Product Overview
The ARO 66605J-344 is a pneumatically driven Air-Operated Double Diaphragm (AODD) pump engineered by ARO (Ingersoll Rand) for reliable transfer of fluids in demanding industrial environments. Unlike positive-displacement rotary hydraulic pumps, this unit operates on a reciprocating diaphragm principle: compressed air is alternately directed to two opposing diaphragm chambers via a pilot-operated air distribution valve, creating a balanced, self-priming pumping action. The 66605J-344 belongs to the ARO EXP series 1/2″ non-metallic family, featuring a polypropylene body with PTFE (Teflon) elastomer diaphragms and ball valves, making it suitable for chemically aggressive and shear-sensitive media. Its sealless, stall-free design allows it to run dry without damage and to handle viscous, abrasive, or solids-laden fluids, positioning it as a versatile workhorse in process, chemical, and utility circuits where electric-driven pumps are impractical or unsafe.
Technical Specifications
| Parameter | Specification / Feature |
|---|---|
| Component Type | Air-Operated Double Diaphragm Pump (AODD) |
| Model Designation | ARO 66605J-344 |
| Port Size | 1/2 in (12.7 mm) NPT / BSP inlet & discharge |
| Body / Wetted Materials | Polypropylene body, PTFE diaphragms & ball valves |
| Operating Pressure | Up to 100 psi (6.9 bar) air inlet |
| Max Flow Rate | Approx. 13 GPM (49 LPM) |
| Air Inlet Connection | 1/4 in NPT female |
| Mounting & Connection | Standard ISO / Manufacturer Interface |
Engineering Features & Advantages
- Precision Performance: Balanced double-diaphragm design delivers smooth, pulsation-dampened flow with excellent self-priming and dry-run capability, ideal for shear-sensitive and solids-laden fluids.
- Industrial Reliability: Sealless, stall-free air distribution system eliminates mechanical seals and motors, reducing maintenance downtime in continuous industrial operation.
- Chemical Compatibility: Polypropylene wetted body with PTFE diaphragms and check balls resists aggressive acids, bases, and solvents across a wide pH range.
- Direct Fit Replacement: Exact dimensional and functional compatibility with original ARO 66605J-344 OEM standards for drop-in service.
Typical Industrial Applications
The ARO 66605J-344 is widely deployed in chemical transfer and dosing lines, wastewater and slurry handling, paint and coating circulation systems, and general plant utility service where compressed air is available and electric pump installation is restricted. Its compact 1/2″ footprint and chemically resistant construction also make it a common choice for drum unloading,
PRODUCT IMAGES
ARO 66605J-344 Air-Operated Double Diaphragm Pump
âš¡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the genuine ARO 66605J-344 1/2″ Air-Operated Double Diaphragm Pump. This USA-made pneumatic pump features a non-metallic polypropylene body with PTFE diaphragms, delivering leak-free, reliable fluid transfer for heavy-duty industrial systems.