Valve spring 3643725 is the third-generation reinforced heavy-duty spring for the full Cummins KTA19, QSK19, KTA38, QSK38, KTA50 and QSK50 range, cross-referencing 205208, 3629006, 3629007, 3630628 and 3633840. It is wound from vanadium-niobium microalloyed 55SiCrA steel and weighs 0.18–0.20 kg. It is rated for 24-hour continuous running at 1200–2100 rpm.
Specifications
| Part No. |
3643725 |
| Product Name |
Valve Spring |
| Cross Reference PN |
205208, 3629006, 3629007, 3630628, 3633840 |
| Fit Engines |
Full series KTA19/QSK19, KTA38/QSK38, KTA50/QSK50 |
| Base Material |
Vanadium-Niobium microalloyed 55SiCrA steel |
| Single Net Weight |
0.18–0.20 kg |
| Continuous Rated Speed |
1200–2100 RPM for 24-hour nonstop operation |
| Product Grade |
3rd-gen reinforced heavy-duty long service version |
| Severe Working Environments |
Dust-heavy mining sites, marine salt fog, high-temp oilfields, full-load continuous generator sets |
Key Features
- Third-generation reinforced heavy-duty long service version
- Vanadium-niobium microalloyed 55SiCrA spring steel
- 0.18–0.20 kg per spring
- Rated for 24-hour continuous running at 1200–2100 rpm
- Cross-references 205208, 3629006, 3629007, 3630628 and 3633840
Typical Applications
- Dust-heavy mining sites
- Marine installations exposed to salt fog
- High-temperature oilfield equipment
- Full-load continuous generator sets
Ordering from Sino Bus Parts
- Wholesale pricing; bulk orders welcome
- Global shipping
- Fitment confirmed against your engine serial or CPL before dispatch
- Contact us on WhatsApp for a quotation
