NORDsilencers Ventilation system silencers

Transcription

1 NORDsilencers Ventilation system silencers

2 NORDsilencers 0 Contents General NRF 0/NRP 0 Silencer NRF 00/NRP 00 Silencer NRFB 0/NRPB 0 Silencer NRFB 00/NRPB 00 Silencer NMF/NMP Silencer NMFE/NMPE Silencer NKF/NKP Silencer NKFA/NKPA Silencer NKE Silencer NRFV/NRPV Bend-silencer MSK/MSP Silencer MSKI/MSPI Silencer MSKA/MSPA Silencer MPK Bend-silencer

3 General. Material Basic products are made of hot-dipped sheet metal, with a coating depth of g/m² on both sides (material thickness 0.-. mm). Aluminium, acid-proof and stainless steel products are optional. Product materials and respective standards: -- Hot-dip galvanized steel sheet according to standard EVS-EN 0:0, DXD+Z -- Stainless steel according to standard EVS-EN 00-:0, EN.0 or AISI 0 -- Acid proof steel according to standard EVS-EN 00-:0, EN. or AISI -- Aluminium according to standard EVS-EN -:00+A:00, [AlMg] -- Aluzinc according to standard EVS-EN 0:0, DXD+AZ. Material markings Basic materials are not mentioned in product marking (basic material hot-dip galvanized steel sheet) Other materials: R stainless steel AISI 0 H acid-proof steel AISI A Aluminium AZ Aluzinc NORDsilencers 0 Images are for illustrative purposes We reserve the right to make changes

4 NRF 0/NRP 0 Silencer d D Round silencer with 0 mm sound absorption. NRF-silencer's sound absorption material is mineral wool and NRP-silencer's a synthetic sound insulation. The perforated inner tube and outer shell are manufactured of galvanized steel. Between the inner tube and the insulation, there is fabric to prevent wool particles from the duct system. NORDsilencers NRF 0/NRP 0 0 Sound attenuation by octave bands, dimensions and weights NRF 0 (absorption material is mineral wool) size Weight, Ød mm, mm Ød,mm kg

5 NRP 0 (absorption material synthetic sound insulation) size Weight, Ød mm, mm Ød,mm kg , , , , 00 0, 00, 00 0, , , , , , , , , , , , , , , , , , , Product codes NRF 0 Ød Marking Diameter enght NORDsilencers NRF 0/NRP 0 0 NRF absorption material mineral wool NRP absorption material synthetic sound insulation Example: NRF 0-00 Images are for illustrative purposes We reserve the right to make changes

6 NRF 00/NRP 00 Silencer d D NORDsilencers NRF 00/NRP 00 0 Round silencer with 00 mm sound absorption. NRF-silencer's sound absorption material is mineral wool and NRP-silencer's a synthetic sound insulation. The perforated inner tube and outer shell are manufactured of galvanized steel. Between the inner tube and the insulation, there is fabric to prevent wool particles from entering the duct system. Sound attenuation by octave bands, sizes and weights NRF 00 (absorption material is mineral wool) size Weight, Ød mm, mm Ød,mm kg , , 00, 00, , , , ,

7 NRP 00 (absorption material synthetic sound insulation) size Weight, Ød mm, mm Ød,mm kg , , , , 00 0, 00, , , , NORDsilencers NRF 00/NRP 00 0 Product codes NRF 00 Ød Marking Diameter enght NRF absorption material mineral wool NRP absorption material synthetic sound insulation Example: NRF Images are for illustrative purposes We reserve the right to make changes

8 NRFB 0/NRPB 0 Silencer d D 0 NORDsilencers NRFB 0/NRPB 0 0 Round silencer with 0 mm sound absorption and 0 mm absorption element. NRFB-silencer's sound absorption material is mineral wool and NRPB-silencer's a synthetic sound insulation. The perforated inner tube and outer shell are manufactured of galvanized steel. Between the inner tube and the insulation, there is fabric to prevent wool particles from entering the duct system. Sound attenuation by octave bands, sizes and weights NRFB 0 (absorption material is mineral wool) size Weight, Ød mm, mm Ød,mm kg Product codes NRFB 0 Ød Marking Diameter enght NRFB absorption material mineral wool NRPB absorption material synthetic sound insulation Example: NRFB

