ARO 637309-AA Santoprene Diaphragm Pump Repair Kit
Santoprene repair kit (diaphragm and balls) for ARO PD20 pumps with a -B suffix, 16 models listed
Santoprene repair kit for ARO PD20A, PD20R, PD20S and PD20Y pumps with a -B model suffix. Linked to 16 pump models in our parts data.
ARO 637309-AA is a Santoprene repair kit for the PD20 family. Every pump in the sample below ends in -B, and they span PD20A, PD20R, PD20S and PD20Y versions. Diaphragms and balls are both specified as Santoprene.
Related individual parts in our catalog include the ARO 94329-A diaphragm, the ARO 93358-A Santoprene ball and the ARO 94356 O-ring, each with its own listing. The AAA, SAA and LAA blocks in these PD20 codes all call for the same Santoprene wear set. Keeping the old diaphragm until the new one is fitted makes a side-by-side check easy.
When to Use This Kit
- You see liquid in the exhaust or around the air valve.
- The pump runs but cannot hold suction on the inlet line.
- Fluid section O-rings have hardened and started to seep.
Fits These ARO Pumps
- ARO PD20A-AAP-AAA-B
- ARO PD20S-FSS-SAA-B
- ARO PD20A-ASS-LAA-B
- ARO PD20A-BCP-AAA-B
- ARO PD20R-ASS-AAA-B
- ARO PD20A-BAP-AAA-B
- ARO PD20Y-ACS-AAA-B
- ARO PD20A-BSS-AAA-B
Eight more pumps also list it. Check your nameplate model number first.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Santoprene |
| Material - Balls | Santoprene |
