Specifications

RFB Series
25 - 30 dBA
Critical Grade
800 387 7818
Engine Silencers
Silencer Selection
Call Silex for immediate assistance in
selecting the appropriate silencer that best
suits your application’s acoustical and
backpressure requirements or consult the
silencer selection guide in our catalogue. You
can also use Silex’s exclusive Silencer Sizing
and Selection Program “Silex Digital
Engineer” found on the Company’s secure
website at www.silex.com.
Application & Performance
Compact Critical Grade series silencers are
combination type silencers and are designed
specifically for enclosures and marine
applications where space is limited. Silencers
are manufactured from light to heavy gauge
steel and finished with high temperature black
paint. Standard slip-on inlet up to 6”. Flange
inlet from 8”- 12”. Flanges are ANSI 125/150#.
Standard tube outlet on all sizes.
Dimensions
Lit-0070 07-06
Silencers - Compact
RFB-6
Attenuation - dB
Octave Band Center Frequency - Hz
63 125 250 500 1K 2K 4K 8K
60
50
40
30
20
10
0
Typical Attenuation Curve
Metric dimensions rounded to nearest mm.
Dimensions and weights are nominal and may vary slightly in
production models.
Silex Innovations Inc.
Phone [phone]
Fax [phone]
www.silex.com
RFB-12
Attenuation - dB
Octave Band Center Frequency - Hz
63 125 250 500 1K 2K 4K 8K
60
50
40
30
20
10
0
A B C D E F G Wgt.
Model
In In (mm) In (mm) In (mm) In (mm) In (mm) In (mm) Lbs (Kg)
RFB-1.5 1.5 (38) 8.88 (226) 11.50 (292) 6.25 (159) 5.75 (146) 3.75 (95) 3 (76) 17 (8)
RFB-2 2.0 (51) 8.88 (226) 11.88 (302) 8.25 (210) 6.00 (152) 4.00 (102) 3 (76) 21 (10)
RFB-2.5 2.5
(64) 12 (305) 15.38 (391) 10 (254) 7.82 (199) 5.5 (140) 3 (76) 34 (16)
RFB-3 3.0
(76) 16.00 (406)
19.94 (506) 11.25 (286) 9.81 (249) 7.50 (191) 4 (102) 50 (21)
RFB-3.5 3.5
(89) 16.00
(406) 20.50 (521) 13.50
(343) 10.13 (257) 7.50 (191) 4 (102) 61 (28)
RFB-4 4.0 (102) 16.00 (406) 21.00 (533) 17.50 (445) 10.31 (261) 7.50 (191) 5 (127) 72 (33)
RFB-4.5 4.5 (115) 18 (458) 23.25 (591) 18.5 (470) 11.38 (290) 8.5 (216) 5 (127) 87 (40)
RFB-5 5.0 (127) 19.50 (495) 25.50 (648) 19.50 (495) 12.50 (318) 9.50 (241) 5 (127) 120 (54)
RFB-6 6.0 (152) 19.50 (495) 26.75 (679) 25.50 (648) 13.13 (334) 9.50 (241) 5 (127) 172 (78)
RFB-8 8.0 (203) 26.50 (673) 35.50 (902) 27.50 (699) 17.38 (441) 12.50 (318) 5 (127) 295 (134)
RFB-10 10.0 (254) 34.00 (864) 45.13 (1146) 33.50 (851) 22.25 (565) 16.00 (406) 5 (127) 500 (227)
RFB-12 12.0
(305) 40.00 (1016) 52.88 (1343) 40.50 (1029) 25.94 (659) 19.00 (483) 5 (127) 782 (355)
Options
— Aluminized steel, 304, 316 or 316L stainless steel, Corten Steel
— Custom inlet/outlet configurations
—
Thermal insulation blankets to suit all configurations
— Sample part number RFB-4-CCW-ST-C-B
Straight Through (ST)
Typical Orientations
Reverse Flow (RF)
Side Discharge (SD)
Products shown in counterclockwise
position. Also available in clockwise
Side Out (SO)