Thermal Triple Offset Butterfly Valve For High-temp Applications
The thermal triple offset butterfly valve ensures zero-leakage performance in high-temperature environments up to 815°c, ideal for steam, gas, and thermal oil systems in power generation and petrochemical applications.
Thermal Triple Offset Butterfly Valve For High-temp Applications
The thermal triple offset butterfly valve ensures zero-leakage performance in high-temperature environments up to 815°c, ideal for steam, gas, and thermal oil systems in power generation and petrochemical applications.
Engineered for high-temperature and critical service applications. Triple offset design ensures zero leakage, excellent sealing performance, and extended service life.
Size: 14"
Rating: 150LB
Material: ASTM A217 C5
Designed for thermal resistance and strength
Disc: ASTM A217 C5
Extended Yoke: ASTM A182 F5 for elevated temperature applications
Material: Stainless Steel 416 (SS416)
Provides high strength and wear resistance
Seat: ASTM A182 F5, replaceable
Seal: SS316 + Graphite laminated for reliable sealing at high temperatures
Standard: Gear unit
Other actuation methods available upon request
The Thermal Triple Offset Butterfly Valve is a premium isolation valve engineered for demanding high-temperature applications, delivering exceptional corrosion resistance and longevity in thermal fluid systems. Its innovative triple offset design—incorporating offsets in the stem centerline, disc plane, and conical seating angle—eliminates rubbing between the seat and seal during operation, reducing torque by up to 50% and extending service life compared to double offset or concentric valves. Constructed from high-strength materials like ASTM A216 WCB carbon steel or CF8M stainless steel for the body, with Inconel or Stellite overlays on the disc and seat, this high temperature butterfly valve withstands thermal cycling from -196°C to 815°C, making it perfect for steam bypass lines, hot gas ducts, and superheated fluid control in power plants and refineries.
This triple offset valve operates on a quarter-turn mechanism, where the metal-to-metal torque seating provides bi-directional bubble-tight shutoff without relying on position seating, ensuring compliance with API 609 Category B and ISO 15848-1 for emissions control. Available in sizes from 3" to 100" (DN80 to DN2500) and pressure classes from ASME 150 to 1500, it supports wafer, lug, or double-flanged end connections per ASME B16.10 face-to-face dimensions. The laminated graphite or flexible Inconel seal ring accommodates thermal expansion, preventing jamming and maintaining airtightness even under pressure peaks up to 100 bar. Certified for fire-safe API 607 performance, it includes anti-blowout stems and blowout-proof shafts for enhanced safety in industrial isolation valve duties.
Key to its thermal resilience is the precision-machined conical seating geometry, which distributes uniform contact stress across the seal, minimizing deformation at elevated temperatures. Unlike resilient-seated valves, the metal seated valve variant resists erosion from abrasive media like fly ash or corrosive gases, with surface treatments such as electroless nickel plating or ceramic coatings boosting abrasion resistance. The valve's low torque requirements—often under 200 Nm for 12" sizes—enable compatibility with manual gears, electric, or pneumatic actuators via ISO 5211 mounting pads, facilitating automation in SCADA-integrated systems. Rigorous testing, including 10,000-cycle endurance per API RP 591 and thermal-structural finite element analysis, confirms integrity under cyclic loading and temperatures exceeding 600°C in molten salt or thermal oil applications.
In comparison to gate or ball valves, the thermal butterfly valve offers up to 70% weight reduction and 50% space savings, lowering installation costs while providing equivalent or superior shutoff in high-vibration environments. Its non-rubbing action extends seat life by three to five times, reducing maintenance intervals and downtime in critical processes like combined cycle power plants or petrochemical cracking units. Custom configurations, such as extended bonnets for insulation or cryogenic extensions for LNG service, ensure versatility for high temperature butterfly projects. The valve's ability to handle bidirectional flow with minimal pressure drop (Cv values up to 500,000) optimizes energy efficiency in throttling or on-off isolation.
Addressing challenges like thermal distortion, seat wear, and fugitive emissions in industrial isolation valve applications, this triple offset valve incorporates O-ring stem seals for a dry shaft and RFID traceability (ValvTrac™) for asset management. With a minimum tensile strength of 485 MPa and yield strength of 260 MPa, it guarantees structural stability under ASME Section VIII pressure vessel codes. Optional SIL 3 certification per IEC 61508 supports safety instrumented systems, while eco-friendly designs minimize leakage to meet EPA and TA-Luft standards. Overall, the Thermal Triple Offset Butterfly Valve delivers unmatched reliability, safety, and cost savings for engineers tackling extreme thermal conditions in global industrial operations.
Engineered for extreme thermal challenges with zero-leakage sealing and minimal maintenance.
| Organization | Standard | Description |
|---|---|---|
| ANSI | American National Standards Institute | General industrial standards |
| API | American Petroleum Institute | Standards for oil and gas industry |
| ASME | American Society of Mechanical Engineers | Boiler and pressure vessel codes |
| BS | British Standards | UK national standards |
| GB, JB, HG | China Valve Standards | Chinese national and industry standards |
Upstream, midstream, and downstream operations, including drilling, refining, and transportation.
Handling corrosive and hazardous chemicals in various chemical plants.
Steam, water, and fuel systems in thermal, nuclear, and hydroelectric plants.
Municipal water supply, wastewater treatment, and industrial water management.
Heating, ventilation, and air conditioning systems in commercial and industrial buildings.
Sterile and hygienic applications, precise flow control in sensitive industries.
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