options are also available. L H Chamber Type ischarge Silencers (Size) art umber rain L H Min Max Weight ¹ ₂ ¹ ₂ Sizes " " use URB Series (page.) --AA --AA --AA --AA ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ For connection sizes below please refer to the URB Series. For connection sizes above please contact B&W Universal for price and availability. ote: imensions and weights are nominal and may vary slightly with production models. Request certified drawings of specific models for exact dimensions.

8 . Rotary ositive Specifications URB Group UR Group Chamber Type ischarge Silencer Typical Attenuation Curve ote: Connection sizes of are designated as URB Series. Sizes and larger are designated as UR Series. Both the URB and UR Series are fundamentally the same in design and the performance characteristics are identical. The URB/UR Series ischarge Silencer is a heavy duty, all welded unit offering premium attenuation. Silencers are constructed of carbon steel, providing long service life. The URB/ UR Series is designed for pulse control and silencing for most subcritical LV applications. URB, UR Series The URB/UR Series is the basic endin, end-out configuration. A low side inlet (URB/UR), high side inlet (URH), and opposed connections (URS) versions are available providing added mounting and piping flexibility. Silencers are designed for either vertical or horizontal mounting. Silencers with connection sizes of and above are equipped with / ASI drilled plate flanges. URB, UR Series (Low Side Inlet) URH Series (High Side Inlet) Connection sizes of -/ and smaller are offered with male T pipe threads. Connection sizes of and are available with either male T thread or / ASI drilled plate flanges. Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available. URS Series (Opposed Connections) L H Chamber Type ischarge Silencers (Size) ¹ ₂ ¹ ₂ art umber --AA --AA --AA --AA --AA --AA --AA* --AA* --AA --AA --AA --AA --AA L H ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ URB, UR URH URS Min Max Min Max Min Max FIXE AT FIXE AT FIXE AT FIXE AT ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ Weight, For connection sizes above please contact B&W Universal for price and availability. ote: imensions and weights are nominal and may vary slightly with production models. Request certified drawings of specific models for exact dimensions. *Specify -TT for male pipe threaded units.

9 Typical Attenuation Curve.. Acoustical packing is suitable for F Specifications S Group Combination Chamber- Absorptive Type ischarge Silencer Rotary Blower ositive Silencers The S Series ischarge Silencer is a heavy duty, all welded unit offering standard attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The S Series is designed for pulse control and silencing for most critical LV applications. For the most demanding pulse applications, the R group of silencers may be required. Silencers are designed for either vertical or horizontal mounting. esigns will allow for low or high side inlets for mounting flexibility. A low side inlet version is designated S Series. The high side inlet configuration is designated as SH Series. The opposed connection version is designated as the SS Series. All versions have the identical performance characteristics. Silencers with connection sizes of to -/ are offered with male T threaded connections. Silencers with connection sizes of and are available with either T male threads, or drilled plate flanges. Silencer connections of and above are offered with / ASI drilled plate flanges. Exterior surfaces are coated with a rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available. S Series S Series (Low Side Inlet) SH Series (High Side Inlet) SS Series (Opposed Connection) E L H rain Combination Chamber-Absorptive Type ischarge Silencers B (Size) ¹ ₂ ¹ ₂ art umber --AA --AA --AA --AA --AA* --AA* --AA --AA --AA --AA --AA L ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ H ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ S SH SS Sizes " and " use URB Series (page.) ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ B ¹ ₂ E ¹ ₄ ³ ₄ ¹ ₄ ¹ ₂ Min Max S Min Max ¹ ₂ ¹ ₂ ¹ ₂ Min Max SS Min Max ¹ ₂ ¹ ₂ ¹ ₂ Min Max SH Min Max ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ Weight For silencers with connection sizes from through use the URB Series. For silencers with connections larger than please contact B&W Universal for price and availability. ote: imensions and weights are nominal and may vary slightly with production models. Request certified drawings of specific models for exact dimensions. *Specify -TT for male pipe threaded units.

