Catalogs >
Flowserve SIHI Pumps >
Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800
10Pages

Catalog excerpts

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 1

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 VACUUM TECHNOLOGY LEH LE 5A 133.71330.52.01 E 03/2008 Pressure range: 33 to 1013 mbar Suction volume flow: 440 to 2050 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 Internal service liquid return; adjustable from the outside protection against cavitation as standard incorporated dirt drain incorporated central drain no metallic contact of the rotating parts The SIHI liquid ring vacuum pumps LEH 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. Fields of application are for example: chemistry and pharmacy for distilling and degassing, electric industry for impregnation and drying plastics industry for degassing etc. 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 LEH 1200 LEH 1500 LEH 1800 Speed 50 Hz 60 Hz rpm 975 1175 Max. compression over pressure bar 1,5 1,2 Max. admissible pressure difference bar 1,5 1,2 Hydraulic test (over pressure) bar 3 Moment of inertial of the rotating pump parts and of the water filling kg . m² 2,6 3,05 3,5 Sound pressure level at a suction pressure of 80 mbar dB (A) 79 Min. pulley diameter permissible in case of V-belt drive mm 355 500 Max. gas temperature dry saturated °C °C 200 100 Service liquid max. admissible temperature max. viscosity max. density °C mm²/s kg/m³ 80 90 1200 volume up to shaft level liter 30 35 39,5 Max. flow resistance of the heat exchanger bar 0,2 The combination of several limiting values is not admissible.

Open the catalog to page 1

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 2

2 Material design MATERIAL DESIGN Item. COMPONENTS 0B 4B 10.60, 10.70 Casing 0.6025 1.4408 10.90 Central body 1.0553 1.4571 13.70, 13.71 Guide disk 0.6025 1.4408 21.00 Shaft 1.0503 23.50 Vane wheel impeller 0.7043 1.4517 43.30, 43.31 Standard mechanical seal Cr-steel / carbon / Perbunan Cr Ni Mo-steel / carbon / Viton 46.10 Gland packing Soft packing 52.40 Shaft sleeve 1.4027.05 1.4571 Sectional drawing LEH 1200, LEH 1500, LEH 1800

Open the catalog to page 2

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 3

3 Suction volume flow and power absorption LEH 1200 0 200 400 600 800 1000 1200 1400 1600 10 100 1000 suction pressure suction volume flow 975 rpm m³/h 1175 rpm 40 60 80 200 400 mbar LEH 1200 0 10 20 30 40 50 10 100 1000 suction pressure power absorption kW 975 rpm 1175 rpm 40 60 80 200 400 mbar LEH 1200 The operating data are applicable under the following conditions: • pumping medium: - dry air: 20°C - water vapour saturated air: 20°C • service liquid: - water: 15°C Compression pressure 1013 mbar (atmospheric pressure) The suction volume flow is applied to the suction pressure Tolerance...

Open the catalog to page 3

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 4

4 Suction volume flow and power absorption LEH 1500 0 500 1000 1500 2000 10 100 1000 suction pressure suction volume flow 975 rpm 1175 rpm m³/h 40 60 80 200 400 mbar LEH 1500 0 10 20 30 40 50 60 10 100 1000 suction pressure power absorption kW 975 rpm 1175 rpm 40 60 80 200 400 mbar LEH 1500 The operating data are applicable under the following conditions: • pumping medium: - dry air: 20°C - water vapour saturated air: 20°C • service liquid: - water: 15°C Compression pressure 1013 mbar (atmospheric pressure) The suction volume flow is applied to the suction pressure Tolerance of the...

Open the catalog to page 4

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 5

5 Suction volume and power absorption LEH 1800 0 1000 2000 10 100 1000 suction pressure suction volume flow 975 rpm 1175 rpm m³/h 40 60 80 200 400 mbar LEH 1800 0 10 20 30 40 50 60 70 10 100 1000 suction pressure power absorption kW 975 rpm 1175 rpm 40 60 80 200 400 mbar LEH 1800 The operating data are applicable under the following conditions: • pumping medium: - dry air: 20°C - water vapour saturated air: 20°C • service liquid: - water: 15°C Compression pressure 1013 mbar (atmospheric pressure) The suction volume flow is applied to the suction pressure Tolerance of the operating data 10%...

Open the catalog to page 5

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 6

6 Dimension table LEH 1200, LEH 1500, LEH 1800 weight a m1 m2 o3 q3 app. kg LEH 1200 490 651 571 1150 632 479 LEH 1500 560 721 641 1220 667 519 LEH 1800 615 776 696 1275 695 549 flange connections to DIN 2501 PN 10 DN 100 125 k 180 210 D 220 250 number x d2 8 x 18 8 x 18 N 1 = gas inlet DN 125 N 2 = gas outlet DN 125 uB = connection for service liquid G 1¼ uc = connection for protection against cavitation G ¼ ue = drain connection G ½ um1 = connection for drain valve G ½ use = connection for dirt drain G ½

Open the catalog to page 6

Liquid ring vacuum pumps LEH 1200, LEH 1500, LEH 1800 - 7

7 Arrangement drawing LEH 1200, LEH 1500, LEH 1800 with overhead liquid separator N 1 = gas inlet DN 125 uc = connection for protection against cavitation G ¼ N 2 = gas outlet DN 200 um = connection for pressure gauge G ½ uA = connection for liquid drain DN 65 ut = connection for thermometer G ¼ uF = connection for fresh liquid DN 40 electric motor 50 Hz weight size kW e1 e2 e3 l l1 m o1 * w1 * app. kg IP 55 EEx e ll T3 LEH 1200 225 M 30 - 70 640 1370 1650 355 70 843 2043 1100 250 M - 33 690 1450 1750 930 2130 1225 LEH 1500 250 M 37 - 370 50 2200 1260 280 S - 40 50 1004 2274 1455 LEH 1800...

Open the catalog to page 7