What this covers

Core principles that drive accurate valve refacing and reliable sealing:

• Concentricity and runout control - Learn more
• Sealing geometry: face and seat angles, seat width - Learn more
• Chuck/collet systems and clamping consistency
• Surface finish and inspection

Why it matters

Understanding these fundamentals helps you make better setup decisions, correct issues faster, and validate results.

Where to apply these concepts

• Put concepts into practice in Techniques
• If symptoms appear (chatter, taper, burn marks, poor sealing), see Troubleshooting

Equipment context

A stable workhead and precise chuck system improve concentricity control and repeatability during refacing. See how this translates into outcomes: SVSII Deluxe