Air-operated Double Diaphragm Pumps
3-inch Metal AODD Pump Series
A flange-connected 3-inch air-operated double diaphragm pump that delivers up to 275 gpm (1041 L/min, 62.46 m³/h) and handles fluids to 25,000 cPs, with leak-free flanged porting and an epoxy coating for the most demanding metal-pump duty.
Selection support
- Share flow rate, pressure, medium, temperature and material requirements.
- We can support pump selection, dosing package configuration and spare parts matching.
- Detailed English datasheets and quotations are available for priority models on request.
Technical details
Flange-connected pump body with no fluid leakage
- Larger fluid passages and higher flow rate — flow up to 275 gpm (1041 L/min)
- Handles fluid viscosities up to 25,000 cPs
- Epoxy coating withstands harsh working environments
Technical Specifications
| Maximum working fluid pressure | 120 psi (0.84 MPa, 8.4 bar) |
| Air inlet pressure range | 20-120 psi (1.4-8.4 bar, 0.14-0.84 MPa) |
| Maximum air consumption | 325 scfm (9.1 m³/min) |
| Air consumption at 70 psi / 100 gpm | 120 scfm (1.26 m³/min) |
| Maximum free-flow rate | 1,041 L/min (62.46 m³/h) |
| Maximum cycle rate | 135 cpm |
| Displacement per cycle | 2.0 gal (7.6 liter) |
| Maximum suction lift, dry (DK3666) | 8 ft (2.4 m) |
Values vary depending on the combination of seats, balls and diaphragms.
| Maximum solids handling | 3/8 in. (9.4 mm) |
| Noise level at 70 psi and 200 cpm | 79 dBA |
| Air inlet size | 3/4 in. NPT (f) |
| Fluid inlet size | 3 in. ANSI 4-bolt flange / DIN 8-bolt flange |
| Fluid outlet size | 3 in. ANSI 4-bolt flange / DIN 8-bolt flange |
| Wetted parts | Aluminum, PTFE, Santoprene, Hytrel, plated steel, acetal, SST |
| Weight | 150 lbs (68 kg) |
| Operating manual | 308-639 |