LindRekt LindRekt mens rectngulr ventiltion ducts nd fittings. These re mde in oth stndrd nd specil versions. The product rnge lso includes complete, esily used joining system.
Contents LindRekt Generl Duct LKR... 203 Bends LBR... 204 LBXR... 205 S-end LBSR... 206 Tper LDR... 207 Sfe Rect-to-round trnsition LFR... 208 Silencer Collr LTR... 209 LTRSR... 210 T-piece LTROR... 211 Dmper End cover LEPR... 212 Trnsfer isol Rekt Mätdon Dmper LKSR... 213 Clening covers LKCR... 214 IPF... 215 Joining prts LS 1... 216 LS 11... 216 LS 21... 216 LS 31... 216 LS 3... 216 LS 4... 216 LS 5... 216 Silencers LNT... 217 LNTR... 218 LVT... 223 LRLB... 230 200 We reserve the right to mke chnges without prior notice
Generl LindRekt LindRekt consists of rectngulr ducts, fittings nd silencers with dimensions in ccordnce with SS-EN 1505 when not otherwise specified. All fittings nd ducts re mde of hot-dip glvnized sheet steel, Z 275. If higher corrosion protection is needed, lu-zinc or stinless steel cn e used. A joining profile is mounted t the end of every fitting nd duct. Self-tpping screws re only needed on insulted ducts, to fix the insultion rils. The screws re then conceled in the insultion, out of hrm s wy. A coon guide moulding, LS3 nd two sel mouldings, LS31 or LS21 re needed to join components. So precut mouldings nd n dequte length of sel moulding re supplied in ech delivery. Sels re mde from temperture resistnt polythene. Recoended temperture rnge is -70 to +80 C. Support distnces of ducts nd components must never exceed 2400 for ny dimension. Nor my there e more thn one joint etween two supports. Non-stndrd ducts nd duct components cn e tendered on request. Plese enclose dimensioned sketch if possile. Tightness Ducts nd fittings mintin tightness clss C. This only pplies on condition tht the products re instlled in ccordnce with the instlltion instruction. Plese refer to pge 37 38 for more informtion out seling clsses nd offucuk requirements. Strength Stndrd ducts nd duct components cn withstnd positive nd negtive pressures of 1000 P. Lrger ducts nd fittings re reinforced y U-shped profiles nd integrted corner joints. Dimensions nd weights The I dimensions given in the tles re the overll instlltion dimensions of products. The following tolernces pply, depending on duct or fitting dimensions. nd re the internl duct or fitting dimensions. Tolernces for dimensions nd when + < 1200: +0-4 when + > 1200: +0-6 Tolernces for dim. l ±5 The dimension mtrix on pge 202 lso contins weight, cross-section re, circumference nd hydrulic dimeter of ll stndrd dimensions. Hydrulic dimeter d h mens The dimeter of circulr duct which gives the sme pressure drop t the sme ir velocity s in the rectngulr duct. 2 Equivlent dimeter mens The dimeter of circulr duct which gives the sme pressure drop t the sme ir flow s in the rectngulr duct. Insulted ducts Insulted ducts cn e mde in the following designs: Internlly insulted Internlly insulted, cld with solid sheet metl Internlly insulted, cld with perforted sheet metl isol Rekt Mätdon Dmper Silencer Sfe Generl Trnsfer 4 A c d h = -------------- = -------------------- O + We reserve the right to mke chnges without prior notice 201
Generl LindRekt Technicl dt for stndrd sizes 100 150 200 250 300 400 500 600 800 1000 1200 Generl 200 250 5 0.020 0.6 133 6 0.020 0.7 143 6 0.030 0.7 171 6 0.038 0.8 188 6 0.040 0.8 200 7 0.050 0.9 222 m l = Weight, including guide rils, stys nd stiffeners [kg/m] A c = Cross-sectionl re [m2] O = Circumference [m] 4 A c 2 d = -------------- = -------------------- d h = Hydrulic dimeter [] h O + 8 0.063 1.0 250 200 250 Sfe 300 6 0.030 0.8 150 7 0.045 0.9 240 8 0.060 1.0 240 9 0.075 1.1 273 10 0.090 1.2 300 300 Dmper Silencer 400 500 600 8 0.040 1.0 160 9 0.060 1.1 218 10 0.075 1.3 231 12 0.90 1.5 240 10 0.080 1.2 218 11 0.10 1.4 286 13 0.12 1.6 300 10 0.10 1.3 308 12 0.13 1.5 333 14 0.15 1.7 353 11 0.12 1.4 343 13 0.15 1.6 375 14 0.18 1.8 400 13 0.16 1.6 400 14 0.20 1.8 500 16 0.24 2.0 480 16 0.25 2.0 500 17 0.30 2.2 545 19 0.36 2.4 600 400 500 600 Mätdon 800 1000 16 0.16 2.0 320 17 0.20 2.1 381 21 0.25 2.5 400 17 0.24 2.2 436 22 0.30 2.6 462 19 0.32 2.4 533 23 0.40 2.8 571 21 0.40 2.6 615 25 0.50 3.0 667 22 0.48 2.8 686 27 0.60 3.2 750 25 0.64 3.2 800 30 0.80 3.6 889 34 1.00 4.0 1000 800 1000 Rekt 1200 25 0.36 3.0 480 27 0.48 3.2 600 28 0.60 3.4 706 30 0.72 3.6 800 33 0.96 4.0 960 38 1.20 4.4 1091 41 1.44 4.8 1200 1200 isol 1400 31 0.56 3.6 622 33 0.70 3.8 737 34 0.84 4.0 840 37 1.12 4.4 1018 42 1.40 4.8 1167 45 1.68 5.8 1292 1400 Trnsfer 1600 1800 44 0.64 4.0 640 46 0.80 4.2 762 50 0.90 4.6 783 48 0.96 4.4 873 53 1.08 4.8 900 53 1.28 4.8 1067 57 1.44 5.2 1108 58 1.60 5.2 1231 62 1.80 5.6 1286 62 1.92 5.6 1371 67 2.16 6.0 1440 1600 1800 2000 55 1.00 5.0 800 57 1.20 5.2 923 62 1.60 5.6 1143 67 2.00 6.0 1333 72 2.40 6.4 1500 100 150 200 250 300 400 500 600 800 1000 1200 2000 202 We reserve the right to mke chnges without prior notice
