Liquid ring vacuum pumpsin compact design LEM 91, LEM 126, LEM 161 LEL 91, LEL 126, LEL 161 with threaded connection Pressure range: Suction volume flow: 33 to 1013 mbar 24 to 195 m³/h CONSTRUCTION SIHI liquid ring vacuum pumps are displacement pumps of uncomplicated and robust construction with the following particular features: non-polluting due to nearly isothermal compression oil-free, as no lubrication in the working chamber handling of nearly all gases and vapours small quantities of entrained liquid can be handled easy maintenance and reliable operation low noise and nearly free from vibration wide choice of material, therefore applicable nearly everywhere protection against cavitation as standard incorporated dirt drain incorporated central drain no metallic contact of the rotating parts The SIHI liquid ring vacuum pumps LEM/LEL are single-stage ones. APPLICATION Handling and exhausting of dry and humid gases; entrained liquid can be handled during normal duty. The pumps are applied in all fields where a pressure of 33 to 900 mbar must be created by robust vacuum pumps. NOTE During operation the pump must continuously be supplied with service liquid, normally water, in order to eliminate the heat resulting from the gas compression and to replenish the liquid ring, because part of the liquid is leaving the pump together with the gas. This liquid can be separated from the gas in a liquid separator (see catalogue part accessories). It is possible to reuse the service liquid. The pumps are equipped with a device by which the contaminated service liquid can continuously be drained during operation (dirt drain), if necessary. The direction of rotation is clockwise, when looking from the drive on the pump. GENERAL TECHNICAL DATA Pump type Speed unit 50 Hz 60 Hz Maximum overpressure on compression Permissible pressure difference between suction and discharge side max. min. Hydraulic test pressure (overpressure) rpm rpm LEM 1.1 / LEL 1.3 0.2 bar 3 dB (A) Maximum flow resistance of the heat exchanger 0.007 0.009 72 (67)* 200 100 °C 80 10 4 1200 0.6 bar 0.5 0.070 65 °C °C mm²/s kg/m³ litre LEM 161 LEL 161 1450 1750 bar Noise level at 80 mbar suction pressure Service liquid Maximum permissible temperature Minimum permissible temperature Maximum viscosity Maximum density Liquid capacity up to middle of shaft 2900 3500 LEM 0.3 / LEL 0.5 kg . m² dry saturated LEM 126 LEL 126 bar Moment of inertia of rotating parts of pump and water content Maximum gas temperature LEM 91 LEL 91 2.0 0.2 The combination of several limiting values is not admissible. * Value in parenthesis for measuring with sound insulation cup 133.71323.57.01 E VACUUM TECHNOLOGY LEM/LEL LE 2B 05/2015 126.30 Mechanical seal 75.10 Cover 21.4308 1.01 * 0K 1. 126.01 * Motor carrier 43.4571 Vane wheel impeller 33.70 Guide disc 16.6025 0. 161 Cut-away diagram LEM 91.40 Valve balls 4B 0.4404 1.10 Vacuum casing 13.4408 0.Materials MATERIALS Item COMPONENTS 10. 161 2 .6025 1.4408 1.4301 1.00 * Shaft 23.50 Bearing bracket 34.6025 (stove enamelling) Cr-steel / carbon / butadiene rubber Cr Ni Mo-steel / carbon / Viton Polyamide A PTFE * only for LEL 91. 3 .40 0.38 0.13 0. suction pressure in [mbar] Pump type speed [rpm] LEM/LEL 91 LEM/LEL 126 LEM/LEL 161 2900 3500 2900 3500 1460 1750 33 KB temperature difference [°C] 10 5 2 0. speed.17 0. 5 °C.62 1.44 0.43 0.26 0.61 0.24 0. warmer than make-up water.19 0.62 0.2 KB temperature difference [°C] 10 5 2 0.19 0.20 0.44 0.60 0.31 0.34 0.39 0.41 0.21 0.54 0.75 200 FB 0.29 0.25 0.36 0.27 0.40 0.Cut-away diagram LEL 91. 