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About This Item
Full Description
1. SCOPE
1.1 This Standard Practice covers dimensions, design, testing, and marking requirements for butterfly valves. Further reference should be made to MSS SP-68.
1.2 This Standard Practice covers two types fo butterfly valves:
Type I - Valves for tight shut-off (tested per subsection 10.2.1)
Type II - Valves permitting seat leakage (see subsection 10.2.2)
1.3 This Standard Practice covers flangeless (wafer-type), single flange (lug-type), and flanged end valves in sizes 1½ NPS through 72 NPS, grooved end valves, and shouldered end valves with pressure ratings in accordance with the requirements of Sections 3 and 4.
Document History
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MSS SP-67-2022
Butterfly Valves- Most Recent
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MSS SP-67-2017
Butterfly Valves, Includes Errata (2017)- Historical Version
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MSS SP-67-2011
Butterfly Valves- Historical Version
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MSS SP-67-2002a
viewing
Butterfly Valves- Historical Version
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MSS SP-67-2002
Butterfly Valves- Historical Version
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MSS SP-67-1995
Butterfly Valves- Historical Version