Top 7 ways to avoid valve failure in high-temperature steam systems

1. Choose the right body and trim materials. WCB/Alloy steels for bodies; Stellite or hardfacing on seats for throttling; PTFE seats not suited above its rating.
2. Use correct pressure class. Verify ASME B16.34/B16.5 P‑T rating at your design temperature; avoid running near limits.
3. Control thermal cycling. Warm-up procedures, bypass lines and slow opening reduce thermal shock and seat distress.
4. Install and torque correctly. Align flanges, use suitable gaskets, and torque patterns to avoid cocking and leakage.
5. Manage packing leakage. Use graphite packing for steam; retorque after heat‑up; avoid overtightening that increases stem wear.
6. Mitigate water hammer. Non‑slam check valves, slow‑closing actuators and proper drainage trap layout prevent shocks.
7. Inspect and test. Periodic hydro/seat leak testing, PMI, and condition‑based monitoring catch early degradation.

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