On a system P&ID a tank level controller symbol is shown inside a circle as LISA (level-indication-switch-alarm) plus on the outside of the circle H & L (high-low) is shown but it also has the letters FF.
I assume the FF has something to do with flow. My 65 year old brain has probably just stopped working but can someone please confirm the meaning of the FF.
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Cities are ceaseless engines of engineering activity. Itâ€™s likely that while you were on your way to work, you encountered a number of infrastructure development projects under construction. Download Now
When was the last time you drove down the highway without seeing a commercial truck hauling goods?The ubiquity of these machines underscores the important roll they play in modern commerce. Download Now