Which pumps does this T32 piston cup fit?

It is listed to fit the JT40, KP-3300PT and T32 pumps.

What is a piston cup and why does it wear?

A piston cup is the flexible seal on the piston that maintains the seal against the cylinder liner bore as the piston reciprocates. Because it works the bore on every stroke, wear here directly affects volumetric efficiency, so it is treated as a consumable.

What part number is this a replacement for?

It is an aftermarket replacement part for Kerr 0856-28-300-00, listed for identification and cross-reference only.

T32 PISTON CUP 3.00 INCH

T32 PISTON CUP 3.00 INCH — Piston Cup aftermarket replacement part

The T32 Piston Cup (3.00 inch) 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, which is why it is a routine wear item. This piston cup fits the JT40, KP-3300PT and T32 pumps and is an aftermarket replacement part for Kerr 0856-28-300-00.

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

JT40
KP-3300PT
T32

Specifications

Property	Value
Weight	0.09 lb (≈ 0.04 kg, converted)
Width	7.7 cm
Height	7.7 cm
Depth	2.1 cm

Manufacturer technical notes

T32 3.00-inch Piston Cup (SKU 0856-28-300-00), molded from HNBR rubber with Kevlar fiber reinforcement via vulcanization (hardness 85 Shore A), metal core made of ASTM A29 42CrMo alloy steel, pressure-resistant ≥7500 PSI, API 7K-compliant mud pump component, tear strength ≥50kN/m, 1200h salt spray corrosion-free.

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing Kerr 0856-28-300-00.

FAQ

Which pumps does this T32 piston cup fit?: It is listed to fit the JT40, KP-3300PT and T32 pumps.
What is a piston cup and why does it wear?: A piston cup is the flexible seal on the piston that maintains the seal against the cylinder liner bore as the piston reciprocates. Because it works the bore on every stroke, wear here directly affects volumetric efficiency, so it is treated as a consumable.
What part number is this a replacement for?: It is an aftermarket replacement part for Kerr 0856-28-300-00, listed for identification and cross-reference only.

Related parts

See all Piston Cup →

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.

Need a quote or part lookup? Contact our team.