Leaking

[Pinky Tan]

Does anyone has any ideas about the leaking at the gradient proportioning valve assembly?
I really need someone with experience in fixing the leaking problems in HPLC. I don't really want to replace a new one cos it is too costly.

[LCbob]

Hi
What is the make and model of pump. Also where is it leaking from the, i.e. the female / male fittings or from the metal solenoid.

[H2Oh]

If it's a quad proportioning valve and you only need to use a binary gradient, just swap you eluent in lines if it's the solenoid or the inlet to a working inlet or solenoid. Hopefully that will buy you some time. I've done that in the past. Sometimes the diaphram does wear out. Without knowing the make and model, I can't comment on a more permanent repair.