BS 7438:1991

Withdrawn

Specification for steel and copper alloy wafer check valves, single-disk, spring-loaded type

Available format(s)

Hardcopy , PDF

Withdrawn date

05-22-2020

Language(s)

English

Published date

05-31-1991

Publisher

British Standards Institution

Committees responsible
Foreword
Specification
Section 1. General
1 Scope
2 Definitions
3 Type
4 Nominal sizes
5 Nominal and Class pressure designations
6 Pressure/temperature ratings
7 Dimensions and tolerances
Section 2. Design and operation
8 Design
9 Operation
Section 3. Materials
10 Optional requirements
11 Body material
12 Disk, spring, spring retainer materials
13 Identification plates
Section 4. Testing
14 Production pressure testing
15 Test certificate
Section 5. Marking and packaging
16 Body markings
17 Packaging
Appendix
A Information to be supplied by the purchaser
Tables
1 Dimensions and tolerances of wafer check valves for
    use with PN flanges (type A)
2 Dimensions and tolerances of wafer check valves for
    use with Class designated flanges (type B)
Figures
1 Typical wafer check valve for use with PN flanges
2 Typical wafer check valve for use with Class
    designated flanges

Specifies requirements for pressure/temperature ratings, dimensions, design, materials, testing and marking for nominal sizes DN 15 to DN 100.

Committee	PSE/18/2
DevelopmentNote	Supersedes 90/75853 DC (10/2005) Reviewed and confirmed by BSI, October 2012. (09/2012)
DocumentType	Standard
Pages	14
PublisherName	British Standards Institution
Status	Withdrawn

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