Duct LindRekt LKR LKR Dimensions Sfe Trnsfer isol Rekt Mätdon Dmper Silencer Generl L Stright duct, stiffened with trnsverse trpezoid corrugtions, which reduces the risk of noise genertion. Lrger dimensions hve stiffening profiles. Instlltion height of these profiles is 23. When or 1200, stndrd lengths re 2400 or 1250. If or >1200, stndrd length is 1250. lengths cn e ordered. Ducts re normlly supplied with joining profile t ech end, ut cn lso e supplied s flexile piece, where the joining profile on one end is not fixed. Also ville with n end cover fixed y rils. Ordering exmple Product Width in Height in L = 2400 * 1 L = 1250 2 L < 2400 L LS-joint t oth ends 1 LS-joint t one end. Loose joint included. 2 LS-joint t one end. End cover on rils t other end. 3 End cover on rils t oth ends. 4 LS-joint t one end. No loose joint included. 5 LKR 500 300 1 1 * pplies when or 1200. We reserve the right to mke chnges without prior notice 203
Bend LindRekt LBR LBR Dimensions Generl 1 /3 Guide vne t 800 Sfe l 1 2 Silencer Bend with shrp outer corner, stiffened with trpezoid corrugtion. Dmper The end is delivered with 90 or 45 ngles nd joining profile LS t oth ends. leg lengths nd ngles cn lso e ordered. Stndrd design l 1 = l 2 = 125. Mätdon Ordering exmple Product LBR 500 300 500 1 1 1 Rekt isol Width in 1 Height in Width in 2 90 1 45 2 Angle α 125 1 Leg length in l 1 125 1 Leg length in l 2 Trnsfer l 2 1 l 1 2 l 2 204 We reserve the right to mke chnges without prior notice
Bend LindRekt LBXR LBXR Dimensions 1 /3 Guide vne t 800 Generl 2 Sfe Bend with rounded outer corner, stiffened with trpezoid corrugtions. Silencer The end is delivered with 90 or 45 ngles nd joining profiles t oth ends. leg lengths nd ngles cn lso e ordered. Stndrd design l 1 = l 2 = 125. Dmper Ordering exmple Product LBXR 500 300 500 1 1 1 Mätdon Width in 1 Height in Width in 2 90 1 45 2 Angle α 125 1 Leg length in l 1 125 1 Leg length in l 2 Trnsfer Rekt l 2 isol l 1 1 l 1 2 l 2 We reserve the right to mke chnges without prior notice 205
S-end LindRekt LBSR LBSR Dimensions Generl f Sfe Trnsfer isol Rekt Mätdon Dmper Silencer l Used for deflections of the duct system, for exmple where ducts cross. Hs joining profile t oth ends, nd is stiffened y trpezoid corrugtions. A specil reltionship is needed etween the -dimension, fll f nd length l for the LBSR to retin its crosssectionl re nd not restrict the ir flow. For this reson, stndrd lengths nd stndrd drops hve een prepred. Ordering exmple Product Height in Width in Fll in Length in f l LBSR 300 600 300 400 l std f 100 400 300 150 400 300 200 400 300 250 400 300 300 400 300 350 400 300 400 500 400 450 500 400 500 600 400 600 700 400 700 800 500 800 900 500 900 1000 500 1000 1100 500 1100 1200 500 1200 1300 500 1300 1400 500 1400 1500 500 1500 1600 500 1600 1700 500 1800 1900 500 2000 2100 500 206 We reserve the right to mke chnges without prior notice
Tper LindRekt LDR LDR Dimensions d 1 c 2 3 l Generl 4 5 Sfe The tpers re used s trnsitions etween different duct dimensions. The lrger dimensions re ville with offsets s in the coded sketches. 6 h d Silencer Dimension chnges hve joining profile t oth ends, nd re stiffened y trpezoid corrugtions. Mesures e, f, g nd h only need to e given for lterntive 6. Negtive vlues for f, for exmple, men tht f is outside side. Ordering exmple Product Lrge width in Lrge height in Smll width in Smll height in Alterntive displcements seen from LDR 500 300 300 200 1 450 c d the smll end 1 6 Length in l e c f g l std 100 300 150 300 200 300 250 300 300 300 350 300 400 450 450 450 500 450 600 450 700 450 800 600 900 600 1000 600 1100 600 1200 600 1300 600 1400 600 1500 600 1600 600 1800 600 2000 600 Trnsfer isol Rekt Mätdon Dmper We reserve the right to mke chnges without prior notice 207
LindRekt Rect-to-round trnsition LFR LFR Dimensions 1 Ød1 Generl 2 l 3 Sfe 4 5 Trnsfer isol Rekt Mätdon Dmper Silencer Rect-to-round trnsition re used etween rectngulr nd circulr ducts. The rectngulr connection hs joining profile nd the circulr connection hs Sfe sel. The rectngulr connection is ville with offsets s in the coded sketches. Mesures e, f, g nd h only need to e given for lterntive 6. Negtive vlues for f, for exmple, men tht f is outside side. Ordering exmple Product Width in Height in Dimeter in Ød1 Alterntive displcements seen from the circulr side 1 6 Length in l LFR 500 300 160 1 450 e 6 l std 100 300 150 300 200 300 250 300 300 300 350 300 400 450 450 450 500 450 600 450 700 450 800 600 900 600 1000 600 1100 600 1200 600 1300 600 1400 600 1500 600 1600 600 1800 600 2000 600 f h g 208 We reserve the right to mke chnges without prior notice
