When
Liquid droplets appear at a viper connection
Liquid droplets appear at the drain hole
Tools required
Torque screwdriver with Viper bit and needle seat bit
Follow these steps
Liquid droplets appear at the drain hole of a valve:
Wipe the droplet away and observe the valve. If liquid droplets still appear at the drain hole, contact Thermo Fisher Scientific Technical Support. Otherwise continue with next steps.As leakage usually occurs at a connection, visually inspect all connections in the flow path.
Loosen the capillary connections at the affected valve and retighten them with the torque screwdriver using the Viper bit.
If the injection valve with the needle seat is the affected valve:
Loosen and retighten the needle seat with the torque screwdriver with needle seat bit.
NOTICE
Needle seat can get damaged when using other tools
The torque screwdriver with needle seat bit is intended for tightening the needle seat. With the help of this tool the needle seat is tightened correctly and will not be overtightened. Do not use any other tool.
NOTICE
The torque screwdriver with needle seat bit can get damaged if not used correctly.
Tighten all connections in the flow path with the torque screwdriver using the Viper bit.
Run the script: D02 - Test System Tightness (What Should Be Tested = Sampler) if the leakage still occurs.
Liquid droplets continue to appear on the injection valve:
Replace the needle unit and the needle seat. See Replacing Needle Seat and Needle Unit.