The S98 is a high-performance, double flanged butterfly valve designed for industrial pipelines requiring a flanged body and PTFE/RPTFE or metal seated options instead of conventional elastomer liners. It is primarily used for flow isolation in process water, hot fluids, air, gases, and compatible chemical services.
Available bodies: EN-JS1030, ASTM A216 WCB, SS 1.4408, SD 2508.
Discs: SS 1.4408, 1.4470, aluminium bronze, SD 2507.
Shafts: 17-4PH, Duplex F51, Super Duplex F53, C6300.
Seats: PTFE, RPTFE, RPTFE + SS316, metal seated.
The S98 is available as bare shaft or with gearbox. Actuator selection depends on DN, differential closing pressure, seat material, temperature, and required torque.
The page description may indicate “End connection: Wafer,” but the product and technical files refer to double flanged S98. Confirm connection, face-to-face, and flange drilling during procurement.
Is it suitable for throttling?
Only after checking Kv/Cv, ΔP, noise, cavitation, and operating angle.
When to choose metal seated version?
When temperature or media does not allow PTFE/RPTFE seat.
Range: From DN 50 (2”) up to DN 400 (16”) - Larger sizes on request
End connection: Wafer
Flange connection: JIS B 2211-5K and BB 2212-10K - ANSI B 16.5 – Class 150 and 300 - DIN 2501 PN-10 and 16
Temperature range: -50° to +450 °C
Face to face: acc. EN 558-1 - ISO 5752 - API 609 A - BS 5155
Accessories & Compatibility
