Piston Cup 2 1/4" RD / Retainer
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.
What it is
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.
Pump compatibility
- KM-3250PT
- KMX-3300SHPT
- T30M
Specifications
| Property | Value |
|---|---|
| Weight | 0.06 lb (≈ 0.03 kg, converted) |
| Width | （无） |
| Height | （无） |
| Depth | （无） |
Manufacturer technical notes
2 1/4" Piston Cup for Kerr KM-260-225RD (SKU:KM-260-225RD), Resilon® polyurethane with metal core, vulcanized一体成型（ASTM D2000-22）, salt spray tested ≥1200hrs corrosion-free, API 7K compliant, dynamic sealing pressure ≥30MPa, compatible with FMC/Emsco high-pressure pumps.
Verbatim from the Dongli product page on dlhddrilling.com.
Replacement / interchange
Aftermarket replacement cross-referencing Kerr KM-260-225RD.
FAQ
- 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.
Related parts
All brand names, model numbers and part numbers are used for identification and cross-reference only and do not imply original-equipment manufacture. This is an aftermarket replacement part.
Need a quote or part lookup? Contact our team.