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BSI
BS 4979:1986

BS 4979:1986

Withdrawn

Withdrawn

A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.

Methods for aerodynamic testing of constant and variable dual or single duct boxes, single duct units and induction boxes for air distribution systems

Available format(s)

Hardcopy , PDF

Withdrawn date

01-12-2003

Language(s)

English

Published date

30-04-1986

Publisher

British Standards Institution

Foreword
Committees responsible
Specification
1. Scope
2. Definitions
3. Summary of tests
4. Symbols and suffixes
5. Instrumentation
6. Leakage tests
7. Test for flow rate control
8. Boxes with variable rate of air flow at constant
    inlet pressure
9. Test for flow rate characteristics of single duct
    units
10. Test for temperature mixing efficiency of dual
    duct boxes
11. Tests for induction boxes
Tables
1. Symbols
2. Ranges and accuracies of measurement of air flow
    meters not employed for determining leakage rate
3. Ranges and accuracies of measurement of air flow
    meters for determining leakage rate
4. Pressure measuring instruments: range, accuracy
    and scale intervals
5. Pressure differentials
Figures
1. Leakage test, air supply duct
2. Typical air supply arrangement for tests on single
    duct boxes and/or units
3. Typical air supply arrangement for tests on dual
    duct boxes
4. Examples of the determination of 'minimum pressure
    differential'
5. Typical graph resulting from tests described in 8.4
6. Typical graph for tests on a single duct unit
7. Typical air supply arrangement for mixing efficiency
    tests showing location of instrumentation
8. Mixing efficiency: typical outlet duct arrangement
    (single outlet)
9. Mixing efficiency: points of temperature measurement
    in outlet extension duct of multiple outlet box
10. Typical induction box test installation

Methods of test for casing leakage, valve and damper leakage, flow rate control, temperature mixing, induction flow rate and pressure requirements.

Committee
RHE/2
DocumentType
Standard
Pages
26
PublisherName
British Standards Institution
Status
Withdrawn
Supersedes

Standards Relationship
ISO 5220:1981 Similar to

BS 1042-1.1(1981) : 1981 MEASUREMENT OF FLUID FLOW IN CLOSED CONDUITS - SPECIFICATION FOR SQUARE-EDGED ORIFICE PLATES, NOZZLES AND VENTURI TUBES INSERTED IN CIRCULAR CROSS SECTION CONDUITS RUNNING FULL
BS 1042-2.1:1983 Measurement of fluid flow in closed conduits. Velocity area methods Method using Pitot static tubes
BS 1042-1.2(1984) : LATEST SPEC. FOR SQUARE-EDGED ORIFICE PLATES, NOZZLES (WITH DRAIN HOLES, IN PIPES BELOW 50MM DIAMETER, AS INLET AND OUTLET DEVICES) AND OTHER ORIFICE PLATES AND BORDA INLETS

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Hardcopy - English
PDF - English
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