Piston Cup 1-5/8 Inch Nitrile
This is a 1-5/8 inch nitrile piston cup, the flexible sealing element that fits onto the piston in the fluid end of a reciprocating pump. As the piston reciprocates it maintains the seal against the cylinder liner bore, so this is a routine wear part. It is sized for FMC Bean R10 and R2020 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
- R10
- R2020
Specifications
| Property | Value |
|---|---|
| Weight | 0.03 lb (≈ 0.01 kg, converted) |
| Width | 1.75 in |
| Height | 1.75 in |
| Depth | 1.00 in |
Manufacturer technical notes
1-5/8" Nitrile Piston Cup (SKU:1251925) for 1.625" ID Cylinder, molded from NBR rubber with Shore hardness 75A±3 via compression vulcanization. Temperature resistance -40°C to 120°C, tensile strength ≥12MPa. Recommends 5257218 packing washer, API 7K compliant for FMC BEAN power ends.
Verbatim from the Dongli product page on dlhddrilling.com.
Replacement / interchange
Aftermarket replacement cross-referencing FMC Bean 1251925.
FAQ
- Which pumps does this piston cup fit?
- It is listed to fit FMC Bean R10 and R2020 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 FMC Bean SKU 1251925. 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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