Document 6bpvBmEJ7eax0KK3Yaywvw1KR

Fans, Etc. lersh Brothers Company Fans, Etc. Hersh Brothers Company Allentown, Penna. LEHIGH MULTIBLADE FANS--TYPE "M" FOR USE IN HEATING AND FENTILATING iCOMMENDED OPERATING CONDITIONS, 70" F., 29.92" BAR s a = `2 i .3 a > K" STATIC PR. H" STATIC PR. H" STATIC PR. H"'STATIC PR. K" STATIC PR. s Total Pres.. ..356" Total Pres... 507" Total Free... >41" Total Pres... 785" i Outlet Vd'... 1300 ft. Outlet Vel.... 1400 ft. Outlet Vd... 1500 ft. Outlet Vd... 1600 ft. Outlet Vd. ..1700ft Per. Speed.. .1610ft. Per. Speed... 955 ft. Per. Speed.. .2145 ft. Per. Speed...2371 ft. -Per. Speed.. .2578 ft s i 3 CT.M. Rer. H.P. C.F.U. Rer. HJ. C.F.M. Rer. H.P. CJ.M. Rer. H.P. C.F.M. Rer. H.P. *U 1185 K 2! 24 W 27 30 33 30 42 43 54 60 66 73 78 84 90 96 102 108 120 1.24 1.78 2.43 3.17 4.02 4.96 6.0 7.25 9.72 12.7 16.1 194 24.0 28.6 33.6 38.9 504 57.3 64.3 79.3 1,610 409 2,320 341 3.160 292 4,120 256 5,150 22/ 6,450 209 7.800 186 9.280 1/1 12,600 146 16,500 128 20.850 114 25.750 103 31,200 37.100 43.600 93 86 79 50.600 58,000 66,000 73 64 74,500 61 57 .18 1,735 497 .28 2,500 415 24 3,400 355 55 1560 546 56 2,680 455 .48 3,650 390 .34 1.980 603 .48 2,850 503 .65 3,890 431 .44 2.110 too 44 .62 3,030 547 .78 44 4,130 409 1.1 .44 4.500 311 55 5,620 276 .63 6.950 249 .63 4,750 341 54 5,075 377 1.1 5.400 410 1.4 .79 .97. 6,020 303 156 7,450 273 14 6.430 335 157 7,960 303 1.7 6.830 S' ii 8.430 1 8.400 226 1.16 9.000 248 1 56 9,600 274 2.1 10,200 298 2.6 .96 10,000 207 1.37 10,700 227 155 11,400 262 2.4 12.150 273 3.0 15 13,600 178 155 14,600 195 24 15400 216 355 16400 234 4.0 . 1.7 2.1 17.750 156 2.4 22,500 138 3.0 19,000 170 3.2 24.100 151 4.0 20,300 188 4.2 25,700 158 5.2 21400 $ ti 27.100 2.6 27 500 124 3.7 29,700 137 5.0 31,700 151 6.4 33,700 164 8.0 3.1 33.600 113 45 36,000 124 6.0 38.400 137 74 40,800 0.7 3.6 40,000 104 6.2 42.800 114 7.0 45,700 126 9.1 48,500 4.2 47,000 96 6.1 50,250 105 8.1 63,700 116 10.6 67,000 126 134 45 54.400 89 7.0 58,300 98 94 62500 108 12.2 66.200 117 154 55 62500 83 7.9 67,000 91 10.6 71,450 101 13.8 76,000 6.2 71.200 78 8.9 76,200 86 11.9 81,200 95 154 86.400 103 194 7.0 80.250 73 10.0 66.000 81 13.4 91,700. 89 174 97,400 97 214 7.8 90,000 69 115 96.500 76 15.1 102,800 84 19.6 109.200 91 24.4 9.7 111,000 63 135 119,000 69- 18.6 127,000 76 244 135,000 82 30.0 Lehigh Multxblade Fans--Type "M"--For Use in Heating and Ventilating This type of fan is designed particu wheel are those of tension, in which all larly for use in connection with heating metal is strongest, rather than shear, in and ventilating systems in public and which it is weakest. No wobbling side industrial buildings where large volumes thrusts occur with this construction. of air are handled at comparatively low The curvature of the Multiblades does pressures. It is proportioned to give not restrict the area of discharge and low velocities of air