ARO 637375-SA 1-1/2" Fluid Section Kit, Santoprene/316 SS

Built for 1-1/2" ARO diaphragm pump fluid sections, the 637375-SA kit combines Santoprene diaphragms with 316 stainless steel balls. The product notes list a grease package, a gasket, a U-cup and an O-ring alongside the ball and diaphragm components.

Because the kit carries the soft goods and the check balls together, one order covers a full fluid-side refresh. The specs name the 316 grade for the balls, which helps when a process sheet calls for a specific stainless alloy. A technical data sheet is available for the kit.

When to Rebuild With This Kit

• The pump moves less fluid at the same air setting.
• Fluid appears at the muffler.
• Check balls fail to seat, letting fluid flow backward.
• A scheduled teardown is coming up and you want every fluid-side seal replaced at once.

Fits These ARO Pumps

Four PD15A models and one PD15S model are listed:

• ARO PD15A-AAS-SSA
• ARO PD15A-AAP-ASA
• ARO PD15A-AAP-HSA
• ARO PD15A-ASP-SSA
• ARO PD15S-YSS-SSA

All five use the A suffix in the last block of the model code, matching the kit.