Piston Cup 2-3/4 Inch Abrasive Service XNBR
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.
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
- BEAN 435
- W1122BCD
Specifications
| Property | 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 |
Replacement / interchange
Aftermarket replacement cross-referencing FMC Bean 5260221 (Temporarily Out of Stock).
FAQ
- 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.
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.
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