In most cases the fluid in the application pan should be well mixed by good circulation and filtered. This is best accomplished by circulating the fluid through another tank close to the application pan where the fluid from the pan can be screened to remove debris. The sceen can be easily inspected and replaced without disturbing the application pan. The tank is often a "bean pot", a jacketed stainless steel vessel used for cooking beens in food processing plants. Circulating temperature controlled water through the jacket will control the phenolic fluid temperature.

This system is very robust and user friendly. All surfaces touched by resin can be cleaned and scrubbed to avoid the inevitable build-up of cured resin. The only drawback is the amount of fluid required to fill the system. This usually is not an issue in production but can be in R&D.

Thanks for the information.  
Can you provide information where to look for been pot vessel system?  Thanks

There are many sources. Here is but one example http://www.southbendnc.com/specs/kb25.pdf
Try google and even e-bay. There are many used ones available.