6/S1 v 2.4 (en) SOUND ATTENUATORS PZ, PZC, PZM, PK www.klimaoprema.hr 9
TABLE OF CONTENTS Rectangular attenuators - PZ... 3 Round sound attenuators - PZC... 16 Interspace sound attenuator - PZM... 18 Definition of symbols: B [m] H [m] L [m] d [m] s [m] V [m 3 /h] v [m/s] p [Pa] - Attenuator width - Attenuator height - Attenuator length - Splitter width - Splitter gap - Air flow rate - Air velocity - Pressure drop f [Hz] m L [db] W L [db] WA De [db] L pa [db(a)] - Frequency - Sound power level - Sound power level (A-weighting) - Sound attenuation - Sound pressure level (A-weighting) 3
RECTANGULAR ATTENUATOR For sound attenuation in ventilation ducts and ventilated areas Aerodynamically shaped sound attenuation splitter reduces drag by % (energy savings) Sound attenuation splitters are made of flame retardant material, apsorption material Splitters are constructed in three standard thicknesses: d = mm, d = mm and d = mm Rectangular sound attenuators are available in five standard cross-section dimensions: d/s = /; /; /; / and / Attenuator casing is made of galvanised steel, fitted with flanges meeting criteria given in the table on page 3 Attenuators heavier than kg are supplied in two or more sections, each single section lighter than kg L SOUND ATTENUATION SPLITTER Absorption material rock-wool, non-flammable, according to Class A2, to DIN 42, Part 1. Significant attenuation in frequency span form 63 to 8Hz. Aerodynamic splitter shape. Splitter cover (lining): Glass fibre veil (V) - Very thin protective cover on the splitter surface Reflective plates (R) - Half of each side of the splitter (alternatively centre up and centre down) is fitted with galvanised tin plates Glass silk (S) - At air velocities higher than m/s Meets standards VDI 22, Part 1 and Part 3, DIN 1946, Part 2 and Part 4 and VDI 383. 311
Standard attenuator dimensions and weights ( no splitter lining) H 1 L Duct width B PZ / d/s = / PZ / d/s = / 4 7 13 1 16 8 1 1 12 16 24 28 32 36 41 4 49 3 13 18 23 27 32 37 41 46 27 34 41 48 62 69 76 83 9 22 38 46 4 62 7 78 1 29 39 49 8 68 78 88 98 8 118 128 32 43 4 66 77 88 111 37 63 76 88 1 114 127 1 13 16 41 7 8 99 114 129 143 18 24 29 34 4 6 61 66 72 19 2 31 37 43 49 61 31 49 8 67 76 8 94 3 112 121 33 43 3 63 73 83 93 3 1 43 6 68 81 94 6 119 132 144 17 17 46 74 88 2 116 1 14 71 88 4 121 137 13 17 186 2 219 9 77 9 113 132 1 168 186 31 38 44 1 8 64 71 77 84 91 26 33 47 62 69 76 2 63 74 8 96 7 118 129 1 11 43 67 79 91 3 11 127 1 72 88 3 119 134 1 16 181 196 212 77 94 111 127 144 161 178 93 113 133 13 173 193 212 232 22 272 77 99 1 142 164 186 7 229 46 4 62 7 78 86 94 2 1 49 7 66 74 83 91 77 9 3 116 129 142 1 168 182 67 81 9 9 123 137 11 1 117 167 18 178 198 219 239 2 28 122 144 166 188 2 232 147 173 198 224 2 27 1 327 32 127 14 182 9 237 264 292 78 9 2 114 126 138 1 162 69 81 94 6 119 132 1 138 16 174 192 2 228 24 6 12 144 163 182 1 1 162 186 2 234 28 281 329 144 169 19 2 24 27 