ARO PD03P-ARS-PAA 3/8 in. Non-Metallic Diaphragm Pump

The ARO PD03P-ARS-PAA is a 3/8 in. air-operated double diaphragm pump in ARO's Compact Series. It is a non-metallic design built around a polypropylene center body with stainless steel fasteners, and ARO rates this 3/8 in. size for flows up to 10.6 gpm (40.1 lpm). Like other AODD pumps, it uses air pressure to alternate suction and discharge between two fluid chambers, with flat checks keeping the flow moving in one direction.

Cycling begins as soon as air is applied, and the pump keeps pace with demand. With the discharge closed, it stops at maximum line pressure and picks up again once the line opens. A Simul-Shift valve supplies the shift signal, and ARO's patented unbalanced air valve is designed for no-stall operation. ARO offers this series in center, end, and dual inlet/outlet manifold layouts.

Key Specifications

• Size: 3/8 in.
• Construction: non-metallic, with a polypropylene center body
• Fasteners: stainless steel
• Maximum flow: 10.6 gpm (40.1 lpm)
• Check type: flat checks
• Series: ARO Compact Series

Typical Applications

• Transfer of corrosive chemicals where a non-metallic pump body is preferred
• Built-in pumping on OEM equipment where space is tight
• Small-batch transfer and dispensing that needs flow on demand
• Drawing fluid from drums or totes, using the pump's self-priming ability

Service Parts for This Pump

Our catalog does not yet link a parts list to this model. The documents for this pump include an operation manual, a general information manual, and a chemical resistance guide. Use the manual to find the part numbers for diaphragms, balls, and seats, and use the guide to check fluid compatibility before choosing materials.