10 . Typical Attenuation Curve Rotary ositive Specifications R Group Combination Chamber- Absorptive Type ischarge Silencer Acoustical packing is suitable for F The R Series ischarge Silencer is a heavy duty, all welded unit offering premium attenuation. Silencers are constructed of carbon steel, designed to provide long service life. The R Series is designed for maximum pulse control and silencing for the most demanding Critical LV Applications. Silencers are designed for either vertical or horizontal mounting. esigns will allow for low or high side inlets for mounting flexibility. A low side inlet version is designated as R Series, and the high side inlet configuration is designated as RH Series. The opposed connection version is designated as the RS Series. All versions have identical performance characteristics. Silencers with connection sizes of -/ and smaller are offered with male T threaded connections. Silencers with connection sizes of and are available with either T male threads, or flanges. Silencer connections of and above are provided with / ASI rilled late Flanges. Exterior surfaces are coated with rust inhibitive primer, and may be finish coated in the field if required. Other coating options are available upon request. Brackets and other mounting options are also available. R Series R Series (Low Side Inlet) RH Series (High Side Inlet) RS Series (Opposed Connection) E L H rain Combination Chamber-Absorptive Type ischarge Silencers B (Size) ¹ ₂ ¹ ₂ art umber --AA --AA --AA --AA --AA* --AA* --AA --AA --AA --AA --AA L ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ H ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ R RH RS ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ B E ¹ ₂ ¹ ₂ R Min Max Sizes " " use URB Series (page.) or use U Series: (page.) FIXE AT FIXE AT FIXE AT FIXE AT ¹ ₂ ¹ ₂ RS Min Max ¹ ₂ RH Min Max ¹ ₂ ¹ ₂ ¹ ₂ Weight, For connection sizes below please refer to the URB Series Silencers. For connection sizes above please contact B&W Universal for price and availability. ote: imensions and weights are nominal and may vary slightly with production models. Request certified drawings of specific models for exact dimensions. *Specify -TT for male pipe threaded units.

11 Typical Attenuation Curve.. Specifications SURS Group Chamber Type Multi-Use Silencer Rotary Blower ositive Silencers SURS Series blower silencers are heavy duty, all welded steel construction, suitable for either inlet or discharge applications. The SURS series is designed for application to blowers operating above critical transition speed. As a result, there is no acoustical packing in these silencers. These silencers incorporate a unique high performance, three chamber system which utilizes a diffuser on the blower side of the silencer. The SURS Series provides excellent pulse control, and is designed for the most demanding conditions. Connection sizes smaller than " are provided with standard T male pipe nipples. Silencers with connection sizes of " and larger have / ASI drilled plate flanges. The SURS is a basic end-in, end-out configuration. A low side inlet version is available as the SURS Series. Both the SURS and SURS versions are similar in gas flow path offering identical performance. The SURS and SURS Series silencers come with a high heat aluminum paint system. Other paint systems are available upon request. SURS Series SURS Series (Low Side Inlet) L H rain Combination Chamber Type Multi-Use ischarge Silencers Model SURS- SURS-. SURS- SURS-. SURS- SURS- SURS- SURS- SURS- SURS- SURS- SURS SURS art Model art -A-SS -A-SS -A-SS -A-SS -A-SS* -A-SS* -A-SS -A-SS -A-SS -A-SS -A-SS SURS- SURS-. SURS- SURS-. SURS- SURS- SURS- SURS- SURS- SURS- SURS- -B-SS -B-SS -B-SS -B-SS -B-SS* -B-SS* -B-SS -B-SS -B-SS -B-SS -B-SS L H ¹ ₂ ¹ ₂ * * ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ Min. Max Weight ¹ ₂ ¹ ₂ ¹ ₂,, For silencer connections above " please contact B&W Universal for price and availability. *Specify -TT for male pipe threaded units.

