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MSS SP 68

High Pressure Butterfly Valves with Offset Design

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Organization: MSS
Publication Date: 1 January 2017
Status: active
Page Count: 14
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 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.

This Standard Practice covers valves having body pressure temperature ratings in accordance with ASME 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:
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:
SP-67 - Butterfly Valves
Published by MSS on January 1, 2022
This Standard Practice covers dimensions, design, testing, and marking requirements for butterfly valves. Further reference should be made to the MSS SP-68. This Standard Practice covers two types of...
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:
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:
ASME B16.34 - Valves — Flanged, Threaded, and Welding End
Published by ASME on January 1, 2020
This Standard applies to new construction and covers pressure–temperature ratings, dimensions, tolerances, materials, nondestructive examination requirements, testing, and marking for cast, forged,...
This document references:
ASME B16.47 - Large Diameter Steel Flanges NPS 26 Through NPS 60 Metric/Inch Standard
Published by ASME on January 1, 2020
This Standard covers pressure–temperature ratings, materials, dimensions, tolerances, marking, and testing for pipe flanges in sizes NPS 26 through NPS 60. Included are flanges with rating class...
This document references:
SP-67 - Butterfly Valves
Published by MSS on January 1, 2022
This Standard Practice covers dimensions, design, testing, and marking requirements for butterfly valves. Further reference should be made to the MSS SP-68. This Standard Practice covers two types of...
This document is referenced by:
CSA B44 - Safety Code for Elevators and Escalators Includes Requirements for Elevators, Escalators, Dumbwaiters, Moving Walks, Material Lifts, and Dumbwaiters With Automatic Transfer Devices
Published by CSA on January 1, 2019
Equipment Covered by This Code This Code covers the design, construction, operation, inspection, testing, maintenance, alteration, and repair of the following equipment and its associated parts,...
This document is referenced by:
AWWA C519 - High-Performance Waterworks Butterfly Valves-3 In. (75 mm) Through 60 In. (1,500 mm)
Published by AWWA on June 9, 2018
This standard establishes minimum requirements for high-performance butterfly valves, 3 in. (75 mm) through 60 in. (1,500 mm) in diameter, with various body and end types, for raw, potable, and...
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