Fan LEF/MEF 250-630 - LEX/MEX ATEX versions GEOVENT centrifugal fan LEX and MEX with closed backward curving B-wheel and directly driven flange motor. The fan is used for extraction within the industry or for comfort ventilation. The fan has a high efficiency up till 87 % and is suitable for PID/constant pressure regulation. The fan is made of 100% galvanized steel for optimum corrosion resistance and therefore, it is suitable for outdoor installation on the roof or on the wall. There is a complete program of accessories, and the fan can be delivered with a number of options, such as flex connection, mountings, rain shield, motor protection, pressure monitor and soundproof box. As standard we supply supporting angels with vibration absorbers, inlet nozzle with net and clamp for mounting the outlet flange. The fan is also supplied in ATEX version according to the 2014/34/EU directive. Then the type is called LEX/ MEX, and it is supplied as standard with EExE motor. Other variants are offered on inquiry. The fan can, on inquiry, be supplied in an acid proof steel version (ANSI 316L) or with built-in frequency converter, two-speed motor, with 6- or 8- poled motors, motors with special voltage or higher efficiency, special high temperature version a.s.o. Air volume up to Pressure up to: 24.100 m³/h 4.500 Pa Technical data / Other data / Features Motor: Directly driven by a B5- Flange motor. Sealing class IP-55 LEF/MEF fan angels with vibration absorbers, inlet nozzle with net and clamp for mounting the outlet flange. Dust amounts and corn size The dust amount from the extracted air may not xceed 12 g/m³. The size of the dust particles may not exceed 6 mm³. The dust/steams may not be sticky. Temperature area Surrounding temperature: +40 C Temperature extracted air: +80 C Voltage: 3x400V or 1x230V / 50 Hz House: Made of hot-galvanized plate. All screws and bolts are electrolytic galvanized. Inclusive supporting
Pressure drop curves - LEF/MEF Fan LEF / MEF-250 Fan LEF / MEF-315 1625 n=3995 69% (2p - 70Hz) 1375 1250 1125 875 625 500 375 250 125 n=3480 (2p - 61Hz) n=2860 n=2560 (2p - 45Hz) n=1460 (2p - 25Hz) 57dB(A) 70B(A) 73B(A) 0,09kW 83% 76dB(A) 76% 0,25kW 0,18kW 64% 0,37kW 48% 0,55kW 1690 n=3200 74% (2p - 56Hz) 1560 1430 1300 1170 1040 910 780 650 520 390 260 130 n=2860 n=2560 (2p - 45Hz) n=2280 (2p - 40Hz) n=2010 (2p - 35Hz) n=1460 (2p - 25Hz) 64dB(A) 72dB(A) 73dB(A) 77dB(A) 84% 81dB(A) 80% 0,37kW 0,25kW 0,12kW 71% 59% 0,75kW 0,55kW 48% 1,1kW 200 400 600 800 1200 1400 1600 1800 2200 Air Flow [m³/h] 300 600 900 1200 1800 2100 2400 2700 3000 3300 2400 2100 1800 1350 1200 1050 900 600 450 300 150 n=1460 (2p - 25Hz) 500 n=3540 (2p - 62Hz) n=2860 n=2507 (2p - 44Hz) n=2240 (2p - 39Hz) n=3277 (2p - 57Hz) 69dB(A) Fan LEF / MEF-355 75% 82dB(A) 0,25kW 85dB(A) 82% 88dB(A) 89dB(A) 0,75kW 2500 3000 3500 4000 4500 5000 5500 78% 1,1kW 1,5kW 68% 51% 46% 3,0kW 2800 2600 2400 2200 1800 1600 1400 1200 800 600 400 200 n=3538rpm (2p - 61Hz) n=2915rpm n=2675rpm (2p - 46Hz) n=2150rpm (2p - 37Hz) n=1375rpm 70dB(A) Fan LEF / MEF-400 75% 84dB(A) 0,37kW 82% 86dB(A) 1,1kW 85% 90dB(A) 2250 3000 3 4500 5250 6000 6 0 8250 80% 75% 4,0kW 68% 50% 5,5kW