9 NRFB 00/NRPB 00 Silencer d D 00 Round silencer with 00 mm sound absorption and 00 mm absorption element. NRFB-silencer's sound absorption material is mineral wool and NRPB-silencer's a synthetic sound insulation. The perforated inner tube and outer shell are manufactured of galvanized steel. Between the inner tube and the insulation, there is fabric to prevent wool particles from entering the duct system. Sound attenuation by octave bands, sizes and weights NRFB 00 (absorption material mineral wool) size Weight, Ød mm, mm Ød,mm kg NRPB 00 (absorption material synthetic sound insulation) Weight, size Ød mm, mm Ød,mm kg NORDsilencers NRFB 00/NRPB 00 0 Images are for illustrative purposes We reserve the right to make changes

10 Product codes NRFB 00 Ød Marking Diameter enght NRFB absorption material mineral wool NRPB absorption material synthetic sound insulation Example: NRFB NORDsilencers NRFB 00/NRPB

11 NMF/NMP Silencer B d A NMF-low rectangular silencer with round duct connections for round duct systems. Suitable for general ventilation system sound attenuation and connectin with regulating devices, especially in situations where silencer dimensions should be smaller and the sound attenuation characteristics good. NMF-silencer's sound absorption material is mineral wool and NMP-silencer's a synthetic sound insulation. Between the mineral wool and perforated inner tube, there is fabric to prevent wool particles from entering the duct system. Standard lenghts are 00 and 000 mm. Sound attenuation by octave bands, dimensions and weights NMF (absorption material mineral wool) size Ød mm, mm a, mm b, mm Weight, kg NORDsilencers NMF/NMP 0 Product codes NMF Ød Marking Diameter enght NMF absorption material mineral wool NMP absorption material synthetic sound insulation Example: NMF -00 Images are for illustrative purposes We reserve the right to make changes

12 NMFE/NMPE Silencer d B C A l NORDsilencers NMFE/NMPE 0 NMFE-low rectangular non-concentric silencer with round connection for round duct systems. Outer shell and inner tube are manufactured of galvanized steel. NMFE-silencer's sound absorption material is mineral wool and NMPE-silencer's a synthetic sound insulation. Between the mineral wool and perforated inner tube, there is fabric to prevent wool particles from entering the duct system. Sound attenuation by octave bands, sizes and weights NMFE (absorption material mineral wool) size Ød mm, mm a, mm b, mm c, mm Weight, kg , , , , , , , , , , , NMPE (absorption material synthetic sound insulation) , , , , , Product codes NMFE Ød Marking Diameter enght NMFE absorption material mineral wool NMPE absorption material synthetic sound insulation Example: NMFE -00

13 NKF/NKP Silencer d A B Rectangular silencer with round duct connections. Outer shell and inner tube are manufactured of galvanized steel. Connections with rubber gaskets. NKF-silencer's absorption material is mnineral wool and NKP-silencer's a synthetic sound insulation. Sound absorption material mineral wool covered in fabric to prevent wool particles from entering the duct system. NKF/NKP-Silencers are type-approved (VTT-RTH-000-). Tightness class C according to standard EN :00. Sound attenuation, dimensions and weights Airflow channel formed by the inner tube and absorption material is designed for good absorption values and easy access for cleaning. Standard lengths 00 and 000 mm. size Ød- mm, mm A, mm B, mm Weight, kg , , -00 0, , , , , , , , , , , , , , , , NORDsilencers NKF/NKP 0 Images are for illustrative purposes We reserve the right to make changes

14 NORDsilencers NKF/NKP 0 NKF 00 (absorption material mineral wool) size Ød- mm > , NKF 000 (absorption material mineral wool) >0 >0 >0-000 >0 > > > NKP 00 (absorption material synthetic sound insulation) size Ød- mm NKP 000 (absorption material synthetic sound insulation)

15 Pressure drop and sound power level NKF/NKP 00 Pressure drop ptot (Pa) Air flow q v (l/s) WA, db(a) NKF/NKP 000 Pressure drop ptot (Pa) WA, db(a) Air flow q v (l/s) Noise generation by octave bands Formula for noise generation by octave bands: wokt = wa + K okt wa = sound power level, db(a) Correction values for noise generation K okt by octave bands (db) NKP NKF NKP NKF Correction values applicable for typical airflow speeds (airflow speed c. m/s). Product codes NORDsilencers NKF/NKP 0 NKP Ød Marking Diameter enght NKF absorption material mineral wool NKP absorption material synthetic sound insulation Example: NKP Images are for illustrative purposes We reserve the right to make changes

