Understanding Paint Circulation System

There are three models variant paint circulation system. Every model have
advantage and disadvantage of each. The system can comparison in some
factor.

The model are Dead End system, 2-Pipe system and 3rd Line

Factors	Dead End	2-Pipe	3rd Line
Initial Cost	Least costly	Medium cost	Higher cost
Operating Cost	Low	Low	High
Ease of operation & maintenance	Very easy to operate, make adjustment & maintain	Very easily to operate, make adjusment & maintain	Good understanding of system needed to operate & make adjustment High maintenance required
Flexibility	Very flexible. New stations can be added & existing stations deleted or relocated easily. Can be easily converted to a full ciscilation system. Change in hose length and diameters easily accomodation.	Limited adaptability to change, Re-engineering may be necessary with changes in system requirements	Very flexyble system when changes have to beacconodation of new stations, deletion or recolation of existing stations & changes in hose lengths and diameters
Circulation	main line circulation only	Full circulation to gun/bell	Full circulation to gun/bell
Material	Only good for material not requiring circulation	Good for all current material including mica	Good for all current material including mica
Fill volume inside piping	Low	Low	Highest
Pump volume & pressure	Low	Low	Usually Highest
Material wastage	Highest - non-circulating material have to purged out after each to prolonged stoppage.	Minimal	Minimal