HYDRAULICS 22 HYDRAULICS & PNEUMATICS January/February 2025 www.hpmag.co.uk Bürkert, a specialist in fluid and gas flow control, has introduced a new series of valves designed to manage ultra-highpressure hydrogen flow for use in hydrogen infrastructure. The range includes both solenoid and process valves, capable of controlling hydrogen up to 1,000 bar. These valves are suitable for applications such as grid infrastructure and vehicle refuelling stations. They are engineered for longevity and meet the necessary safety standards required for hydrogen systems. These valves are intended for highpressure hydrogen applications, particularly in the stages of compression, storage, and transportation. The product range is particularly relevant for systems downstream of hydrogen production via electrolysis, where the gas must be compressed for storage or transportation. The valves are also designed to support the hydrogen supply for vehicle refuelling stations. The solenoid valve range includes options for on/off control, comprising a direct acting valve and two servo-assisted valves. The Type 6080 direct acting valve can operate without the assistance of the media passing through it, functioning from 0 Barg and managing pressures up to 900 bar. It is available with orifice diameters of 0.5 mm or 0.7 mm. The Type 6480 and Type 6481 servoassisted valves use a pressure differential across the valve to facilitate opening and closing. The Type 6480 requires a 5-bar pressure differential, while the Type 6481 needs a 1-bar pressure differential. The Type 6480 can handle hydrogen flows up to 1000 bar and comes with an 8 mm orifice, while the Type 6481 can manage pressures up to 450 bar and offers orifice diameters ranging from 12 mm to 50 mm. The valves are designed to enhance operational efficiency, with special coatings on the wetted components to increase service life by reducing wear. This feature enables the valves to achieve higher switching cycles and extended maintenance intervals. In addition to solenoid valves, Bürkert’s range for ultra-high-pressure hydrogen applications also includes pneumatically operated process valves, such as the Type 2111 and Type 2121, which are also used for on/off control. The Type 2121 is available with orifice diameters ranging from 12 mm to 50 mm and can manage hydrogen pressures up to 600 bar. The Type 2111 offers orifice diameters of 4 mm and 8 mm and is suitable for hydrogen pressures up to 1000 bar. These process valves feature dynamic sealing rings on the spindles, which ensure high tightness for dynamic sealing. The robust one-piece design of the valves reduces wear, while the stainless-steel construction offers high resistance to hydrogen embrittlement. The valves are further reinforced with additional finishing on pressure-bearing, moving parts. All valves in this range undergo rigorous testing to meet safety standards. They are designed to withstand pressures up to twice their rated capacity, and each valve is tested at one-and-a-half times its working pressure during production. To ensure leak-tightness, valves are tested to 5 x 10^-5 mbar l/s during production. The materials used, including 316Ti stainless steel, are selected for their resistance to hydrogen embrittlement. The valves meet the relevant safety standards, including ISO 19880-3 for gaseous hydrogen fuelling stations, which covers requirements and test methods for high-pressure gas valves used in hydrogen stations up to the H70 classification. Additionally, the valves comply with the Pressure Equipment Directive 2014/68/EU and are certified for use in hazardous areas, meeting ATEX Zone 1 IECEx Cat. II standards. For further information please visit: http://www.burkert.co.uk HARNESSING HOSE || SECURING SAFETY • Nylon burst sleeve – MSHA approved with high abrasion resistance • Twisterflex – impact & abrasion resistant HDPE spiral guard • Fire sleeve – protec琀on from extreme heat & molten metal spla琀er SAVE Our environment, resources & protect your hose assemblies! +44 (0)1202 478334 uk@polyhose.com www.polyhose.com New valves for ultra-high- pressure hydrogen systems H&P looks at a new range of valves designed for ultra-high-pressure hydrogen applications, highlighting advanced solutions for fluid control in infrastructure and vehicle refuelling systems. With a focus on highpressure performance, durability, and safety, these valves offer key insights into the evolving technologies used in modern valve systems, relevant to the broader hydraulics industry.
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