4 234 264 293 323 33 383 412 182 213 24 277 8 3 119 133 146 1 174 188 94 9 123 137 12 1 18 1 221 242 262 283 114 166 187 6 2 1 21 242 269 296 323 3 378 19 223 22 28 9 27 3 337 371 439 472 24 281 316 32 388 H 1 L Duct width B PZ / d/s = / PZ / d/s = / PZ / d/s = / 1 2 27 8 1 2 28 8 1 2 28 19 28 34 42 7 6 72 22 39 48 7 66 2 36 46 7 67 78 33 46 9 72 8 98 112 12 37 2 67 82 97 113 43 61 8 98 116 134 1 46 6 84 2 121 1 19 177 2 74 9 117 138 1 61 87 113 139 16 191 84 8 133 17 181 2 67 9 123 11 179 7 79 113 147 18 2 248 28 38 47 7 67 77 87 97 41 2 64 7 86 36 64 78 92 6 47 64 81 98 11 132 149 166 1 7 89 8 127 146 61 8 9 133 17 181 1 66 9 114 138 162 186 2 234 71 98 12 12 179 6 86 1 14 188 222 26 8 116 147 178 9 2 271 3 92 127 162 196 231 266 111 1 199 246 287 331 36 48 61 73 8 98 1 122 38 2 66 79 93 6 46 64 81 99 116 134 81 2 123 144 16 186 7 64 87 1 133 16 179 78 8 138 167 197 227 1 8 114 144 173 3 232 262 291 91 123 1 188 2 22 1 12 194 236 278 331 9 147 18 224 262 338 376 117 19 242 284 32 142 196 21 39 413 44 9 74 89 3 118 133 148 47 63 79 9 111 127 7 78 99 1 141 162 74 99 124 149 173 198 223 248 78 132 19 186 212 96 131 167 2 238 273 1 112 1 189 228 266 344 382 118 19 1 242 283 32 14 1 26 311 367 422 142 19 239 288 336 38 434 482 149 2 24 6 39 411 184 24 324 394 463 33 62 84 6 128 1 171 193 21 6 88 111 134 17 18 81 112 143 174 236 98 131 164 198 231 264 298 331 2 137 172 8 243 279 127 174 222 27 318 366 1 133 178 223 268 313 38 3 448 139 187 234 282 3 378 172 237 2 366 431 496 169 22 281 338 394 41 7 64 176 236 296 36 417 477 218 381 463 44 62 72 98 123 148 173 198 223 249 7 1 128 14 18 7 94 1 166 2 238 274 113 12 19 228 266 4 343 381 117 18 198 238 278 319 147 2 27 312 366 421 1 14 6 27 8 39 411 462 13 1 214 268 322 377 431 274 348 422 49 69 19 2 324 388 42 17 81 64 3 271 339 7 47 34 23 34 438 31 624 717 312
Standard attenuator dimensions and weights ( with splitter lining) H 1 L Duct width B PZ / d/s = / PZ / d/s = / 4 7 13 1 16 8 1 1 1 21 26 32 37 43 48 4 9 6 7 16 22 29 3 41 47 3 9 2 3 44 4 63 72 82 91 1 1 119 27 38 48 9 69 79 9 1 36 49 62 7 89 2 11 129 142 1 169 38 3 68 83 97 112 127 142 46 63 8 97 11 132 149 166 183 218 49 68 87 7 126 14 164 183 24 32 41 49 7 66 74 82 91 99 7 2 34 43 2 61 7 79 88 4 68 82 96 1 124 138 11 16 179 42 7 72 87 2 117 132 147 1 6 76 9 11 134 14 173 193 212 232 21 9 8 1 122 143 164 18 6 73 98 123 148 173 198 223 248 273 298 323 76 3 1 17 184 211 238 26 44 67 78 89 111 122 133 144 3 46 8 7 81 93 116 74 92 1 129 147 16 184 2 221 239 7 77 96 11 13 14 174 193 1 3 129 14 18 6 231 27 283 8 334 8 7 134 162 189 216 243 27 132 16 198 231 264 297 3 363 396 429 3 138 173 7 242 277 312 347 7 84 98 112 12 139 13 167 181 8 73 87 1 116 1 14 116 139 162 184 7 2 23 276 299 96 1 144 168 192 21 239 1 171 239 273 7 341 37 4 444 141 177 212 248 283 319 34 217 2 3 436 389 432 47 18 62 179 224 269 314 39 4 449 11 13 14 173 193 212 232 21 98 118 138 18 178 198 181 211 241 271 2 