ARO 637303-TA 3" Fluid Section Kit, Santoprene/PTFE

The 637303-TA kit is sized for the fluid section of 3" ARO diaphragm pumps. Here the diaphragms are Santoprene and the balls are Teflon/PTFE, pairing a flexible elastomer with a rigid fluoropolymer.

Besides those two wear items, the product notes list a cushion, an O-ring, a U-cup, a gasket and a grease package. Having the small seals on hand with the diaphragms saves a second order mid-rebuild. Specs and dimensions are in the technical data sheet that accompanies this kit.

Signs Your 3" Pump Is Due

• Outlet flow is down while the stroke rate climbs to compensate.
• Exhaust air carries traces of the pumped product, pointing to a diaphragm failure.
• The pump loses prime between batches.
• A diaphragm shows cracks or stiffness at the clamp edge during inspection.

PD30A Pumps Listed for This Kit

Each listed model carries the -C suffix and a TA material code:

• ARO PD30A-AAP-ATA-C
• ARO PD30A-AAP-STA-C
• ARO PD30A-ASS-STA-C
• ARO PD30A-AAS-STA-C
• ARO PD30A-FSP-ATA-C