What does the piston body do?

As a pump piston it transmits force from the power end to the pumped fluid inside the cylinder liner, carrying the sealing element and reciprocating within the liner bore on each stroke.

What Kerr part number does it cross-reference?

It is an aftermarket replacement for Kerr part number KP-250-300-DW2; the brand and number are listed for identification only.

Kerr KP-250-300-DW2 Piston Body

Kerr KP-250-300-DW2 Piston Body — Piston aftermarket replacement part

The Kerr KP-250-300-DW2 Piston Body is the pump piston that transmits force from the power end to the pumped fluid inside the cylinder liner, reciprocating within the liner bore on every stroke. It fits the Kerr JT40 and KP-250 pumps and is supplied as an aftermarket replacement for Kerr part number KP-250-300-DW2. It measures about 7.4 cm by 7.4 cm by 3.1 cm and weighs about 1.39 lb.

What it is

A pump piston transmits force from the power end to the pumped fluid inside the cylinder liner. It carries the sealing element and reciprocates within the liner bore on every stroke.

Pump compatibility

JT40
KP-250

Specifications

Property	Value
Weight	1.39 lb (≈ 0.63 kg, converted)
Width	7.4 cm
Height	7.4 cm
Depth	3.1 cm

Manufacturer technical notes

Kerr KP-250-300-DW2 Piston Body (SKU: KP-250-300-DW2) API 7K-certified 45# steel/40Cr alloy forging (tensile strength ≥900MPa) with quenching+tempering treatment (hardness HRC32-36), phosphated anti-corrosion coating (salt spray tested >1000h). Compatible with Kerr triplex mud pumps, dynamic sealing leakage ≤0.02mL/min, compliant with ISO 9001 standards.

Verbatim from the Dongli product page on dlhddrilling.com.

Replacement / interchange

Aftermarket replacement cross-referencing Kerr KP-250-300-DW2.

FAQ

Which pumps does this piston body fit?: It fits the Kerr JT40 and KP-250 pumps.
What does the piston body do?: As a pump piston it transmits force from the power end to the pumped fluid inside the cylinder liner, carrying the sealing element and reciprocating within the liner bore on each stroke.
What Kerr part number does it cross-reference?: It is an aftermarket replacement for Kerr part number KP-250-300-DW2; the brand and number are listed for identification only.

Related parts

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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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