Triple Eccentric Hard-Seal Butterfly Valve

Triple Eccentric Hard-Seal Butterfly Valve

The triple eccentric hard-seal butterfly valve is engineered for demanding industrial applications where reliable shutoff, high pressure resistance, and extended service life are non-negotiable. Designed to eliminate common pain points such as seat wear, leakage, and operational inefficiency, this valve delivers precision performance across a wide range of temperatures and media types. It is the ideal solution for engineers, procurement managers, and project leaders seeking a robust, cost-effective alternative to gate and globe valves in high-performance piping systems.

Parameter	Details
Product Name	Triple Eccentric Hard-Seal Butterfly Valve
Model/Series	TE-HSB Series
Size Range	DN50 (2″) – DN2000 (80″)
Pressure Rating	Class 150 – Class 2500; PN10 – PN100
Connection Type	Flanged (RF, RTJ, BW), Wafer, Lug
Design Standard	API 609, ASME B16.34, EN 593, GB/T 12238
Body Material	WCB, LCB, WC6, WC9, CF8, CF8M, CF3, CF3M, Duplex Stainless Steel
Disc/Stem Material	304, 316, 410, 17-4PH, Inconel, Hastelloy
Seat Material	Stainless Steel + Graphite, Inconel + PTFE, Stellite Alloy, Metal-to-Metal
Operation Method	Manual (Worm Gear, Lever), Pneumatic, Electric, Hydraulic Actuation
Special Design	Triple Eccentric Structure, Zero-Leakage Sealing, Fire-Safe Design
Operating Temperature	-196°C to 816°C (-320°F to 1500°F)
Suitable Media	Oil, Gas, Steam, Chemicals, Water, Slurries, High-Temperature Fluids

Core Advantages: Solving Your Critical Operational Pain Points
1. Zero Leakage & Extended Service Life
The triple eccentric design eliminates radial friction between the disc and seat during operation, preventing the abrasive wear that plagues conventional butterfly valves. This results in a true metal-to-metal or composite seal that maintains bubble-tight shutoff even after tens of thousands of cycles, drastically reducing maintenance costs and unplanned downtime.
2. High Pressure & Temperature Resistance
Engineered to meet ASME B16.34 and API 609 standards, our hard-seal butterfly valve handles extreme pressures up to Class 2500 and temperatures ranging from cryogenic (-196°C) to superheated steam (816°C). This makes it suitable for applications where soft-seat valves would fail due to thermal degradation or pressure spikes.
3. Low Operating Torque & Energy Efficiency
The offset disc geometry minimizes contact area with the seat, significantly reducing operating torque compared to single or double eccentric valves. This allows for smaller, more cost-effective actuators and lower energy consumption, especially in automated systems.
4. Fire-Safe & Fugitive Emission Compliance
Our valves are built with fire-safe construction per API 607, ensuring secondary sealing in the event of a fire and preventing catastrophic failure. They also meet strict fugitive emission standards, making them ideal for environmentally sensitive industries such as oil and gas and chemical processing.

Technical Details: Precision Engineering for Reliability
Material Science for Durability
• Body: Forged or cast carbon/stainless steel options provide exceptional mechanical strength and corrosion resistance.
• Disc & Stem: High-grade alloys (including Inconel and Stellite) resist erosion, cavitation, and corrosion, ensuring structural integrity in aggressive media.
• Seat: A layered composite or metal-to-metal design delivers sealing performance without sacrificing wear resistance, adapting to thermal expansion and contraction in extreme conditions.
Triple Eccentric Design Breakdown
The three distinct offsets (shaft eccentricity, disc eccentricity, and seat cone eccentricity) work in harmony to:
• Eliminate rubbing between the disc and seat during opening/closing.
• Create a camming action that ensures full contact only at the final closed position.
• Enable bi-directional sealing without differential pressure reliance.

Application Scenarios: Proven Performance Across Industries
Our triple eccentric hard-seal butterfly valve is deployed in mission-critical systems across the following sectors:
• Oil & Gas: Pipeline transmission, refinery processing, and offshore platforms handling crude oil, natural gas, and refined products.
• Power Generation: Boiler feedwater, steam lines, and exhaust systems in coal, gas, and nuclear power plants.
• Chemical & Petrochemical: Corrosive chemical processing, solvent recovery, and high-temperature reaction systems.
• Water & Wastewater: Raw water intake, sludge handling, and high-pressure distribution networks.
• Mining & Minerals: Slurry transport, ore processing, and tailings management systems.
• Marine & Offshore: Shipboard piping, desalination plants, and subsea pipeline isolation.

Maintenance Convenience: Minimizing Downtime
• Easy Access: The top-entry design allows for in-line maintenance of the seat, disc, and stem without removing the valve from the pipeline.
• Replaceable Components: Seats and seals are modular, enabling quick replacement without specialized tools or extended shutdowns.
• Long Service Intervals: The frictionless operation and robust materials mean inspection and maintenance cycles can be extended to match plant turnaround schedules.

Procurement Guidance & Trust Assurance
When selecting a triple eccentric hard-seal butterfly valve, prioritize:
1. Material Compatibility: Match body, disc, and seat materials to your specific media and temperature conditions to avoid premature failure.
2. Actuation Sizing: Work with our engineering team to select the optimal actuator size based on your operating torque requirements.
3. Compliance: Ensure the valve meets industry-specific standards (API, ASME, EN) for your application, especially in regulated sectors like oil and gas.
Our valves are manufactured under strict ISO 9001 quality control, with full material traceability and third-party inspection (API, TÜV, DNV) available upon request. Backed by a global service network, we provide technical support from initial design through installation and ongoing maintenance, ensuring your investment delivers reliable performance for decades.