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- Secure PDF 🔒
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About This Item
Full Description
Category A-Manufacturer's rated cold working pressure (CWP) butterfly valves, usually with a concentric disc and seat configuration. Sizes covered are NPS 2 to NPS 48 for valves having ASME Class 125 or Class 150 flange bolting patterns.
Category B-ASME Class and pressure-temperature rated butterfly valves that have an offset seat and either an eccentric or a concentric disc configuration. These valves may have a seat rating less than the body rating. For lug and wafer, Class 150, 300, and 600, sizes covered are NPS 3 to NPS 24. For double flanged long pattern, Class 150, 300, and 600, sizes covered are NPS 3 to NPS 36. For double flanged short pattern, Class 150 and 300, sizes covered are NPS 3 to NPS 48. For double-flanged short pattern, Class 600, sizes covered are NPS 3 to NPS 24.
Document History
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API Std 609
Butterfly Valves: Double-flanged, Lug- and Wafer-type, and Butt-welding Ends, Ninth Edition- Most Recent
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API Std 609
Butterfly Valves: Double-flanged, Lug- and Wafer-type, Eighth Edition, Includes Errata (April 2017)- Historical Version
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API Std 609
viewing
Butterfly Valves: Double-flanged, Lug- and Wafer-type, Seventh Edition- Historical Version
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API Std 609
Butterfly Valves: Double Flanged, Lug- and Wafer-Type- Historical Version
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API 609
Butterfly Valves: Lug- and Wafer-Type- Historical Version