First Question: yes, RLF ADJ stands for Relief Adjustment. Ideally it won't need any adjustment, but I'm not sure of that yet. I'll include instructions in either case.First Question:
What does RLF mean? (RLF Adjustment)
Are the pressure gauges displaying the pressure AFTER or BEFORE each filter? (It might make the top too cluttered if you tried to include that clarity in the arrows - or maybe not if you're clever
Second Question: IN PRESS is the inlet pressure (pre filters), OUT PRESS is the outlet pressure (after both filters).
These are great questions because they are helping me make the label more clear. I'm going to try and add a few more lines to indicate where the pressure gauges read and how the relief is plumbed. The trick is to do that without getting too busy to be clear... I'll post another version soon.
Thankfully, from a machining perspective, what or how much I put on there makes almost no difference...