2 °C.17 0. drive type and temperature difference.40 0.66 1.27 0.30 0.17 0.14 KB temperature difference [°C] 10 5 2 0.34 0.72 120 FB 0.24 0.15 0.27 0.74 400 FB 0.26 0.44 0.26 0.6 1.54 0.66 0.66 0.21 0.25 0.40 0.68 FB 0.39 0. 161 Make-up Liquid Consumption in [m³/h] dependent upon suction pressure.18 0.34 0.22 0.14 0.22 0.21 0.49 0.26 0. 126.31 0.66 0.17 0.38 0.22 0.16 0.41 0.11 0.48 0.23 0.47 0.96 FB = total service liquid flow rate on once-through system KB = flow of make-up water when combined with partial recirculation liquid at a temperature of 10 °C.31 0.36 0.39 0.3 KB temperature difference [°C] 10 5 2 0.14 0.15 0.31 0.31 0.40 0.6 0. The maximum consumption of make-up water occurs at the lowest suction pressure.Performance Characteristics LEM 91 / LEL 91 100 m³/h 3500 rpm suction volume flow 80 2900 rpm 60 40 20 LEM/LEL 91 0 10 40 60 80 100 200 400 mbar 1000 suction pressure 4 kW power absorption 3 3500 rpm 2 2900 rpm 1 LEM/LEL 91 0 10 40 60 80 100 200 suction pressure The operating data is valid under the following conditions: process media: . 4 400 mbar 1000 .dry air: . Tolerance on operating data is 10%.water: 15°C Pressure of gas to be evacuated: 1013 mbar (atmospheric pressure) The suction volume is related to the suction pressure.steam saturated air: 20°C 20°C service liquid: . Performance Characteristics LEM 126 / LEL 126 120 3500 rpm m³/h suction volume flow 100 80 2900 rpm 60 40 20 LEM/LEL 126 0 10 40 60 80 100 200 400 mbar 1000 suction pressure 5 kW power absorption 4 3500 rpm 3 2900 rpm 2 1 LEM/LEL 126 0 10 40 60 80 100 200 suction pressure The operating data is valid under the following conditions: process media: .water: 15°C Pressure of gas to be evacuated: 1013 mbar (atmospheric pressure) The suction volume is related to the suction pressure. The maximum consumption of make-up water occurs at the lowest suction pressure.dry air: . 5 400 mbar 1000 .steam saturated air: 20°C 20°C service liquid: . Tolerance on operating data is 10%. Performance Characteristics LEM 161 / LEL 161 m³/h 200 1750 rpm suction volume flow 1460 rpm 100 LEM/LEL 161 0 10 40 60 80 100 200 400 mbar 1000 suction pressure 6 kW power absorption 5 4 1750 rpm 3 1460 rpm 2 1 LEM/LEL 161 0 10 40 60 80 100 200 suction pressure The operating data is valid under the following conditions: process media: .water: 15°C Pressure of gas to be evacuated: 1013 mbar (atmospheric pressure) The suction volume is related to the suction pressure.steam saturated air: 20°C 20°C service liquid: .dry air: . Tolerance on operating data is 10%. 6 400 mbar 1000 . The maximum consumption of make-up water occurs at the lowest suction pressure. 2 3.0 - 6.Dimensions LEM 91.3 4. weight [mm] [kg] 44 225 190 250 390 555 55 256 216 276 426 591 62 90 . kW e f f1 h h 1 h 2 h 4* m m 1 m 2 n n1 n2 n3 s w * w 1* weight size 50 Hz 60 Hz [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [kg] 90 L 100 L 100 L LEM 126 112 M LEM 91 2.0 f f1 h h 1 h 2 h 4* h 5 m m 1 [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] [mm] 100 122 284 112 15 281 70 110 132 304 132 18 320 60 m 2 [mm] m 3 [mm] m n1 n2 n3 w * w 1* [mm] [mm] [mm] [mm] [mm] [mm] [mm] 4 m 5 45 176 140 280 240 58 88 218 178 320 278 - other motors on request * dimensions dependent upon motor supplier ** see list of accessories 7 n approx.0 - 3. 126. 