Pneumatic Actuated Butterfly Valve, A351 CF8, 48 IN, 150 LB

Product Name: Triple Eccentric Butterfly Valve, Bi-directional, Metal Seated
Design Standard: API 609
Body Material: ASTM A351 CF8
Size: DN1200, 48 Inch
Pressure: PN16, Class 150 LB
End Connection: Double Flange
Operation: Pneumatic Actuated

We offer a diverse selection of Triple Eccentric Butterfly Valves, designed to meet the critical process needs of industries such as hydrocarbons, power generation, chemicals, and fertilizers. These valves are available in a wide range of pressure classes, body styles, and materials, with sizes reaching up to 64" (1600 mm) and capable of handling temperatures up to 538°C (1000°F). The product line includes valves in ASME classes up to 600 and can be customized for higher pressure ratings, larger sizes, or alternative materials as required by the customer. KOSEN also offers valves designed for cryogenic applications. Conforming to API 609, these triple-offset valves are bi-directional and provide high-integrity sealing. All machining operations are performed on 5-axis machining centers, and customized welding machines ensure the highest precision in 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 for secure operation
» Easy maintenance on-site
» Simple automation options
» Positive tight shut-off for leak-proof operation
» Optional top flanges to ISO 5211 for actuator mounting
» Suitable for both gaseous and liquid services
» Wide variety of body and trim materials for different medium services
» Compliance with 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: