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API Standard 609 Butterfly Valves: Double-flanged, Lug-and Wafer-type EIGHTH EDITION | FEBRUARY 2016 2016 | 36 PAGES | $ 105.00 | PRODUCT NO. C60908
This standard covers design, materials, face-to-face dimensions, pressure-temperature ratings, and examination, inspection and test requirements for gray iron, ductile iron, bronze, steel, nickel-based alloy, or special alloy butterfly valves.
For ordering information: Online: www.api.org/pubs Phone: 1-800-854-7179 (Toll-free in the U.S. and Canada)
The following two categories of butterfly valves are included. a)
b)
Category Catego ry A—Manuf A—Manufact acturer urer’s ’s rated rated cold cold working 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 Catego ry B—ASME B—ASME Class Class and pressu pressurere-temp temperat erature ure 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. Sizes covered are listed below.
For lug and wafer, Class 150: NPS 3 to NPS 48. For lug and wafer, Class 300 and Class 600: NPS 3 to NPS 48.
For double-flanged long pattern, Class 150, 300, and 600: NPS 3 to NPS 36.
For double-flanged short pattern, Class 150 and Class 300: NPS 3 to NPS 48.
For double-flanged short pattern, Class 600: NPS 3 to NPS 24. Valve configurations include double flanged, lug- and wafer-type with facings that permits installation between ASME and MSS flanges that conform to the standards and specifications listed in Section 2. Typical valve construction and nomenclature for valve parts are shown in Annex C.
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API members receive a 30% 3 0% discount where applicable.