161 N 1 = gas inlet G 1¼ uc = connection for cavitation protection G ¼ N 2 = gas outlet G 1¼ ue = connection for drain G ¼ uB um = connection for pressure gauge G ¼ = connection for service liquid G ¼ electric motor IP 55 approx.8 91 95 56 82 228 90 11 229 36 63 89 238 100 13 253 43 70 96 250 112 15 278 45 155 125 176 140 35 170 140 200 38 195 160 220 44 225 190 250 9 283 12 303 340 399 420 424 461 29 34 39 other motors on request * dimensions dependent upon motor supplier ** see list of accessories N 1 = gas inlet G 1½ uc = connection for cavitation protection G ¼ N 2 = gas outlet G 1½ ue = connection for drain G ¼ uB um = connection for pressure gauge G ¼ = connection for service liquid G ½ electric motor IP 55 kW size 50 Hz 60 Hz LEM 161 112 M 132 M 4. weight [kg] 14 M12 62 82 215 265 180 230 250 300 495 515 352 372 65 72 other motors on request 8 . LEL 126.0 - 5.Dimensions LEL 91.5 3.0 d [mm] l1 [mm] M [mm] N [mm] P [mm] w1 [mm] w2 [mm] approx.2 3. LEL 161 N 1 = gas inlet G 1¼ uc = connection for cavitation protection G ¼ N 2 = gas outlet G 1¼ ue = connection for drain G ¼ uB um = connection for pressure gauge G ¼ = connection for service liquid G ¼ electric motor 50 Hz kW size IP 55 EEx e ll T3 LEL 91 LEL 126 90 L 100 L 100 L 112 M 2.5 52 165 130 200 461 446 370 48 63.5 62 215 180 250 356 44 451 other motors on request N 1 = gas inlet G 1½ uc = connection for cavitation protection G ¼ N 2 = gas outlet G 1½ ue = connection for drain G ¼ uB um = connection for pressure gauge G ¼ = connection for service liquid G ½ electric motor 50 Hz kW size IP 55 EEx e ll T3 LEL 161 112 M 132 S 4.0 - 2.3 d [mm] M10 14 e [mm] 91 95 l [mm] l1 [mm] M [mm] N [mm] P [mm] w1 [mm] w2 [mm] approx. weight [kg] 87. 0 f2 [mm] h [mm] h1 [mm] h2 [mm] h3 [mm] h4 [mm] h5 [mm] approx.Arrangement drawing LEM 91.2 3.8 uA = liquid drain G ¾ uF = connection for make-up liquid G ¼ f2 [mm] h [mm] h1 [mm] h2 [mm] h3 [mm] h4 [mm] approx. weight [kg] 72 82 754 764 112 132 354 364 182 192 135 145 70 60 76 104 other motors on request 9 . 161 N1 = gas inlet G 1¼ N2 = gas outlet G 1½ electric motor IP 55 kW size 50 Hz 60 Hz LEM 91 LEM 126 90 L 100 L 100 L 112 M 2.0 - 6.3 4. 126. weight [kg] 25 623 90 288 150 117 41 39 633 100 298 160 127 46 46 645 112 310 172 139 51 other motors on request N1 = gas inlet G 1½ uA = liquid drain G 1 N2 = gas outlet G 2 uF = connection for make-up liquid G ½ electric motor IP 55 kW size 50 Hz 60 Hz LEM 161 112 M 132 M 4.0 - 3. 2 3.0 - 3.Arrangement drawing LEM 91. 126.4571 the line N 1 = gas inlet G 1½ uA = liquid drain G 1 N 2 = gas outlet G 2 uF = connection for make-up liquid G ½ electric motor IP 55 kW size 50 Hz 60 Hz LEM 161 112 M 132 M 4.4571 the line 10 .8 f2 [mm] h [mm] h1 [mm] h2 [mm] h3 [mm] h4 [mm] approx.0 - 6.0 f2 [mm] h [mm] h1 [mm] h2 [mm] h3 [mm] h4 [mm] h5 [mm] approx. 161 with thermostatic control N1 = gas inlet G 1¼ uA = liquid drain G ¾ N2 = gas outlet G 1½ uF = connection for make-up liquid G ½ electric motor IP 55 kW size 50 Hz 60 Hz LEM 91 LEM 126 90 L 100 L 100 L 112 M 2. weight [kg] 72 82 754 764 112 132 354 364 182 192 197 207 70 60 81 109 other motors on request ** only at material 1. weight [kg] 25 623 90 288 150 160 46 39 633 100 298 160 170 51 46 645 112 310 172 182 56 other motors on request ** only at material 1.3 4. 126.5 3.2 3. weight [kg] N1 = gas inlet G 1¼ N2 = gas outlet G 1½ 72 77 73 83 uA = liquid drain G ¾ uF = connection for make-up liquid G ¼ N1 = gas inlet G 1½ N2 = gas outlet G 2 uA = liquid drain G 1 uF = connection for make-up liquid G ½ other motors on request * dimension dependent upon motor supplier electric motor 50 Hz kW size IP 55 EEx e ll T3 LEL 161 112 M 132 S 4.0 - 5.0 - 2. weight [kg] 320 405 352 372 105 150 other motors on request * dimension dependent upon motor supplier 11 .Arrangement drawing LEL 91.3 w* [mm] w2 [mm] 269 370 303 356 320 approx. 