STAVOKLIMA V.O.S. HORNÍ 22 • CZ-370 04 • ÈESKÉ BUDÌJOVICE tel.: +420 387 428 990, +420 387 438 912 fax: +420 387 001 950 e-mail: [email protected] http://www.stavoklima.eu Representative: www.stavoklima.eu Panel silencers Glideflow - GDE SILENCERS PLACEMENT INTO STRUCTURAL OPENINGS OR AIR HANDLING EQUIPMENT SILENCERS ASSEMBLY INTO DUCTWORK – CONNECTION AND ANCHORAGE OF SILENCER SELF-NOISE OF SILENCERS EXAMPLE OF CALCULATION KEY FOR SILENCERS: Silencer type GD - coulisse with resonators GDE - absorption coulisse GDH - coulisse with resonators hygienic version GDHE - absorption coulisse hygienic version GDX - other version (temperature resistence, stainless steel version etc.) width 100 200 height 100-1000 length 500-2500 GD - 200 / 500 / 1000 Self-noise of silencer Lw Front velocity m/s 32 63 125 250 500 1000 2000 4000 8000 3 34 31 28 22 20 16 12 <10 <10 5 46 43 38 32 29 26 22 19 16 7 54 50 46 39 36 32 29 27 24 9 60 55 52 44 42 38 34 32 29 11 66 60 56 49 47 42 38 36 33 13 69 64 61 54 51 47 43 40 37 15 73 68 65 57 54 50 46 43 41 17 77 71 68 60 57 53 50 47 44 19 81 74 70 63 59 55 51 49 46 fm v HZ 32 63 125 250 500 1000 2000 4000 8000 A/C unit – noise source Lw (A) 61 68 75 77 74 69 65 64 60 Silencer attenuation 2 7 17 38 43 46 37 23 19 Self-noise of silencer 46 43 38 32 29 26 22 19 16 Result behind the silencer 59 61 58 40 33 30 29 41 41 CORRECTION for (A) 32 63 125 250 500 1000 2000 4000 8000 -39 -26 -16 -9 -3 0 1 1 -1 CORRECTION for pipe surface dB AxB (m2) 0,2 0,4 0,6 0,8 1,0 2,0 3,0 4,0 6,0 8,0 dB -7 -4 -3 -1 0 3 5 6 7 9 To make easy proposal and selection of the right combination of silencers in accordance with noise source and complete noise situation in ductwork, we have developed a special programm for this purpose - SELECTION PROGRAMM KEY FOR SILENCERS INTEGRATED INTO DUCTWORK Silencer type GD - coulisse with resonators GDE - absorption coulisse GDH - coulisse with resonators hygienic version GDHE - absorption coulisse hygienic version GDX - other version (temperature resistence, stainless steel version etc.) 900 Duct width MM silencers placed into ductwork from producer 500 Duct height MM 1000 Duct length MM T200 Width of used silencer N3 No. of silencers placed in duct PGDE - 900 / 500 -1000 / T200 - N3 At the silencers higher than 1000mm it is necessary to fi t the silencers of sectional heights with front and side connection clips. Front connection clip – GCS 100, 200. Side connection clip – GS universal for dimensions 100 and 200mm. Example: A/C unit 9.000 m3/h, pipe – velocity 5m/s, proposed silencers GDE 200 Request for silencer proposal, so the noise behind the silencer will be 65dB. TOT noise behind the silencer - 64 dB(A) => Silencer fulfi ls requested result Self-noise of silencers Glidefl ow is comparing with silencers in standard construction signifi cantly lower, which is secured thanks to special aerodynamic shape of the silencer. Self-noise of silencers is meassured according to ÈSN ISO 7235 in accredited acoustic laboratory. Mentioned data are valid for 1m2 surface. Silencers assembly into ductwork is made via self-cutting screws or rivets. While silencer assembly it is necessary to pay attention to precise spacing and to keep the distance among the silencers. GCS GS horizontal panel silencers GDE can not be placed horizontally vertical right placement of panel silencers GLIDEFLOW LW dB LW dB P kW P kW p p Technical modifications reserved I www.stavoklima.eu ATL