ARO LM 2203A LM Series Piston Pumps, Built tough to fit the way you work. LM Series piston pumps deliver unmatched industrial-strength performance for pumping fluids with sizes to fit small (16-gal / 35-lb, 60.5 L / 15.8 kg) or large (275-gal / 400-lb, 1040.9 L / 181.4 kg) containers. Working flow rates range from two to six gallons per minute. Pumps are offered from 3:1 to 50:1 ratios, in order to meet the requirements of any application.
Pump’s patented design improves flow, reduces pulsation, and extends service life
Offers simple self-service maintenance due to advanced design with 50% fewer parts
Reduces service time, due to in-line service design with no special tools required
Features stall-free, ice-free air motor with tough, durable housing
Our LM series is ideal for pumping grease, motor oil, gear oil, or transmission fluid. The simple, durable design allows for piston pump service by any owner or qualified technician. Also look for our convenient grease and oil pump packages.
Flexibility — LM pumps can be serviced in-line and feature a rugged all-weather design (3:1 pumps only)
Dependability — Valving design uses no trip rods or push pins that usually break
Durability — Our stall-free, ice-free air motor is contained in a rugged housing
Commitment — Ingersoll Rand pumps come with a 5-year warranty
| Model | Working flow gpm (l/m) | Free flow gpm (l/m) | Fluid inlet / outlet NPTF (mm) | Container size gal (L) | Air inlet in (mm) | |
| 3:1 PISTON PUMP | ||||||
| LM2203A-11-C | (-12 - C = BSP Thread) | 6 (23) | 9 (34) | 3/4" / 1/2" (19 / 13) | Stub | 1/4" (6) |
| LM2203A-31-C | (-32 - C = BSP Thread) | 6 (23) | 9 (34) | 3/4" / 1/2" (19 / 13) | 16 (60.6) | 1/4" (6) |
| LM2203A-41-C | (-42 - C = BSP Thread) | 6 (23) | 9 (34) | 3/4" / 1/2" (19 / 13) | 55 (208.2) | 1/4" (6) |
| LM2203A-51-C | (-52 - C = BSP Thread) | 6 (23) | 9 (34) | 3/4" / 1/2" (19 / 13) | 275 (1040.9) | 1/4" (6) |
| 5:1 PISTON PUMP | ||||||
| LM2305A-11-B | (-12 - B = BSP Thread) | 6 (23) | 9 (34) | 1-1/2" / 1/2" (38 / 13) | Stub | 1/4" (6) |
| LM2305A-31-B | (-32 - B = BSP Thread) | 6 (23) | 9 (34) | 1-1/2" / 1/2" (38 / 13) | 16 (60.6) | 1/4" (6) |
| LM2305A-41-B | (-42 - B = BSP Thread) | 6 (23) | 9 (34) | 1-1/2" / 1/2" (38 / 13) | 55 (208.2) | 1/4" (6) |
| LM2305A-51-B | (-52 - B = BSP Thread) | 6 (23) | 9 (34) | 1-1/2" / 1/2" (38 / 13) | 275 (1040.9) | 1/4" (6) |
