In the high-wear pipelines of oil & gas transmission, high-temperature flue gas circuits of refineries, and abrasive slurry systems of mining, conventional soft-seated valves often fail due to seal degradation and short service life. The Ouwei Metal-to-Metal Seated Butterfly Valve redefines reliability for extreme conditions, leveraging a rigid metal sealing pair to deliver unmatched durability and zero-leakage performance—becoming the gold standard for fluid control in heavy-duty industrial scenarios.
Its core strength lies in the integrated metal sealing system, engineered to eliminate the weaknesses of soft-seated alternatives:
• Hardfaced sealing pair: Valve disc and seat are hardfaced with Stellite alloy or tungsten carbide (HV ≥ 850), forming a wear-resistant, corrosion-resistant interface that resists erosion from particles, high-temperature media, and corrosive fluids. This design achieves API 609 Level 4 shutoff capability, meeting ISO 5208 Class A zero-leakage even under thermal cycling.
• Bidirectional self-sealing structure: The metal seat’s elastic preload and the disc’s precise centering ensure uniform sealing pressure distribution. Under PN16–PN160 pressure and -29°C to 600°C temperature, the seal tightens as pressure rises, avoiding cold flow or creep common in soft seals.
• Zero friction opening/closing: The disc lifts slightly from the seat at the start of rotation, reducing operating torque by 40% and minimizing abrasive wear—extending the valve’s cycle life to over 150,000 operations.
Material and craftsmanship upgrades further reinforce its robustness:
• Valve body uses duplex stainless steel (S31803/S32205) or alloy steel (A105/SA182 F91), with a shot-peened surface and passivation treatment to enhance corrosion resistance by 40% vs. standard carbon steel.
• Anti-scour trim design: The disc’s streamlined profile and the seat’s labyrinth structure reduce media impact by 60%, preventing cavitation and erosion in high-velocity pipelines.
• Integral stem and disc: One-piece forging eliminates leakage paths at the stem–disc junction, while metal bellows seals or packing with graphite inserts control stem leakage to ≤10ppm, complying with ISO 15848-1 fugitive emission standards.
From crude oil gathering pipelines and catalytic cracking regenerator flue gas systems to coal-fired power plant desulfurization circuits and mineral processing slurry transport, the Ouwei Metal-to-Metal Seated Butterfly Valve excels across industries. It covers DN80–DN2800 diameters, with actuation options including pneumatic rack-and-pinion, electric multi-turn, and hydraulic for quick response (0.3s emergency shutdown). Its modular design cuts seal replacement time to 1.5 hours, slashing maintenance costs by 35% over the lifecycle.
Certified by API 6D, ISO 9001, and CE, the valve integrates with smart industrial platforms via Modbus TCP/IP for remote monitoring and predictive maintenance. Its low-torque operation pairs with energy-saving actuators to save up to 150kWh/unit annually, aligning with low-carbon industrial trends.
In scenarios where soft seals fail, the Ouwei Metal-to-Metal Seated Butterfly Valve stands as a reliable barrier. Its metal-hardened sealing, robust materials, and precision engineering ensure uninterrupted operation in high temperature, high pressure, and abrasive media. Choosing Ouwei means choosing long-term stability, reduced downtime, and total cost of ownership optimization—securing the lifeline of critical industrial processes.
#ButterflyValve #Valve #ouweivalve #MetaltoMetalSeatedButterflyValve