Monthly Roundup: Fluid Systems and Components Standards from May 2025 (Part 1)

Looking back at May 2025, the fluid systems and components for general use sector experienced a productive month of standardization. Five significant standards were released, covering areas from hydraulic power efficiency and component testing methodologies to rigorous safety requirements for gas controls and storage. This retrospective monthly overview is crafted for professionals who want not just a list of what was published, but insightful context, analysis, and actionable information on these standards – streamlining your path to compliance and operational excellence.

Monthly Overview: May 2025

May 2025 marked a period of substantive progress in the advancement of standards for fluid systems and components for general use. The sector saw a blend of updates and new publications addressing critical technical domains:

• Hydraulic systems' energy performance – reflecting industry demand for sustainable, low-consumption equipment
• Testing protocols for pressure ripple in hydraulic motors – vital for system reliability and operational noise reduction
• Enhanced safety and control in gas-burning appliances – in line with tightening requirements across Europe
• Updated definitions for actuators and pressure vessels – responding to advances in technology and materials

Compared to typical publication patterns, May showed a clear emphasis on harmonizing safety requirements, optimizing energy usage, and bridging the gap between evolving technologies (like hydrogen energy storage) and existing safety frameworks. These publications signal industry focus on environmental sustainability, reliability, and rigorous conformity assessment – key trends steering this sector’s future.

Standards Published This Month

ISO 10767-3:2025 – Determination of Pressure Ripple Levels in Hydraulic Motors

Hydraulic fluid power – Determination of pressure ripple levels generated in systems and components – Part 3: Method for motors

ISO 10767-3:2025 presents a unified approach for evaluating pressure ripple characteristics generated by positive-displacement hydraulic motors. This standard outlines procedures for determining source flow ripple, source impedance, and pressure ripple within a frequency range of 50 Hz to 3,500 Hz, focusing on the motor’s inlet port. It applies to all types and sizes of positive-displacement motors operating under steady-state conditions.

The methodology employs detailed test rig specifications, control of motor rotational speed, inlet port connections, and precise calibration of instrumentation. By standardizing the evaluation of ripple-induced vibrations and pressure fluctuations, this document supports the design and integration of quieter, more energy-efficient hydraulic systems.

Industries relying heavily on hydraulic fluid power equipment – such as manufacturing, construction machinery, and process automation – will benefit from the repeatable assessment and improved benchmarking enabled by this standard. Suppliers and systems integrators can use the findings to specify motors with reduced noise and improved performance.

Key highlights:

• Defines methodology for measurement of pressure ripple in positive-displacement hydraulic motors
• Applies for operation under steady-state conditions across a broad frequency bandwidth
• Enhances reliability and benchmarking during system design and component selection

Access the full standard:View ISO 10767-3:2025 on iTeh Standards

EN 126:2025 – Multifunctional Controls for Gas Burners and Appliances

Safety and control devices for burners and appliances burning gaseous fuels – Multifunctional controls

EN 126:2025 sets out comprehensive requirements for the safety, design, construction, and performance of multifunctional controls (MFCs) in burners and appliances burning gaseous fuels. This revision updates previous editions, aligning with the horizontal framework of EN 13611:2019 and refining the interplay between electrical and mechanical control elements.

Notably, the standard is applicable to MFCs incorporating at least one mechanical control, with connection sizes up to DN 150 and inlet pressures up to 50 kPa. Certain exclusively electronic controls are expressly excluded, clarifying the range of products subject to its provisions. The standard covers the critical interactions between component functions, considers diverse operating conditions (including DC supply), and outlines robust requirements for leak tightness, fault tolerance, marking, and EMC.

EN 126:2025 is pertinent to manufacturers and users of gas appliances across residential, commercial, and industrial domains. With its inclusion of new test procedures and cross-referencing to the wider safety family (including SIL/PL and European directives), the document strengthens conformity with regulations such as the EU Gas Appliances Regulation and Pressure Equipment Directive.

Key highlights:

• Updated to align with EN 13611:2019, clarifying relationships among control standards
• Applies to MFCs with mechanical control elements for appliances burning various gaseous fuels
• Introduces revised test methods, enhanced safety integrity (SIL/PL), and expanded marking requirements

Access the full standard:View EN 126:2025 on iTeh Standards

EN 15714-4:2025 – Hydraulic Part-Turn Actuators for Industrial Valves

Industrial valves – Actuators – Part 4: Hydraulic part-turn actuators for industrial valves – Basic requirements

EN 15714-4:2025 defines the foundational technical and functional requirements for hydraulic actuators performing part-turn motion on industrial valves. This latest edition brings the structure and endurance expectations into harmony with contemporary editions of related actuator standards, reflecting expanded endurance test values and new marking protocols.

Applicable to both double acting and single acting actuators (excluding those integral to control valves or designed for permanent immersion/electro-hydraulic actuation), the document establishes parameters for actuator duty cycles (on-off/modulating), enclosure protection, corrosion resistance, control features, and production quality requirements. Comprehensive guidance is also given for type testing, marking, and documentation, making it easier for users to select, specify, and maintain reliable valve actuation systems.

This standard is indispensable for manufacturers, operators, engineering firms, and procurement specialists seeking to ensure that valve actuators perform safely and reliably in varied industrial contexts, from water treatment to petrochemicals.

