Little Giant Magnetic Drive Pumps
The most important feature of Magnetic Drive Pumps made by Little Giant is that the drive shaft of the motor is not mechanically connected to the impeller, line in most pumps, but magnetically. This feature is especially useful when pump is used for applications where sudden short-term blockage of pump may occur from sludge debris, etc. Such event will not impact the pump and will allow for the drive shaft to rotate even if the impeller is blocked.
Little Giant Magnetic drive pumps are available in various configurations (voltage, motor HorsePower rating, cord length) and marked SC, MC or HC for Semi-Corrosive, Mildly-Corrosive and Highly-Corrosive fluids accordingly.
Popular models in this category include 2-MD-SC, 2-MD-HC, 3-MD-SC, 3-MD-HC and 3-MD-MT-HC. Replacement magnetic drive pump heads are also available in this category.
How to select a Little Giant Magnetic Drive Pump for a specific application:
As with any other pump, a magnetic drive pump is selected based on the flow requirements (GPM, or Gallons Per Minute) and system pressure drop (system head, typically is ft. of head). Using these parameters and a pump curve chart, a proper size pump is selected. Depending on how aggressive or acidic the fluid is, the SC, MC or HC model is specified.
How to check pump's compatibility with a specific chemical:
Little Giant provides a Chemical Resistance Chart which will help to determine compatibility of a specific pump model with a given chemical or fluid type.
Note: when using compatibility chart, refer to the pump materials below:
MD series (for mildly corrosive liquids) magnetic drive pumps - feature polypropylene parts.
MD-SC (semi-corrosive) - polypropylene, ceramic and Nitrile parts.
MD-HC (highly corrosive) - polyphenylene sulfide, flouroelastomer (FKM), carbon and ceramic.
MD-CK (highly corrosive) - polyvinylidene flouride, PTFE, carbon, ceramic and fluoroelastomer (FKM).