Silencers Catalog

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PRODUCT CATALOGUE

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Heating, Ventilation, Air Condition & Refrigeration Systems for Marine and Offshore Purposes www.teknotherm.pl �

73-21 SILENCERS

CONTENT PAGE 1. CIRCULAR SILENCERS – SIL ...........................................................................................................4 2. BAFFLE NOISE SILENCER – BS .......................................................................................................6 3. NOISE SILENCER – NS ......................................................................................................................7 4. NOISE ABSORBING BAFFLES – NAB .............................................................................................9 5. NOISE ABSORBING MODULES – NAM ........................................................................................10 6. NOISE SILENCER – SLQ ..................................................................................................................11

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CIRCULAR SILENCERS – SIL 73-21-100 2013

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DESCRIPTION The SIL silencer is made of spirally wound steel pipe as an outer casing and an internal perforated tube. The space between the outer coating and the perforated tube is filled with sound-absorbing mineral wool. The polyester fabric between the perforated tube and the mineral wool prevents wool from penetrating into the duct. The silencer is typically supplied with gaskets. Diameters D1>315mm require an additional NSL coupling must be ordered. Thickness of glass mineral wool depends on the dimension of the outer casing. TECHNICAL SPECIFICATION & DIMENSIONS SIL-50 – 50mm thickness insulation Description

SIL Dimensions [mm] Attenuation [dB] for frequency [Hz] Weight

[kg] ØD1 ØD L 125 250 500 1000 2000 4000 80-300 80 180 300 5 11 15 25 28 23 2 80-600 80 180 600 7 18 26 29 29 24 3 80-900 80 180 900 9 26 38 33 30 26 5 80-1200 80 180 1200 11 30 36 37 31 27 7 100-300 100 200 300 5 9 12 20 25 17 2 100-600 100 200 600 7 15 25 33 29 24 3 100-900 100 200 900 9 22 32 36 33 31 5 100-1200 100 200 1200 11 25 36 39 37 38 7 125-300 125 224 300 3 7 14 19 16 19 3 125-600 125 224 600 5 13 21 37 37 31 4 125-900 125 224 900 7 16 28 38 38 35 7 125-1200 125 224 1200 9 20 34 39 39 36 9 160-300 160 260 300 2 8 12 15 15 14 3 160-600 160 260 600 3 11 22 33 42 29 6 160-900 160 260 900 8 14 23 39 37 25 8 160-1200 160 260 1200 11 19 35 38 47 41 10 200-300 200 315 300 2 4 8 15 18 13 4 200-600 200 315 600 4 8 15 31 28 20 7 200-900 200 315 900 8 9 20 32 35 23 10 200-1200 200 315 1200 11 17 26 34 40 26 12 250-600 250 355 600 6 9 13 24 15 15 9 250-900 250 355 900 8 11 20 33 24 18 12 250-1200 250 355 1200 10 13 25 38 29 24 15

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CIRCULAR SILENCERS – SIL 73-21-100 2013

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SIL-100 – 100mm thickness insulation Description

SIL Dimensions [mm] Attenuation [dB] for frequency [Hz] Weight

[kg] ØD1 ØD L 125 250 500 1000 2000 4000 315-600 315 500 600 5 5 11 19 12 10 12 315-900 315 500 900 7 9 16 30 18 14 18 315-1200 315 500 1200 9 12 21 36 18 17 24 400-600 400 600 600 5 6 9 13 10 7 16 400-900 400 600 900 7 7 14 22 15 13 22 400-1200 400 600 1200 7 10 14 22 18 13 32 500-900 500 710 900 6 8 14 16 13 13 26 500-1200 500 710 1200 8 11 22 24 17 16 39 630-900 630 800 900 4 7 12 12 12 10 44 630-1200 630 800 1200 5 10 16 15 15 11 56 800-1200 800 1000 1200 4 5 10 9 15 12 69 800-1500 800 1000 1500 4 7 13 12 15 12 86

SIL, D1�315mm

SIL, D1>315mm

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BAFFLE NOISE SILENCERS – BS 73-21-200 2013

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DESCRIPTION Noise silencers BS type are designed for reducing of noise transferred through the ventilation openings in walls on seagoing ships and offshore objects. Recommended face air velocity related to LxB sectional area is 4m/s. Silencers consist of steel casing with inserted noise absorbing and dismountable baffle plates. Baffles are made of steel framing filled-up with mineral wool lined with perforated, galvanized steel sheet. Standard surface treatment: hot dip galvanized, painted on request. MARKING Example: BS type noise silencer of length/height/depth 2300, 1850, 900mm: BS 2300x1850/900 TECHNICAL SPECIFICATION & DIMENSIONS

Length (L) and height (H) of casing – on request; standard depth – 900mm. Octave band [Hz] 63 125 250 500 1k 2k 4k 8k

dB(A) 7 9 11 15 14 19 21 16

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NOISE SILENCER – NS 73-21-210 2013

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DESCRIPTION Noise silencers NS type are designed for reducing of noise generated by marine axial flow fans. They may be installed directly at fan inlet and/or outlet. Silencers consist of steel tubular housing lined inside with sound absorbing mineral wool covered with perforated, galvanized steel sheet. In silencer axis a core filled-up with mineral wool, lined with perforated, galvanized steel sheet, is fitted. Both ends of silencers are lanced, with threaded holes. Standard surface treatment: hot dip galvanized. On request silencers may be painted with marine paints set. TECHNICAL SPECIFICATION & DIMENSIONS

