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coaxial valves MK / FK direct acting
- In the case of the lateral high-pressure valves, the valve drive is arranged on the side.
- They are used wherever high pressures of up to 500 bar have to be controlled at high flow rates.
- The high-pressure valves are available with either a magnetic or a pneumatic drive.
- Among other things, the valves are used in the refueling process or in high-pressure test stands.
coaxial valves MK / FK direct acting
-
Compact and robust design:
Thanks to the flow-optimized, concentric arrangement of the actuator and media flow, coaxial valves are particularly space-saving and mechanically durable. They are ideal for demanding environments where reliability and longevity are essential – such as in mobile or stationary hydrogen systems. -
H₂-compatible materials and high media resistance:
These valves are specifically designed for the safe handling of hydrogen, as well as aggressive, reactive, or ultra-pure media. They offer excellent chemical resistance and meet the strict requirements for tightness and material selection demanded by hydrogen applications. -
Reliable operation under high pressure:
In hydrogen storage, testing, and refueling systems, high pressures are standard. Coaxial valves are developed to perform reliably under these conditions, featuring high pressure resistance and consistent switching performance. -
Wide range of designs and flexible customization:
Whether 2/2-way or 3/2-way, direct-acting or pilot-operated – the broad variety of configurations enables optimal adaptation to diverse technical needs. This flexibility allows for tailor-made solutions across the hydrogen industry.
Key features
- Mechanical line connection: threaded socket G 3/8 - G 3/4
- Flanges PN 16/40/100
- Nominal width: DN 15 mm
- Kv value: 2.5 - 6.0 m³/h
- Pressure range: 0-100 bar
- Temperature range: -20 to +100 °C
- Degree of protection: IP65
Applications
- Hydrogen production – control of high-pressure gas flows in electrolysers and reformer systems
- Hydrogen storage – regulation of pressure in high-pressure storage tanks and tank systems
- Hydrogen refueling – Use in filling stations for precise pressure control when refueling fuel cell vehicles
- Fuel cell systems – Control of hydrogen flow for efficient energy conversion
- Transportation and distribution – High pressure control in pipelines and mobile hydrogen transport containers
- Safety and shut-off systems – Use in emergency shutdown and pressure relief systems to increase operational safety
- Industrial hydrogen utilization – integration into high-pressure processes in refineries, steelworks and chemical production plants
Contact
- With 65 years of experience in the development, production and worldwide distribution of valves, müller co-ax gmbh is the right partner for you. Interested? Please contact us using the sales form.
| Brand | coax |
| Type of Tank | |
| Max Pressure (in bar) | 100 |
| Min Pressure (in bar) | |
| Nom Pressure (in bar) | |
| Nom. Tank Pressure (in bar) | |
| Max Mass Flow (in g/s) | |
| Flow Configuration | |
| Max Power (in kW) | |
| Max Input Voltage (in V) | |
| Connector Threading | |
| Ingress Protection Rating | IP65 |
| Manufacturing Readiness (MRL) | |
| Technology Readiness (TRL) | |
| Compliant with | |
| Max Ambient Temperature (in °C) | 80 |
| Min Ambient Temperature (in °C) | -20 |
| Max Medium Temperature (in °C) | 100 |
| Min Medium Temperature (in °C) | -20 |
müller co-ax gmbh
coax® – Valve Technology that Drives the Hydrogen Future
müller co-ax gmbh delivers cutting-edge valve solutions for every stage of the hydrogen value chain – from production to application:
- Hydrogen production / electrolysis
- Storage
- Transport
- Refueling
- Test benches
Our coax® valves are specifically engineered for hydrogen-based systems. They combine a compact design, high flow rates, wide pressure ranges, and the use of hydrogen-resistant materials – making them ideal for installation in tight or space-constrained environments.
With integrated limit switches, valve positions (open/closed) can be directly and reliably detected – a critical feature for automated systems and safety-relevant applications.
A standout feature: The magnetically operated coax® valves are uniquely designed to remain leak-tight to the atmosphere even if the seals begin to wear. In other words, there is no operational connection to the external environment – ensuring zero hazardous leakage, no skin contact with media, and maximum operational safety.
These closed valve assemblies are the perfect choice for demanding media such as gaseous hydrogen, liquid ammonia, or methanol – and are ideally suited for use in explosive environments.
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