16 NKFA/NKPA Silencer, openable B d A NORDsilencers NKFA/NKPA 0 NKFA/NKPA-openable rectangular silencer with with round duct connections. Suitable for general ventilation system sound attenuatio, especially in situations where silencer dimensions should be smaller and the sound attenuation characteristics good. Tightness class B according to standard EN :00. Sound attenuation, dimensions and weights NKFA-silencer's the outer shell and inner tube are manufactured of galvanized steel. Connections with rubber gaskets. NKFA-silencer's absorption material is stone wool and NKPA-silencer's polyester. Between the stone wool and the perforated inner tube there is fabric to prevent wool particles from entering the duct system. Airflow channel formed by the inner tube and absorption material is designed for good absorption values and easy access for cleaning. Standard lengths 00 and 000 mm. NKFA 00 (absorption material mineral wool) size Ød mm Sound attenuations (db), mm A, mm B, mm Weight, kg , 0, 0 0, , 0 0 0, 0 0 NKFA 000 (absorption material mineral wool) , , , ,

17 NKPA 00 (absorption material synthetic sound insulation) size Weight, Ød mm, mm A, mm B, mm kg , 0 0 0, 00 0, 0 0 0, 0 0 NKPA 000 (absorption material synthetic sound insulation) , 00, , , , , NKPA 00 (absorption material synthetic sound insulation) , , , , Pressure drop NKPA/NKFA 00 Painehäviö ptot Pressure drop (Pa) Ilmavirta q v (l/s) Air flow (l/s) NKPA/NKFA 000 Pressure Painehäviö drop ptot (Pa) Ilmavirta q v (l/s) Air flow (l/s) NORDsilencers NKFA/NKPA 0 NKPA/NKFA Pressure Painehäviö drop ptot (Pa) Ilmavirta q v (l/s) Air flow (l/s) Images are for illustrative purposes We reserve the right to make changes

18 Product codes NKFA Ød Marking Diameter enght NKFA absorption material mineral wool NKPA absorption material synthetic sound insulation Example: NKPA NORDsilencers NKFA/NKPA 0

19 Example: NKFA -00 NKE Silencer d B A NKE rectangular silencer with round duct connections and without perforated sheet inside. Suitable for general ventilation system silencer, especially in situations where the silencer dimensions should be smaller and the absorption values should be good. Design and dimensions NKE's outer shell is made of galvanized sheet steel. Connections are with rubber gaskets. Sound absorption duct element with good attenuation characteristics is made from special formed synthetic material and covered by fabric. Standard lengths 00 and 000 mm. Sound attenuation size Ød mm, mm A, mm B, mm Weight, kg , 0, , , , 00, 0 00, , Pressure drop NORDsilencers NKE 0 NKE NKE Pressure drop (Pa) 0 0 Pressure drop (Pa) Air flow q v (l/s) Air flow q v (l/s) Images are for illustrative purposes We reserve the right to make changes

20 Product codes NKE Ød Marking Diameter enght Example: NKE -00 NORDsilencers NKE 0 0

21 r Example: NKFA -00 l D d l NRFV/NRPV Bend silencer Design Round ventilation system silencer with round connections and rubber gaskets (according to standard EVS- EN 0). NRFV-silencer's sound absorption material is mineral wool and NRPV-silencer's a synthetic sound insulation. The perforated inner tube and outer shell are manufactured of galvanized steel. Between the inner tube and the mineral wool insulation, there is fabric to prevent wool particles from entering the duct system. Dimensions and weights Sound attenuation NRFV, insulation thickness 0 mm (absorption material mineral wool) size Weight, Ød mm ØD, mm l, mm kg 0, , , 0 0 0, 0, Product codes NRFV 0 Marking Insulation thickness Ød Diameter NRFV absorption material mineral wool NRPV absorption material synthetic sound insulation NORDsilencers NRFV/NRPV 0 Example: NRFV 0- Images are for illustrative purposes We reserve the right to make changes

22 MSK/MSP Rectangular silencer NORDsilencers MSK/MSP 0 MSK/MSP-rectangular silencer for rectangular duct systems. Suitable for use in exhaust, intake, discharge and supply air handling systems. The elements are available in a widths 00, 0, 00 and 00 mm. Standard lengths of rectangular silencers are 000 and 0 mm. Design and dimensions The MSK and MSP consists of an outer shell and absorption element manufactured of galvanized steel (standard) with z-flange at both ends. Silencers can also be manufactured of aluminium, stainless steel or acid-proof steel. MSK absorption material: mineral wool board, covered with black glass fibre textile. MSP absorption material: synthetic sound insulation. MSK Sound attenuation (absorption material mineral wool) (Width a= 00, 00, 00, 00, 000, 00, 00, 00, 00, 000, 00, 00) Element width MSK Elements spacing enght 0 00 k k k k Element width Elements spacing enght 0 00 k k k k Element width Elements spacing enght 0 00 k k k k

