TECHNICAL BULLETIN #2 - PCSI  Flush Procedures

Back to Spec List

 Aromatic to Aromatic

Þ    Turn proportioner and air supply off.

Þ    Lift drum pumps out of old system, wiping off as they are lifted out.  (See diagram 1.)

Þ    Set drum pumps into new Aromatic material.

      Option 1 Spray Flush 

¨      Trigger gun and spray.  New material will push old material through system and out.

       Option 2 Pump Out

*     Remove spray gun from end of hose line.

*     Turn air and proportioning unit back on.

*     Reduce the output pressure of the proportioning  unit to lowest setting.

*     Attach separator fangs to the gun coupling block at the end of the hose.

*     Turn proportioner on and use the proportioning pumps to flush the system out while collecting A & B resins in separate clean pails.

*     Use caution when opening block valves, as there will be some pressure.

*     Pump out approximately ¾ of a gallon per 50’ section of hose per side.

*     Reattach the spray gun, return the proportioning unit pressure to normal and spray through for 5 - 10 counts.   You will now be into the new system.

Þ    This same procedure can be used when flushing the machine with solvent.

*    DO NOT USE JUST THE DRUM PUMPS TO FLOW MATERIAL THROUGH THE PROPORTIONING UNIT.

 Aromatic to Aliphatic and Aliphatic to Aromatic

Þ    Caution : Cross contamination can seriously affect the performance of the Aliphatic system.

Þ    When removing drum pumps from Aromatic material, take care to remove all visible signs of  Aromatic material from the drum pumps.  Use solvent to help with cleaning of pump before placing into Aliphatic material.

Þ    Hold-up space in the top of the drum pump must be drained before placing into Aromatic drum.  (See diagram 1.)

          Option 1 Spray Flush

¨     Trigger gun and spray.  New material will push old material through system and out.

¨     You may observe some strange elastomeric material being produced when you get to the change-over point.   

                        Option 2  Pump Out

*     Remove spray gun from end of hose line.

*     Turn air and proportioning unit back on.

*     Reduce the output pressure of the proportioning to the lowest setting.

*     Attach separator fangs to the gun coupling block at the end of the hose.

*     Turn proportioner on and use the proportioning pumps to flush the system out while collecting A & B resins in separate clean pails.

*     Use caution when opening block valves, as there will be some pressure.

*     Pump out approximately ¾ of a gallon per 50’ section of hose per side.

*     Reattach the spray gun, return the proportioning unit pressure to normal and spray through for 5-10 counts.  You will now be into the Aliphatic system.

*   DO NOT USE JUST THE DRUM PUMPS TO FLOW MATERIAL THOUGH THE PROPORTIONING UNIT.

Back to Spec List