throughout with therefore the capacity of the wheel. the least resistance both at the entrance and at the. discharge. The housing, being rigidly braced with angle iron and the inlet and outlet with The special construction of this type tee iron punched .for sheet metal con of wheel combines in one the desirable nection, is free from vibration under the qualities of the older steel plate fan highest speeds and pressures. .wheel with the large capacity and effici- -ent operation of the Multiblade Type. - The. bearings are of unusual1 quality This wheel requires no stay-rods to keep, (ball and socket type)- with double ring it in shape under any speed. The. oiling and best babbit. They are self strength and rigidity of construction aligning jn all directions. This prevents can be readily ascertained from examina the sh^ft from becoming bounds . tion of the radial blades which run to ! the hub of the wheel, so placed'in order The; shaft is constructed of,the best to give the greatest strength in the direc grade of DRAWN STEEL'containing tion of . rotation. The strains : on .this ; from 30 to 40% carbon. 8 s 1" STATIC PR. IK" STATIC PR. IK" STATIC PR. IK" STATIC PR. 2" STATIC PR. Total Pres... 1.202" Total Pres... 1.5" Total Pro... 153" Outlet Vel... 1800 ft. Outlet Vd. ..2000ft. Outlet Vd...2300 ft. 1 Per. Speed,..2950ft. Per. Speed...3300 ft Per. Speed.. .3625 ft. Per. Speed.. .3930ft. Per. Speed...4220 ft. .9 a -i C.F.M. Her. H.P. C.F.M. Rer. H.P. C.F.M. Rer, H.P. C.F.M. Rer. HIP. CSM. Rer. H.P. ` 15 24 S 33 3B 48 60 66 78 84 102 144 2.230 751 .73 2.480 838 1.0 1.1 3,540 698 15 636 1.4 4550 600 9.0 2,850 922 4.100 768 5580 659 14 21 24 3,100 1000 4.460 0,070 714 1.85 3550 1073 34 6450 768 3.17 5.710 469 1.9 25 2.9 6,350 524 8,010 466 9,900 419 2.6 3.2 4.0 6.0 10,800 341 d3if ^381 45 4i' $42t -349 5.6 17,600 268 55* 4;*o0'?aoo 7.6 7500 676 9,250 513 11.400 441 36 4.6 5.6 13,800 419 67 16.450 3H4 86 22,400 330 10.7 7.950 674 '4.6 8480 10,000 555 6.8 12,400 500 7.1 13,400 537 15.000 454 84 17.850 24500 357 13.6 26,200 384 12.7 16.1 19-8 22.900 235 23500- ,262- *t95 -'29.200 288 134 \8.9? '36,900 254 175 35,700 188 *J04' ,15JO}: j45,600 231 214 31.700 312 40500 278 49400 250 17.6 22.0 26.9 34,300 43500 299 53400 269 24.0 43,150 171 D3.0' 155 33.5 60,400 145 175 i|9W 'v5t200 ^210 25 4 *514 { *45*700. 7192 30.0 24-7^ '77,000 :i7s 34.9 *60.000 727 325 71,500 208 38.1 83,700 192 444 64500 77,100 224 90400 207 38.9 70.000 134 205 77.700 YSO 285 -89300 165 40.0 97,200 179 504 SO.8 235 89.400 140 325 103,000 154 455 111.600 167 58.0 120.600 265 101500 131 365 116,800 145 515 127,000 156 654 137500 163 .57.3 103,000 107 29.4 115,700 33.0 40.7 114.600 124 40.7 128.500 117 455 189.000 .105 565 132.000 135 57.6 143,000 147 734 155,000 147,600 64.7 160.500 139 82.2 173400 182,500 116 794- 198500 125 1014 214,000 135 2.4 4.6 74 94 175 28.8 354 60.0 584 66.7 854 964 1334 271 tv, _