PUMPS & VALVES 2025 - We are part of it!
7. November 2025
Ihr Gratisticket für den Besuch bei uns am Stand am 26. und 27. November 2025 – Stand G35, Halle 4, Messe Zürich Die PUMPS & VALVES gilt als der Treffpunkt
We are pleased to present this product range of our long-standing partner Labom in more detail here.
HYDROGEN PERMEATION THROUGH STAINLESS STEEL
The hydrogen molecule decomposes into hydrogen atoms on the surface of metals.
These can diffuse through metals. The hydrogen migrates through the tetra- and octahedral gaps of the metal lattice. On the other side, the molecules reunite. The overall process is called permeation.
The permeation rate depends on temperature, pressure and material.
RELEVANCE FOR PRESSURE MEASUREMENT TECHNOLOGY
Diaphragm seals have a thin metal membrane on the process side.
The pressure is transmitted to the sensor via the diaphragm and a filling liquid, usually oil. If hydrogen penetrates the membrane, it dissolves in the oil.
If the saturation is exceeded, the hydrogen beads out when the pressure is relieved and leads to measurement errors such as zero point shift.
SOLUTION
Depending on the process conditions, a diaphragm seal with a diaphragm, also internal (with the Ci4 series), made of hydrogen-resistant stainless steel or a gold-plated diaphragm can be used.
Our partner Labom has scientifically investigated the effect of permeation and has developed a tool to calculate hydrogen permeation and dissolution in the diaphragm seal oil.
For this, we need information from the plant operator on temperature, pressure and hydrogen content. This is used to calculate how long the service life of the unit would be for different configurations. Among other things, the temperature is decisive for this, as there is a strong temperature dependency - Labom has therefore also given special consideration to this aspect in the calculation formula according to Arrhenius' approach. The service life is calculated from the totality of these results.
We can play with that: Is a stainless steel membrane enough to get ten years of service life, for example?
Or do we need a gold coating and if so, what thickness of coating makes sense?
We and our partner Labom will be happy to assist you with our expertise in the field of hydrogen and look forward to hearing from you.
PUMPS & VALVES 2025 - We are part of it!
Ihr Gratisticket für den Besuch bei uns am Stand am 26. und 27. November 2025 – Stand G35, Halle 4, Messe Zürich Die PUMPS & VALVES gilt als der Treffpunkt
Sensor replacement without system shutdown – dead-space-free precision and maximum availability
The ASEPTconnect (MZ2300) inline housing from Labom is perfectly suited for pharmaceutical production facilities, as it has been specifically developed to meet the highest hygiene and sterilization requirements (CIP/SIP). With its standardized aseptic clamp connection according to DIN 11864-3,
When backflow is not an option: True tightness without compromise
In many industrial applications, simple check valves are used. They are cost-effective, robust, and usually reliable – but not always completely tight. Especially with gaseous media, low system pressure, or