Pressure drop curves - LEF/MEF 3250 3000 2 2500 2250 1 n=3306 (2p - 57Hz) n=2900 n=2552 (2p - 44Hz) Fan LEF / MEF-450 74% 81% 87dB(A) 86% 89dB(A) 92dB(A) 81% 74% 3900 3600 3300 3000 2700 2400 2100 n=3300 77% (2p - 57Hz) n=2900 n=2690 (2p - 46Hz) n=2430 (2p - 42Hz) Fan MEF-500 83% 94dB(A) 92dB(A) 87% 97dB(A) 82% 76% 68% 1250 500 250 n=2120 (2p - 36Hz) n=1395 73dB(A) 83dB(A) 0,75kW 4,0kW 62% 5,5kW 49% 7,5kW 1800 1200 900 600 300 n=2120 (2p - 36Hz) n=1585 (2p - 27Hz) 80dB(A) 87dB(A) 1,1kW 90dB(A) 7,5kW 5,5kW 4,0kW 51% 11kW 3000 4000 5000 6000 7000 8000 9000 0 1 1200 2400 3600 4800 6000 7200 8400 9600 10800 1 13200 4000 n=2930 55% Ventilator Fan LEF LEF/MEF-560 / 65% 98dB(A) 79% 4000 3 3500 3250 Fan LEF / MEF-630 n=2300rpm (2p - 41 Hz) 79% n=2600rpm (2p - 46 Hz) 86% 97 db(a) 82% 3000 n=2445 (2p - 42Hz) n=2146 (2p - 37Hz) 94dB(A) 91dB(A) 65% 55% 18,5kW 3000 2 2500 2250 1 1250 n=1440rpm (4p - 50 Hz) n=2030rpm (4p - 70 Hz) n=1830rpm (4p - 63 Hz) n=1584rpm (4p - 55 Hz) 86 db(a) 84 db(a) 89 db(a) 92 db(a) 94 db(a) 74% 62% 52% 22 kw n=1440 11kW 7,5kW 500 250 7,5kW 5,5kW 4,0kW 11kW 15kW 4000 6000 8000 0 1 14000 16000 18000 0 2 Volumenstrøm Air flow (m 3 /h) [m³/h] 4000 6000 8000 0 1 14000 16000 18000 0 2 24000 26000 Air flow (m 3 /h)
Dimensions ød I 6 x M6 5 x M8 ød A M Electrical motors ranging from 0,25 to 4kw are as standard delivered with B5 mounting flange. From 5.5kw and up are delivered with B35 flange/base and support. ø9 F H B G C N L M8 E J 14 48 K Dimension table, Fans LEF/MEF (LEX/MEX) Type A B C ød ød E F G H I J K M N Weight LEF/MEF 250 410 500 500 250 *** 215 230 210 460 ** 170 320 637 185 38kg* LEF/MEF 315 510 550 600 315 *** 260 290 240 460 ** 210 400 720 225 43kg* LEF/MEF 355 570 655 680 400 *** 284 329 272 460 ** 234 450 797 250 48kg* LEF/MEF 400 648 800 756 400 *** 308 367 304 760 ** 260 500 965 275 56kg* LEF/MEF 450 715 800 850 500 *** 340 408 340 760 ** 290 560 1045 305 71kg* LEF/MEF 500 758 800 871 500 *** 345 421 362 760 ** 295 510 1065 263 81kg* LEF/MEF 560 907 800 1070 630 *** 425 523 440 760 ** 375 709 1340 380 125kg* LEF/MEF 630 989 800 1175 630 *** 446 563 467 760 ** 400 800 1340 425 135kg* */**/*** - depends on motor choice. NB: By LEX/MEX versions the motor will typically have a larger physical measure than standard versions, and therefore it will also have a higher net weigh
