Triple Eccentric Butterfly Valve, A351 CF8, 24 IN, 400 LB

Dec 31, 2024

Product Name: Triple Eccentric Butterfly Valve, Bi-directional, Metal Seated
Design Standard: API 609
Body Material: ASTM A351 CF8
Size: DN600, 24 Inch
Pressure: PN63, Class 400 LB
End Connection: Double Flange
Operation: Bare Stem

We have a comprehensive range of Triple Eccentric Butterfly Valves designed to meet the critical process requirements across industries such as hydrocarbons, power, chemicals, and fertilizers. These valves are available in various pressure classes, body styles, and materials, with sizes up to 64 Inch (FN1600 mm) and suitable for temperatures as high as 538°C (1000°F). The product range includes valves in ASME classes up to 600 LB, with customization options for higher pressure classes, larger sizes, and different materials based on customer specifications. Our offerings also include valves for cryogenic applications. These metal-seated valves conform to API 609 standards and provide true bi-directional flow with high-integrity sealing. All machining processes are executed on advanced 5-axis machining centers, while custom welding machines ensure precise and high-quality manufacturing.

Technical Specifications

» Size Range: 2-64 Inch (DN50-DN1600), with larger sizes available upon request
» Pressure Ratings: Class 150-600 LB (PN10-PN100)
» Body Material: Carbon Steel (ASTM A216 WCB), Stainless Steel (ASTM A351 CF8, CF8M, CF3, CF3M), Low Temperature 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
» End Connections: Wafer, Lugged, Double Flanged, Butt Weld, Grooved
» Actuations: Manual, Pneumatic, Electric, Hydraulic, Counterweight, Electro-hydraulic
» Temperature Range:
Metal Seat: -29°C to 425°C
Cryogenic Metal Seat: -196°C to 121°C
» Medium: Water, Oil, Gas, etc

Product Features

» Lockable Lever: Offering secure operation, preventing accidental valve manipulation.
» Site Maintenance: Easy on-site maintenance for convenience and reduced downtime.
» Ease of Automation: Simplifying integration into automated systems.
» Positive Tight Shut-off: Ensuring leak-proof operation and secure sealing.
» Optional Top Flanges to ISO 5211: Offering compatibility with various actuator types for enhanced flexibility.
» Qualified for Both Gaseous and Liquid Services: Versatile in handling both gas and liquid media.
» Broad Range of Body and Trim Materials: Available in various materials to suit a wide range of medium services.
» Compliance with Standards: Meeting ISO 5752, BS 5155, API 609, MSS-SP-68, ASME B16.10, ASME B16.5, and DIN 3202 standards.

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.