Worm Gear Butterfly Valve, API 609, WCB, 44 Inch, 900 LB, BW

Detail Information

Product Name: Worm Gear Butterfly Valve
Type: Triple Eccentric Butterfly Valve
Design Standard: API 609
Body Material: ASTM A216 WCB
Size: 44 Inch, DN1100
Pressure: Class 900 LB, PN150
End Connection: Butt Welding
Operation: Worm Gear
Medium: Water, Oil, Gas, etc
Temperature Range: -196°C to 550°C

Triple Eccentric Butterfly Valves offer a comprehensive solution for demanding applications across industries such as hydrocarbons, power generation, chemical processing, and fertilizers. These valves are available in a wide range of pressure classes, body configurations, and materials, designed to meet critical process conditions. The standard range covers ASME Class up to 600 LB, sizes up to 64 Inch (DN1600), and materials including carbon steel, stainless steel, and alloy steels, capable of withstanding temperatures up to 538°C (1000°F).
For specialized requirements, we provide valves in higher pressure classes, larger diameters, and alternate materials, including those suitable for cryogenic services. These metal-seated valves are fully compliant with API 609 and offer true bi-directional, high-integrity sealing. Manufactured using advanced 5-axis machining centers and custom welding systems, our valves ensure precision, durability, and performance in the most challenging environments.

Technical Specifications

» Type: Triple Eccentric Butterfly Valve
» Size Range: 2-44 Inch (DN50-DN1100); Larger sizes available upon request
» Pressure Rating: Class 150-900 LB (PN10-PN150)
» Body Materials: Carbon Steel (ASTM A216 WCB), Stainless Steel (ASTM A351 CF8, CF8M, CF3, CF3M), Low-Temperature Carbon Steel (ASTM A352 LCB, LCC)
» Shaft Materials: 17-4PH, SS410, XM-19
» Seat Options: Fully Metal Seat, SS + Graphite Composite Seat
» Temperature Range:
Standard Metal Seat: -29°C to 425°C
Cryogenic Metal Seat: -196°C to 121°C
» End Connections: Wafer, Lugged, Double Flanged, Butt Weld, Grooved
» Operation Methods: Handle, Worm Gear, Pneumatic, Electric
» Actuation Options: Manual, Pneumatic, Electric, Hydraulic, Counterweight, Electro-Hydraulic

Product Features

» Lockable lever for secure positioning
» On-site maintenance capability
» Easy integration with automation systems
» Reliable tight shut-off performance
» Optional ISO 5211-compatible top flange
» Suitable for both gaseous and liquid media
» Wide selection of body and trim materials for diverse service conditions
» Compliance with international 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.