PD20A-AAP-STT-B ARO 2" NPTF EXP METALLIC PUMP/ALUMINUM CENTER/ALUMINUM WETTED/PLATED STEEL HARDWARE/STAINLESS STEEL SEATS/PTFE BALLS/PTFE DIAPHRAGMS

PD20A-AAP-STT-B ARO 2" Aluminum Metallic Expert Series Air Operated Double Diaphragm Pump

ARO
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PD20A-AAP-STT-B
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Description

P/N PD20A-AAP-STT-B ARO 2" Aluminum Metallic Expert Series Air Operated Double Diaphragm Pump

The ARO PD20A-AAP-STT-B is a 2-inch Metallic Expert Series air-operated double-diaphragm pump engineered for high-volume, dependable fluid handling in demanding industrial and chemical processing applications. Featuring an all-aluminum casing paired with carbon steel hardware, 316 stainless steel valve seats, PTFE valve balls, and PTFE / Santoprene® diaphragms, it provides broad chemical compatibility and long service life.

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, making it well suited for industrial fluid transfer, chemical circulation, filling, batching, and handling aggressive or corrosive fluids with small, suspended solids.

Application suitability should be confirmed based on fluid chemical compatibility, operating temperature, viscosity, and process conditions. Note: Aluminum-wetted models are not suitable for use with halogenated hydrocarbon solvents or food products intended for human consumption.

Operator's Manual - CCN 15226509

Sales and Engineering Data - CCN 15227721

ARO Expert and Compact Series Air Operated Diaphragm Pump

Air Exhaust 1-1/2 - 11-1/2 NPTF
Air Inlet 3/4 - 14 NPTF - 1
Ball Material PTFE
Center Body Material (Air Motor / Air Cap)  Aluminum
Diaphragm Material PTFE / Santoprene®
Displacement / Cycle @ 100 psig 1.4 gal (5.3 L)
Fluid Cap / Manifold Material Aluminum
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 °–225 °F (4 °–107 °C) (limited by PTFE 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 91.5 lbs (41.5 kgs)
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