Collr LindRekt LTR LTR Dimensions Sfe Silencer Dmper Mätdon Rekt Trnsfer isol Generl 125 30 The collr is used for connection to rectngulr duct. The smller joint end is provided with joining profile. The lrger one hs n edge, for fixing with lind rivets or self-tpping screws, ut cn lso e given folding t to fcilitte ssemly. Ordering exmple Product Width in Height in Length in Option Fixing with folding t LTR 500 300 125 v We reserve the right to mke chnges without prior notice 209
LindRekt Collr on circulr duct LTRSR LTRSR Dimensions Silencer Dmper Mätdon Rekt Trnsfer isol Sfe Generl 125 Ød 30 30 The collr is used for connection to circulr duct. The rectngulr end is provided with joining profile. The rounded end hs n edge, for fixing with lind rivets or self-tpping screws. lengths cn lso e supplied. Ordering exmple Product Width in Height in Dimeter in Ød Length in LTRSR 600 300 400 125 210 We reserve the right to mke chnges without prior notice
T-piece LindRekt LTROR LTROR Dimensions Sfe Silencer Dmper Mätdon Rekt Trnsfer l 3 1 2 Generl isol l 1 l 2 3 A T-piece which is provided with joining profiles nd is stiffened with trpezoid corrugtions. Stndrd design l 1 = l 2 = l 3 = 125. leg lengths cn lso e supplied. Ordering exmple Product Width in 1 Width in 2 Width in 3 Height in 125 1 Leg length in l 1 125 1 Leg length in l 2 125 1 Leg length in l 3 LTROR 600 600 800 400 1 1 1 We reserve the right to mke chnges without prior notice 211
End cover LindRekt LEPR LEPR Dimensions Sfe Silencer Dmper Trnsfer Mätdon isol Rekt Generl Used s n end cover in ducts or s su-component in dimension chnges together with collr LTR. The edges re folded down ll round, to suit slide moulding. The end cover is stiffened with trpezoid corrugtions. Ordering exmple Product Width in Height in LEPR 500 300 212 We reserve the right to mke chnges without prior notice
Dmper LindRekt LKSR LKSR Dimensions Generl 2 +5 Sfe Rekt Mätdon Dmper Silencer l isol Trnsfer Regulting dmper Consists of duct with trpezoid corrugtions nd rotting lde. Blde ngle cn e djusted from 0 90 using the kno in the cup, nd lde ngle is red from n emossed scle on the edge of the cup. Locking is done y two Pozidriv screws (PZD2). Plese refer to pge 140 for generl informtion out dmpers. The dmper is provided with joining profile t ech end. The length is normlly + 10, ut the dmper cn lso e ordered in specil lengths. The cup llows n insultion thickness of 50. If thicker insultion is needed, dd the specil insultion cup IK to the dmper. Plese refer to pge 163 for generl informtion out ccessories. Ordering exmple Product Width in Height in Norml length in l=+10 1 LKSR 500 300 1 We reserve the right to mke chnges without prior notice 213
LindRekt Clening cover LKCR LKCR Dimensions Generl 1 45 45 80 Sfe Non-insulted duct Mätdon Dmper Silencer The clening cover is lso used s n inspection htch for rectngulr ducts. To the clening cover elongs fixing frme, which is fixed to the rectngulr duct. This is normlly fixed with lind rivets through the foldeddown edge of the fixing frme. It cn lso e provided with folding ts on request. It is esy to remove the clening cover from the fixing frme y using over-centre ctches. In the insulted version, its inner side will lwys e in level with the innermost oundry line of the duct, irrespective of whether the duct is lined internlly or externlly. 2 The cover should not e plced closer thn 50 from the nerest side of the rectngulr duct. Rekt More informtion out clening covers is ville on pge 107. Ordering exmple Trnsfer isol Product Width in Height in Non-insulted duct 1 Internlly insulted duct 2 Externlly insulted duct 3 Insultion 30 30 Insultion 50 50 Insultion 100 100 Option Fixing with folding ts LKCR 500 300 2 50 v Internlly insulted duct 3 Externlly insulted duct 80 214 We reserve the right to mke chnges without prior notice
LindRekt Clening cover IPF IPF Dimensions Silencer Dmper Mätdon Trnsfer isol Rekt h Sfe Generl Clening cover without fixing frme. Esy to instll nd remove. Ordering exmple Product Width in Height in IPF 300 200 nd = hole dimensions. h 300 200 50 400 300 50 500 400 70 We reserve the right to mke chnges without prior notice 215
