Must-Have Filling Adapter / Thread Adapter Noble Gas W21.8 Residual Pressure Valve to G5/8″ Female Thread

Thread Adapter for Noble Gas and Carbon Dioxide Valves W21.8 with Residual Pressure Valve to G5/8″ 200 bar Female Thread

For carbon dioxide (CO2) and all noble gas cylinders such as argon and helium, as well as gas mixtures used for shielding gas welding, valves are equipped with flow protection or residual pressure valves. This additional valve, a type of non-return valve, prevents gas from escaping from the cylinder and dropping to 0 bar if the cylinder valve is accidentally opened, leaving a residual pressure of approximately 5 bar in the cylinder. To fill these gas cylinders, this valve must be opened during the filling process. At the same time, this thread adapter allows the cylinders to be filled or gas to be withdrawn using compressed air fittings. The residual pressure valve is actuated via the set screw.

Technical specifications of the noble gas adapter for cylinders with a residual pressure Valve:

• Material: Hexagon (SW27), nickel-plated brass
• Connection A: W21.8 female thread, noble gas valve 200 bar according to DIN 477-6 (carbon dioxide, argon, helium, etc.)
• Connection B: G5/8″ female thread, compressed air 200 bar according to DIN EN 144-2
• Adjustment screw with hex socket for actuating the residual pressure valve in the cylinder valve
• O-Ring: NBR
• Total length: 35 mm

The user must ensure that the selected valve outlet connection cannot be connected to fittings of other standards or gases in order to prevent hazardous situations (e.g. leakage, incompatibility, risk of asphyxiation, explosion hazard).