332 362 392 1 186 217 249 28 311 1 247 288 329 37 411 41 492 33 212 24 297 339 381 423 313 36 416 468 19 71 622 674 269 322 376 429 483 36 18 181 4 226 249 272 294 139 162 18 8 232 248 283 318 33 388 423 48 218 24 29 326 362 1 337 38 432 48 27 7 622 297 346 39 444 493 426 486 46 6 666 726 786 376 438 499 61 623 H 1 L Duct width B PZ / d/s = / PZ / d/s = / PZ / d/s = / 1 2 27 8 1 2 28 8 1 2 28 23 32 42 1 61 7 8 89 2 36 47 7 68 79 29 42 68 81 93 38 4 7 86 2 118 134 1 42 78 96 114 132 49 71 92 114 13 17 1 4 76 99 121 144 166 189 211 8 1 136 161 186 69 1 1 19 2 69 98 127 16 18 214 243 277 77 9 142 17 7 2 89 128 167 6 24 284 3 49 62 76 9 4 117 131 37 2 67 82 97 112 4 63 82 119 137 8 81 3 126 149 171 194 217 62 87 111 136 161 18 73 4 134 16 19 226 1 81 112 144 176 7 239 271 2 86 121 16 19 22 29 2 14 187 229 272 314 4 144 18 22 266 7 347 388 111 1 244 288 332 131 18 2 294 348 3 47 6 83 1 119 137 1 173 69 88 7 126 14 84 8 132 17 181 77 7 136 166 19 224 24 283 81 113 144 176 7 239 97 137 176 216 2 294 1 8 148 189 2 271 312 33 393 113 17 1 244 288 332 13 19 244 299 33 8 138 19 242 29 347 399 41 4 14 1 27 313 369 42 173 242 312 382 41 21 9 81 4 126 148 17 192 21 62 8 8 132 1 179 7 13 16 19 22 97 133 169 241 277 313 349 1 139 177 21 23 292 121 17 218 266 31 363 1 142 196 2 3 37 411 46 18 148 4 261 318 374 431 179 21 323 39 467 39 18 247 31 383 4 18 86 63 187 28 3 1 472 44 2 316 6 496 87 677 81 112 143 174 237 268 299 83 116 148 18 213 24 3 14 188 2 273 31 126 173 221 268 316 363 411 48 1 179 229 278 328 378 19 232 286 3 414 478 1 171 23 299 362 426 49 4 618 177 243 3 377 444 214 38 471 6 642 216 296 376 47 37 617 697 777 223 7 391 47 9 643 27 377 484 91 698 8 9 131 167 4 2 277 313 349 97 13 172 2 247 28 121 17 2 269 319 368 147 2 28 313 368 423 478 33 11 8 266 323 38 437 18 29 334 8 482 6 1 274 348 422 496 7 644 717 282 39 436 13 9 2 349 448 74 64 744 22 34 438 623 716 89 92 29 36 42 49 64 742 314 438 61 68 89 933 313
Connecting more attenuators Sections of the attenuator are connected with built-in flanges and bolts Contact flange surfaces can be additionally fixed by reinforcement holders Prior to attenuator delivery, sections of each attenuator are assembled and disassembled in the factory. Connection along width Connection along length H d s L B Connection along height Four and eight sectional attenuator 314
Attenuation diagram, type PZ / De [db] 63 12 2 8 f [Hz] Selection diagram H 1 brzina zraka v ef [m/s] 3 4 6 B 4, 7 otpor p [Pa] 4 1 7 13 1 16 7 13 1 16 13 1 16 13 1 16 1 16 16 d/s = / Width B No. of splitters 2 4 3 4 7 6 7 8 13 9 1 16 11 12 1 2 3 4 količina zraka V [m 3 /h] x 3 1 31
Attenuation diagram, type PZ / De [db] 63 12 2 8 f [Hz] Selection diagram H 1 B 1 8 2 1 8 1 8 1 1 1 1 1 1 1 1 d/s = / Width B No. of splitters 2 3 8 4 6 1 7 1 8 9 3 4 6 otpor p [Pa] brzina zraka v ef [m/s] 8 1 količina zraka V [m 3 /h] x 3 316
