API Standards Compliance
API 609: This is the primary standard for butterfly valves in the petroleum and natural gas industries, covering design, materials, pressure-temperature ratings, and testing.
API 607/6FA: Fire-safe certification for valves to ensure they can withstand fire exposure without catastrophic failure.
API 598: Valve inspection and testing requirements to ensure leak-tight performance.
Robust Design & Construction
Lug-style body: Allows easy installation between flanges without nuts, making maintenance simpler.
High-performance design: Double or triple offset to reduce wear and ensure bubble-tight shut-off.
Pressure rating: Typically ANSI Class 150 to Class 600 (or higher for specialized applications).
Temperature range: Suitable for extreme conditions (cryogenic to high-temperature services).
Premium Materials
Body materials: Carbon steel (ASTM A216 WCB), stainless steel (ASTM A351 CF8/CF8M), duplex/super duplex for corrosive environments.
Disc materials: Stainless steel (316SS), alloy 20, or coated for erosion resistance.
Seat materials: PTFE, reinforced PTFE, metal-seated for high-temperature/fire-safe applications.
Stem: Forged stainless steel (17-4PH or 316SS) for high strength and corrosion resistance.
Superior Sealing & Performance
Bubble-tight shut-off: Achieved with resilient or metal-seated designs.
Low torque operation: Eccentric design reduces operating torque, extending actuator life.
Fire-safe design: Meets API 607/6FA standards to prevent leakage in case of fire.
What are the common materials used for API valves?
Applicability of API Globe Valves
API Low Temperature Valve Characteristics