Piston Cup
Piston Cup 2 1/4" RD / Retainer
- Catalogue reference number
- KM-260-225RD
- Catalogue brand
- Kerr
Catalogue fields identify reference material. They do not confirm stock, OEM authorization or interchange. Verify the nameplate, original number and edition.
Catalogue model references
These are retained catalogue associations, not confirmed fitment for your equipment. Choose the model you want to review.
Catalogue specification records
| Original field | Recorded value |
|---|---|
| Weight | 0.06 lb (≈ 0.03 kg, converted) |
| Width | （无） |
| Height | （无） |
| Depth | （无） |
Catalogue description records
This is a 2-1/4 inch piston cup (RD / Retainer style), the flexible sealing element fitted to the piston in the fluid end of a reciprocating pump. As the piston reciprocates it maintains the seal against the cylinder liner bore, making it a routine wear part. It is sized for Kerr KM-3250PT, KMX-3300SHPT and T30M pumps.
A piston cup is the flexible sealing element fitted to the piston in the fluid end. It maintains the seal against the cylinder liner bore as the piston reciprocates, so wear here directly affects volumetric efficiency.
Catalogue question records
Original catalogue questions are retained. Fitment and availability need technical review.
- Which pumps does this piston cup fit?
- It is listed to fit Kerr KM-3250PT, KMX-3300SHPT and T30M pumps.
- What does a piston cup do?
- A piston cup is the flexible sealing element fitted to the piston in the fluid end. It maintains the seal against the cylinder liner bore as the piston reciprocates, so wear here directly affects the pump's volumetric efficiency.
- Is there an interchange part number?
- This is an aftermarket replacement for Kerr SKU KM-260-225RD. The brand and part number are given for identification and cross-reference only and do not indicate OEM manufacture.
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