Flanged Butterfly Valve is one of the triple offset butterfly valves, It is suitable for both shut off and throttling service. The triple offset design incorporates torques in seating for tight shutoff or control even in the roughest applications. Industries where the triple offset butterfly valves are widely used include power, refining, petrochemical, chemical and pulp & paper.

VALVE DESIGN DATA

Size: 1"-40"

Nominal pres sure:  Class 150Lb-300Lb PN1.6-4.0MPa
Material:  WCB,LCB,CF8,CF8M,CF3,CF3M,A105,LF2,F304,F316,F304L,F316L
Design & Manufacture Std.:  API 609、GB/T12338
Face to Face Std.: ANSI B16.34 、API 608 、API 6D
Flange、Thread End Connection Std.: ASME B16.5、 ANSI B1.20.1
API  609   Butterfly Valves:Double Flanged, Lug- andWafer-Type
API 608 is intended to provide the similar additional requirements for steel and alloy steel ball valves beyond
ASME B16.34 as do the following API standards for other valve types:
API  594,  Check Valves: Flanged, Lug, Wafer and Butt-welding   
API Standard 599, Metal Plug Valves—Flanged, Threaded and Welding Ends
API Standard 600, Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas Industries
API Standard 602, Steel Gate, Globe and Check Valves for Sizes DN 100 and Smaller for the Petroleum and Natural Gas Industries
API Standard 603, Corrosion-resistant, Bolted Bonnet Gate Valves Flanged and Butt-welding Ends
API 609, Butterfly Valves: Double Flanged, Lug and Wafer-type 
ASME B1.20.1, Pipe Threads, General Purpose (Inch)
ASME B16.5, Pipe Flanges and Flanged Fittings NPS 
ASME B16.10, Face-to-Face and End-to-End Dimensions
ASME B16.11, Forged Fittings, Socket-welding and Threaded
ASME B16.20, Metallic Gaskets for Pipe Flanges—Ring-joint, Spiral-wound and Jacketed 
ASME B16.25, Butt Welding Ends
ASME B31.3  Process Piping
API 6FA  Fire Testing of Valves
API Std 598  Valve Inspection and Testing

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