ISO 6953-2:2024

Overview

ISO 6953-2:2024 - "Pneumatic fluid power - Compressed air pressure regulators and filter-regulators - Part 2" specifies standardized test methods and a presentation format for the main characteristics that suppliers must include in product literature for pressure regulators and filter-regulators (conforming to ISO 6953-1). Its aim is to enable direct comparison of device performance and to assist correct application of compressed air pressure regulators in pneumatic systems.

Key topics and technical requirements

The standard defines test procedures, conditions and calculation methods for parameters that typically appear in supplier datasheets. Major technical topics include:

• Test conditions: gas supply, temperature, pressures and inlet/test (regulated) pressure setup.
• Flow characteristics tests:
  • Test installation and general requirements for measuring flow-rate vs regulated pressure.
  • Procedures for forward flow rate-pressure and relief flow rate-pressure characteristics.
  • Calculation of flow rate-pressure curves, hysteresis and maximum (sonic) conductance for forward and relief flow.
• Pressure regulation test: verified using defined test circuits and procedures.
• Pilot-operated regulator tests: maximum air consumption at null forward/relief flow for regulators with air bleed.
• Special tests:
  • Pilot pressure vs regulated pressure for external pilot-operated regulators.
  • Output resolution for manual and pressure-pilot regulators.
  • Sensitivity and repeatability tests (including detailed repeatability procedures for manual and pilot regulators).
• Presentation of data: standardized formats for flow and pressure regulation characteristics, air consumption and additional attributes to include in supplier literature.

Note: ISO 6953-3 is referenced as an alternative dynamic test method (isothermal tank) for certain flow-rate characteristics but measures only the decreasing portion of hysteresis. Electro-pneumatic valve tests are covered under ISO 10094‑2.

Applications and who uses it

ISO 6953-2:2024 is intended for:

• Manufacturers and suppliers preparing product datasheets and performance literature for pressure regulators and filter-regulators.
• Test laboratories and QA teams implementing standardized test procedures for comparative data.
• System designers, OEMs and specification writers selecting regulators for industrial compressed air systems.
• Maintenance and reliability engineers evaluating replacement components and system behavior under varying flow and pressure conditions.

Using this standard helps ensure consistent, comparable performance data for better component selection and system design.

Related standards

• ISO 6953-1 (product requirements for regulators/filter-regulators)
• ISO 6953-3 (alternative dynamic flow-rate test method)
• ISO 10094‑2 (electro‑pneumatic pressure control valve tests)
• Normative references cited: ISO 3448, ISO 5598, ISO 6358-1

Keywords: ISO 6953-2:2024, pneumatic fluid power, compressed air pressure regulators, filter-regulators, test methods, flow characteristics, pressure regulation, supplier literature.