Magnum Venus Plastech Megaject MKIV Revision 1_2 - Manual (Page 15)

Megaject MK IV Issue 1_2 25/11/2003 Page 15 of 31
Recirculating & Repriming
Recirculating
Recirculation of the machine should be carried out on a regular basis to ensure resin and
catalyst flows are even, free of air bubbles (observed through recirculation returns) and to
prevent sedimentation of any fillers/additives in the resin system.
Recirculation should be carried out at the start of each shift or if new material has been
added to either the resin or catalyst containers.
Procedure
1. Ensure both resin and catalyst recirculation valves are in the recirculate position.
2. Adjust pump pressure regulator until the pump pressure gauge reads approx. 2
bar. If MPG is fitted, adjust MPG preset level to approx. 1 bar.
3. Turn the recirculation switch to the ‘on’ position.
4. Allow machine to recirculate for required period. Ensure recirculating materials are
free of air bubbles and even on both pump strokes.
5. Turn recirculation switch to ‘off’ position.
Repriming
To be carried out when the operator wishes to change the resin/catalyst in a machine which
has already been commissioned.
Procedure
1. Remove pick up filter from fluid. Recirculate machine to empty fluid lines
2. To clean the lines and pump, place pick pipe in solvent container and recirculate
until clean solvent is observed at the recirculation pipe.
3. Place the recirculation pipe in a waste container. Place pick up pipe in new fluid.
Recirculate machine until all solvent is discharged and new fluid is observed at
the recirculation pipe.
4. Place recirculation pipe in fluid container with pick up pipe.
5. Continue recirculating until material is free of all air bubbles.
Note: If the new material is of a similar chemical type to the existing material,
then it may not be necessary to clean the system with solvent before loading the
new material.