Pumps with magnetic coupling
Magnetically coupled centrifugal pump LEMP - 3D Mode of operation
Centrifugal pump type LEMP
Due to the hermetically sealed design, magnetically coupled pumps are ideal for use with crystallising, toxic, flammable and environmentally hazardous media.
The can between the two magnetic coupling parts seals the pumped medium from the outside. A mechanical seal is therefore not required.
As a result, the magnetic drive pumps are much more wear-resistant and therefore usually completely maintenance-free. Furthermore, the use of a sealing pressure system can be dispensed with.
The can between the two magnetic coupling parts seals the pumped medium from the outside. A mechanical seal is therefore not required.
As a result, the magnetic drive pumps are much more wear-resistant and therefore usually completely maintenance-free. Furthermore, the use of a sealing pressure system can be dispensed with.
The air outlet unit (component in the middle of the illustration) can be easily dismantled and replaced.
Areas of application:
Areas of application:
- Particularly hazardous substances (e.g. biowaste, acids).
- Very valuable products
- Particularly odour-intensive media
- Generally no leakage tolerated
- In ATEX zones
- Hermetically tight according to TA-Luft
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- 100 % flushed interior
- Cleanability CIP/SIP
- Dead space free
- 100% residue drainable
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- Coupling half inside, completely encapsulated
- containment can: material of great importance due to eddy current losses e.g. 1.4571, titanium, 1.4539, Hastelloy C4 or ceramics
- Plain bearing, medium flushed => standard material SiC/SiC
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Very easy disassembly of the pump part from the motor.
Monitoring:
Monitoring:
- Motor monitoring by means of PTC thermistors and/or fuse protection of the current consumption.
- Temperature monitoring, e.g. at the containment can by means of PT100
- Dry run protection by means of Liquiphant in the suction line or by means of level monitoring in the tank (inlet)
- Monitoring of the flow rate
- Pressure monitoring
- Vibration control
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Due to the narrow gaps in the area of the SSiC bearings and the containment can, media containing solids and viscous media cannot be conveyed. Due to the eddy current losses in the magnetic field of the magnetic coupling, the overall efficiency is slightly reduced.
Operating data:
Media: water-like up to approx. 200 mPas
Min. temperature: -40 °C
Max
. temperature.
Temperature: 200 °C
Nominal pressure: PN16 to PN160
Flow rate: up to approx. 150 m3/h Delivery
pressure: up to approx. 100 m
ATEX: II2G and II2D
Operating data:
Media: water-like up to approx. 200 mPas
Min. temperature: -40 °C
Max
. temperature.
Temperature: 200 °C
Nominal pressure: PN16 to PN160
Flow rate: up to approx. 150 m3/h Delivery
pressure: up to approx. 100 m
ATEX: II2G and II2D
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Many of the pumps in the SAWA pump range feature hermetically sealed magnetic couplings. These pumps are also designed and manufactured so that they can be used easily for hygienic and sterile applications.
Advantages
Because of their hermetically sealed design, magnetically coupled pumps are ideal when used for crystallising, toxic, ammable and en- vironmentally hazardous liquids. The contain- ment shell between the two parts of the mag- netic coupling seals off the pumped medium to the outside. A mechanical seal is thus not re- quired. The magnetic coupling pumps are thus far more resistant to wear and consequently are generally entirely maintenance-free. A seal- ing-pressure system is therefore not necessary.
Restrictions
Media containing solids and viscous media can- not be pumped owing to the narrow gaps in the area of the SSiC bearings and the containment shell. Eddy-current losses in the magnetic eld of the magnetic coupling reduce the overall ef - ciency slightly.
Possible applications
- In ATEX zones: thanks to the separation of the pump and motor by means of a magnetic coupling an additional exible coupling is not necessary.
- TA-Luft (German Technical Guidelines on Air-Quality Control): use of the hermetically sealed magnetic coupling allows unprob- lematic pumping of toxic media relevant to TA-Luft. The pumps are also ideal for use with media with unpleasant odours, highly volatile, ammable and highly pure media and media which crystallise in contact with air.
- Hygienic and sterile applications: magnetic coupling pumps are suitable for CIP clean- ing and SIP sterilisation.
Pump monitoring options
- motor monitoring by means of PTC thermistor and/or safeguarding current consumption
- temperature monitoring, e.g. on the magnetic coupling containment shell by means of PT100
- protection against dry running by means of Liq- uiphant in the suction line or by means of level monitoring in the tank (inlet)
- monitoring the ow rate
- pressure monitoring
- vibration monitoring
Pump types available with magnetic coupling
- Type HD: HDM88, HDM160, HDM190, HDM220
- Type LE: LEM130, LEM150, LEM170, LEM190, LEM190B
- Type LES: LESM170, LESM190, LESM190B
- Type ZA/ZAL: ZALRM18, ZALM21, ZAM21, ZAM21B
- Type MP: MP68, MP73, MP78, MP92
- Type ZR: ZRP3
Optional forms
- including residual drainage in pump body or pump cover
- inducer on LE and ZA/ZAL
- temperature ranges from minus 30°C to 200°C
- system pressures up to max. PN 160
- viscosities up to max. 200 mPas
