Dayton 22A611 Pump Repair Kit Santoprene 12 pieces

Fluid End Repair Kit

This Dayton 22A611 kit supplies the internal components needed to service an air-operated double diaphragm pump. It contains twelve Santoprene pieces including four check balls, two diaphragms and six O-rings. The kit matches Grainger part numbers 22A597 and 3HJW7 as well as the manufacturer model 22A597. Maintenance teams can restore sealing performance without replacing the whole pump.

Santoprene Material Limits

Santoprene handles many water-based and mild chemical fluids but is not suited for strong solvents, concentrated acids or high-temperature media. The ball-type valve design relies on the elastomer's flexibility to seal against the seat, so aggressive chemicals that cause swelling or hardening will degrade performance. California Proposition 65 notices indicate the presence of substances linked to cancer and reproductive harm, so appropriate handling precautions are required.

Twelve-Piece Capacity and Coverage

The twelve components address the primary wear points of the fluid end: four check balls, two diaphragms and six O-rings. This quantity covers a standard rebuild for compatible one-half inch pump models, restoring flow integrity and preventing bypass leaks. Pumps with additional sealing surfaces or larger fluid ends will need supplementary parts beyond this kit.