Piston Cup; 2.75" OD Hemisphere Style Neoprene and Cotton
This is a piston cup with a 2.75 inch outside diameter in a hemisphere style, made of neoprene and cotton. It is the flexible sealing element fitted to the piston in the fluid end of a reciprocating pump, sealing against the cylinder liner bore as the piston reciprocates, which makes it a routine wear part. It is sized for the FMC Bean R660 pump.
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
- R660
Specifications
| Property | Value |
|---|---|
| Outside diameter | 2.75 in |
| Weight | 0.15 lb (≈ 0.07 kg, converted) |
| Width | 3.00 in / 7.6 cm |
| Height | 3.00 in / 7.6 cm |
| Depth | 1.00 in / 2.5 cm |
Manufacturer technical notes
Piston Cup (2.75" OD Hemispherical), neoprene-cotton composite with vulcanization process, operating temperature -30℃~120℃, API 7K compatible for mud pumps, 40% improved tear resistance, working pressure ≤5000psi.
Verbatim from the Dongli product page on dlhddrilling.com.
Replacement / interchange
Aftermarket replacement cross-referencing FMC Bean A268N.
FAQ
- Which pump does this piston cup fit?
- It is listed to fit the FMC Bean R660 pump.
- What size is this piston cup?
- It has a 2.75 inch outside diameter and is a hemisphere style cup. As the flexible sealing element on the piston, it seals against the cylinder liner bore as the piston reciprocates.
- Is there an interchange part number?
- This is an aftermarket replacement for FMC Bean SKU A268N. 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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