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MSS SP-81-2021

Stainless-Steel or Stainless-Steel-Lined, Bonnetless, Knife Gate Valves with Flanged Ends (Incl. 2022 Errata Sheet)


This Standard Practice covers all stainless-steel or stainless-steel-lined, cast, or fabricated bonnetless, knife gate valves with flanged ends from size NPS 2 (DN 50) through NPS 36 (DN 900).The valves identified in this Standard Practice are intended for use in applications where shockloadings are not encountered. Applications at conditions other than those specified in Section 3 require special design considerations.


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Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. [mss]

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