161 electric motor 50 Hz kW size IP 55 EEx e ll T3 LEL 91 LEL 126 90 L 100 L 100 L 112 M 2.0 w* [mm] w2 [mm] approx. but 4B o-rings Viton main parts out of cast iron.0 kW AC motor 50 Hz. AA1 0K. with threaded connection Z two grease lubricated antifriction bearings arranged in the motor B similar to Z. o-rings butadiene rubber 0K similar to AAE. voltage and protection class.0 kW AC motor 50 Hz. FS FS 8B FS. Example for ordering LEM: LEM 126 AZ AAE 0K 0 with 3. IP55 Example for ordering LEL: LEL 161 8B AAE 0K 0 for 4. To identify the right motor please specify frequency. 230 V. impeller in low alloyed steel 0 liquid seal main parts out of stainless steel *code of motor connection* ES for IMB5 motor 90L flange ø200 FS for IMB5 motor 100L resp. IP55 (motor size 112) has the complete designation: LEL 161 8B AAE 0K 0 FS 12 . 4B AB 0 ES. GS * = only LEL Motor selection For our products we offer a lot of different motor types.Data regarding the pump size . 230 V.order notes range + size hydraulic + bearings A 8 hydraulic A. 112M flange ø250 GS for IMB5 motor 132S flange ø300 AZ 8Z AAE. but arranged in the motor carrier 91 LEM 126 161 91 LEL 126 161 shaft seal AAE AA1 casing sealing materials standard mechanical seal. 20 027 918 20 050 497 20 050 498 20 027 919 Side Mounted Liquid Separator Type / weight Side mounted separator Steel. 112 M for motor size 132 M Motor standard execution IP 55 only for LEL Coupling for motor IP 55 pump side motor side Motor in EEx e ll T3 execution Size Power Weight Type / weight SIHI-Part No.9 kg 43 111 058 43 111 029 132 S 5.1 kg 43 111 051 43 111 040 .9 resp. 3.2 kW 15 kg 100 L 3. 3. 161.7 resp. on request Sterling SIHI – Gas Ejector at service liquid temperature 15 °C Type Weight GEV 91 A GEV 126 A 3. Brass + Teflon 1. galvanised 1.5 kW 22 kg B 80 / 1. Cavitation protection pipework 1. standard execution 1.4571 SIHI-Part No.sihi.0254 + Brass 1.8 kg 3.4571 SIHI-Part No.5 kg 43 028 149 43 021 405 100 L 2.6 resp.0 kg at service liquid temperature 30 °C Type Weight GEV 91 B GEV 126 B 3. 20 048 243 20 048 244 20 048 245 20 048 246 Cavitation protection pipework 1. 35 000 379 35 000 380 35 000 382 35 000 383 service liquid pipework. 1. 20 037 865 20 038 838 20 059 452 20 061 181 service liquid pipework.5 kg 43 021 414 43 021 417 112 M 3.6 resp. standard execution 1.4571 SIHI-Part No. Designs subject to change without prior notice. for motor size 100 L.0 kg Sterling SIHI – Non Return Ball Valve Size Weight G1¼ 1. 126. 126. 4.com 13 20 047 009 - - 20 047 010 20 047 010 20 047 011 - - 20 047 012 90 L 2.Accessories LEM 91.4571 SIHI-Part No.4571 SIHI-Part No.9 resp.0254 1.0 kW 28 kg B 68 / 1.3 kW 28 kg BDS 88 / 1.0 kW 20 kg 112 M 4. 5. service liquid pipework.9 kg 20 069 579 20 069 525 20 072 819 20 082 115 20 082 117 20 072 820 Brass + Butadiene Rubber SIHI-Part No.0254 1. D-25524 Itzehoe.7 resp.4571 + Teflon Support foot only for LEM for motor size 90 L SIHI-Part No.0 resp. Sterling SIHI GmbH Lindenstraße 170.6 kg G1½ 1.0 kW 65 kg BDS 103 / 3.4571 SIHI-Part No.2 kg GEV 161 A 4. thermostatic control 24V 1.8 kg 3. only for LEL Coupling for motor EEx e ll T3 pump side motor side Size Power Weight Type / weight SIHI-Part No. 4. Germany Telephone +49 (0) 48 21 / 7 71-01. 5. 161 with threaded connection Recommended Accessory LEM 91 LEL 91 Material Execution LEM 126 LEL 126 LEM 161 LEL 161 Top Mounted Liquid Separator Type / weight XBa 440 / 5 kg XBa 640 / 7 kg Top mounted separator Steel.0254 1. galvanised 1. Fax +49 (0) 48 21 / 7 71-274 www.0254 1.2 kg GEV 161 B 4.4571 + Brass SIHI-Part No. LEL 91.