Accessories Soundproof box for reduction of the sound level. The fan is enclosed in a closed wind- and waterproof galvanized box. The sound is typically subdued to 8-15 db(a) Galvanized rain shield for the fan. Protects the motor from water intrusion Wall bracket, hot-galvanized, is supplied in two sizes, For mounting the fan on wall Must be used with supporting angels Outlet flange, hot-galvanized, is supplied in several Different sizes. Is used as transition from the fan s square yield to a round channel. Sound data - measured in inlet Type 63 Hz 125 Hz 250 Hz 500 Hz Hz Hz 4000 Hz 8000 Hz Lp. db(a) Lp. 1m LEF 250, measure v. 500 m 3 /h, 1380 rpm 42,1 65,8 50,8 48,2 51,5 50,3 47,9 33,7 57,2 66,3 LEF 315, measure v. 1200 m 3 /h, 1380 rpm 42,5 74,5 58,0 54,7 55,5 53,1 44,7 41,7 62,8 74,8 LEF 355, measure v. m 3 /h, 1380 rpm 55,4 81,3 65,9 61,8 63,0 61,0 56,3 50,2 69,6 81,6 Type 63 Hz 125 Hz 250 Hz 500 Hz Hz Hz 4000 Hz 8000 Hz Lp. db(a) Lp. 1m MEF 250, measure v. m 3 /h, 2730 rpm 64,3 87,3 74,3 69,5 69,9 74,3 65,1 63,1 77,5 87,9 MEF 315, measure v. 2800 m 3 /h, 2 rpm 64,8 91,6 75,9 71,5 71,1 68,5 60,5 59,8 79,5 91,8 MEF 355, measure v. 4000 m 3 /h, 2850 rpm 68,1 95,7 81,8 77,5 78,0 76,2 68,4 66,0 84,7 96,1 MEF 400, measure v. 3500 m 3 /h, 2850 rpm 75,6 92,9 85,3 77,5 78,9 76,1 68,3 62,2 84,4 94,0 MEF 450, measure v. 7000 m 3 /h, 2550 rpm 73,5 99,9 82,9 79,9 79,9 77,4 69,1 67,5 87,8 100,1 MEF 500, measure v. 8000 m 3 /h, 2669 rpm 77,4 101,4 86,3 83,8 86,9 85,7 83,5 69,3 92,7 101,9 MEF 560, measure v. 10.000 m 3 /h, 2260 rpm 77,7 101,2 85,9 81,2 83,6 81,1 72,8 67,9 90,1 101,5
A. B. C. D. E. B. A. C. D. A. B. C. D. F. F. A. Outlet flange, transition from the fan s square yield to a round channel. The outlet flange, which is a sleeve, has an EPDM rubber packing in sealing class C. By using vibration dampers a flexible connection between the outlet flange and the yield can be inserted. B. Clamp, galvanized, is used for attachment of the outlet flange with the aid of 6 pcs. M6 screws. After mounting you must use joint filler. C. Inlet in sleeve, galvanized, is provided with net to protect the fans impeller and EPDM rubber packing in sealing class c. By using vibration dampers a flexible connection between the inlet and the piping can be inserted. D. Supporting angels, galvanized, is supplied with or without vibration dampers depending on the application. The vibration dampers are adjusted to each Fan. E. Roof bracket GB 15-45, galvanized, is supplied with angel brackets on 500x1.000mm, so it is possible to saw off until you have the right pitch. The roof bracket is supplied with 4 pcs. Of mounting sheets with holes for the most common roofing tiles. F. Wall bracket, galvanized, is supplied as a complete set with screws for mounting the fan.