LindRekt Joining prts LS Rekt Mätdon Dmper Silencer Sfe Generl LS 1 Joining profile Joining profile designed to e fixed to the duct y emossing with specil pincers. It is seled to the duct y specil fctory-pplied sem putty. Profile height is pp. 20. Normlly supplied in 5 m lengths. Weight: 0.40 kg/m LS 11 Joining profile Joining profile designed to e spot welded to the duct. It is seled to the duct y specil fctory-pplied sem putty. Profile height is pp. 20. Normlly supplied in 5 m lengths. Weight: 0.47 kg/m LS 21 Sel moulding The sel moulding is intended to e instlled in ech joining profile. Mde from polythene fom. Supplied in 10 m coils. LS 3 - Slide profile Used to join two ducts or fittings which oth hve joining profiles. Normlly supplied in 5 m lengths. Weight: 0.20 kg/m LS 4 Inner corner Used to keep the sel moulding in plce nd give the ventiltion duct stiffness nd stility. LS 5 Outer corner Used outside the slide profile to protect the sel moulding nd stiffen the joint. Gives net finish. joining methods If you do not wnt to fix ducts or duct components together with slide mouldings, s descried ove, we cn meet your needs. You must then specify the prticulr method of joining you wnt, in plin lnguge. For exmple: lind rivet edge 25, flt r flnge to prticulr stndrd, or equivlent. isol Trnsfer LS 31 Sel moulding The sel moulding is intended to e instlled in ech joining profile. Mde from polythene fom. Included s stndrd with ll orders. Supplied in 250 m crtons. 216 We reserve the right to mke chnges without prior notice
LindRekt Stright silencer LNT LNT Dimensions t Generl Trnsfer isol Rekt Mätdon Dmper Silencer Sfe The stright, rectngulr silencer consists of n outer, trpezoid corrugted shell. The corrugtions give good stility t the sme time s they cut the risk of resonnce. There re numer of ffles of vrying thickness nd spcing inside the silencer. The ffle surfce is covered with cloth to prevent fire loss. The cloth cn e clened with rotting plstic rush. The ffle inlet ends re designed to reduce pressure drop nd internl sound genertion. The silencer is provided with joining profile t ech end. The ends cn lso e fitted with flt r or ngle iron flnges. Stndrd sizes Plese refer to the tle on pge 220 222. Mde in heights of up to 2400. Plese contct Lind for other dimensions. informtion Clening covers cn e instlled s necessry. Plese contct Lind for informtion out product weights. Access to our own sound lortory llows us to optimise customer specific solutions. l Ordering exmple Product Width in Height in Bffle thickness t Bffle distnce Length in l LNT 1400 1000 200 / 150 1250 We reserve the right to mke chnges without prior notice 217
LindRekt Stright, clenle silencer LNTR LNTR Dimensions t Generl Trnsfer isol Rekt Mätdon Dmper Silencer l Sfe The stright, rectngulr silencer consists of n outer, trpezoid corrugted shell, nd cn e clened. The corrugtions give good stility t the sme time s they cut the risk of resonnce. There re numer of ffles of vrying thickness nd spcing inside the duct. The ffle surfce is covered with cloth to prevent fire loss. The cloth cn e clened with rotting plstic rush. The ffle inlet ends re designed to reduce pressure drop nd internl sound genertion. The silencer is provided with joining profile t ech end. The ends cn lso e fitted with flt r or ngle iron flnges. The silencer cn e opened for ffle removl. The ffle frme is esy to remove when the ffle insultion is chnged. New insultion is then cut nd inserted into the frme, which is re-instlled. The only thing which needs to e thrown wy is the used insultion. Stndrd sizes Plese refer to the tle on pge 220 221. LNTR is mde in dimensions nd, mx 1200 nd length mx 1250. Plese contct Lind for other dimensions. Ordering exmple Product Width in Height in Bffle thickness Bffle distnce Length in LNTR 1000 800 200 / 200 1250 2 t l Bffles re removed verticlly upwrds 1 Bffles re removed horizontlly to one side 2 Bffles re removed verticlly dowwrds 3 218 We reserve the right to mke chnges without prior notice
LindRekt Stright silencers LNT, LNTR Dimensioning Clcultion schedule Exmple (mrked in grphs nd tles) 1 Enter the ttenution vlue tles on pges 220 222. Look for the relevnt width nd compre the ttenution vlues shown for vrious silencers. Select the product which meets your needs. Red off the vlues for numer of ffles nd free width. 2 Clculte the free flow re y multiplying the free width with the height of the silencer in metres. The free flow re, comined with the given ir flow, cn e used to find the specific pressure drop from grph A on pge 228. Multiply this y the length to get the pressure drop of the product. Also red off the ir velocity vlues. 3 Clculte the preliminry sound level downstrem the silencer y reducing the sound level upstrem the silencer y the ttenution vlue in the tles on pges 220 222. 4 Clculte the self-generted noise from the ir velocity in grph B, pge 229. Then correct the relevnt vlue for height (tle C) nd numer of ffles used (tle D). 