A precision coil spring that controls valve movement in internal combustion engines.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Spring OD | 20-40 mm | |
| Coil Count | 4-8 active coils | |
| Free Length | 40-80 mm | |
| Spring Rate | 30-80 N/mm | |
| Maximum Load | 400-900 N | |
| Wire Diameter | 2.0-5.0 mm | |
| Installed Load | 200-500 N | |
| Installed Height | 30-60 mm | |
| Operating Temperature | -40°C to 200°C |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
Flow control devices in compressors that regulate the intake and discharge of gases or fluids.
A system of valves that controls the flow, pressure, and direction of gases or fluids within a pressure compressor.
The top cover of an engine cylinder that seals the combustion chamber and houses valves, spark plugs, and fuel injectors.
A practical evidence checklist for RFQ preparation and supplier evaluation.
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3 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.
Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.
Common causes include fatigue from cyclic loading, overheating leading to tempering loss, corrosion from engine fluids, improper installation causing over-compression, and material defects. High RPM operation accelerates fatigue failure.
In standard automotive applications, valve springs typically last 150,000-200,000 km. High-performance engines may require replacement every 50,000 km or after significant modifications. Always follow manufacturer specifications and inspect during major engine service.
Spring pressure can be tested in-place using specialized spring testers that measure installed load. However, comprehensive testing for fatigue cracks or dimensional changes usually requires removal and visual/magnetic particle inspection.
Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.