Cylindrical Silencers Construction - Home | …

1 Cylindrical Silencers Cylindrical SilencersConstructionAxial Fans are installed with Cylindrical Silencers toSilencer casings are of rolled, pre-galvanized steel reduce the sound to an acceptable level. Cylindricalsheet thick with end flange ring incorporated Silencers are commonly used as it can be connectedwith self-insert nuts for easy ends of directly to the round inlet or discharge side of a Silencers are drilled and tapped to match flanges of Rosenberg axial flow Cylindrical Silencers are available in twoThe absorbent material is an acoustic grade non-types:combustible mineral wool encassed by a galvanizedRS - open cylinder steel sheet. When a pod is fitted, it is ofRSM - fitted with an concentric pod, producing betterperforated metal, retaining an infill of acoustic grade silencer constructional intergrity is suitable forThree standard length of Silencers are available:-pressure up to One diameter length: RSM-1D and RS-1 DFor critically clean and wet conditions, hospitals2.

2 One and half diameter length: andand kitchen exhuast or moisture resistance area, lining of the acoustic infill can be provided to3. Two diameter length: RSM-2D and RS-2 Dprevent the ingress of moisture or grease. A smallreduction of attenuation in the higher frequencies duedue to this lining are and RS silencer are available from inner diam-eter of 315mm to performance data shown are obtained withtest conducted in accordance to ISO 7235 silencer attenuation is defined as the dynamic insertion loss. The values quoted in the tables attach-ed represent the difference between the sound powerlevel, dBW of a fan and silencer combination and thedBW rating of the fan insertion losses are the attenuation record-ed under working silencer have a pressure drop equivalent to aRSM Type Cylindrical Silencersimilar length of plain ducting with the same diameter.

3 RSM silencer dynamic pressure loss is:= x density of air x ( K factor) x (Face velocity)2= x (K factor) x (Face velocity)2K factor are given in the attached the pressure loss can be obtained fromthe pressure loss chart RangeStandard Silencers are suitable for temperature from-400c to finishing with galvanized zinc Type Cylindrical Silencerfinishing like epoxy paint are available with extra costtupon reserved the right to amend the specification of these proudcts without prior Silencers - RSM TypeType RSM with concentric podInner OuterSilencerKSilencer Silencer No. of PCD ThreadDiamDiamModel63125 250 5001K2K4K8 KfactorLengthWeight HolesEsize(mm)D (mm)mmkgG(mm)(mm)465 RSM Insertion Loss at Active Band (Hz)650 RSM SilencersPressure Loss Chart RSM- 1D SilencersPressure Loss Chart RSM- SilencersPressure Loss Chart RSM- 2D Silencers