API 609 Triple Offset Butterfly Valves, WCB, DN800, PN25, BW

The API 609 Triple Offset Butterfly Valves Factory specializes in manufacturing high-performance valves designed to meet API 609 standards. These valves feature a cast carbon steel body made from ASTM A216 WCB material, ensuring durability and strength. With a nominal diameter of DN800 (32 inches) and a pressure rating of PN25 (Class 300 LB), they are suitable for demanding industrial applications. The valves are equipped with butt welding ends for secure and reliable connections.

Product Name: API 609 Triple Offset Butterfly Valve, Butt Welding
Type: Triple Eccentric Butterfly Valve
Design Standard: API 609
Body Material: ASTM A216 WCB
Size: DN800, 32 Inch
Pressure: PN25, Class 300 LB
End Connection: Butt Welding
Medium: Water, Oil, Gas, etc.
Temperature Range: -196°C to 550°C

We provide a wide array of Triple Eccentric Butterfly Valves designed to meet critical process demands across various industries, including hydrocarbon, power, chemicals, fertilizer, and more. These valves are available in multiple pressure classes, body styles, and materials. The product range includes valves in ASME classes up to 600 LB, with sizes up to 64 Inch (1600 mm). They are constructed from carbon steel, stainless steel, and alloy steels, and are suitable for temperatures as high as 538°C (1000°F). For specific customer requirements, valves in higher pressure classes, larger sizes, and other materials are also available. The range also covers valves for cryogenic services. The metal-seated valves comply with API 609. These Triple Eccentric Butterfly Valves offer true bi-directional functionality and high-integrity sealing. All machining operations are performed on 5-axis machining centers, and customized welding machines are utilized in the manufacturing process.

Technical Specification

» Product: Triple Eccentric Butterfly Valve
» Size Ranges: 2-40 Inch (DN50-DN1000) (Larger sizes upon request)
» Pressure Ratings: Class 150-600 LB (PN10-PN100)
» Body Materials: Carbon Steel (ASTM A216 WCB), Stainless Steel (ASTM A351 CF8, CF8M, CF3, CF3M), Low-Temperature Carbon Steel (ASTM A352 LCB, LCC) 
» Shaft Material: 17-4PH, SS410, XM-19
» Seat Material: Fully metal seat, SS + Graphite Seat
» Operation: Handle, Worm gear, Pneumatic, Electric
» Temperature Range:
Metal Seat: -29°C to 425°C
Metal Seat (Cryogenic): -196°C to 121°C
» Ends Connections: Wafer, Lugged, Double Flanged, Butt Weld or Grooved
» Actuations: Manual, Pneumatic, Electric, Hydraulic, Counterweight, Electro-hydraulic

Product Features

» Lockable Lever: Ensures secure positioning and control.
» Site Maintenance: Facilitates easy maintenance and inspection at the installation site.
» Ease of Automation: Compatible with various automation systems for seamless integration.
» Positive Tight Shut-off: Provides reliable sealing to prevent leaks.
» Optional Top Flanges to ISO 5211: Offers compatibility with standard actuation interfaces.
» Qualified for Both Gaseous and Liquid Services: Suitable for a wide range of media types.
» Broad Line of Body and Trim Materials: Provides versatility for different medium services.
» Compliance with Standards: Meets industry standards such as ISO 5752, BS 5155, API 609, MSS-SP-68, ASME B16.10, ASME B16.5, and DIN 3202.

Triple Offset Butterfly Valve

Triple offset metal sealing butterfly valve uses the three eccentric structure with multi-layer metal seal or pure metal sealing ring, different sealing materials are being used according to the different temperature request from end user.The structure of valve sealing ring that was formed after machining for triple eccentric butterfly valve is oblique cone type, the purpose of which is to let the disc open in a subtle angle and seat sealing surface can be completely separated from the sealing surface of disc, thus to reduce the friction of sealing surface during the open and close.

Triple Offset Frictionless Design

• Offset 1: Offset for seat seal and the rotation center of stem.
• Offset 2: Center of pipe and disc.
• Offset 3: Seat sealing angle center line and flow passage center.
• The triple offset of butterfly valve ensures the valve disc is completely separated from seat sealing surface while open in a slightly angle which could reduce the friction of sealing surface during open and close and opening torque as well as prolong the service life of the sealing surface.
• Our metal sealing butterfly valve adopts multi-layer sealing ring to achieve the valve seal, the multi-layer seal ring is generally made of stainless steel and graphite combination The pure metal sealing can be used for special medium or high temperature.

Seat Structure

• Low Operating Torque: Our butterfly valves combine three offsets. Standard sealing is graphite + metal. Optional PTFE + metal combinations are available for different temperatures and media, using flexible laminated metal and graphite to ensure a tight, uniform seal and reduce operating torque.
• Zero Leakage: Laminated seal rings are self-aligning, allowing the valve to meet zero leakage per API 598.
• Fire-Safe Design: Standard valves are not soft-seated and meet API 607 fire-safe requirements.
• Anti-Blowout Shaft: Double anti-blowout design meets API 609 and ASME B31.1.
• Top Retention: Packing gland follower retains the stem.
• Bottom Retention: T-shaped collar prevents stem blowout.

ISO 5211 Top Mounting

Different End Connections Available: