Ball valve and flow control solutions for hydrogen (H2) applications

Ball valves for H₂ production

This application includes systems e.g. for electrolysis or power-to-gas systems. Of course, ball valves from MHA ZENTGRAF can also be used at these lower pressure applications.

Larger nominal widths of up to 4“ can also be offered to ensure maximum flow capacity. A leakage rate A according to DIN EN 12266 is guaranteed even at larger nominal diameters.

Our valves are available with either threaded or flange connection according your specification. On request accessories like limit switches, locking devices or fully automated valves are available.

Features

• Sizes: up to DN100 (4“) full flow
• Connections: threaded, flanged
• Manual or automatic actuation

Ball valve series HFKH500 for hydrogen transport, storage and refueling systems up to 500 bar

Gas transport and refueling applications set higher requirements for ball valves. At 350 bar refueling, system pressures Gas transport and refueling applications set higher requirements for ball valves. At 350 bar refueling, system pressures up to 500 bar occur during compression and storage. Considering the temperature influence, a Type 3 Technology Cylinder for example is designed for system pressures of approximately 480 bar.

During transport, vibrations and weather influences can put heavy strain on the system equipment. Additionally, valves for such kind of applications are actuated more frequently because filling and drain processes are carried out regularly.

For use as a maintenance valve, with occasional operations, we recommend our proven ball valves with gas seat system using hydrogen-compatible materials.

For ball valves with higher operation frequencies up to 500 bar, we offer our new HFKH500. Our ball valves are designed for switching under full differential pressure. On request, our ball valves can be supplied as a complete unit with assembled and tested actuator.
These ball valves already meet the endurance requirements of the new ISO 23826, are ATEX IIC 2G compliant and certified according to DIN EN ISO 15484-1 (low emission).

H₂ ball valve series HFKH500 features

• Sizes: DN8 (3/8“), DN13 (1/2“), DN25 (1“)
• Pressure rating: 500 bar
• Connections: threaded, flanged
• Tested according TPED guideline (ISO 23826)
• Low emission DIN EN ISO 15848-1 certified
• ATEX 2014/34/EU - Category IIC 3G compliant
• Rapid gas decompression proven o-rings
• Materials according ISO11114

HFKH500 Datasheet (PDF)

Ball valve series HFKH650 for hydrogen transport, storage and refueling systems up to 650 bar

Higher compression of hydrogen during transport and storage improves the efficiency of the systems, saves installation space and, last but not least, reduces costs. Considering the temperature influence, State of the Art Type 4 Technology Cylinders are designed for pressures up to 650 bar.

With the new HFKH650 hydrogen ball valve, MHA offers a reliable solution for this kind of application. Additionally, it has a torque-optimized design so it can be conveniently switched by hand even at full differential pressure.

The new ball valve series already meets the endurance requirements of the new ISO 23826 standard. In addition our ball valve is certified to the following standards: TPED DIN EN ISO 23826, ATEX IIC (H2) Ex-zone 1, 2G, Fire-safe DIN EN ISO 10497 and DIN EN ISO 15848-1.

H₂ ball valve series HFKH650 features

• Sizes: DN8 (3/8“), DN13 (1/2“), DN25 (1“)
• Pressure rating: 650 bar
• Connections: threaded, flanged
• Tested according TPED guideline (ISO 23826)
• Low emission DIN EN ISO 15848-1 certified
• ATEX 2014/34/EU - Category IIC 2G, 3G compliant
• Fire-safe according to DIN EN ISO 10497
• Rapid gas decompression proven o-rings
• Materials according ISO11114

HFKH650 Datasheet (PDF)

Ball valve series HFKH1000 for hydrogen refueling at pressures up to 1034 bar

At 700 bar refueling of passenger cars, hydrogen is compressed and stored at pressures up to 1034 bar. Latest developments reveal a tendency to 700 bar technology also for commercial vehicles such as trucks and busses.

ISO 19880-3 Standard (Gaseous Hydrogen – Refueling Stations – Part 3: Valves) differs between valves for maintenance (Class B) and operation (Class A) purpose. While Class B Valves are only meant to withstand 100 cycles of operation at room temperature, Class A Valves shall withstand 102000 cycles (100000 at RT, 1000 at -40 °C and another 1000 at +85 °C) without losing integrity of the seal system. MHA aims to qualify its HFKH1000 hydrogen ball valve acc. to ISO 19880-3, Class A. Additionally, the shaft sealing design is certified according to DIN EN ISO 15848-1 (low emission).

To enable up to 102000 actuations under full differential pressure, the HFKH1000 trunnion valve was designed with special attention to reduced wear and friction. This ensures a maximal level of reliability and sustainability even under harshest conditions. This ball valve can be used for ATEX-relevant applications as it is approved for ATEX IIC (H2) Ex-zone 1, 2G.

H₂ ball valve series HFKH1000 features

• Sizes: DN8 (3/8“), DN13 (1/2“)
• Pressure rating: 1034 bar
• Connections: threaded, flanged
• Tested according TPED guideline (ISO 23826)
• Low emission DIN EN ISO 15848-1 certified
• ATEX 2014/34/EU - Category IIC 3G compliant
• Rapid gas decompression proven o-rings
• Materials according ISO11114

HFKH1000 Datasheet (PDF)

DSB valves are crucial for safe and efficient hydrogen applications, particularly at hydrogen refueling stations. They reliably isolate pressure systems and safely release residual pressure to minimize potential hazards. With two block valves, they prevent uncontrolled hydrogen leakage while allowing maintenance of specific areas without interrupting the operation of the entire system.

The DSB valves by MHA Zentgraf utilize the same sealing concept on the actuating shaft and fittings as the HFHK valves. This design makes them suitable for high cycling operations and compliant with the lifetime requirements according to ISO 23826. Additionally, they are ATEX certified and comply with the low emission standard DIN EN ISO 15848-1.

For the bleed connection, we offer a variety of options for different internal thread connections or even the possibility of a directly integrated needle valve. This allows you to tailor the DSB valve from MHA Zentgraf to your specific requirements and use it flexibly in your hydrogen applications.

Features of the DSB-HFKH Series

• Sizes: DN8 (3/8"), DN13 (1/2"), DN25 (1")
• Pressure ratings: 650 bar, 1000 bar
• Connections: Threaded, Flanged
• Compliance with TPED Directive (ISO 23826)
• AED tested O-rings Materials according to ISO 11114
• Low Emission DIN EN ISO 15848-1 certified
• ATEX 2014/34/EU – Category IIC 2G, 3G compliant

DSB HFKH650 and HFKH1000 Datasheet (PDF)

Check valve series RVH2 for hydrogen transport, storage and refueling systems up to 1034 bar

Hydrogen transport, storage and refueling applications set high requirements for check valves.
At 700 bar refueling of passenger cars, hydrogen is compressed and stored at pressures up to 1000 bar and temperatures as low as -40°C. Latest developments reveal a tendency to 700 bar technology also for commercial vehicles such as trucks and busses.

The check valve RVH2 is specifically designed to fulfil all requirements for hydrogen applications. We offer different cracking pressures to customize the best possible product for your application.

The new check valve series already meets the endurance requirements of the new ISO 23826 and ATEX IIC (H2), Ex-zone 1, 2G.

H₂ check valve series RVH features

• Sizes: DN8 (3/8“), DN13 (1/2“)
• Pressure rating: 1034 bar
• Connections: threaded, flanged
• Tested according TPED guideline (ISO 23826)
• Materials according ISO11114

RVH2 Datasheet (PDF)