Valve Spring
Spring Valve Tapered No.4 Valve
- Catalogue reference number
- SG40001
- Catalogue brand
- Kerr
Catalogue fields identify reference material. They do not confirm stock, OEM authorization or interchange. Verify the nameplate, original number and edition.

Catalogue model references
These are retained catalogue associations, not confirmed fitment for your equipment. Choose the model you want to review.
Catalogue specification records
| Original field | Recorded value |
|---|---|
| Weight | 0.31 lb (≈ 0.14 kg, converted) |
| Width | (无) |
| Height | (无) |
| Depth | (无) |
Catalogue description records
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.
A valve spring returns the valve body to its seat after each stroke, ensuring the suction and discharge valves close promptly.
Catalogue question records
Original catalogue questions are retained. Fitment and availability need technical review.
- 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.
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