Attenuation diagram, type PZ-R / De [db] 63 12 2 8 f [Hz] Example: Given: Airflow rate: V= m 3 /h Required attenuation: 24 db (A) at 2 Hz Solution: Dg 1: PZ-R / Attenuator length: L = 1 mm Dg 2: Effective air velocity v ef =, m/s Pressure drop Δ P tot = 17 Pa Attenuator cross-section B x H = 13 x or x Dg. 7: Frequency Hz 12 2 Flow regenerated noise db (A) 39 31 27 A tot = B x H=,81 m2 Tab. 9: correction db (A) -2-2 -2 Total air flow regenerated noise db(a) 37 29 2 In each octave band noise values determined above have to be by 9 db(a) lower than the attenuated source noise measured after the attenuator (see Figure). Sound Prigušivač attenuator zvuka Nivo Source buke noise izvora before attenuator prije prigušenja Remaining Mjesto mjerenja noise measurement point preostale buke 317
Attenuation diagram, type PZ-R / De [db] 63 12 2 8 f [Hz] Hz 2 Hz Hz Hz Hz Lw [db] Nivo šumnosti [db] 2 Hz 12 Hz 63 Hz Hz Hz Lw nivo [db] šumnosti [db] 12 Hz 63 Hz 3 1 18 brzina zraka v ef [m/s] 3 1 18 brzina zraka v ef [m/s] Airflow regenerated noise diagram for d/s = / (based on outlet size B x H = A tot = 1m 2 ) Airflow regenerated noise diagram for d/s = / (based on outlet size B x H = A tot = 1m 2 ) Correction table A tot [m 2 ],2,,7 1 1,2 1, 2 Correction db (A) -6-3 -2 1 2 3 318
Attenuation diagram, type PZ / De [db] 63 12 2 8 f [Hz] H 1 3 4 B 1 1 2 2 27 1 3 4 1 2 27 1 1 2 27 2 27 2 27 2 27 d/s = / Width B No. of splitters 2 9 3 4 1 6 7 2 8 27 9 brzina zraka v ef [m/s] 6 1 otpor p [Pa] količina zraka V [m 3 /h] x 3 319
Attenuation diagram, type PZ / De [db] 63 12 2 8 f [Hz] 198 148 48 Selection diagram H B 1 8 8 1 8 2 28 1 1 2 1 2 28 28 2 28 1 2 2 28 28 d/s = / Width B No. of splitters 8 2 1 3 1 4 2 6 28 7 2 3 4 6 1 otpor p [Pa] brzina zraka v ef [m/s] količina zraka V [m 3 /h] x 3 1 1 3
Attenuation diagram, type PZ-R / De [db] 63 12 2 8 f [Hz] Example: Given: Airflow rate: V= m 3 /h Required attenuation: 18 db (A) at 2 Hz Solution: Dg 1: PZ-R / Attenuator length: L = 1 mm Dg 2: Effective air velocity v ef = 7 m/s Pressure drop Δ p tot = 17 Pa Attenuator cross-section B x H = 2 x or 1 x Dg. 7: Frequency Hz 12 2 Flow regenerated noise db (A) 37 32 29 A tot = B x H=,81 m 2 Tab. 9: correction db (A) 2 2 2 Total air flow regenerated noise db(a) 39 34 31 In each octave band noise values determined above have to be by 9 db(a) lower than the attenuated source noise measured after the attenuator (see Figure). Sound Prigušivač attenuator zvuka Nivo Source buke noise izvora before attenuator prije prigušenja Remaining Mjesto mjerenja noise measurement point preostale buke 321
Attenuation diagram, type PZ / De [db] 63 12 2 8 f [Hz] H 1 B 1 2 2 28 28 d/s = / Width B No. of splitters 8 2 količina zraka V [m 3 /h] x 3 otpor Δ p [Pa] brzina zraka 1 2 28 1 3 8 1 2 28 1 4 8 8 1 2 28 1 2 28 2 6 28 7 322
