Spring Valve Tapered No.4 Valve
This is a tapered valve spring for the No. 4 valve in the Kerr T-50 pump. As a valve spring it returns the valve body to its seat after each stroke, helping the suction and discharge valves close promptly in the fluid end. It weighs about 0.31 lb and is offered as an aftermarket replacement part that interchanges with Kerr part number SG40001.
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
- T-50
Specifications
| Property | Value |
|---|---|
| Weight | 0.31 lb (≈ 0.14 kg, converted) |
| Width | （无） |
| Height | （无） |
| Depth | （无） |
Manufacturer technical notes
Spring Valve Tapered No.4 Valve (SKU:SG40001) API 7K-certified ASTM A216 WCB carbon steel (quenched & tempered process), nitrided surface (hardness ≥65HRC, salt spray tested >1500hrs corrosion-free) for API 6A/16C mud pump high-pressure applications. Fatigue strength increased by 40% (GB/T 12349-2021 compliant), dynamic sealing leakage ≤0.02mL/min.
Verbatim from the Dongli product page on dlhddrilling.com.
Replacement / interchange
Aftermarket replacement cross-referencing Kerr SG40001.
FAQ
- Which pump does this valve spring fit?
- It fits the Kerr T-50 pump, specifically the No. 4 valve.
- What does a valve spring do?
- It returns the valve body to its seat after each stroke, ensuring the suction and discharge valves close promptly.
- Is this an original Kerr part?
- No. It is an aftermarket replacement that interchanges with Kerr part number SG40001; the brand and number are listed for identification only and do not indicate original-equipment 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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