1. Standard Definition
API 609 is the American Petroleum Institute's (API) industry standard for Wafer Type Butterfly Valves, specifically designed for biflanged, lugged, and Wafer Type Butterfly Valves, covering materials, testing, and performance requirements.
2. Scope of Application and Technical Requirements
Applicable Butterfly Valve Types
The standard includes Double Flanged, Lug-Type, and Wafer Type Butterfly Valves, covering grey cast iron, ductile cast iron, bronze, steel, nickel-based alloy, and other materials.
Emphasis is placed on the tightness of the valve in the closed state, making it suitable for flow regulation and fluid cut-off scenarios.
Core Parameter Requirements
Structure Length: API 609 defines the face-to-face length (structure length) of butterfly valves, which is divided into two types: short type and long type, and directly affects the weight, price and installation suitability of the valve.
Connection Standards: Flange connection dimensions should comply with ASME B16.5 to ensure compatibility with piping systems.
Material and Sealing: The butterfly plate sealing ring can be selected from a metal + graphite multi-layer structure or soft sealing materials (such as NBR, PTFE), the valve body is commonly used CF8, CF8M and other stainless steel materials.
3. the Significance of Certification
API 609 certification is an authoritative proof that the butterfly valve products comply with international industry standards, indicating that its design, manufacturing, and testing processes meet the stringent requirements of oil, natural gas, and other high-pressure fluid transport.
Through certification, an enterprise (such as nuclear technology, Bonide Valve) can enhance the competitiveness of its products in the market and gain access to the international petrochemical industry.