5 Clculte the sound level downstrem the silencer y compring the preliminry downstrem sound level with the self-generted noise. If the difference is >8, no ddition is needed. If the difference is less, dd the vlues red from the X-xis in grph E, pge 229 to compenste for the self-generted noise. Wnted Given Determined Vlue red Clculted Vlue red Clculted Vlue red Clculted Vlue red Clculted A stright silencer of width = 1400 which ttenutes 15 db in the 125 Hz nd. Height = 1000. Air flow = 4 m 3 /s. Sound level efore silencer in 125 Hz nd = 85 db. Width: 1400 Bffle thickness 200, distnce etween ffles 150 nd length 1850 gives ttenution of 16 db with 4 ffles nd free width of 0.6 m. Free flow re: 1m 0.6 m = 0.6 m 2. Specific pressure drop: 17 P/m Pressure drop: 17 P/m 1.85 m = 31.45 P Air velocity: 7 m/s Preliminry sound level fter dmper: 85 db - 16 db = 69 db Preliminry self-generted noise: 28 db Self-generted noise: 28 db + 0 db (correction height) + 6 db (correction no. of ffles) = 34 db Difference >8 db, which does not give ny ddition Sound level fter dmper: 69 db + 0 db = 69 db Rekt Mätdon Dmper Silencer Sfe Generl Trnsfer isol We reserve the right to mke chnges without prior notice 219
LindRekt Stright silencers LNT, LNTR Trnsfer isol Rekt Mätdon Dmper Silencer Sfe Generl Attenution vlues for stright silencers of types LNT, LNTR Width 400 Bffle thickn. Bffle spcing Length Attenution in db for centre frequency Hz No. of ffles Free width m 63 125 250 500 1000 2000 4000 100 100 650 2 3 9 18 24 22 13 2 0.2 200 200 650 3 4 9 15 16 12 7 1 0.2 100 100 1250 4 6 17 34 45 42 25 2 0.2 * 280 40 650 5 7 14 23 27 21 11 2 0.12 200 200 1250 6 9 18 30 32 23 13 1 0.2 100 100 1850 6 9 25 50 50 50 37 2 0.2 * 280 40 1250 7 12 24 36 40 34 18 2 0.12 200 200 1850 9 13 26 44 47 34 19 1 0.2 * 280 40 1850 11 17 31 45 48 44 30 2 0.12 100 50 650 3 4 11 20 28 24 18 3 0.15 450 100 50 1250 5 7 21 39 50 46 34 3 0.15 100 50 1850 7 11 31 50 50 50 50 3 0.15 * 350 50 650 4 7 13 21 25 19 11 2 0.15 200 50 650 5 8 14 23 28 20 12 2 0.1 500 * 350 50 1250 8 13 25 39 46 33 19 2 0.15 200 50 1250 10 15 27 45 50 39 24 2 0.1 * 350 50 1850 11 19 33 46 46 46 33 2 0.15 200 50 1850 15 22 40 50 50 50 35 2 0.1 100 100 650 2 3 9 18 24 22 13 3 0.3 100 50 650 3 4 11 20 28 24 18 4 0.2 100 100 1250 4 6 17 34 45 42 25 3 0.3 200 100 650 5 7 14 22 25 19 12 2 0.2 600 100 50 1250 5 7 21 39 50 46 34 4 0.2 100 100 1850 6 9 25 50 50 50 37 3 0.3 100 50 1850 7 11 31 50 50 50 50 4 0.2 200 100 1250 9 13 26 42 49 37 23 2 0.2 200 100 1850 14 20 39 50 50 50 34 2 0.2 200 150 650 4 6 11 18 21 15 9 2 0.3 * 500 100 650 5 7 13 21 24 18 11 2 0.2 700 200 150 1250 7 11 21 34 41 30 18 2 0.3 * 500 100 1250 8 13 25 39 46 35 22 2 0.2 200 150 1850 10 16 31 50 50 44 26 2 0.3 * 500 100 1850 12 20 35 48 48 48 32 2 0.2 100 50 650 3 4 11 20 28 24 18 5 0.25 100 50 1250 5 7 21 39 50 46 34 5 0.25 750 200 50 650 5 8 14 23 28 20 12 3 0.15 100 50 1850 7 11 31 50 50 50 50 5 0.25 200 50 1250 10 15 27 45 50 39 24 3 0.15 200 50 1850 15 22 40 50 50 50 35 3 0.15 100 100 650 2 3 9 18 24 22 13 4 0.4 200 200 650 3 4 9 15 16 12 7 2 0.4 100 100 1250 4 6 17 34 45 42 25 4 0.4 200 67 650 5 8 15 24 28 21 13 3 0.2 800 200 200 1250 6 9 18 30 32 23 13 2 0.4 100 100 1850 6 9 25 50 50 50 37 4 0.4 200 200 1850 9 13 26 44 47 34 19 2 0.4 200 67 1250 10 15 28 45 46 39 24 3 0.2 200 67 1850 14 21 40 50 50 50 35 3 0.2 * Totl ffle thickness. 220 We reserve the right to mke chnges without prior notice
LindRekt Stright silencers LNT, LNTR Width 900 1000 1050 1200 1250 1400 Bffle thickn. Bffle spcing Length Attenution in db for centre frequency Hz No. of ffles Free width 63 125 250 500 1000 2000 4000 m 100 50 650 3 4 11 20 28 24 18 6 0.3 200 100 650 5 7 14 22 25 19 12 3 0.3 100 50 1250 5 7 21 39 50 46 34 6 0.3 100 50 1850 7 11 31 50 50 50 50 6 0.3 200 100 1250 9 13 26 42 49 37 23 3 0.3 200 100 1850 14 20 39 50 50 50 34 3 0.3 100 100 650 2 3 9 18 24 22 13 5 0.5 100 100 1250 4 6 17 34 45 42 25 5 0.5 200 50 650 5 8 14 23 28 20 12 4 0.2 100 100 1850 6 9 25 50 50 50 37 5 0.5 100 100 2450 7 12 33 50 50 50 50 5 0.5 200 50 1250 10 15 27 45 50 39 24 4 0.2 200 50 1850 15 22 40 50 50 50 35 4 0.2 200 50 2450 20 29 50 50 50 50 47 4 0.2 100 50 650 3 4 11 20 28 24 18 7 0.35 200 150 650 4 6 11 18 21 15 9 3 0.45 100 50 1250 5 7 21 39 50 46 34 7 0.35 200 150 1250 7 11 21 34 41 30 18 3 0.45 100 50 1850 7 11 31 50 50 50 50 7 0.35 100 50 2450 10 14 41 50 50 50 50 7 0.35 200 150 1850 10 16 31 50 50 44 26 3 0.45 200 150 2450 14 21 41 50 50 50 35 3 0.45 100 100 650 2 3 9 18 24 22 13 6 0.6 200 200 650 3 4 9 15 16 12 7 3 0.6 100 50 650 3 4 11 20 28 24 18 8 0.4 100 100 1250 4 6 17 34 45 42 25 6 0.6 200 100 650 5 7 14 22 25 19 12 4 0.4 100 50 1250 5 7 21 39 50 46 34 8 0.4 200 200 1250 6 9 18 30 32 23 13 3 0.6 100 100 1850 6 9 25 50 50 50 37 6 0.6 100 50 1850 7 11 31 50 50 50 50 8 0.4 100 100 2450 7 12 33 50 50 50 50 6 0.6 200 100 1250 9 13 26 42 49 37 23 4 0.4 200 200 1850 9 13 26 44 47 34 19 3 0.6 100 50 2450 10 14 41 50 50 50 50 8 0.4 200 200 2450 11 17 34 50 50 44 25 3 0.6 200 100 1850 14 20 39 50 50 50 34 4 0.4 200 100 2450 18 26 50 50 50 50 50 4 0.4 200 50 1250 10 15 27 45 50 39 24 5 0.25 200 50 1850 15 22 40 50 50 50 35 5 0.25 200 50 2450 20 29 50 50 50 50 47 5 0.25 100 100 1250 4 6 17 34 45 42 25 7 0.7 100 100 1850 6 9 25 50 50 50 37 7 0.7 200 150 1250 7 11 21 34 41 30 18 4 0.6 100 100 2450 7 12 33 50 50 50 50 7 0.7 200 150 1850 10 16 31 50 50 44 26 4 0.6 200 150 2450 14 21 41 50 50 50 35 4 0.6 Trnsfer isol Rekt Mätdon Dmper Silencer Sfe Generl We reserve the right to mke chnges without prior notice 221