LEF/MEF 250-355 Art. no. Model [kw] [A] 33-701 LEF-250-3 0,25 1,8 33-702 MEF-250-3* 0,37 4,9 33-705 MEF-250-1* 0,37 7,2 33-706 GLEF-250-3 0,25 9,8 33-708 GMEF-250-3* 0,37 13,8 34-651 LEF-315-3* 0,25 0,8 34-652 MEF-315-3* 0,55 1,4 34-653 MEF-315-3 0,75 1,9 34-654 MEF-315-3* 1,1 2,4 34-655 LEF-315-1* 0,25 2,05 34-656 MEF-315-1 0,75 4,9 LEF/MEF 400-630 Art. no. Model [kw] [A] 35-201 LEF-400-3 0,37 1,05 35-202 LEF-400-1 0,37 3,83 35-203 MEF-400-3* 2,2 4,4 35-204 MEF-400-1* 2,2 13,2 35-206 MEF-400-3 4 7,2 35-206A MEF-400-3* 5,5 9,8 35-701 LEF-450-3 0,75 1,8 35-702 LEF-450-1 0,75 4,9 35-705 MEF-450-3* 4 7,2 35-706 MEF-450-3 5,5 9,8 35-708 MEF-450-3* 7,5 13,8 34-701 LEF-355-3 0,25 0,8 34-702 MEF-355-3* 0,75 1,9 34-703 MEF-355-3* 1,1 2,4 34-704 MEF-355-3 1,5 3,15 34-705 MEF-355-3* 2,2 4,4 34-706 MEF-355-3* 3 5,75 34-707 MEF-355-1 1,5 8,75 34-708 LEF-355-1 0,25 2,05 * = Presupposes the use of an external frequencyconverter. Exhaust air RD0 RD90 RD270 36-500 MEF-500-3 7,5 13,8 36-501 MEF-500-3* 11 19,5 36-502 MEF-500-3* 5,5 9,5 36-503 MEF-500-3 4 7,2 36-504 LEF-500-3 1,1 2,5 35-801 LEF-560-3 2,2 4,6 35-802 MEF-560-3* 7,5 13,8 35-803 MEF-560-3* 11 19,5 35-804 MEF-560-3 18,5 34,3 35- MEF-630-3* 22 38,1 35-A MEF-630-3* 15 26,4 35-751 LEF-630-3 4 7,9 35-752 LEF-630-3* 7,5 14,2 35-753 LEF-630-3* 11 21,5 35-755 LEF-630-3* 5,5 10,8 * = Presupposes the use of an external frequencyconverter. Exhaust air seen from the motor side
ATEX fan LEX/MEX Our series of atex fans with backward curving impellers are as standard supplied with EEx e motors, but can also be supplied with EEx d or EEx de motors. The typical scope of application is zone 1, zone 2 and zone 22. The construction is based on standard LEF/MEF, but has beside the ATEX motor, also protection against static and sparks in inlet. For ATEX applications, where acid proof execution is needed, this can be offered. All plate parts, screws and bolts a.s.o. are supplied in Acid proof ANSI 316L and are subsequently stained. The wheel is either supplied in a special lacquered edition or in ANSI 316L. NB: All volume current curves are as standard only 50 hz, in LEX/MEX atex versions. LEX 630-3 ATEX Fan in stainless ANSI316L ATEX Compliant LEX/MEX 250-630 Art. no. Model (kw) (volt) (Ampere) 37-510 LEX 250-3 0,25 3x400 0,90 37-520 MEX 250-3 0,37 3x400 1,08 37-530 LEX 315-3 0,25 3x400 0,90 37-540 MEX 315-3 0,75 3x400 1,80 37-550 LEX 355-3 0,25 3x400 0,90 37-560 MEX 355-3 1,50 3x400 4,00 37-570 LEX 400-3 0,37 3x400 1,08 37-580 MEX 400-3 4,00 3x400 8,10 37-590 LEX 450-3 0,75 3x400 1,90 37-591 MEX 450-3 5,50 3x400 10,40 37-592 MEX 500-3 7,50 3x400 13,70 37-595 LEX-560-3 2,2 3X400 8,1 37-596 MEX-560-3 18,5 3X400 33,00 37-593 LEX 630-3 4,00 3x400 8,1