Key Specifications / Parameters Part Number: 11A9727X012 (alternate suffixes exist for higher service temperatures: 11A9727X022, 11A9727X032) Product Type: Piston ring, graphite (part of the trim internal components) Application: Used in NPS 8 × 6 valve bodies of the EWN/EW‑1 series (sliding stem with cage‑guiding), especially for steam or non‑oxidizing service up to ~600 °F (316 °C) for the “X012” suffix version. Service Temperature Limit (for X012 version): Up to ~316 °C (600 °F) in steam or non‑oxidizing service. Material: Graphite ring construction (serving as a low‑friction wear surface) Legacy / Trim Use: Found in the parts list as “piston ring, graphite” for certain cage levels of the EWN/EW‑1 valve family.
