Piston Cup Kit 4.00 Inch
The Piston Cup Kit 4.00 Inch supplies the flexible piston cup sealing element for the fluid end of reciprocating pumps. Fitted to the piston, the cup maintains the seal against the cylinder liner bore as the piston reciprocates, making it a routine wear part that affects volumetric efficiency. This 4.00 inch kit fits the Kerr KT-3400PT pump and is an aftermarket replacement cross-referenced to Kerr part KA-260-400.
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
Specifications
| Property | Value |
|---|---|
| Weight | 0.86 lb (≈ 0.39 kg, converted) |
| Width | 10.4 cm |
| Height | 10.4 cm |
| Depth | 3.8 cm |
Replacement / interchange
Aftermarket replacement cross-referencing Kerr KA-260-400.
FAQ
- Which pump does this 4.00 inch cup kit fit?
- It fits the Kerr KT-3400PT pump.
- What is the cross-reference part number?
- This is an aftermarket replacement cross-referenced to Kerr part KA-260-400. The brand and part number are used for identification and comparison only and do not imply OEM manufacture.
- What does the piston cup do?
- The piston cup is the flexible sealing element on the piston in the fluid end. It seals against the cylinder liner bore as the piston reciprocates, so wear here directly affects volumetric efficiency.
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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