23 MSP sound attenuation (absorption material synthetic sound insulation) (Width a= 00, 00, 00, 00, 000, 00, 00, 00, 00, 000, 00, 00) MSP Element width Elements spacing enght 0 00 k k k k Element width Elements spacing enght 0 00 k k k k Element width Elements spacing enght 0 00 k k k k Product codes MSK A x B Marking Width x Height enght Element width x Quantity MSK absorption material mineral wool MSP absorption material synthetic sound insulation f x n NORDsilencers MSK/MSP 0 Example: MSK 00x x MSP 00x x Images are for illustrative purposes We reserve the right to make changes

24 MSKI/MSPI Silencer B i f NORDsilencers MSKI/MSPI 0 MSK/MSP-rectangular silencer for rectangular duct systems. Suitable for use in exhaust, intake and discharge, supply air handling systems. The elements are available in a widths 00, 0, 00 and 00 mm. Standard lengths of rectangular silencers are 000 and 0 mm. Design and dimensions MSKI and MSPI-silencers with noise reducing insulation are covered with galvanized sheet metal plate and the internal casing are made of perforated sheet metal plate. Dimensions a and b are for the internal casing. Z-flange are attached to the internal casing at both ends. MSKI absorption material: mineral wool board, covered with black glass fibre textile. MSPI absorption material: synthetic sound insulation. For ventilation systems used in aggressive environments (or as special requirements) MSKI/MSPI silencers could be made of aluminium, stainless steel or acid-proof steel in special order. Product codes MSKI A x B Marking Width x Height enght Element width x Quantity MSKI absorption material mineral wool MSPI absorption material synthetic sound insulation f x n A i Insulation Example: MSKI 00x x-MP0 MSPI 00x x-MP0

25 MSKA/MSPA Silencer, openable B A f i +00 MSKA/MSPA-openable rectangular silencer for rectangular duct systems. Suitable for use in exhaust, intake, discharge and supply air handling systems. The elements are available in a widths 00, 0, 00 and 00 mm. Standard lengths of rectangular silencers are 000 and 0 mm. Silencer caseing tightness class C. Design and dimensions MSKA/MSPA casing and absorption elements are manufactured of galvanized steel (standard) with z-flange at both ends. MSKIA/MSPIA insulated outer casing and absorption elements are manufactured of galvanized steel sheet. Measures a and b are the internal casing dimensions. Z-flanges for duct connection are attached to the internal casing. MSKA/MSKIA absorption material: mineral wool board, covered with black glass fibre textile. MSPA/MSPIA absorption material: synthetic sound insulation. Silencers can also be manufactured of aluminium, stainless steel or acid-proof steel in special order. Product codes MSKA A x B Marking Width x Height enght Element width x Quantity MSKA absorption material mineral wool MSPA absorption material synthetic sound insulation f x n NORDsilencers MSKA/MSPA 0 Example: MSKA 00x00 0- MSKIA i A x B f x n Marking Insulation Width x Height enght Element width x Quantity MSKIA absorption material mineral wool MSPIA absorption material synthetic sound insulation Example: MSKIA-S0 00x00 0- Images are for illustrative purposes We reserve the right to make changes

26 b MPK Rectangular bend-silencer f a length Keskjoone of the pikkus centerline =a+x+y =a+x+y b f a x y MPK- horisontal y x length Keskjoone of the pikkus centerline =a+x+y =b+x+y b NORDsilencers MPK 0 The MPK-rectangular bend silencer is designed for noise reduction in rectangular ventilation systems. Keskjoone pikkus There are two different types of MPK silencers vertical and horizontal. =a+x+y The outer shell can be without insulation or insulated. Design b MPK silencer consists of an outer shell and absorption elements manufactured of galvanized steel as standard with z-flange at both ends. MPKI silencers with noise reducing insulation are covered with galvanized sheet metal plate and the internal casing are made of perforated sheet metal plate. Dimensions a and b are for the internal casing. Z-flange are attached to the internal casing at both ends. f a f a x y MPK- vertical Sound attenuation Choose from MSK table suitable silencer, which damping characteristics are sufficient and also calculate the length of the centerline of the silencer using the following formula: Horizontal pad: = a + x + y Vertical pad: = b + x + y

27 Product codes MPK Marking Type - horisontal - vertical Width x Height Example: MPK- 00x x Marking A x B x - y f x n Depression min. 0 mm Element width x Quantity MPKI i A x B x - y f x n Type - horisontal - vertical Example: MPKI- MP0-00x x00 Insulation Width x Height Depression min. 0 mm Element width x Quantity NORDsilencers MPK 0 Images are for illustrative purposes We reserve the right to make changes

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