Catalogs >
Flowserve SIHI Pumps >
LEM 90, LEM 125, LEM 150, LEM 250

LEM 90, LEM 125, LEM 150, LEM 250
8Pages

Catalog excerpts

Liquid ring vacuum pumps with magnetic coupling LEM 90, LEM 125, LEM 150, LEM 250Pressure range: 33 to 1013 mbarSuction volume flow: 20 to 200 m3/h CONSTRUCTION TYPE SIHI liquid ring vacuum pumps with magnetic coupling are displacement pumps of simple and robust design meeting high demands on tightness. Two liquid surrounded sleeve bearings of tungsten and silicon carbide (WC / SiC) bear the shaft axially and radial. The application of high-grade magnetic materials with high density of energy guarantees the transmission of the nominal torque and safety during the start-up phase and in case of overload. The modular magnetic system makes possible the optimal adaptation to different operating conditions. The main components of the pumps mostly are equal to those of the standard pumps, the connecting dimensions are identical. The material design can be adapted to the operating conditions. APPLICATION The vacuum pumps with magnetic coupling are suitable for handling and exhausting of nearly all dry and humid gases. They are applied wherever extremely high demands on tightness exist which cannot be met by pumps with shaft seals. NOTE The main fields of application are in the chemical and pharmaceutical industry where polluting , unhealthy or dangerous media are to be handled. Many different process vapours can be exhausted and the generated condensate possibly can be used as service liquid for the pump. For that purpose the service liquid, separated from the gas in a liquid separator, is run in a circuit. For the cooling of the system a heat exchanger is arranged in the circulating liquid line. GENERAL TECHNICAL DATA Pump type Nominal speed Power of the electric motor Max. compression over pressure Max admissible pressure difference Hydraulic test (over pressure) Moment of the inertial of the rotating pump parts and of the water filling (without outer magnet) Sound pressure level at a suction pressure of 80 mbar Max. gas temperature dry saturated Service liquid max. admissible temperature max. viscosity max. density volume up to shaft level Max. flow resistance of the heat exchanger Leakage The combination of several limiting values is not admissible. 1) normally The dimensioning of the magnetic coupling and of the electric motor depends on the physical data of the service liquid and of the suction and discharge pressure of the pump VACUUM TECHNOLOGY LEM MAGNET LE 6A 05/2015

Open the catalog to page 1

Suction volume flow and power absorption LEM 90, 125, 150, 250 with magnetic coupling suction volume flow suction pressure power absorption suction pressure The operating data are applicable under the following conditions:  pumping medium: - dry air: - water vapour saturated air : service liquid: Compression pressure 1013 mbar (atmospheric pressure) The suction volume flow is applied to the suction pressure Tolerance of the operating data 10% Max. fresh water need with lowest suction pressu

Open the catalog to page 4

* dimensions dependent on the motor make flange connections see page 6 N 2 = gas outlet DN 40 ub = connection for service liquid G % Uc = connection for protection against cavitation G 3/8 Ue = drain connection G 3/8 Use = connection for dirt drain G 3/8 Um = connection for pressure gauge G 3/8 Umi = connection for drain valve G 3/8 * dimension dependent on the motor make flange connections see page 6 ua = connection for liquid drain G 1 uf = connection for fresh liquid G % uc = connection for protection against cavitation G V8

Open the catalog to page 5

weight without motor app. 124 kg * dimension dependent on the motor make connection for service liquid G A connection for protection against cavitation G % drain connection G A connection for dirt drain G A connection for vent cock G A connection for pressure gauge G A connection for drain valve G A ua = connection for liquid drain DN 32 uf = connection for fresh liquid G A uc = connection for protection against cavitation G % * dimension dependent on the motor make

Open the catalog to page 6

Fresh water requirements in [m3/h] dependent on suction pressure, speed, mode of operation and difference in temperature Example for ordering: The construction size LEM 150 AF 2AZ 4B 4 with 5,5 kW three-phase ac motor (50 Hz, 400 VA) 1450 rpm has the complete order number: LEM« 150 AF 2AZ 4B 4 NB 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.

Open the catalog to page 7

Recommended accessories Upright liquid separator material design 130 type / weight / SIHI part No. service liquid line material design cavitation protection line material design 072 / St 37-0 discharge line material design SIHI-gas ejector at service liquid temperature 15 °C at service liquid temperature 30 °C SIHI-ball type non-return valve material design type weight base plate material design size power weight size power weight_ type / weight Any changes in the interest of the technical development are reserved.

Open the catalog to page 8

LEM 90, LEM 125, LEM 150, LEM 250 8Pages

Catalog excerpts

All Flowserve SIHI Pumps catalogs and technical brochures

LEM 90, LEM 125, LEM 150, LEM 250
8Pages