PD20S-ACP-STT-B ARO 2" Cast Iron Metallic Expert Series Air Operated Double Diaphragm Pump
ARO
$6,617.86
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ARO
PD20S-ACP-STT-B ARO 2" Cast Iron Metallic Expert Series Air Operated Double Diaphragm Pump
P/N PD20S-ACP-STT-B ARO 2" Cast Iron Metallic Expert Series Air Operated Double Diaphragm Pump
The ARO PD20S-ACP-STT-B is a 2-inch Metallic Expert Series air-operated double-diaphragm pump engineered for high-volume fluid transfer, filling, recirculation, and batching in demanding industrial markets such as paint, ceramic, chemical, and oil & gas. Featuring a durable cast iron wetted casing paired with a stainless steel center section, 316 stainless steel valve seats, PTFE check balls, and PTFE / Santoprene® diaphragms, it combines rugged structural strength with broad chemical compatibility.
Built for reliable pneumatic operation, this pump features ARO's patented SimulShift™ "unstallable" air valve and Quick Dump™ exhaust technology to eliminate stalling and prevent cold-weather freezing. Its bolted construction ensures leak-free fluid containment and simplified field maintenance.
Application suitability should be confirmed based on fluid chemical compatibility, operating temperature, viscosity, and process conditions. Note: Maximum temperature limits are based on mechanical stress only; certain chemicals can significantly reduce safe operating ranges.
Operator's Manual — CCN 15226509
Sales and Engineering Data — CCN 15227721
ARO Expert and Compact Series Air Operated Diaphragm Pumps
| Air Exhaust | 1-1/2 - 11-1/2 NPT |
| Air Inlet | 3/4 - 14 NPTF - 1 |
| Air Supply Filtration Requirement | 50 microns max (recommended air line filter) |
| Ball Material | PTFE |
| Center Body Material (Air Motor / Air Cap) | Stainless Steel |
| Diaphragm Material | PTFE / Santoprene® |
| Displacement / Cycle @ 100 psig | 1.4 gal (5.3 L) |
| Fluid Cap / Manifold Material | Cast Iron Caps / Stainless Steel Manifold |
| Hardware Material | Carbon Steel |
| Material Inlet / Outlet | 2 - 11-1/2 NPTF - 1 |
| Maximum Air Inlet Pressure | 120 psig (8.3 bar) |
| Maximum Dry Suction Lift | 14 ft (4.2 m) |
| Maximum Flow Rate (Flooded Inlet) | 172 gpm (651 L/min) |
| Maximum Material Inlet Pressure | 10 psig (0.69 bar) |
| Maximum Operating Temperature | 40 ° to 225 ° F (4 ° to 107 ° C) (limited by PTFE diaphragm specs) |
| Maximum Outlet Pressure | 120 psig (8.3 bar) |
| Maximum Particle Size / Max Solids | 1/4" dia. (6.4 mm) |
| Mounting Dimension | 9.062" × 13.250" (230.2 × 336.6 mm) |
| Noise Level @ 70 psig, 60 cpm | 85.0 dB(A) |
| Product Series | Expert Series / Metallic |
| Ratio | 1:1 |
| Seat Material | 316 Stainless Steel |
| Weight | 162.2 lbs (73.6 kgs) [Includes base weight of 133.3 lbs (60.5 kgs) plus 28.9 lbs (13.1 kgs) added for stainless steel air motor section] |
| ACCESSORIES: | |
| FLUID END SERVICE KIT (PTFE) 2" | 637309-TT |
| VALVE SEAT 300 SST 2" EXP | 94353 |
| AIR END SERVICE KIT (EXP/METALLIC) | 637421 |
| ARO 2000 SERIES PIGGYBACK | P39354-600 |
