Leaking Viper fitting

Discussions about HPLC, CE, TLC, SFC, and other "liquid phase" separation techniques.

4 posts Page 1 of 1
Hi, I have an UltiMate 3000 LC system. The Viper fitting between the sample loop and the injector valve is leaking slightly. I've tried tightening the fitting, then switched out the sample loop for a new one, but it's still leaking. Does anyone have any suggestions? Thanks!
if nut and ferrule already changed but still leak, maybe you could consider 10 port stator face valve issue, maybe need to check and change this stator face
GiMiTEC | https://gimitec.com/catalog
Try a vespel type ferrule ?

If you le the pump rund and switch the Inject valve of the WPS from Load to Inject, do you see a significant pressure increase?
If yes: either the valve is internally blocked or you have a blockage after the sample loop, e.g. needle and/or inject port and/or inject port capillary. Please refer to OpMan where they are located and how to access them.
Other possibility could be that the valve stator itself is defective, the thread coating of the sample loop port could be impacted. I know Rheodyne had an issue in the past.

4 posts Page 1 of 1

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