ARO 637401-SA EXP Service Kit, Santoprene and 316 Stainless
Fluid section service kit with a Santoprene diaphragm and 316 stainless steel balls for PD10 pumps
ARO 637401-SA pairs a Santoprene diaphragm with 316 stainless steel balls. It services three PD10 double diaphragm pump models.
The ARO 637401-SA is an EXP service kit for the wetted side of a double diaphragm pump. Its diaphragm is molded from Santoprene, and its check balls are 316 stainless steel. The diaphragm flexes back and forth to move fluid, while the balls lift and reseat to keep flow going one way.
This variant fits buyers who want the stainless ball option on a PD10 pump built with Santoprene diaphragms. Our kit record does not spell out every piece in the bag, so check the service manual for your pump to see exactly what gets replaced.
When to Use This Kit
- Output has fallen even though air supply pressure has not changed.
- Fluid or residue shows up at the air exhaust, a common sign of a split diaphragm.
- The pump loses prime or struggles to lift fluid on the suction side.
Fits These ARO Pumps
Our parts data matches 637401-SA to these three models:
Compare the model number stamped on your pump nameplate with this list before ordering.
| Brand | ARO |
|---|---|
| Product Type | Kit |
| Material - Diaphragm | Santoprene |
| Material - Balls | 316 Stainless Steel |