LindRekt Stright silencers LNT Trnsfer isol Rekt Mätdon Dmper Silencer Sfe Generl Width 1500 1600 1750 1800 2000 2100 2400 Bffle thickn. Bffle spcing Length Attenution in db for centre frequency Hz No. of ffles Free width 63 125 250 500 1000 2000 4000 m 200 100 1250 9 13 26 42 49 37 23 5 0.5 200 50 1250 10 15 27 45 50 39 24 6 0.3 200 100 1850 14 20 39 50 50 50 34 5 0.5 200 50 1850 15 22 40 50 50 50 35 6 0.3 200 100 2450 18 26 50 50 50 50 50 5 0.5 200 50 2450 20 29 50 50 50 50 47 6 0.3 100 100 1250 4 6 17 34 45 42 25 8 0.8 200 200 1250 6 9 18 30 32 23 13 4 0.8 100 100 1850 6 9 25 50 50 50 37 8 0.8 100 100 2450 7 11 21 34 41 30 18 8 0.8 200 200 1850 9 13 26 44 47 34 19 4 0.8 200 67 1250 10 15 28 45 46 39 24 6 0.4 200 200 2450 11 17 34 50 50 44 25 4 0.8 200 67 1850 14 21 40 50 50 50 35 6 0.4 200 67 2450 16 25 48 50 40 50 41 6 0.4 200 150 1250 7 11 21 34 41 30 18 5 0.75 200 50 1250 10 15 27 45 50 39 24 7 0.35 200 150 1850 10 16 31 50 50 44 26 5 0.75 200 150 2450 14 21 41 50 50 50 35 5 0.75 200 50 1850 15 22 40 50 50 50 35 7 0.35 200 50 2450 20 29 50 50 50 50 47 7 0.35 200 100 1250 9 13 26 42 49 37 23 6 0.6 200 100 1850 14 20 39 50 50 50 34 6 0.6 200 100 2450 18 26 50 50 50 50 50 6 0.6 200 200 1250 6 9 18 30 32 23 13 5 1 200 200 1850 9 13 26 44 47 34 19 5 1 200 50 1250 10 15 27 45 50 39 24 8 0.4 200 200 2450 11 17 34 50 50 44 25 5 1 200 50 1850 15 22 40 50 50 50 35 8 0.4 200 50 2450 20 29 50 50 50 50 47 8 0.4 200 150 1250 7 11 21 34 41 30 18 6 0.9 200 100 1250 9 13 26 42 49 37 23 7 0.7 200 150 1850 10 16 31 50 50 44 26 6 0.9 200 100 1850 14 20 39 50 50 50 34 7 0.7 200 150 2450 14 21 41 50 50 50 35 6 0.9 200 100 2450 18 26 50 50 50 50 50 7 0.7 200 200 1250 6 9 18 30 32 23 13 6 1.2 200 100 1250 9 13 26 42 49 37 23 8 0.8 200 200 1850 9 13 26 44 47 34 19 6 1.2 200 200 2450 11 17 34 50 50 44 25 6 1.2 200 100 1850 14 20 39 50 50 50 34 8 0.8 200 100 2450 18 26 50 50 50 50 50 8 0.8 222 We reserve the right to mke chnges without prior notice
LindRekt Angled silencer LVT LVT Dimensions Verticl mounting Horizontl mounting t t Generl Sfe The silencer hs n outer, trpezoid corrugted shell. There re numer of ffles of vrying thickness nd spcing inside the silencer. The ffle surfce is covered with cloth to prevent fire loss. The cloth cn e clened with rotting plstic rush. The ffle inlet nd outlet ends re squred off, to permit the silencer to e instlled together with the squre end of nother silencer. The ffles cn lso e specified with rounded ends. The silencer is provided with joining profile t ech end. The ends cn lso e fitted with flt r or ngle iron flnges. Stndrd sizes Plese refer to the tles on pges 225 227. Stndrd design l 1 = l 2. Mde in heights of up to 2400. Plese contct Lind for other dimensions nd other l 1 nd l 2 mesures. Ordering exmple Product Width in Height in Bffle thickness t Bffle distnce Length in l 1 Length in l 2 LVT 1400 1000 200 / 150 150 150 Trnsfer isol Rekt Mätdon Dmper Silencer Centre-line Centre-length = + l 1 + l 2 l2 l1 We reserve the right to mke chnges without prior notice 223
LindRekt Angled silencer LVT Rekt Mätdon Dmper Silencer Sfe Generl Dimensioning Clcultion schedule Exmple (mrked in grphs nd tles) 1 Enter the ttenution vlue tles on pges 225 227. Look for the relevnt width nd compre the ttenution vlues shown for vrious silencers. Select the product which meets your needs. Red off the vlues for numer of ffles nd free width. 2 Clculte the free flow re y multiplying the free width y the height of the silencer in metres. The free flow re, comined with the given ir flow, cn e used to find the specific pressure drop from grph A on pge 228. For ngled silencers, the specific pressure drop is 1.5 times higher thn shown in the grph. Multiply this y the centre-line length to get the pressure drop of the product. Also red off the ir velocity vlues. 3 Clculte the preliminry sound level downstrem the silencer y reducing the sound level upstrem the silencer y the ttenution vlue in the tles on pges 225 227. 4 Clculte the self-generted noise from the ir velocity in grph B, pge 229. Then correct the relevnt vlue for height (tle C) nd numer of ffles used (tle D). 