ARO
ARO 6661U3-344-C — 1-1/2" Polypropylene Diaphragm Pump, PTFE Diaphragm
ARO 6661U3-344-C — 1-1/2" Polypropylene Diaphragm Pump, PTFE Diaphragm
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The ARO 6661U3-344-C is a 1-1/2" air-operated double-diaphragm (AODD) pump from ARO's Pro Series 1-1/2" non-metallic line — self-priming, run-dry capable, and rated to about 100 GPM on compressed air up to 120 psi.
This build runs an all-polypropylene wetted path — fluid caps, manifold and seats — with PTFE / Santoprene diaphragms and PTFE check balls. PTFE gives the broadest chemical compatibility in the line — the build to reach for with corrosive acids, caustics and solvents that attack rubber elastomers. The cast iron center section adds durability for demanding duty cycles. Bolted construction keeps the fluid path leak-tight, and ARO's patented unbalanced air valve is designed to resist stalling and ice-up.
It is built for higher-volume transfer, filling, recirculation and supply in chemical, industrial and water/wastewater service. Not sure this build suits your fluid? Send us your application details and we'll point you to the right part number.
KAD is a Texas-based seller — order online, ship from the US with a short lead time, and reach US-based support if you have a sizing or compatibility question before you buy.
Specifications
| Brand | ARO (Ingersoll Rand) |
| Model / MPN | 6661U3-344-C |
| Pump type | Air-operated double diaphragm (AODD) |
| Port / inlet size | 1-1/2 in (ANSI/DIN flange) |
| Max flow | 100 GPM (378.5 LPM) |
| Max fluid pressure | 120 psi (8.3 bar) |
| Max air inlet pressure | 120 psi (8.3 bar) |
| Solids handling | 1/4 in (6.4 mm) |
| Diaphragm material | PTFE / Santoprene |
| Ball (check valve) material | PTFE |
| Seat material | Polypropylene |
| Fluid caps & manifold | Polypropylene (with cast iron center section) |
| Max fluid temperature | Up to 175°F (79°C) — limited by the polypropylene wetted path |
| Sound level | ~77.7 dB(A) |
| Weight | ~85 lb (38.5 kg) |
| Displacement | 0.67 gal (2.54 L) per cycle |
Datasheet: ARO 1-1/2" Non-Metallic Diaphragm Pump — Sales & Engineering Data (PDF)
Browse all air-operated diaphragm pumps, or all pumps, at KAD.
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