ISO 10094-2:2021

Overview

ISO 10094-2:2021 is an international standard in the pneumatic fluid power series that specifies test methods and a standardized presentation of results for electro‑pneumatic continuous pressure control valves. It defines the procedures to determine the main characteristics that manufacturers should include in the supplier’s literature for valves that conform to ISO 10094-1. The tests are intended to facilitate comparison between valve types and to assist correct application in compressed air systems. These tests apply to components with an exhaust port vented to atmosphere and are not intended as routine production inspections.

Key topics and requirements

• Scope and test conditions: Requirements for gas supply, temperature, inlet and test pressures, and electrical supply conditions to ensure repeatable measurements.
• Static characteristics:
  • Control signal vs. pressure at null forward or relief flow
  • Flow-rate vs. pressure characteristics (forward and relief)
  • Leakage at null flow
  • Pressure regulation behaviour under specified loads
• Dynamic characteristics:
  • Step response tests (charge/discharge) to determine response time, settling time and shifting time
  • Frequency response (informative annex) and procedures for gain/phase calculation
• Performance metrics and calculations:
  • Characteristic curves, hysteresis, linearity, resolution, repeatability, sensitivity, offset, and sonic conductance
• Test installation and circuits: Standardized test circuits and measurement points for pressure, flow and electrical inputs to ensure comparable data.
• Presentation of results: Prescribed formats and curves for inclusion in supplier’s literature to allow direct comparison by specifiers and purchasers.

Applications and users

ISO 10094-2:2021 is most useful for:

• Valve manufacturers preparing technical datasheets and supplier literature
• Independent test laboratories performing compliance and comparative testing
• System designers and pneumatic engineers selecting electro‑pneumatic pressure control valves
• Procurement and specification writers who require standardized performance data
• Quality and R&D teams validating valve performance and dynamic behaviour

Practical benefits include clearer product comparisons, improved selection for pressure tracking and regulation tasks, and better integration of valves into compressed air and pneumatic control systems.

Related standards

• ISO 10094-1 - product definitions and basic requirements for electro‑pneumatic pressure control valves (conformance reference)
• ISO 6953-2 - tests for non‑electrically modulated pneumatic continuous pressure control valves
• ISO 10041-2 - tests for electro‑pneumatic continuous flow control valves
• ISO 6953-3 - alternate dynamic test method (isothermal tank) - measures specific hysteresis behaviour

Keywords: ISO 10094-2:2021, electro‑pneumatic pressure control valves, pneumatic fluid power, test methods, supplier’s literature, static characteristics, dynamic response, leakage, hysteresis.