ISO 6953-2:2024 空気圧流体力 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 5, Control products and components.

This third edition cancels and replaces the second edition (ISO 6953-2:2015), which has been technically revised.

The main changes are as follows:

• addition of new paragraph for an additional test for relief flow rate (7.3.3);
• addition of new paragraph for a test for resolution in case of pressure-pilot air pressure regulator (10.3);
• addition of new detailed test procedure for repeatability test for manual air-pressure regulator and pilot pressure air-pressure regulator (10.5);
• addition of measure of the sensitivity.

A list of all parts in the ISO 6953 series can be found on the ISO website.

Introduction

In pneumatic fluid power systems, power is transmitted and controlled through a gas under pressure within a circuit.

When pressure reduction or pressure regulation is required, regulators and filter-regulators are components designed to maintain the pressure of the gas at an approximately constant level.

It is therefore necessary to know the performance characteristics of these components in order to determine their suitability in an application.

1 Scope

This document specifies test procedures and a method of presenting the results concerning the parameters which define the main characteristics to be included in the literature from suppliers of regulators and filter-regulators conforming to ISO 6953-1.

The purpose of this document is to:

• facilitate the comparison of pressure regulators and filter-regulators by standardizing test methods and presentation of test data;
• assist in the proper application of pressure regulators and filter-regulators in compressed air systems.

The tests specified are intended to allow comparison among the different types of regulators and filter-regulators; they are not production tests to be carried out on each pressure regulator or filter-regulator manufactured.

ISO 6953-3 can be used as an alternative dynamic test method for flow-rate characteristics using an isothermal tank instead of a flow meter. However, this method measures only the decreasing flow rate part of the hysteresis curve of forward flow and relief flow characteristics.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 5598, ISO 6358-1, ISO 6953-1 and ISO 10094-1 apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography