Float operated valves Specification for diaphragm type float operated valves (plastics bodied) for cold water services only (excluding floats)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

31-12-1990

Publisher

British Standards Institution

Committees responsible
Foreword
Section 1. General
1 Scope
2 Definitions
3 Designation for ordering
4 Marking
Section 2. Materials
5 Effect of non-metallic materials on water quality
6 Plastics
7 Metals
Section 3. Design, construction and dimensions
8 Inlet connection
9 Seats
10 Backnuts
11 Float arm or float arm assembly
12 Discharge arrangement
Section 4. Performance
13 Distortion and deflection
14 Hydraulic pressure
15 Backflow prevention
16 Flow
17 Endurance
Appendix A - Distortion test for backnuts and inlet shank
Appendix B - Diaphragm type float operated valve assembly test
Appendix C - Float attachment thread distortion test
Appendix D - Shut-off pressure test
Appendix E - Method of test for effect of dynamic pressure
on discharge arrangement
Appendix F - Backflow prevention test
Appendix G - Flow test
Appendix H - Endurance test
Publications referred to

Operational requirements.

This Part of BS 1212 specifies the performance requirements, materials, certain dimensions and tolerances of diaphragm type float operated valves (plastics bodied) of nominal size ½ for cold water services only, capable of accepting interchangeable low or high pressure renewable seats for use at pressure up to and including 3 bar¹⁾ and up to and including 14 bar respectively (see 9.1) and intended for use with 114 S or 114 NS floats (plastics) conforming to BS 2456.

NOTE 1 The nominal size is that corresponding with the Class G ½ B pipe thread specified in BS 2779.

NOTE 2 The titles of the publications referred to in this standard are listed on the inside back cover.

Committee	B/504
DevelopmentNote	Supersedes 88/14227 DC and BS 1212-3(1979). (06/2005) Reviewed and confirmed by BSI, March 2013. (03/2013)
DocumentType	Standard
Pages	22
PublisherName	British Standards Institution
Status	Current
Supersedes	BS 1212-3:1979

BS 2456:1990	Specification for floats (plastics) for float operated valves for cold water services
BS 4118:1981	Glossary of sanitation terms
BS 2871-1:1971	Specification for copper and copper alloys. Tubes Copper tubes for water, gas and sanitation
BS 1134:1961	Centre-line-average height method for the assessment of surface texture
BS 970-4:1970	Specification for wrought steels for mechanical and allied engineering purposes Valve steels
BS 2873:1969	Specification for copper and copper alloys. Wire

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BS 1212-3:1990

Float operated valves Specification for diaphragm type float operated valves (plastics bodied) for cold water services only (excluding floats)

Table of Contents

Abstract

Scope

General Product Information

Standards Referencing This Book

Category

Subcategory