ARO 637373-AA Santoprene Fluid Section Service Kit
Service kit with Santoprene diaphragms and balls for ARO PD20P-FKS-KAA and PD20P-FPS-PAA pumps.
SKU:637373-AA
$317.79
Santoprene diaphragm and ball service kit made for the fluid section of the ARO PD20P-FKS-KAA and PD20P-FPS-PAA diaphragm pumps.
WHERE TO BUY?
The 637373-AA is the Santoprene version of the ARO 637373 service kit family. Its AA code means Santoprene is used for both the diaphragm and the check balls, and the two PD20P pumps it fits carry that same AA code in their model numbers.
Santoprene is a thermoplastic elastomer. In this kit it forms the parts that flex and seal with every stroke: the diaphragm that displaces fluid and the balls that seat to stop backflow. Our listing does not detail every item packed in this variant, so use the operator's manual to confirm what it replaces.
Reasons to Rebuild with 637373-AA
- Liquid is escaping through the exhaust port, pointing to a diaphragm failure.
- Flow pulses unevenly or the pump will not hold prime.
- A scheduled teardown is due and the Santoprene elastomers show cracking or swelling.
Pumps Listed for This Kit
Compare the model on your pump nameplate with these two codes.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Santoprene |
| Material - Balls | Santoprene |
