Air Preparation Flashcards
Contaminants in a pneumatic system come from 3 basic sources…
1) built-in
2) generated
3) ingested
How does built-in dirt occur?
In newly fabricated systems where components are dirty or where installation practices are below standard.
How is dirt generated?
As a system operates, moving parts come in contact with other surfaces begin to wear. The use use of incorrect fluid conductors may cause rust.
How does ingestion work?
When something like a valve breaks down and a maintenance man replaces it, he will most likely be working in a dirty environment.
What are 2 contaminant types?
Dirt and liquid
What is the first line of defense for industrial compressed air?
Intake filter and aftercooler.
When should you change a filter?
When the pressure difference is 10 psi or more.
What does “FRL” stand for?
Filter, regulator, lubricator
Why is proper lubrication necessary?
It is needed to coat the seals to reduce friction significantly extending their life.
Most pneumatic cylinders and motors require lubrication to prevent what?
Friction and scoring.
