Gear pumps are rotary displacement pumps for liquids used in the chemical industry, water treatment, and food production for pumping and dosing.
The patented MARCH TEF-MAG® series chemical gear pumps (US Patent No. 10,189,005 B2; European Patent No. EP 3786416) are magnetically coupled, external gear pumps. All wetted components are made entirely of non-metallic materials and comply with ATEX Directive 2014/34/EU. These pumps are specifically designed for robust operation with highly corrosive chemicals.
Gear pumps generate an almost pulsation-free forced flow according to the positive displacement principle with high differential pressure. The pump housings of the TEF-MAG® series are machined from robust solid material and corrosion-resistant plastics such as PP, PVDF, PEEK, PVC or PE. Even the wetted shafts are made of non-metallic engineering ceramics such as SSiC or Al203 which represents the best possible chemical resistance. The gears are made of high performance plastics which have self-lubricating properties. Thus the pumps of the TEF-MAG® series are also capable of pumping low viscosity liquids without any problems. Power is transmitted from the drive to the pump by a force-locked connection without contact by means of strong NdFeB permanent magnets. As a result the pump operates without any mechanical shaft seal ensuring safe and leak-free pumping of corrosive, toxic and explosive liquids. Pumps for hazardous areas of zones 1 and 2 can be supplied in corrosion-resistant and conductive plastics.
Features
Volumetric, rotary positive displacement pump
External gear pump
Wetted parts completly non-metallic
Chemical resistant
Almost pulsation-free
Leak-free
Magnetically driven
Low flow
High differential pressure
Self priming (wet)
Low NPSHR
Constant control behaviour
Integrated frequency converter available
Pump for ATEX 2014/34/EU
Technical data
Nominal speed:
1450 1/min (50Hz)
Nominal flow rate:
TEF-MAG® 200:
200 l/h
TEF-MAG® 1500:
1500 l/h
TEF-MAG® 3500:
3500 l/h
Discharge pressure:
max. 10 bar
System pressure:
max. 16 bar
Temperature:
max. 120°C
Density:
max. 1,9 kg/dm³
Viscosity:
max. 5000 cP
Materials
Housing:
PP, PVDF, PVDF-EL, PVC, PEEK, PE
O-Ring:
EPDM, Viton, Kalrez
Shaft:
Al2O3 >99%, SSiC
Gears:
PEEK-HPV, PTFEC, PVDF-CFR, PPS-HPV
Bearing:
PTFEC, Carbon graphite, PPS-HPV, PEEK-HPV
Applications
The TEF-MAG® gear pumps have proven their performance in every application that requires lower flow rates at high discharge pressure, when corrosive liquids must be metered.
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