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  • BSI
    BS ISO 6358-1:2013+A1:2020 Pneumatic fluid power. Determination of flow-rate characteristics of components using compressible fluids - General rules and test methods for steady-state flow
    Edition: 2020
    $569.57
    / user per year

Description of BS ISO 6358-1:2013+A1:2020 2020

This part of ISO 6358 specifies a steady-state method for testing pneumatic fluid power components that use compressible fluids, i.e. gases, and that have internal flow paths that can be either fixed or variable in size, to determine their flow-rate characteristics. However, this part of ISO 6358 does not apply to components whose flow coefficient is unstable during use, i.e. components that exhibit remarkable hysteretic behaviour (because they can contain flexible parts that deform under the flow) or that have an internal feedback phenomenon (such as regulators). In addition, it does not apply to components that exchange energy with the fluid during flow-rate measurement, e.g. cylinders, accumulators, etc.

Table 1 provides a summary of which parts of ISO 6358 can be applied to various components.

Table 1

Application of ISO 6358 test methods to components

Components Constant
upstream pressure test 		Variable
upstream pressure test
ISO 6358‑1
constant upstream pressure test 		ISO 6358‑2 charge test ISO 6358‑1
variable upstream pressure test 		ISO 6358‑2 discharge test
Group 1 Directional control valves yes yes yes yes
Flow control valves yes yes yes yes
Connectors yes yes yes yes
Valve manifolds yes yes yes yes
Group of components yes yes yes yes
Group 2 Filters and lubricators yes no no no
Non-return (check) valves yes no no no
Tubes and hoses yes no no no
Group 3 Silencers and exhaust oil mist separators no no yes yes
Blow nozzles no no yes yes
Quick-exhaust valves no no yes yes
Cylinder end heads no no yes yes

This part of ISO 6358 specifies requirements for the test installation, the test procedure, and the presentation of results for the steady-state method.

This part of ISO 6358 includes several test procedures, including the one described in Annex A, which is from ISO 6358:1989. Flowmeter calibration is described in Annex B. Evaluation of measurement uncertainties is described in Annex C. Observations of the error in the test results are described in Annex D. Equations and graphical representations of flow-rate characteristics are given in Annex E. Guidance on the use of practical units for the presentation of results is given in Annex F. Test results using commercially available pneumatic components are given in Annex G. Guidance on calculating the flow-rate characteristics is given in Annex H. A1_startA method for evaluating the flow ability of pneumatic components using effective conductance, Ca, is given in Annex I.A1_end



Standard NumberBS ISO 6358-1:2013+A1:2020
TitlePneumatic fluid power. Determination of flow-rate characteristics of components using compressible fluids - General rules and test methods for steady-state flow
StatusUnder Review
Publication Date2020-07-15
Identical National Standard OfISO 6358-1:2013/Amd.1:2020
AmendsBS ISO 6358-1:2013
DescriptorsTesting conditions, Pneumatic transmission systems, Grades (quality), Flow rates, Flow measurement, Errors, Pneumatic equipment, Fluid equipment, Compressible flow, Test equipment, Accuracy, Formulae (mathematics), Fluid equipment components
ICS23.100.01 Fluid power systems in general
CommitteeMCE/18/-/5
ISBN978 0 539 01109 8
PublisherBSI
Pages76

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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