Airflow regenerated noise diagram for d/s = /; (based on outlet size B x H = A tot = 1m 2 ) Airflow regenerated noise diagram for d/s = / (based on outlet size B x H = A tot = 1m 2 ) Hz 2Hz Hz Hz 2Hz Hz Hz Lw [db] nivo šumnosti [db] 12Hz 63Hz Hz 12Hz Lw [db] nivo šumnosti [db] 63Hz 3 1 18 brzina zraka v ef [m/s] 3 1 18 brzina zraka v ef [m/s] A tot [m 2 ],2,,7 1 1,2 1, 2 Correction db (A) -6-3 -2 1 2 3 Ordering key: Sound attenuator Splitter width / gap PZ - d / s - B x H x L Dimensions Splitter coverings: V - Glass fibre veil RS - Reflective plate and glass silk PS - Perforated plate and glass silk S - Glass silk RV - Reflective plate and glass fibre veil PV - Perforated plate and glas fibre veil - V Splitter Dimensions Designations as for attenuator PK - d x H x L - O/V 323
ROUND ATTENUATOR - PZC Outer casing is made of galvanised sheet steel, filled with sound absorbing material. Inner duct of the attenuator is made of perforated galvanised sheet steel Options Version with pod PZC b d p x z Ød ØD k L PZC - J b d p x z Ød ØD j k L Flow Attenuator weight Standard ød ø j øk b s area L= L= L=1 diameter [m 2 ] PZC PZC-J PZC PZC-J PZC PZC-J ødpxz 3, 224 23 28 48 7 68 392 4 9,x8,126 2 2 31 44 3 62 76 438 4 9,x8 4,18 6 28 28 3 48 9 68 84 488 4 9,x8,198 7 31 39 2 66 74 93 38 4 9,x8,21 7 3 33 43 7 73 81 4 3 4 9,x12 6,316 8 399 37 49 63 83 89 117 67 3 4 9,x12 7,397 9 4 41 7 94 98 132 7 3 4 9,x12 8,499 46 62 77 6 9 149 8 3 4 9,x16,628 1 1 71 86 1 1 169 9 3 4 9,x16,78 6 6 8 94 136 132 191 41 3 4 9,x16 Ordering key Round attenuator J - attenuator with pod Standard size ød Attenuator length PZC - J - - L 324
Attenuation D e [db] Frequency [Hz] 63 12 2 8 Diameter PZC PZC-J PZC PZC-J PZC PZC-J PZC PZC-J PZC PZC-J PZC PZC-J PZC PZC-J PZC PZC-J Attenuator length: L= 3 2 2 3 4 6 7 11 12 6 23 3 3 1 2 2 3 3 6 12 8 19 21 3 17 2 13 Attenuator length: L= 3 2 3 7 9 11 14 21 24 23 42 12 43 7 39 4 27 2 3 6 8 13 24 19 42 9 41 6 34 4 23 4 2 3 7 9 12 19 23 14 42 7 37 4 28 3 19 2 3 4 6 8 11 18 22 43 4 34 3 23 3 1 3 6 11 21 31 21 14 6 3 6 11 21 36 28 18 13 7 3 32 24 1 11 8 3 19 28 12 2 18 23 1 8 8 2 4 9 17 18 7 Attenuator length: L=1 3 3 3 9 11 14 17 27 31 3 48 19 8 43 6 37 3 4 8 14 16 26 29 1 7 31 4 3 4 7 9 13 1 2 29 22 11 6 36 2 3 4 6 8 12 14 24 28 16 6 4 33 4 19 3 4 8 11 14 23 27 14 49 6 46 4 4 18 6 2 4 4 7 13 21 27 12 48 42 4 26 3 16 7 2 3 4 7 9 13 19 26 47 4 37 3 22 3 1 8 1 3 3 6 8 12 17 2 7 46 3 32 3 17 2 13 3 11 24 4 26 12 11 2 11 23 43 6 9 p [ Pa] 8 7 p [ Pa] 8 Lp [db/m] Standard size Ød Lp [db/m] 3 Standard size Ød 3 4 6 7 8 4 2 1 V [m 3 /h*m]* 6 7 8 2 1 V [m 3 /h*m]* 32
INTERSPACE ATTENUATOR - PZM PZM attenuators are made of galvanised sheet steel, containing sound-absorbing material infill. Dimensions of interspace sound attenuator ØD Ød Standard size ød ød-2 ød 98 Lenghts L 12 123 22 L 1 18 2 198 2 248 3 298 L=,, 1 31 313 41 Standard sizes Insertion loss per meter length prigušenje [db/m] De 12 2 8 f frekvencija [Hz] 8-12-1 1-224- 31-3 Ordering key Interspace Sound Attenuator PZM - - Diameter ød Attenuator length 326
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