Schneller Versand Thread protection cap W21.8 noble gas valves

Union nut with W21.8 internal thread and O-ring seal

Gas bottle valves for 200 bar noble gas bottles (argon, helium, welding gas and carbon dioxide) have an external thread W21.8. These valves are protected from mechanical damage by a protective cap but not from gas loss. This cap nut with O-ring seal is pressure-stable and can protect the thread from mechanical damage. In addition, gas loss can be avoided if the valve is leaky or accidentally opened. Contamination of the valve connection is avoided, which is particularly important when using ultrapure gases, also known as alpha gases. technical

Material nickel-plated brass

O-ring 11.5×2.5

Wrench size 30mm