Page 120 - Training 2019

replacing filters should be done off-line by someone else, with the operator simply
swapping a complete pump and filter assembly and reattaching hoses. It may require an
additional pump, but the impact on productivity and the reduction in the resistance to filter
use will be worth it. Besides having to shut down to swap filters if done at press, there is a
possibility of reintroducing captured particles during the swap or of making a mess
resulting in even more downtime. If you must swap filters at press, having spare filters on
hand will help reduce downtime. In either case, I recommend the use of quick-disconnects
where possible and appropriate. I fully appreciate that for those not in the habit of using
and working with filters, introducing them will require additional effort. Many, especially
the narrow web folks who are more inclined to just pour ink into pans and "pan it", don't
even have pumps or use them infrequently, and even if they did, it can be a challenge to
incorporate in-line filters on the small ink pumps used for narrow presses. For them, the
only option may be to strain the inks as they go to press and/or return from it, using
cheesecloth, household paint strainers, or similar mesh products. However, if the situation
lends itself to in-line ink filtration, I encourage everyone to consider implementing in-line
ink filtration.

INK FILTERS TRAINING MANUAL 8
Updated - 24 June 2019