PEEK Ball Valve Seat | Chemical-Resistant Soft Seat

Overview: High-precision PEEK ball valve seats manufactured by Dalian Allstar Material deliver bidirectional shut-off through elastic preload and pressure-energized self-tightening, significantly outperforming traditional PTFE and metal seats in temperature resistance, cold flow resistance, torque reduction, and bubble-tight sealing.

Core Highlights:

• Working Principle: Achieves reliable bidirectional shut-off by combining an elastic preload (via O-rings, Belleville springs, etc.) with self-tightening under line pressure.

• Material & Precision: CNC-machined from pure or blended PEEK (30% GF, 30% CF, or PTFE) to strict tolerances: roughness Ra ≤ 0.8 µm, roundness ≤ 0.05 mm, and dimensional tolerance ± 0.05 mm.

• Structural Parameters: Available for floating or trunnion configurations, featuring sealing-band widths of 1.0–2.5 mm and a typical face-to-ball contact stress of 0.5–1.2 MPa.

• Versus PTFE: Resists cold flow, withstands a continuous ceiling of 260 °C, and delivers 3–5× the switching life.

• Versus Metal: Achieves bubble-tight (ISO 5208 Rate A) shut-off without lapping and cuts breakaway torque by 40–60%.