12 . Rotary ositive Accessories and Optional Features UCI, RIS, IC IRB, IR, S, R, and SURS In addition to the standard accessories shown here, other special features such as special materials and finishes will be quoted on request. Contact B&W Universal with your specific requirements. Mounting Brackets Mounting Brackets or legs are available for any of the silencers in this section. Saddle type brackets for horizontal mount and angle legs for vertical mount are standard. See Spec. Sheet o.. Special design brackets will be quoted with your specifications. ressure Vessel Construction All silencers shown in this catalog may be fabricated in accordance with iv., Section VIIIASME Code for Unfired ressure Vessels. imensions are similar to standard models, but material types and thicknesses are selected to meet code requirements. rices are quoted on application to meet your pressure and temperature conditions. Horizontal Vertical Inspection Openings Inspection Openings with bolted and gasketed cover plates are available installed at the time the silencer is fabricated. They are designed to withstand the usual range of pressure encountered with blowers. One inspection opening is usually installed in each silencer chamber for cleaning or inspection. Standard sizes include: " ", " ", " ". Oversize Flanges Frequently the blower flange size is larger than the required silencer s connection. Rather than use a larger silencer, it is usually more economical to use an oversize reducing flange on the silencer. This is the conventional piping practice and may be used on either inlet or discharge silencers. Example: a " flange size silencer has adequate capacity for a blower with a " discharge flange. A flange having a drilling pattern to match the " blower flange but with a " bore to match the silencer nozzle is substituted on the silencer inlet. Two pipe sizes, (e.g. " to "), is the recommended maximum variation. rices on request.

13 Typical Attenuation Curve. CBF/CBFI Series Compact Blower Inlet Filter-Silencer Filter and silencer combined in one unit. The CBF and CBFI have the acoustic capabilities of the B&W Universal RIS Series silencers and the filtration performance of CC series filters. Reduced cost, overall package size, weight, storage space, freight cost and damage. Approximately one third the size of conventional blower silencer, with the added benefit of excellent, high-efficiency filtration. Reduced overall package noise without further acoustic treatment. VersatileSuitable for inlet applications in confined areas, outdoor or indoor, without compromising acoustic or pressure drop performance. CBF Series (outdoor use) W ¹ ₈" T pressure tap Removable weatherhood for filter element access L H ¹ ₈" T pressure tap L H CBFI Series (indoor use) W Removable plate for filter element access (nom.) ¹ ₂ aper -* -* Element art umber Felt -* -* *air of elements required (stacked). Wire -* -* F F F Models, imensions, Weights and Elements (nom.) ¹ ₂ CBF/CBFI H CFM CA art ¹ ₂ ¹ ₂ ¹ ₂ ³ ₄ ¹ ₄ ¹ ₂ ¹ ₂ ¹ ₂ ³ ₄ ³ ₄ ³ ₄ ¹ ₂,,,, --AA --AA --AA --AA --AA --AA --AA --AA --AA otes:. on-asme Code construction suitable for " Hg vacuum.. Weights are approximate and do no include the weight of the filter element. CBF W L Weight art ¹ ₄ ³ ₄ ¹ ₄ ¹ ₂ ¹ ₂ -G-AA -G-AA -G-AA -G-AA -G-AA -G-AA -G-AA -G-AA -G-AA CBFI B L Weight ¹ ₂ ¹ ₂ ³ ₄ ¹ ₄ ³ ₄ ¹ ₄ ¹ ₄ ¹ ₄ ³ ₄ ³ ₄

14 . CB Series Compact Blower Silencer The B&W Universal CB Series of compact blower silencers are smaller in size when compared to other more conventional styles of blower silencers. The CB Series is used when space is at a premium. These silencers are designed to provide intake or discharge silencing on rotary positive blowers. On average, the CB Series Silencers are about / the size of conventional silencers, providing savings in cost and weight. The CB Series silencers utilize an absorbent internal pack suitable for temperatures to F, and pressures up to psig. Flanged or threaded connections are available. Exterior surfaces receive a shop coat of corrosion inhibitive primer. L H Typical Attenuation Curve, inches of H O F F F ressure rop Curves..... Velocity, ft/min Compact Model CB- CB-¹ ₂ CB- CB- CB- CB- CB- CB- CB- art umber (nom.) L H Weight --AA --AA --AA --AA --AA --AA --AA --AA --AA ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ³ ₄ ¹ ₄ ¹ ₂ ¹ ₂ ¹ ₂ ³ ₄ ³ ₄ ³ ₄ ¹ ₂ CFM CA,,,,

