Piston Cup
Piston Cup 2-3/4 Inch Abrasive Service XNBR
- Catalogue reference number
- 5260221
- Catalogue brand
- FMC Bean
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 | 0.12 lb (≈ 0.05 kg, converted) |
| Width | 2.75 in / 7 cm |
| Height | 2.75 in / 7 cm |
| Depth | 1.50 in / 3.8 cm |
Catalogue description records
This is a 2-3/4 inch XNBR piston cup for abrasive service, the flexible sealing element fitted to the piston in the fluid end of a reciprocating pump. It seals against the cylinder liner bore as the piston reciprocates and is a routine wear part. It is sized for FMC Bean 435 and W1122BCD pumps, and the "abrasive service" designation in the name indicates it is intended for pumping abrasive fluids.
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 FMC Bean 435 and W1122BCD pumps.
- What does this piston cup do?
- A piston cup is the flexible sealing element on 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. This cup is named for abrasive service.
- Is there an interchange part number?
- This is an aftermarket replacement for FMC Bean SKU 5260221. The brand and part number are given for identification and cross-reference only and do not indicate OEM manufacture.
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