Frit ring stuck in 1290 in-inline filter

Hello everyone

I'm experiencing a higher-than-normal backpressure on a 1290 binary pump, and suspect that the frit ring in the in-line filter (5067-6189) installed right after the pump is partially clogged, as this have previously been the case.

I’ve never changed this frit before, and I can’t see how I’m supposed to replace the frit ring, as the 3 encircled parts below (including the frit in the middle) are tightly stuck together. The technical notes don’t mention any tools other than the ¼ inch wrench needed to first remove the capillary connected to the filter housing, and then open the filter to access the frit ring.

I would greatly appreciate some advice on whether this is normal, and how to replace the frit ring.

 

Thanks

Mads

Parents
  • I just had this same problem and came across this forum post. I was unsatisfied that the only answer was to shell out $400 for a new inline filter. So I called Agilent tech support for advice. They suggested to put the stuck pieces in a sonicator. I tried that but it didn't work. I mention it here because it might work for some.

    What did work was this: I wrapped the filter insert in a folded kimwipe and gripped it gently with pliers to hold it steady. Then my colleague wedged a razor blade between the frit ring and the filter insert, and tapped on the top of the razor blade with a screwdriver. The frit ring popped right off. 

Reply
  • I just had this same problem and came across this forum post. I was unsatisfied that the only answer was to shell out $400 for a new inline filter. So I called Agilent tech support for advice. They suggested to put the stuck pieces in a sonicator. I tried that but it didn't work. I mention it here because it might work for some.

    What did work was this: I wrapped the filter insert in a folded kimwipe and gripped it gently with pliers to hold it steady. Then my colleague wedged a razor blade between the frit ring and the filter insert, and tapped on the top of the razor blade with a screwdriver. The frit ring popped right off. 

Children
No Data
Was this helpful?