
ARO 637427-AA Santoprene Diaphragm Pump Repair Kit
Repair kit with Santoprene diaphragm and Santoprene balls, listed for 41 ARO PD05P pump models
ARO 637427-AA repair kit uses Santoprene for both the diaphragm and the check balls, and it is listed for 41 ARO PD05P diaphragm pumps.
The ARO 637427-AA is a fluid-section repair kit for ARO (Ingersoll Rand) PD05P double diaphragm pumps. The diaphragm and the balls are both specified in Santoprene. Its fit list covers PD05P pumps with many different model codes, from PD05P-AAS-FAA to PD05P-BPS-PAA-B.
The diaphragm flexes back and forth to draw fluid in and push it out, while the balls seat and unseat to act as check valves. Both wear over time, and replacing them together brings back suction and output. A technical data document is listed for this kit.
Time to Rebuild? Watch for These Signs
- Fluid shows up in the air exhaust, a common sign of a split diaphragm.
- The pump runs but flow drops or it struggles to prime.
- Balls are pitted, swollen or no longer seal against their seats.
ARO PD05P Pumps That Use 637427-AA
- ARO PD05P-BPS-PAA-B
- ARO PD05P-ARS-SAA-B
- ARO PD05P-APS-PAA-B
- ARO PD05P-AES-SAA-B
- ARO PD05P-AES-DAA-B
- ARO PD05P-ASS-SAA
- ARO PD05P-ARS-PAA-B
- ARO PD05P-AAS-FAA
33 more PD05P configurations are also on the fit list.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Santoprene |
| Material - Balls | Santoprene |
