Product Details

API STD609-2009


API Std 609

Butterfly Valves: Double-flanged, Lug- and Wafer-type

American Petroleum Institute / 01-Apr-2010 /脗聽32 pages
This standard is a purchase specification for butterfly valves designed for installation between flanges specified in ASME B16.1, ASME B16.5, ASME B16.24, and ASME B16.42, Classes 125-600; MSS SP-44, Class 150; and ASME B16.47, Series A, Class 150 (was MSS SP-44 except for certain materials) or Series B (was API 605), Class 150 for the NPS sizes defined herein.
This standard requires the purchaser to specify certain details and features. Although it is recognized that the purchaser may desire to modify, delete, or amplify sections of this standard, it is strongly recommended that such modifications, deletions, and amplifications be made by supplementing this standard, rather than by rewriting or incorporating sections thereof into another complete standard.
API standards are published as an aid to procurement of standardized equipment and materials. These standards are not intended to inhibit purchasers or producers from purchasing or producing products made to specifications other than those of API.

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