5 Clculte the sound level downstrem the silencer y compring the preliminry downstrem sound level with the self-generted noise. If the difference is >8, no ddition is needed. If the difference is less, dd the vlues red from the X-xis in grph E, pge 229 to compenste for the self-generted noise. Wnted Given Determined Vlue red Clculted Vlue red Clculted Vlue red Clculted Vlue red Vlue red Clculted An ngled silencer of width = 1400 which ttenutes 24 db in the 125 Hz nd. Height = 1000. Air flow = 4 m 3 /s. Sound level efore silencer in 125 Hz nd = 65 db. Width: 1400 Bffle thickness 200, distnce etween ffles 150 nd l 1 + l 2 = 300 gives ttenution of 24 db with 4 ffles nd free width of 0.6 m. Free flow re: 1m 0.6 m = 0.6 m 2. Specific pressure drop: 17 P/m x 1.5 = 25.5 P/m Length: Width + l 1 + l 2 = 1.7 m Pressure drop: 25.5 P/m 1.7 m = 43.4 P Air velocity: 7 m/s Preliminry sound level fter dmper: 65 db - 24 db = 41dB Preliminry self-generted noise: 28 db Self-generted noise: 28 db + 0 db (correction height) + 6 db (correction no. of ffles) = 34 db Difference = 41 db - 34 db = 7 db Addition = 0.8 db Sound level fter dmper: 41 db + 0.8 db = 41.8 db Trnsfer isol 224 We reserve the right to mke chnges without prior notice
LindRekt Angled silencer LVT Attenution vlues for ngled silencer of type LVT Width 400 450 500 600 700 750 Bffle thickn. Bffle spcing Length Attenution in db for centre frequency Hz 63 125 250 500 1000 2000 4000 No. of ffles Free width m 100 100 300 6 7 14 24 30 28 19 2 0.2 200 200 300 7 9 15 22 23 18 12 1 0.2 100 100 600 7 9 18 32 41 38 25 2 0.2 100 100 900 8 10 22 41 50 48 31 2 0.2 200 200 600 9 11 19 29 30 23 15 1 0.2 * 280 40 300 9 11 19 28 33 28 19 2 0.12 200 200 900 10 13 23 36 38 29 18 1 0.2 * 280 40 600 10 14 25 34 38 33 20 2 0.12 * 280 40 900 12 17 30 42 46 40 24 2 0.12 100 50 300 7 8 17 29 37 32 25 3 0.15 100 50 600 8 10 22 38 50 43 34 3 0.15 100 50 900 9 12 27 47 50 50 42 3 0.15 * 350 50 300 9 12 21 32 36 29 19 2 0.15 200 50 300 10 13 22 34 39 30 20 2 0.1 * 350 50 600 11 15 27 38 46 33 22 2 0.15 200 50 600 13 17 29 44 50 39 26 2 0.1 * 350 50 900 13 18 29 40 40 38 30 2 0.15 200 50 900 15 21 36 50 50 49 32 2 0.1 100 100 300 9 11 18 30 38 35 22 3 0.3 100 50 300 10 12 21 33 44 38 28 4 0.2 100 100 600 10 13 22 38 48 45 28 3 0.3 100 50 600 11 14 26 43 50 49 32 4 0.2 100 100 900 11 14 26 46 50 50 34 3 0.3 100 50 900 12 16 31 50 50 50 45 4 0.2 200 100 300 13 17 25 35 40 31 20 2 0.2 200 100 600 15 20 31 45 50 40 26 2 0.2 200 100 900 17 23 37 50 50 49 31 2 0.2 200 150 300 12 16 23 32 37 29 18 2 0.3 * 500 100 300 13 17 25 36 41 32 22 2 0.2 200 150 600 13 18 28 40 47 36 23 2 0.3 * 500 100 600 14 20 32 45 50 41 27 2 0.2 200 150 900 15 21 33 48 50 43 27 2 0.3 * 500 100 900 16 24 36 50 50 46 32 2 0.2 * Totl ffle thickness. 100 50 300 10 13 23 38 50 43 33 5 0.25 100 50 600 11 15 28 47 50 50 41 5 0.25 100 50 900 12 17 33 50 50 50 49 5 0.25 200 50 300 14 19 29 42 49 38 24 3 0.15 200 50 600 17 23 35 50 50 47 30 3 0.15 200 50 900 19 26 42 50 50 50 36 3 0.15 Trnsfer isol Rekt Mätdon Dmper Silencer Sfe Generl We reserve the right to mke chnges without prior notice 225
LindRekt Angled silencer LVT Trnsfer isol Rekt Mätdon Dmper Silencer Sfe Generl Width 800 900 1000 1050 1200 1250 1400 Bffle thickn. Bffle spcing Length Attenution in db for centre frequency Hz 63 125 250 500 1000 2000 4000 No. of ffles Free width m 100 100 300 9 12 21 35 45 42 26 4 0.4 100 100 600 10 14 25 43 50 50 32 4 0.4 200 200 300 11 15 21 31 33 25 15 2 0.4 100 100 900 11 15 29 50 50 50 38 4 0.4 200 200 600 13 17 26 38 41 30 18 2 0.4 200 200 900 14 19 30 45 48 36 21 2 0.4 200 67 300 14 20 30 45 46 39 25 3 0.2 200 67 600 18 25 38 50 50 48 31 3 0.2 200 67 900 20 26 40 50 50 48 37 3 0.2 100 50 300 13 16 27 43 50 48 37 6 0.3 100 50 600 14 18 32 50 50 50 45 6 0.3 100 50 900 15 20 37 50 50 50 50 6 0.3 200 100 300 17 22 32 45 50 39 26 3 0.3 200 100 600 19 25 38 50 50 48 31 3 0.3 200 100 900 21 28 44 50 50 50 37 3 0.3 100 100 300 12 15 24 41 50 47 30 5 0.5 100 100 600 13 17 28 49 50 50 36 5 0.5 100 100 900 14 18 32 50 50 50 42 5 0.5 200 50 300 18 24 35 50 50 45 29 4 0.2 200 50 600 21 28 42 50 50 50 35 4 0.2 200 50 900 23 31 48 50 50 50 40 4 0.2 100 50 300 13 17 29 47 50 50 41 7 0.35 100 50 600 14 19 34 50 50 50 49 7 0.35 100 50 900 16 20 39 50 50 50 50 7 0.35 200 150 300 16 21 30 41 49 36 23 3 0.45 200 150 600 17 23 35 50 50 43 28 3 0.45 200 150 900 19 26 40 50 50 50 32 3 0.45 100 100 300 13 16 27 46 50 50 34 6 0.6 100 100 600 13 18 31 50 50 50 40 6 0.6 100 50 300 14 18 32 50 50 50 45 8 0.4 200 200 300 15 19 28 41 43 31 19 3 0.6 100 100 900 14 19 35 50 50 50 47 6 0.6 100 50 600 15 20 37 50 50 50 50 8 0.4 200 200 600 16 21 32 48 50 37 22 3 0.6 100 50 900 16 21 42 50 50 50 50 8 0.4 200 200 900 18 23 36 50 50 42 25 3 0.6 200 100 300 19 25 38 50 50 48 31 4 0.4 200 100 600 21 28 44 50 50 50 37 4 0.4 200 100 900 24 32 50 50 50 50 42 4 0.4 200 50 300 21 27 42 50 50 50 35 5 0.25 200 50 600 24 31 48 50 50 50 40 5 0.25 100 100 300 14 17 31 50 50 50 39 7 0.7 100 100 600 15 19 35 50 50 50 45 7 0.7 200 150 300 19 24 36 50 50 45 29 4 0.6 200 150 600 20 26 41 50 50 50 34 4 0.6 226 We reserve the right to mke chnges without prior notice
