ASTM A351 CF8C Butterfly Valve, API 609, 16 Inch, CL600, BW

Product Name: ASTM A351 CF8C Triple Eccentric Butterfly Valve
Design Standard: API 609
Body Material: ASTM A351 CF8C
Size: 16 Inch, DN400
Pressure: Class 600 LB, PN100
End Connection: Butt Welding
Operation: Gearbox

We offer a wide range of Triple Eccentric Butterfly Valves, designed to meet critical process requirements across various industries, including hydrocarbons, power, chemicals, and fertilizers. These valves are available in different pressure classes, body styles, and materials, with sizes ranging up to 64 Inch (DN1600 mm) and pressure ratings up to ASME Class 600 LB. The valves are suitable for temperatures up to 538°C (1000°F) and are made from materials such as carbon steel, stainless steel, and alloy steels. For specific customer needs, valves in higher pressure classes, larger sizes, and other materials are available, including options for cryogenic services. The metal-seated valves conform to API 609 standards and are bi-directional with high-integrity sealing. All machining operations are performed on advanced 5-axis machining centers, and customized welding machines are used for precise manufacturing.

Technical Specifications

» Size Range: 2-40 Inch (DN50-DN1000) (Larger sizes 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 Temp Steel (ASTM A352 LCB/LCC)
» Shaft Material: 17-4PH, SS 410, 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
» End Connections: Wafer, Lugged, Double Flanged, Butt Weld, Grooved
» Actuators: Manual, Pneumatic, Electric, Hydraulic, Counterweight, Electro-hydraulic
» Medium: Water, Gas, Oil, etc.

Product Features

» Lockable Lever: Provides secure operation.
» Site Maintenance: Easy to maintain on-site for convenience.
» Ease of Automation: Facilitates smooth automation integration.
» Positive Tight Shut-Off: Ensures reliable sealing for leak prevention.
» Optional Top Flanges to ISO 5211: Allows direct actuator mounting.
» Qualified for Gaseous and Liquid Services: Suitable for a wide range of applications.
» Variety of Body and Trim Materials: Offers options for diverse medium services.
» Compliant with Standards: ISO 5752, BS 5155, API 609, MSS-SP-68, ASME B16.10, ASME B16.5, 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: