ISO/TC 131/SC 5/WG 5 - Treatment of air

This document specifies two methods of measuring the level of acoustic pressure at the outlet of an exhaust silencer: — the first method, called "steady-state mode", is intended to evaluate the noise level under steady state flow, i.e. constant upstream pressure (steady-state test according to ISO 6358‑1); and — the second method, called "discharge", is intended to measure the noise level during the decrease of the pneumatic pressure (discharge test according to ISO 6358‑2). This document is applicable to pneumatic exhaust silencers and devices designed to reduce the sound produced by discharges of compressed air, entering in the scope of application of ISO 6358‑1 and ISO 6358‑2.

This document specifies tests, procedures and a method of presenting the results concerning the parameters that define the main characteristics to be included in the supplier's literature of lubricators conforming to ISO 6301‑1. This document can be applied: — to facilitate the comparison of lubricators by standardizing test methods and presentation of test data; — to assist in the proper application of lubricators in compressed-air systems. The tests specified are intended to allow comparison between the different types of lubricators; they are not production tests to be carried out on each lubricator manufactured.

ISO 5782-1:2017 specifies which characteristics of compressed air filters are to be included in the supplier's literature. It also specifies product-marking requirements. ISO 5782-1:2017 is applicable to compressed air filters, constructed from light alloys (aluminium, etc.), zinc diecast alloys, brass, steel and plastic, with a rated pressure of up to 1 600 kPa (16 bar) and a maximum temperature of 80 °C, designed to remove solid and liquid contaminants from compressed air by mechanical means

ISO 6301-1 specifies which characteristics of compressed-air lubricators are to be included in the supplier's literature. It also specifies product-marking requirements for lubricators. ISO 6301-1 is applicable to compressed-air lubricators constructed from light alloys (e.g. aluminium), zinc die-cast alloys, brass, steel and plastic, with a maximum rated pressure of 1 600 kPa (16 bar ) or less and a maximum rated temperature of 80 °C or less.

ISO 6953-1:2015 applies to - manually controlled direct operated types (with or without relieving mechanism), - manually controlled internal pilot operating types (e.g. nozzle flapper), and - external pilot operated types. In addition, it specifies the product marking requirements for pressure regulators and filter-regulators. This part of ISO 6953 is applicable to compressed air pressure regulators with a rated inlet pressure of up to 2 500 kPa (25 bar) and an outlet adjustment pressure of up to 1 600 kPa (16 bar); and to filter-regulators with rated inlet and outlet pressures of up to 1 600 kPa (16 bar), in which the major contaminants are removed by mechanical means. NOTE 1 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2. The rated pressure should be selected from the preferred pressures listed in ISO 2944. NOTE 2 The main characteristics to be included in the supplier's literature related to electrically modulated pneumatic continuous pressure control valves are specified in ISO 10094‑1.

ISO 6953-2:2015 specifies test procedures and a method of presenting the results concerning the parameters which define the main characteristics to be included in literature from suppliers of regulators and filter-regulators conforming to ISO 6953‑1. The purpose of this part of ISO 6953 is the following: - to facilitate the comparison of pressure regulators and filter-regulators by standardizing test methods and presentation of test data; - to 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 type of regulators and filter-regulators; they are not production tests to be carried out on each pressure regulator or filter-regulator manufactured. NOTE 1 The tests related to electro-pneumatic pressure control valves are specified in ISO 10094−2. NOTE 2 Use ISO 6953‑3 for 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.

ISO 6301-1:2009 specifies which characteristics of compressed-air lubricators are to be included in the supplier's literature. ISO 6301-1:2009 also specifies product-marking requirements for lubricators.

This part of ISO 6301:2006 specifies tests, procedures and a method of presenting the results concerning the parameters that define the main characteristics to be included in the supplier's literature of lubricators conforming to ISO 6301-1. This part of ISO 6301:2006 can be applied to facilitate the comparison of lubricators by standardizing test methods and presentation of test data; to assist in the proper application of lubricators in compressed air systems. The tests specified are intended to allow comparison between the different types of lubricators; they are not production tests to be carried out on each lubricator manufactured.