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BS 1212-1:1990

Current

Current

The latest, up-to-date edition.

Float operated valves Specification for piston type float operated valves (copper alloy body) (excluding floats)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

29-06-1990

€243.07
Excluding VAT

Foreword
Committees responsible
Specification
Section one. General
1 Scope
2 Definition
3 Designation for ordering
4 Marking
Section two. Materials
5 Quality and finish
6 Plastics
7 Castings
8 Hot stampings
9 Mouldings
10 Machining
Section three. Design, construction and dimensions
11 General
12 Screw threads
13 Inlet connections
14 Backnuts
15 Bodies
16 Body coupling nuts
17 Body end caps
18 Pistons and piston washers
19 Seats
20 Levers
21 Locknuts for levers
22 Float adjusters and thumb screws
23 Split cotter pins
Section four. Performance
24 Hydraulic pressure and shut-off
25 Backnut distortion
26 Locknut distortion
27 Mechanical strength of levers
Appendices
A Method of test for shut-off when assembled with
    appropriate float
B Method of test for distortion of size 1/2 plastics
    backnuts
C Method of test for distortion of plastics locknuts
D Method of test for mechanical strength of levers
E Discharge of water through piston type float
    operated valves
Tables
1 Materials
2 Body, seat and float combination
3 Side entry inlet shank and inlet for connection to
    12 mm and 15 mm copper tube
4 Type (a) backnuts (integral flange)
5 Type (b) backnuts (spigoted)
6 Type (c) backnuts (fixed flange)
7 Bodies
8 Body coupling nuts
9 Body end cap
10 Pistons and piston washers
11 Seats and joint ring for seats
12 Seat numbers
13 Levers
14 Test loads for levers
15 Computed flow through seat orifices
Figures
1 Section of typical size 1/2 piston type float
    operated valve with detail of inlet and alternative
    lever arm
2 Inlet shank
3 Inlet elbows
4 Backnuts
5 Bodies
6 Body coupling nuts
7 Body end cap
8 Pistons and piston washers
9 Seats and joint ring for seats
10 Levers and socket for soldered joint for two piece
    levers
11 Float adjuster, thumb screw and split cotter pin

Specifies materials, workmanship, dimensions and performance requirements for piston type valves of nominal size 3/8, 1/2, 3/4, 1, 11/4, 11/2 and 2, intended for use with floats complying with the requirements of BS 1968 and BS 2456.

Committee
B/504
DevelopmentNote
Supersedes BS 1212-1(1953) and 83/11864 DC. (06/2005) Reviewed and confirmed by BSI, March 2013. (03/2013)
DocumentType
Standard
Pages
37
PublisherName
British Standards Institution
Status
Current
Supersedes

This Part of BS 1212 specifies materials, dimensions, tolerances and performance requirements for piston type float operated valves (copper alloy body) of nominal sizes ⅜, ½, ¾, 1, 1¼, 1½ and 2 with six patterns of body, designated 1, II, III, IV, V and VI, intended for use with floats complying with BS 1968 and BS2456.

NOTE 1. The nominal sizes correspond with the pipe size of the thread on the inlet shank as specified in BS 2779. The nominal sizes ⅜ and 1 ¾ are formed by making special inlets on the Sizes ½ and 1 ½ respectively. Nominal sizes ⅜ and ½ are made in body form pattern I or II.

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

BS 1574:1994 Specification for split pins (inch series)
BS 2456:1990 Specification for floats (plastics) for float operated valves for cold water services
BS 6700:1997 Specification for design, installation, testing and maintenance of services supplying water for domestic use within buildings and their curtilages
BS 1083:1965 Specification for precision hexagon bolts, screws and nuts (B.S.W. & B.S.F. threads)
BS 2871-1:1971 Specification for copper and copper alloys. Tubes Copper tubes for water, gas and sanitation
BS 2782-3 Method 365B:1981 Methods of testing plastics. Mechanical properties Determination of indentation hardness by means of a durometer (Shore hardness)
BS 1134:1961 Centre-line-average height method for the assessment of surface texture
BS 1968:1953 Specification for floats for ballvalves (copper)
BS 3964:1980 Specification for flexible vulcanized fibre sheets
BS 5219:1975 Wood preservatives. Determination of eradicant action against Hylotrupes bajulus (Linnaeus) larvae (laboratory method)
BS 970-4:1970 Specification for wrought steels for mechanical and allied engineering purposes Valve steels
BS 903-A26:1969 Physical testing of rubber Determination of hardness
BS 1212-3:1979 Specification for float operated valves (excluding floats). Diaphragm type (plastics body) for cold water services
BS 84:1956 Specification for parallel screw threads of Whitworth form
BS 3885:1965 Tolerances for hot brass stampings

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