LindRekt Angled silencer LVT Width 1500 1600 1750 1800 2000 Bffle thickn. Bffle spcing Length Attenution in db for centre frequency Hz 63 125 250 500 1000 2000 4000 No. of ffles Free width m 200 100 300 22 28 45 50 50 50 38 5 0.5 200 50 300 23 30 47 50 50 50 39 6 0.3 200 100 600 25 32 50 50 50 50 43 5 0.5 200 50 600 26 34 50 50 50 50 45 6 0.3 100 100 300 15 18 33 50 50 50 43 8 0.8 100 100 600 16 20 37 50 50 50 50 8 0.8 200 200 300 18 22 35 50 50 39 24 4 0.8 200 200 600 19 24 39 50 50 45 27 4 0.8 200 67 300 23 31 48 50 50 50 41 6 0.4 200 67 600 25 33 50 50 50 50 44 6 0.4 200 150 300 20 27 42 50 50 50 34 5 0.75 200 150 600 22 29 47 50 50 50 39 5 0.75 200 50 300 25 33 50 50 50 50 44 7 0.35 200 50 600 28 37 50 50 50 50 50 7 0.35 200 100 300 25 32 50 50 50 50 43 6 0.6 200 100 600 27 35 50 50 50 50 49 6 0.6 200 200 300 20 25 40 50 50 47 28 5 1 200 50 300 27 36 50 50 50 50 49 8 0.4 Dmper Silencer Sfe Generl Trnsfer isol Rekt Mätdon We reserve the right to mke chnges without prior notice 227
LindRekt Silencers LNT, LNTR, LVT Dimensioning Grph A Generl [P/m] Air velocity v 2 4 6 8 10 20 30 [m/s] 500 Silencer Sfe Specific totl pressure drop p t 200 100 50 20 Pressure drop curves for intermedite comintions of ffles to e interpolted. isol Rekt Mätdon Dmper Free ir-flow re through silencer [m 2 ] 4 2 1 0,5 0,2 0,1 10 5 200/100 200/150 200/50 100/50 200/200, 100/100 Trnsfer 0,05 200 500 1000 2 000 5 000 10 000 500 00 100 000 [l/s] 500 1 000 5 000 10 000 50 000 100 000 500 000 [m 3 /h] Air flow q 228 We reserve the right to mke chnges without prior notice
Silencers LindRekt LNT, LNTR, LVT Dimensioning Grph B Self-generted noise [db] 60 50 40 30 20 10 Tle C Correction for height Height [] 400 600 800 1000 1200 1400 1600 1800 2000 Correction -3-2 -1 0 +1 +2 +3 +4 +5 [db] Tle D Correction for no. of ffles No. of ffles [pcs] Correction [db] Grph E 0 1 2 3 4 5 10 15 20 30 [m/s] Air velocity v Logrithmic ddition [db] 3 Centre frequency [Hz] 2 3 4 5 6 7 8 +3 +5 +6 +7 +8 +8 +9 63 125 500 1000 250 2000 4000 Rekt Mätdon Dmper Silencer Sfe Generl Increse to dd to the highest db-vlue 2 1 0 0 5 8 10 15 20 [db] Difference in db-vlues to e dded isol Trnsfer We reserve the right to mke chnges without prior notice 229
LindRekt Low silencer LRLB LRLB Dimensions Generl l Silencer Sfe Dmper Rectngulr silencer with low instlltion dimensions. Insultion with surfce cover which cn e clened with rotting rush. The silencer is provided with joining profile t ech end. Ordering exmple Product Width in Height in Length in l LRLB 600 200 950 Trnsfer isol Rekt Mätdon Attenution Width Height 150 1000 150 200 1000 200 250 1000 250 300 1000 300 350 1000 350 400 1000 400 Length l 63 Hz 125 Hz 250 Hz Sttic ttenution in db 500 Hz 1000 Hz 2000 Hz 4000 Hz 650 7 7 15 19 20 17 16 14 950 8 9 21 28 30 28 23 19 1250 9 12 26 35 40 37 29 22 650 9 6 11 13 15 14 12 12 950 10 9 16 21 23 20 15 14 1250 11 11 20 28 31 26 17 15 650 10 8 10 13 12 11 10 9 950 11 10 15 19 18 15 12 11 1250 12 12 19 25 22 18 14 12 650 8 8 11 15 12 13 11 10 950 10 10 15 19 17 19 15 13 1250 12 13 18 23 21 22 17 15 650 9 7 7 11 10 9 8 7 950 10 9 10 14 13 11 9 8 1250 11 11 13 18 17 14 10 9 650 5 6 6 10 12 14 12 11 950 6 8 9 15 19 20 15 12 1250 8 10 12 20 25 24 17 14 8000 Hz 230 We reserve the right to mke chnges without prior notice
LindRekt Low silencer LRLB Technicl dt Height 150 50 350 150 400 150 500 150 600 150 Width height 800 150 1000 150 Specific pressure drop [P/m] 40 30 20 Generl Sfe Specific pressure drop [P/m] 10 100 Height 200 50 40 30 20 200 300 400 500 1000 2000 Flow [l/s] 250 200 300 200 350 200 400 200 500 200 600 200 Width height 800 200 1000 200 Silencer Dmper Mätdon 10 100 200 300 400 500 1000 2000 Flow [l/s] Rekt Specific pressure drop [P/m] Height 250 50 40 30 20 250 250 300 250 350 250 400 250 500 250 Width height 600 250 800 250 1000 250 isol Trnsfer 10 100 200 300 400 500 1000 2000 Flow [l/s] We reserve the right to mke chnges without prior notice 231
LindRekt Low silencer LRLB Technicl dt Height 300 50 300 300 350 300 400 300 Width height 500 300 600 300 800 300 1000 300 Generl Sfe Specific pressure drop [P/m] 40 30 20 Rekt Mätdon Dmper Silencer Specific pressure drop [P/m] 10 100 200 300 400 500 1000 2000 Flow [l/s] Height 350 50 40 30 20 350 350 400 350 500 350 Width height 600 350 800 350 1000 350 10 100 200 300 400 500 1000 2000 Flow [l/s] isol Trnsfer Height 400 Specific pressure drop [P/m] 50 40 30 20 Width height 400 400 500 400 600 400 800 400 1000 400 10 100 200 300 400 500 1000 2000 Flow [l/s] 232 We reserve the right to mke chnges without prior notice