müller coax group
solutions for hydrogen applications

co-ax on the job
solutions for hydrogen applications

In order to achieve greenhouse gas neutrality, hydrogen is an important alternative to fossil fuels. Besides applications in industry, green hydrogen plays a major role in the decarbonization of the energy sector or in mobility. coax® valve technology has proven itself in the whole hydrogen value chain: from hydrogen production to consumption. When developing new technologies, we work very closely with our customers and face current and future challenges.

Our solution for your challenges

Hydrogen can diffuse through metals, which is why they lose their strength. This process – referred to as hydrogen embrittlement – can be prevented by using suitable materials, such as austenitic steels (316 or 316L).

  • coax® offers the use of hydrogen-resistant materials
  • coax® offers a careful selection of materials, especially of the media wetted parts
  • coax® offers durable and reliable valve technology

When combined with oxygen, hydrogen can form an ignitable mixture. In order to ensure safety, especially in enclosed spaces, the tightness of installed components is of key significance.

  • coax® offers 100% tightness to the outside and at the valve seat thanks to coaxial valve technology
  • coax® offers an additional vacuum test which ensures tightness
  • coax® offers 100% testing of all valves supplied by coax and guarantees unique quality

Having a low energy density in relation to its volume, hydrogen is compressed for storage and for the refueling process. The initial pressure of the hydrogen is constantly increased, which is why pressures of various intensity have to be controlled.

  • coax® offers a pressure-balanced design which allows valve switching from 0 bar
  • coax® offers valve tightness, even when back pressures are applied
  • coax® offers a bi-directional flow in the valve which enables medium return
Advantages
  • Short and compact design, low weight
  • High pressures and high flow, pressure balanced (switch from 0 bar, regardless of differential pressure)
  • 100% tightness (Vacuum leak rate up to 10-6 mbar·l/s)
We develop specific solutions adapted to your requirements.
High Pressure Lateral Valves
PCD-H 10
PCD-H 10
Pressure Range
Orifice
Connection
KV Value
Material
0 – 500 bar
DN 10
Thread
1,5 m³/h
Brass, Stainless Steel
Possible Applications
Hydrogen refueling stations
Test benches
KBS 15
KBS 15
Pressure Range
Orifice
Connection
KV Value
Material
0 – 500 bar
DN 1,5 – 3 mm
Thread
0,066 – 0,312 m³/h
Brass (nickel plated), Stainless Steel
Possible Applications
Hydrogen refueling stations
Test benches
High Pressure coaxial Valves
KB 15
KB 15
Pressure Range
Orifice
Connection
KV Value
Material
0 – 400 bar
DN 2 – 8 mm
Thread
0,102 – 1,44 m³/h
Stainless Steel, Steel (nickel plated)
Possible Applications
Hydrogen refueling stations
Test benches
2/2 Way coaxial Direct Acting Valves
2/2 Wege coaxial direktgesteuerte Ventile
MK
FK
Pressure Range
Orifice
Connection
KV Value
Material
0 – 100 bar
DN 10 – 80 mm
Thread / Flange
1,6 – 70 m³/h
Stainless Steel, Steel (nickel plated), Brass
Possible Applications
Electrolysis,
Pressure swing adsorption,
Fuel cells,
Gas turbines,
Test benches
2/2 Way coaxial Externally Controlled Valves
2/2 Wege coaxial fremdgesteuerte Ventile
VMK
VFK
FCF
FMX
Pressure Range
Orifice
Connection
KV Value
Material
0 – 100 bar
DN 8 – 250 mm
Thread / Flange
1,6 – 650 m³/h
Stainless Steel, Steel (nickel plated), Brass
Possible Applications
Electrolysis,
Pressure swing adsorption,
Fuel cells,
Gas turbines,
Test benches

Your contact for hydrogen applications

Industries