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MSS SP 68

High Pressure Butterfly Valves with Offset Design

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Organization: MSS
Publication Date: 1 January 2011
Status: inactive
Page Count: 10
scope:

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.

This standard practice covers flangeless (wafer type) and single flanged (lug type) body designs, compatible with ASME/ANSI B16.5 flanges for sizes NPS 3 (DN 80) through NPS 24 (DN 600) and ASME/ANSI B16.47 Series A flanges for sizes NPS 30 (DN 750) through NPS 48 (DN 1200). Reference Tables 1 and 2.

This standard practice covers valves having body pressure temperature ratings in accordance with ASME/ANSI B16.34.

Definitions may be found in MSS SP 96.

Document History

SP-68
January 1, 2021
High Pressure Butterfly Valves with Offset Design
A description is not available for this item.
MSS SP 68
January 1, 2017
High Pressure Butterfly Valves with Offset Design
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...
MSS SP 68
January 1, 2011
High Pressure Butterfly Valves with Offset Design
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...
MSS SP 68
January 1, 1997
High Pressure Butterfly Valves with Offset Design
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...
MSS SP 68
January 1, 1997
High Pressure Butterfly Valves with Offset Design
A description is not available for this item.
SP-68
January 1, 1988
High Pressure-Offset Seat Butterfly Valves
A description is not available for this item.
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References

This document references:
B16.10 - Face-to-Face and End-to-End Dimensions of Valves
Published by ASME on June 20, 2022
General Application. This Standard covers face-to-face and end-to-end dimensions of straightway valves, and center-to-face and center-to-end dimensions of angle valves. Its purpose is to ensure...
This document references:
API STD 609 - Butterfly Valves: Double-flanged, Lug-and Wafer-type
Published by API on February 1, 2016
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,...
This document references:
ASME B1.1 - Unified Inch Screw Threads (UN and UNR Thread Form)
Published by ASME on January 1, 2019
This Standard specifies the thread form, series, class, allowance, tolerance, and designation for unified screw threads. (In order to emphasize that unified screw threads are based on inch modules,...
This document references:
ISO 5752 - Metal Valves for Use in Flanged Pipe Systems - Face-to-Face and Centre-to-Face Dimensions
Published by ISO on January 1, 1982
Scope and field of application This International Standard specifies the basic series of face-to-face or centre-to-face dimensions for two-way metal valves used in flanged pipe systems. Each basic...
This document references:
MSS SP 96 - Terminology for Valves, Fittings, and Their Related Components
Published by MSS on January 1, 2017
This Standard Practice lists and defines principle terms, acronyms, and abbreviations that are widely used to describe valves, fittings, and their related components. It is comprised of separate...
This document references:
API STD 609 - Butterfly Valves: Double-flanged, Lug-and Wafer-type
Published by API on February 1, 2016
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,...
This document references:
B16.10 - Face-to-Face and End-to-End Dimensions of Valves
Published by ASME on June 20, 2022
General Application. This Standard covers face-to-face and end-to-end dimensions of straightway valves, and center-to-face and center-to-end dimensions of angle valves. Its purpose is to ensure...
This document is referenced by:
SP-92 - Valve User Guide
Published by MSS on January 1, 2021
This Guide presents information which should be helpful to users desiring to avoid the most obvious causes of problems with valves. The information is divided into five main sections: “References”,...
This document is referenced by:
ASME COMPANION GUIDE V1 - Companion Guide to the ASME Boiler and Pressure Vessel Codes - Volume 1
Published by ASME on January 1, 2018
Section I applies to several types of boilers and components of boilers, such as economizers, superheaters, reheaters, and in some circumstances feedwater heaters. Although its title is Power...
This document is referenced by:
MSS SP 144 - Pressure-Seal Bonnet Valves
Published by MSS on January 1, 2020
This Standard Practice covers construction requirements for steel and alloy valves having pressure-seal bonnets in the size range of NPS 2 (DN 50) through NPS 50 (DN 1250) and Pressure Classes 600,...
This document is referenced by:
MSS SP 80 - Bronze Gate, Globe, Angle, and Check Valves
Published by MSS on January 1, 2019
This Standard Practice establishes requirements for bronze gate, globe, angle, and check valves for general purpose services and provides requirements for the following: a) Pressure-Temperature...
This document is referenced by:
MSS SP 137 - Quality Standard for Positive Material Identification of Metal Valves, Flanges, Fittings, and Other Piping Components
Published by MSS on January 1, 2020
This Standard Practice provides methods and acceptance standards for Positive Material Identification (PMI) of metal flanges, fittings, valves, pressure boundary parts of valves, and other piping...
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