Type Dimensions [mm]

Weight [kg] DN B A L N D NS-200 200 400 260 200 8 M10 10 NS-250 250 450 310 250 8 M10 12 NS-315 315 515 370 315 12 M10 15 NS-400 400 600 460 400 12 M10 29 NS-500 500 700 560 500 16 M10 81 NS-560 560 760 640 560 16 M12 67 NS-630 630 630 695 630 16 M12 86 NS-710 710 910 775 710 24 M12 106 NS-800 800 1000 865 800 24 M12 154 NS-900 900 1100 965 900 32 M12 202 NS-1000 1000 1200 1065 1000 32 M12 247 NS-1120 1120 1320 1205 1120 32 M12 340 NS-1250 1250 1450 1335 1250 32 M12 362 NS-1400 1400 1600 1485 1400 32 M12 490 NS-1600 1600 1800 1685 1600 32 M12 602

Octave band [Hz] 63 125 250 500 1k 2k 4k 8k

dB(A) 1 5 11 18 17 16 12 12

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NOISE SILENCER – NS 73-21-210 2013

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NOISE ABSORBING BAFFLES – NAB 73-21-220 2013

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DESCRIPTION Noise absorbing baffles NAB type are destined for reducing of noise transferred through the ventilation ductwork of ventilation systems on seagoing ships. NAB baffles are intended for installation in main air intakes or main ventilation trunks. Recommended face air velocity related to the duct sectional area is 5m/s. Baffles consist of galvanized steel sheet framing filled-up with noise absorbing mineral wool, sheathed with water resistant aluminized fabric. Baffles are lined with galvanized, perforated steel sheet. Standard surface treatment: hot dip galvanized, painted on request. MARKING Example: NAB type noise silencer of dimension H=1600mm: NAB-1600x1000 TECHNICAL SPECIFICATION & DIMENSIONS The standard length of baffle is 1000mm, dimension H must be specified by the order. Recommended intervals between baffles are 300mm. The weight of baffle of e.g. H=2000mm is approx. 60kg. Octave band [Hz] 63 125 250 500 1k 2k 4k 8k

dB(A) 7 12 19 28 38 41 39 30 Average values of sound attenuation at length 1000mm and intervals D=300 mm.

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NOISE ABSORBING MODULES – NAM 73-21-230 2013

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DESCRIPTION Noise absorbing modules NAM type are destined for reducing of noise transferred through the ventilation ductwork of ventilation systems on seagoing ships. Recommended face air velocity related to the BxH duct sectional area is 5m/s. Modules consist of galvanized steel sheet framing filled-up with noise absorbing mineral wool, sheathed with water resistant aluminized fabric. Sheathing is tightened with sealing compound where perforated e.g. with fastening pins. Standard surface treatment: hot dip galvanized, painted on request. MARKING Example: NAM type noise silencer of dimensions A=700mm and B=1000mm: NAM-700x1000 TECHNICAL SPECIFICATION & DIMENSIONS Dimensions AxB must be defined by the order, recommended length of module (alongside the airflow direction) is 1000mm. Recommended intervals between modules is 200mm. Octave band [Hz] 63 125 250 500 1k 2k 4k 8k

dB(A) 5 7 10 13 12 16 19 14 Average values of sound attenuation at length 1000mm and intervals D=200 mm.

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NOISE SILENCER – SLQ 73-21-240 2013

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DESCRIPTION Rectangular duct silencers are intended for noise attenuation in ventilation and air conditioning systems. Most often they are placed between a fan and a supply or exhaust air duct, and before air diffusers. The silencer is made of housing with baffles inside. The housing is made of galvanized steel, has mounting frames with sheet metal joining profiles on its ends and is stiffened with transverse sheet corrugation. The baffles consist of galvanized steel frame and a sound-absorbing insert. The sound-absorbing insert is a combination of non-combustible mineral wool panels and its external surface is covered with a special abrasion resistant fabric, which protects mineral wool. ROCKWOOL panels are covered with a black glass fibre veil, with coating that can support air flow rates of 2m/s, as well as industrial ROCKWOOL panels are used. The maximum temperature of heat carrier is 250oC. The product is non-combustible. Depending on their design, there are two types of the baffles:

• A – absorptive baffles with all their surface covered with fabric. This type of baffles is used predominantly for low and medium frequencies.

• B – absorptive/resonator baffles, which are similar to the absorptive baffles, but the sound-absorbing insert on both sides of the baffle is screened across half the baffle surface with galvanized steel sheet.

These baffles are used mainly for medium and high frequencies. Distance “s” between the baffles is 40-100mm. Care should be taken when handling, storing and assembling silencers on site so as not to damage the surface of baffles. Rectangular silencers are placed in ventilation systems with vertical baffles. The allowable flow rate should be taken into account when selecting the type of silencer, depending on stream flow and the silencer’s own noise. Example of identification: SLQ-1-1-4-800-400-500, where three last numbers indicate on dimensions: a, b and L. DIMENSIONS

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NOISE SILENCER – SLQ 73-21-240 2013

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Baffle type A (c=100 or 200)

Baffle type B (c=100 or 200)

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Silencers Catalog

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