DN150 CF8M Wafer Double Eccentric High-Temp Metal Hard Sealed Butterfly Valve

I. Product Overview

II. Key Attribute Parameters

• Size Range: DN50~DN600 (2″~24″), covering small to large-diameter pipelines to Adapt to process loops, heating systems, and high-temperature transmission lines.
• Pressure Rating: Class 150 (20 Bar) and Class 300 (50 Bar), suitable for low to medium-high pressure applications, with full vacuum compatibility.
• Temperature Range: -40℃~400℃, with metal hard sealing maintaining stability across thermal cycles, ideal for high-temperature steam and industrial fluids.
• Material Configuration:
  • Valve Body: Cast carbon steel (WCB), stainless steel (CF8, CF8M) for corrosion resistance, ensuring structural integrity under thermal stress.
  • Seal Surface: Metal hard sealing (alloy-coated) for wear resistance, with optional fire-safe designs to meet high-temperature safety requirements.
  • Stem: Extended design with anti-blowout structure, made of 316 stainless steel for strength and corrosion resistance.
• Connection Type: Wafer or lug type, complying with EN 558 Series 20 and API 609 Table 5 face-to-face dimensions, enabling compact installation between pipeline flanges.
• Operation Modes: Manual (hand lever), worm gear (reducing torque), electric, or pneumatic, with ISO 5211 top flange for standardized actuator mounting.
• Standards Compliance: Design per API 609; flange standards per EN 1092 PN10/16, ANSI Class 150; testing per ISO 5208 Category 3 and API 598.

III. Structural Features

• Double-Eccentric Design: Offset shaft and disc geometry reduce friction between sealing surfaces during operation, lowering torque by 30% compared to concentric valves. This minimizes wear, extending service life in frequent-use systems.
• Metal Hard Sealing: Precision-machined metal sealing surfaces (Ra ≤1.6μm) achieve bubble-tight shut-off, resisting oxidation and deformation at 400℃—outperforming soft seals in high-temperature media like superheated steam.
• Wafer Connection: Compact design eliminates flanges on the valve body, reducing weight by 40% versus flanged valves and saving installation space, ideal for tight-layout pipelines.
• Anti-Blowout Stem: Integral one-piece stem with thrust ring prevents ejection under high pressure, enhancing operational safety in high-temperature and high-pressure systems.
• Extended Stem & Insulation: Extended neck design allows for heat insulation, protecting actuators from high temperatures (over 300℃) and enabling flexible actuator mounting in any direction.