API 609 / ASME B16.34
Double Eccentric Butterfly Valves are configured for reduced seat wear and reliable shutoff in higher-duty service. Buyers can compare pressure class, size, materials, end connections and operation, then match the valve to the piping class and service conditions.
Available Pressure Classes
Choose the class required by your piping specification to review typical materials, end connections, applications, testing and RFQ information.
Specifications
| Design Standard | API 609 / ASME B16.34 |
|---|---|
| Size Range | 3–72 in |
| Pressure Classes | Class 150, Class 300, Class 600 |
| Body Materials | WCB, CF8M, Duplex 2205 |
| End Connections | Wafer, Lug, Double Flanged |
| Operation | Manual, gear or actuated where applicable |
Selection Guide
Start with the piping class and service conditions, then review disc offset, seat design, shaft arrangement and operator sizing. For quotation, include offset design, seat material, body/disc material, end pattern, operator and shutoff requirement.
Save a PDF summary of the product range, technical specifications, available configurations and RFQ information.
Download PDF DatasheetMaterials
Typical project material options include WCB, CF8M, Duplex 2205. Final material selection should follow corrosion conditions, design temperature, toughness requirements and the approved material specification.
End Connections
Available connection families include Wafer, Lug, Double Flanged. The final facing or weld preparation must match the piping class and approved drawing.
Applications
Process, water, cooling, utilities, power, lng and large-bore isolation. Final suitability depends on fluid, pressure, temperature, cycling and the project specification.
Testing & Documentation
Confirm the required pressure test standard, material certificates, PMI or NDE scope, dimensional inspection, coating records and final document package before production.
Buyer Questions
This product family is organized in Class 150, Class 300, Class 600. Confirm the required class from the piping specification before quotation.
Typical project options in this range include WCB, CF8M, Duplex 2205. Final material selection depends on fluid, design temperature, corrosion conditions and the approved material specification.
Include valve size, pressure class, body and trim material, end connection, operation, quantity, service conditions, testing and documentation requirements.
Engineering Resources
Send size, pressure class, materials, end connection, quantity and service conditions for review.
