ISO 6358-2-2013 pdf free.Pneumatic fluid power一 Determination of flow-rate characteristics of components using compressible fluids – 一 Part 2: Alternative test methods.
This part of ISO 6358 specifies a discharge test and a charge test as alternative methods for testing pneumatic fluid power components that use compressible fluids, i.e. gases, and that have internal flow passages 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), or components that have a cracking pressure such as non-return (check) valves and quick-exhaust valves. In addition, it does not apply to components that exchange energy with the fluid during flow-rate measurement, e.g. cylinders, accumulators, etc.
NOTE This part of ISO 6358 does not provide a method to determine if a component has hysteretic behaviour; ISO 6358-1 does provide such a method,
Table 1 provides a summary of which parts of ISO 6358 can be applied to various components.
Evaluation of measurement uncertainties is described in Annex A. Requirements for a method to test the volume of an isothermal tank are given in Annex B. Guidance on the isothermal tank is given in Annex C. Requirements for a method to test isothermal performance are given in Annex D. Guidance on the equation for calculating characteristics is given in Annex E. Guidance on calculating flow-rate characteristics is given in Annc.f.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 12 19-1, Fluid power systems and components — Graphical symbols and circuit diagrams — Part 1:
Graphical symbols for conventional use and data-processing applications
ISO 5598, Fluid power systems and components — Vocabulary
ISO 6358-1, Pneumatic fluid power — Determination of flow-rate characteristics of components using
compressible fluids — Part 1: General rules and test methods for steady-state flow
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 5598 and ISO 6358-1 apply.
4 Symbols and units
4.1 The symbols and units shall be in accordance with ISO 6358-1 and Table 2.ISO 6358-2 pdf free download.
Tags: neumatic fluid power
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