Discharge Valve Spring for Kerr KA-3500PT/Q5450PT
This is a discharge valve spring for the Kerr KA-3500PT pump. In the fluid end the valve spring returns the discharge valve body to its seat after each stroke, helping the valve close promptly to hold pressure. The part is an aftermarket replacement for Kerr SKU KA-52HD, listed for identification and fit reference rather than as an OEM-made item. It weighs about 0.34 lb.
What it is
A valve spring returns the valve body to its seat after each stroke, ensuring the suction and discharge valves close promptly.
Pump compatibility
Specifications
| Property | Value |
|---|---|
| Weight | 0.34 lb (≈ 0.15 kg, converted) |
| Width | 5.1 cm |
| Height | 5.1 cm |
| Depth | 10.9 cm |
Manufacturer technical notes
HD Valve Spring for Kerr KA-3500PT/Q5450PT (SKU:KA-52HD), cold-forged from ASTM A543 Type B alloy steel, quenched+tempered (HRC 32-38) with Dacromet coating. Tensile strength ≥1100MPa, 720h salt spray corrosion-free, API 7K compliant, 40% extended fatigue life under high-load conditions.
Verbatim from the Dongli product page on dlhddrilling.com.
Replacement / interchange
Aftermarket replacement cross-referencing Kerr KA-52HD.
FAQ
- Which pump does this valve spring fit?
- It is configured for the Kerr KA-3500PT pump. Confirm against your pump model before ordering.
- What does the discharge valve spring do?
- It returns the discharge valve body to its seat after each stroke so the valve closes promptly, which helps the fluid end hold pressure.
- Is there an interchange reference for this part?
- It is an aftermarket replacement for Kerr part number KA-52HD. The number is for cross-reference only and does not imply 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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