Mildly Corrosive Chemical Transfer Pumps

4-MD Series Magnetic Drive Pump

Mildly Corrosive Chemical Transfer Pumps

4-MD Series Magnetic Drive Pump

The Little Giant 4-MD series features leakproof, seal-less magnetic drives designed for in-line, non-submersible use. This series is known for its excellent wear and corrosion resistance in the circulation of mildly corrosive acids, alkalis, solvents, brine, plating solutions, sterile solutions, and other mildly corrosive chemicals and solutions compatible with the pump's material of construction.

Features & Benefits

  • 1/12 hp open FC motor
  • Glass-filled polypropylene magnet housing
  • Glass-filled polypropylene volute
  • 1.1 specific gravity
  • Nitrile O-ring
  • Titanium thrust washers and shaft


The 4-MD Series features a 1/12 horsepower open FC motor with 1/2" FNPT inlet x 1/2" MNPT outlet and maximum head of 23.7' capabilities. Shaft and thrust washers are titanium for excellent wear resistance and trouble-free service. Pumping heads are easily rotated, cleaned, or serviced with no special tools required. The spindle shaft is supported at both ends to prevent impeller damage during the start and stop of the pump.


Capacity 660 gph @ 1'
Shut Off 23.7' (7.2 m)
Max. Liquid Temp. 150 °F (66 °C)
Discharge 1/2" MNPT (12.7 mm)
Impeller Glass-filled polypropylene & Ceramagnet "A" (Barium Ferrite)
Electrical 115 V, 60 Hz, 2.4 A
230 V, 60 Hz, 1.4 A



115 or 230 V, 60 Hz

Head GPH (LPH)
1' 690 (2611.9)
3' 660 (2498.4)
6' 600 (2271.2)
9' 545 (2063)
15' 390 (1476.3)

Order Information

4-MD Series Chemical Transfer Pump

Item Model Volts Maximum Flow Rate - 60Hz Shut-Off Flow Rate At 1ft
582002 4-MD 115 VAC 11.5 gpm / 690 gph 23.7 ft 11.5 gpm / 690 gph

Support Materials


Title Type Size
Mag Drive Selection Tool PDF 3.28 MB


Title Type Size
Industrial Product Catalog PDF 12.23 MB


Title Type Size
Chemical Resistance Chart PDF 0.96 MB