15 These wide base plate products accommodate a variety of blower package designs. The UI-BASE package and the USI-BASE base plate use the same basic base plate and discharge silencer. The UI-BASE package includes the B&W Universal model URB high-side inlet silencer and CCF inlet air filter, while the UI-BASE base plate is only the basic plate and the URB discharge silencer. lease see page. for performance and sizing information for the URB series silencers, page. for information on the URB series silencers, and page. for performance data, weights and dimensions of CCF filters. UI-BASE Ultra-Wide Base lates/components Rotary ositive Blowers. UI-BASE ackage CCF (see page.) URB (see page.) URB (see page.) UI-BASE Base late Only URB (see page.) UI-BASE Base lates/components art umbers Size ¹ ₂ UI-BASE ackage Base late Only URB Only URB Only CCF Only --AB --AB --AB --AB --AB --AB --AA --AA --AA --AA --AA --AA --AA --AA --AA --AA --AA --AA -L-TT* -L-TT* -L-TT* -L-TT* -L-TT* -L-TT* *Specify at end of part number for unit with pleated paper elements, F for pleated felt or W for wire mesh. Refer to page. for filter element details.

16 . UI-BASE Ultra-Wide Base lates/components Rotary ositive Blowers imensions and Weights UI-BASE Base late (w/urb) (nom.) A B C C E FS ¹ ₂ ¹ ₂ ¹ ₂ ³ ₄ ¹ ₂ ¹ ₂ ³ ₄ ¹ ₄ ¹ ₄ ¹ ₄ ¹ ₂ ³ ₄ ¹ ₂ ³ ₄ ¹ ₂ ¹ ₄ ¹ ₄ ³ ₄ ¹ ₄ G H J L Q (ia.) S ¹ ₂ ¹ ₂ ³ ₄ ¹ ₄ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₄ ¹ ₂ ¹ ₂ ³ ₄ ¹ ₄ ³ ₄ ¹ ₂ ¹ ₂ Approx. Weight otes:. Sizes " " URB discharge silencers are shipped standard with male pipe threaded connections. " and " URB discharge silencers are shipped standard with male pipe threaded discharge connections and plain pipe blower connections. " URB discharge silencers are shipped standard with flanged discharge connection drilled to / lb. ASI specifications and plain pipe blower connections.. Sizes " " URB discharge silencers have a " T relief valve coupling and plug. Sizes " " URB discharge silencers have a " T relief valve coupling and plug.. UI-BASE base plate kit sizes " " require gussets. URB Silencers / (nom.) H Approx. Weight ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ ¹ ₂ otes:. Sizes " " URB inlet silencers are shipped with male pipe threaded inlets and plain pipe outlets. Sizes " and " URB inlet silencers are shipped standard with flanged inlet connections drilled to / lb ASI specifications and plain pipe outlets. CCF Silencers (please see page.)

17 Babcock & Wilcox Universal Highway - Stoughton, Wisconsin, U.S.A. hone: +.. UIVERSAL EERG EVIROMETAL The information contained herein is provided for general information purposes only and is not intended nor to be construed as a warranty, an offer, or any representation of contractual or other legal responsibility. B&W Universal is a subsidiary of The Babcock & Wilcox Company (B&W). Established in, B&W is a global leader in advanced energy and environmental technologies and services for the power, industrial and renewable markets, with operations, subsidiaries and joint ventures worldwide. Babcock & Wilcox Universal, Inc. All rights reserved. For more information or to contact us, visit our website at. E- J