Key highlights:

• Introduces wider endurance value ranges and updated endurance testing
• Harmonizes structure and terminology with the latest standards series
• Stresses enclosure, corrosion protection, and conformity assessment practices

Access the full standard:View EN 15714-4:2025 on iTeh Standards

EN 17533:2025 – Stationary Storage of Gaseous Hydrogen

Gaseous hydrogen – Cylinders and tubes for stationary storage

EN 17533:2025 addresses the design, construction, and testing of cylinders, tubes, and pressure vessels used for the stationary storage of gaseous hydrogen. Covering water capacities up to 10,000 L and pressures up to 1,100 bar, the standard applies to both seamless metallic (Type 1) and composite (Types 2, 3, 4) vessels, while excluding vessels for solid, liquid, or hybrid storage and certain welded designs.

The document stipulates material selection, stress and fatigue analysis, pressure cycling, fire testing, hydrogen compatibility, and labelling. It also sets out requirements for production quality control, initial and periodic testing, and documentation. Special attention is paid to hydrogen embrittlement, UV and humidity resistance, and safety under thermal and mechanical impact.

Companies involved in hydrogen storage infrastructure – including energy sector players, gas utilities, and EPC contractors – will find the standard critical for designing safe, efficient, and future-proof hydrogen storage solutions. Conformance supports regulatory compliance and public confidence for hydrogen-powered energy transition projects.

Key highlights:

• Comprehensive requirements for metallic and composite vessels up to 10,000 L/1,100 bar
• Rigorous provisions for material compatibility, fatigue, and hydrogen-specific hazards
• Integrated fire, impact, and pressure cycling testing to ensure operational safety

Access the full standard:View EN 17533:2025 on iTeh Standards

ISO 18464:2025 – Energy Efficient Hydraulic System Design

Hydraulic fluid power – Design methodology for energy efficient systems

Reflecting the increasing demand for eco-efficient industrial systems, ISO 18464:2025 establishes a holistic methodology for the design of hydraulic systems optimized for minimal energy consumption. The standard encompasses the entire life cycle of system design, from actuator dimensioning, control strategy, and power supply, to pipework selection and auxiliary component integration.

The methodology takes application duty cycles into account and prescribes a comprehensive process for calculating required energy supply, rating consumption, and benchmarking alternative designs. Emphasis is given to accurate energy flow analysis, hydraulic accumulator management, and the selection of fluids and piping for optimal efficiency.

This standard is relevant for system designers, plant engineers, OEMs, and operators committed to improving machine performance while reducing environmental impact. It builds a strong bridge between technical hydraulic specification and sustainability objectives, aligning with regulatory incentives for energy-efficient equipment.

Key highlights:

• Framework for low-energy-consumption hydraulic system design
• Integrates actuator specification, power supply choices, and piping strategies
• Supports life cycle assessment and benchmarking against best-energy-usage criteria

Access the full standard:View ISO 18464:2025 on iTeh Standards

Common Themes and Industry Trends

May 2025’s standards publications highlight several broader trends shaping the fluid systems and components sector:

• Sustainability and energy efficiency: Both ISO 18464:2025 and ISO 10767-3:2025 place energy performance and system optimization at center stage—key for enterprises aiming to lower operational costs and reduce environmental impact.
• Safety and reliability: EN 126:2025 and EN 17533:2025 represent a continued tightening of safety and performance requirements, especially for systems operating with hazardous gases or high pressures.
• Technological integration: EN 15714-4:2025 and EN 126:2025 reflect the growing complexity of integrated control systems and high-specification actuators, necessitating careful selection and validation processes.
• Support for hydrogen energy: EN 17533:2025’s focus on hydrogen storage dovetails with global trends toward decarbonization and alternative fuel adoption.

Notably, there’s clear momentum toward harmonizing terminologies, test procedures, and interoperability—a response to both regulatory demands and global supply chain complexity.

Compliance and Implementation Considerations

For organizations affected by these new and revised standards, practical steps include:

• Gap analysis: Map current product or system designs against the requirements and test procedures of each relevant standard.
• Prioritize energy efficiency: Leverage the methodology in ISO 18464:2025 to benchmark system designs and plan improvements aligned with sustainability objectives.
• Update design and procurement specifications: Modify internal specs and supplier requirements to reference the latest versions, particularly for actuators, gas controls, and hydrogen storage elements.
• Implement new safety protocols: For manufacturers and users of gas-burning equipment, incorporate EN 126:2025’s expanded controls into risk assessments and compliance documentation.
• Training and documentation: Ensure engineering, QA, and maintenance teams are trained on new test procedures, marking requirements, and conformity documentation as outlined by each standard.
• Compliance timelines: Coordinate with notified bodies or local regulators to clarify transition dates for these standards to become mandatory within your jurisdiction.

Resources to facilitate implementation, including official standards documents and expert guidance, can be found through iTeh Standards.

Conclusion: Key Takeaways from May 2025

May 2025’s publications in the fluid systems and components for general use sector reinforce the industry's commitments to safety, energy efficiency, and technical rigor. The most impactful standards—ISO 18464:2025 for energy-efficient hydraulic design, EN 17533:2025 for safe hydrogen storage, and EN 126:2025 for advanced gas control safety—directly address evolving regulatory and market needs.

Professionals are urged to:

• Review each standard’s specific requirements against your organization’s operations or supply chain
• Prioritize updates to specifications, training, and documentation to ensure timely compliance
• Stay abreast of emerging trends—especially those concerning sustainability and system reliability

Remaining current with these publications is not only crucial for regulatory conformity, but also key to capturing operational efficiencies, fostering innovation, and positioning your business as a leader in the rapidly evolving fluid systems landscape.

For full access to these and other standards, visit iTeh Standards for the latest authoritative resources.