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About This Item
Full Description
SCOPE
1.1 This Standard Practice covers design requirements, test performance, marking requirements, and nomenclature for butterfly valves designed for high pressure performance, having a seat plane offset from the plane of the stem centerline.
1.2 This Standard Practice covers flangeless (wafer-type) and single flange (lug-type) body designs, compatible with ASME B16.5 flanges for sizes NPS 3 (DN 80) through NPS 24 (DN 600) and ASME B16.47 Series A flanges for sizes NPS 30 (DN 750) through NPS 48 (DN 1200). Reference Tables 1 and 2.
1.3 This Standard Practice covers valves having body pressure-temperature ratings in accordance with ASME B16.34.
1.4 For common industry terms and definitions that may appear in this Standard Practice, refer to MSS SP-96.
Document History
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MSS SP-68-2021
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High Pressure Butterfly Valves with Offset Design- Most Recent
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MSS SP-68-2017
High Pressure Butterfly Valves with Offset Design- Historical Version
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MSS SP-68-2011
High Pressure Butterfly Valves with Offset Design- Historical Version
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MSS SP-68-1997 (R2004)
High Pressure Butterfly Valves with Offset Design- Historical Version