Liquid ring vacuum pumps in compact design

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Liquid ring vacuum pumps in compact design LEM 26, LEM 51 Pressure range: Suction volume flow: 33 to 113 mbar 3 to 58 m³/h CONSTRUCTION TYPE SIHI liquid ring vacuum pumps are displacement pumps of

1 Liquid ring vacuum pumps in compact design LEM 26, LEM 51 Pressure range: Suction volume flow: 33 to 113 mbar 3 to 58 m³/h CONSTRUCTION TYPE 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 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 9 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 unit LEM 26 LEM 51 speed 5 Hz 6 Hz Max. compression over pressure bar,3 Max. admissible pressure difference bar 1,1 Hydraulic test (over pressure) bar 3 Moment of inertial of the rotating pump parts and of the water filling Sound pressure level at a of 8 mbar Max. gas temperature dry saturated rpm kg. m²,3,5 db (A) Service liquid max. admissible temperature max. viscosity max. density C mm²/s kg/m³ volume up to shaft level liter,4,6 Max. flow resistance of the heat exchanger The combination of several limiting values is not admissible. C C bar,2 VACUUM TECHNOLOGY LEM LE 2A E 12/99

2 Material design MATERIAL DESIGN Item COMPONENTS A 4B 1.1 Casing Guide disk Cover Vane wheel impeller Standard mechanical seal Cr-steel / carbon / Perbunan Cr Ni Mo-steel / carbon / Viton Valve plate PTFE Sectional drawing LEM 26, LEM 51 Fresh water requirements in [m³/h] dependent on, speed, mode of operation and difference in temperature [mbar] pump KB KB KB KB difference in FB difference in FB difference in FB difference in speed [rpm] LEM 26 29,4,7,14,39,5,9,16,36,5,9,15,3,5,8,14,28 35,6,1,18,7,11,19,7,11,18,7,11,18 LEM 51 29,7,13,23,48,9,15,24,42,9,14,23,36,9,14,22,34 35,11,17,28,12,19,28,12,18,26,12,18,25 FB = fresh liquid service KB = combined liquid service with service water 1 C, 5 C, 2 C warmer than the fresh water. FB 2

3 Suction volume flow and power absorption LEM 26 4 m³/h LEM mbar 1 1,5 1,5 LEM mbar 1 The operating data are applicable under the following conditions: pumping medium: - dry air: 2 C - water vapour saturated air: 2 C service liquid: - water: 15 C Compression pressure 113 mbar (atmospheric pressure) The suction volume flow is applied to the Tolerance of the operating data 1% Max. fresh water need with lowest 3

4 Suction volume flow and power absorption LEM 51 8 m³/h LEM mbar LEM mbar 1 The operating data are applicable under the following conditions: pumping medium: - dry air: 2 C - water vapour saturated air: 2 C service liquid: - water: 15 C Compression pressure 113 mbar (atmospheric pressure) The suction volume flow is applied to the Tolerance of the operating data 1% Max. fresh water need with lowest 4

5 Dimension table LEM 26 electric motor IP 55 size abt. kg 5 Hz 6 Hz LEM 26 8,75 1,1 21 other motors on request * dimension dependent on the motor make N 1 = gas inlet G 1 N 2 = gas outlet G 1 u B = connection for service liquid G ¼ u c = connection for protection against cavitation G ¼ u e = drain connection G ¼ u m = connection for pressure gauge G ¼ Dimension table LEM 51 electric motor size m 1 m 2 w 1 * abt. kg 5 Hz 6 Hz LEM 51 9 S 1, L - 2, other motors on request * dimension dependent on the motor make N 1 = gas inlet G 1 N 2 = gas outlet G 1 u B = connection for service liquid G ¼ u c = connection for protection against cavitation G ¼ u e = drain connection G ¼ u m = connection for pressure gauge G ¼ 5

6 Arrangement drawing LEM 26, LEM 51 electric motor IP 55 size a 2 h h 1 r abt. kg 5 Hz 6 Hz LEM 26 8,75 1, LEM 51 9 S 1, L - 2,2 33 N 1 = gas inlet G 1 N 2 = gas outlet G 1¼ u A = connection for liquid drain G ¾ u F = connection for fresh liquid G ¼ u c = connection for protection against cavitation G ¼ 6

7 Data regarding the pump size - order hints series + size hydraulics + bearings shaft sealing material design casing seal A Z hydraulick A two grease lubricated antifriction bearing arranged in the motor AAE AA1 mechanical seal O-rings Perbunan as AAE, but O-rings Viton A 4B main parts GG main parts Cr Ni Mo-cast steel 7 O-rings Teflon cord LEM 26 LEM 51 AZ AAE, AA1 A, 4B 7 Motor selection table Y-voltage motor enclosure IP 55 5 Hz -voltage power size Y-voltage motor enclosure IP 55 6 Hz -voltage LEM ,75 8 AW ,1 8 BW LEM ,5 9 S AW ,2 9 L BW power size motordesign. motordesign. Example for ordering: The construction size LEM 26 AZ AAE A 7 with,75 three-phase ac motor (5 Hz, 23 V ) has the complete order number: LEM 26 AZ AAE A 7 AW If motors with the other voltage or frequency are required a special information should be given. On delivery the point ( ) in the fourth place of the type code is replaced by a letter in the factory. Accessories LEM 26, LEM 51 Recommended accessories LEM 26 LEM 51 Overhead liquid separator material design service liquid line 13 / galvanized material design 72 / St 37- cavitation protection line material design 72 / St 37- SIHI-gas ejector type XBa 244 2,8 kg SIHI part No SIHI part No SIHI part No at service liquid temperature 15 C GEV 25 A GEV 5 A at service liquid temperature 3 C GEV 25 A GEV 5 A Ball type non-return valve size / G 1 /,7 kg material design 776 / brass SIHI part No Any changes in the interest of the technical development are reserved. Sterling SIHI GmbH Lindenstraße 17, D Itzehoe, Germany, Telephone +49 () / , Fax +49 () /

Liquid ring vacuum pumps in compact design

Liquid ring vacuum pumps in compact design, Pressure range: Suction volume flow: 33 to 113 mbar 3 to 58 m³/h CONSTRUCTION TYPE SIHI liquid ring vacuum pumps are displacement pumps of uncomplicated and