Zwick, a global manufacturer, has been providing reliable and durable butterfly valves for decades which are suitable for demanding industries, whether gaseous or liquid; a wide range of chemical and petrochemical processes; and temperature ranges from -215°C – +815°C.
To understand why Zwick valves are particularly well suited for use with hydrogen, one should take a closer look at two essential properties of hydrogen:
1) Hydrogen atoms have the disadvantage that they can embrittle metals which can lead to dangerous instability. Metal alloys with a nickel content of 10% – 30% show only very low embrittlement in contact with hydrogen. Zwick supplies butterfly valves in alloys with a corresponding nickel content.
2) Hydrogen is colorless, odorless, tasteless, and it reacts flammable to explosive in combination with atmospheric oxygen. This can be a very dangerous combination, as the escape of hydrogen cannot be perceived with the human senses. The triple eccentric butterfly valves from Zwick are 100% tight both internally and externally according to international test specifications!
Image credit: Zwick