Hydrogen Vent Silencers
Engineered specifically for hydrogen systems
where conventional silencers fail
For safe pressure relief, ultra-low noise emissions, and reliable operation under customized backpressure requirements
in electrolyzers, fuel cells, hydrogen refueling stations, and LH₂ systems.
Hydrogen-specific
design
ASME & PED
compliant
Worldwide
support
Why Silencers are Essential
The release of hydrogen generates extremely high noise levels.
This noise can:
-
Damage system components through vibrations
-
Endanger personnel
-
Mask critical warning sounds
-
Reduce the acceptance of hydrogen technologies
-
Prevent compliance with noise regulations and delay project approvals
Without proper silencers, safe hydrogen operation is not possible!
GLAUNACH GMBH is a member of Hydrogen Partnership Austria. The National Hydrogen Cluster
high
pressure
H₂ Micro Silencer
For applications where some back pressure in the vent line is acceptable, our hydrogen micro silencers offer a compact and efficient solution for noise reduction.
The pressure reduction takes place directly inside the silencer. This allows smaller pipe sizes before the silencer. At the same time, the controlled pressure release inside the micro silencer reduces noise directly at its source.
The result is high noise reduction with a compact design and easy system integration.
Our micro silencers are designed according to the ASME Boiler & Pressure Vessel Code and the Pressure Equipment Directive (PED), ensuring high safety, reliability, and efficiency.
low
pressure
H₂ Purge Silencer
For applications where high back pressure or pressure loss in the vent line is not acceptable, our purge silencers provide an effective solution for noise reduction during purging and venting.
Noise reduction is mainly achieved through sound absorption. This allows hydrogen to be vented with very low pressure loss while still reducing flow noise effectively.
This type of silencer is often used in fuel cell systems and electrolysis plants, where low back pressure is an important requirement.
liquid
hydrogen
- 269 °C
- 452 °F
LH₂ Silencer
Our solution specially developed for liquid hydrogen applications takes into account the specific requirements of cryogenic hydrogen systems.
The design specifically considers the thermal material behavior at extremely low temperatures as well as the significant volume expansion of liquid hydrogen.
In consultation with our customers, additional project specific requirements and standards such as PED, ASME, or NASA recommendations can also be considered during design and manufacturing.
H₂ Inline Silencer
The inline silencer, specially developed for hydrogen applications, can be designed as a diffuser silencer, absorptive silencer, or a combined design, depending on the allowable back pressure.
Thanks to its compact inline design, the silencer can be easily integrated into existing piping systems while effectively reducing noise.
Typical applications include hydrogen systems with high flow velocities, limited installation space, and increased requirements for safety and controlled gas flow.
Design and manufacturing are carried out in accordance with the Pressure Equipment Directive (PED) and ASME requirements.
Accessories
Lambda Vent
The ideal addition to inline silencers
The upward-directed discharge supports the rapid dilution of the released hydrogen with ambient air and helps to maintain safety-related hazardous areas in accordance with the requirements of DVGW G 442.
Upon request, Glaunach can supply suitable lambda vents as an optimally matched addition to the inline hydrogen silencers.
H₂ Rain Cap
The H₂-Rain-Cap is equipped with a rain-resistant vent that enables the controlled release of hydrogen after operation.
By minimizing the risk of hydrogen buildup in the silencer, it supports safer operating conditions.
References
PEM Electrolysis Systems
Hydrogen Silencers for venting and purging PEM electrolysis systems significantly reduce noise generated during operation. They improve workplace safety, ensure compliance with noise regulations, and minimize impact on surrounding areas. As a result, they support broader acceptance of hydrogen technologies and sustainable energy solutions.
Fuel Cell Systems
We manufacture custom silencers for fuel cell systems.
In doing so, we take into account the maximum allowable pressure in the vent line to ensure reliable protection of sensitive system components.
Even with very low pressure loss limits in the millibar range, our silencers provide effective and safe noise reduction.
Numerous internationally active and renowned system manufacturers rely on our silencing solutions for their fuel cell applications.
Metal Hydride Hydrogen Storage Systems
Glaunach has equipped the world’s first building-integrated hydrogen metal hydride storage system for a residential home with Hydrogen Silencers. In this system, small amounts of hydrogen are purged at regular intervals. This process is perceived as disturbing by local residents, especially during nighttime hours.
Glaunach Hydrogen Silencers not only meet but exceed even the strictest residential noise regulations.
Hydrogen Compressors
Glaunach supplies hydrogen compressor solutions to leading manufacturers worldwide.
Our proven diffuser system has been specifically adapted to meet the unique requirements of hydrogen and further enhanced by the development of a dedicated micro-silencer.
This compact silencer is designed for the controlled venting of small residual amounts of hydrogen and ensures effective noise reduction – even at extremely high pressures.
Refueling Stations
Glaunach has supplied silencer solutions to several hydrogen refueling stations worldwide.
We manufacture specialized systems for safety valves (PSVs), bypass lines, and emergency vents, tailored to the specific requirements of modern hydrogen infrastructure.
Our silencers are designed to reliably comply with applicable noise regulations – especially in noise-sensitive urban areas.
They enable safe, controlled, and low-noise pressure relief without impairing the function of safety-related components.
Boil-Off Silencers for
Liquid Hydrogen Storage Systems
Glaunach has extensive practical experience with systems for the transfer and refueling of liquid hydrogen. During this process, typically 2 to 5% of the hydrogen rapidly evaporates (boil-off), making sound-attenuated venting of the system essential.
To meet these demands, Glaunach has developed a specialized boil-off silencer designed to operate safely and reliably under both the extremely low temperatures of cryogenic media and high operating pressures.
