ARO PD20A-AAP-AAA-B 2 In. EXP Double Diaphragm Pump
2 in. EXP Series diaphragm pump moving up to 172 gpm, all-Santoprene diaphragms, balls and seats
Rated for 172 gpm, this 2 in. EXP Series air-operated pump uses Santoprene for its diaphragms, check balls and valve seats throughout.
For large-volume transfer, the ARO PD20A-AAP-AAA-B offers 2 in. NPTF connections in an EXP Series air-operated double diaphragm design. The flexing and sealing parts are all Santoprene: diaphragms, check balls and seats. Plated steel hardware holds the pump together.
It is rated at 172 gpm (651.1 lpm), the highest flow in this group of EXP models. Air supply and fluid discharge pressure are each limited to 120 psi (8.3 bar). The valves clear solids up to 1/4 in., and the noise rating is 85.0 dB(A).
Its parts list carries two air section kits, 637369 and 637421, along with the 637309-AA repair kit for the diaphragm side. A continuous-duty muffler is listed to quiet the air exhaust, and a cycle counter kit can track strokes between services.
Key Specifications
- Connections: 2 in. NPTF
- Flow rating: 172 gpm (651.1 lpm)
- Maximum pressure: 120 psi (8.3 bar), air and fluid
- Elastomer: Santoprene diaphragms, balls and seats
- Solids pass-through: 1/4 in.
- Sound: 85.0 dB(A), so plan hearing protection nearby
Typical Applications
- Tanker and tote unloading at high flow
- Main transfer lines with 2 in. piping
- Fluids with suspended solids no larger than 1/4 in.
Service Parts for This Pump
Rebuild and accessory items for this 2 in. model:
- ARO 637309-AA fluid section repair kit, AA
- ARO 637421 air section kit for 2 and 3 in. EXP pumps
- ARO 637369 air section service kit
- ARO 67174-20 screen inlet kit
- ARO 67263 continuous-duty muffler
- ARO Y325-202 O-ring, black
Ten parts and kits make up the full list for the PD20A-AAP-AAA-B.
| Brand | ARO |
|---|---|
| Product Type | Pump |
| Product Series | EXP Series |
| Material - Diaphragm | Santoprene |
| Application | Air Operated Pump |
| Inlet/Outlet Connection Type | NPTF |
| Outlet Size | 2 in |
| Solids Handling | 1/4 in |
| Material - Balls | Santoprene |
| Material - Seats | Santoprene |
| Max Air Inlet Pressure | 120 psi (8.3 bar) |
| Max Flow | 172 gpm (651.1 lpm) |
| Max Fluid Pressure | 120 psi (8.3 bar) |
| Max Temperature | 350°F (176.7°C) |
| Noise Level | 85.0 dB(A) |
| Material - Hardware | Plated Steel |
| Displacement | Positive Displacement |
