Nordson cp Product Manual

Contents

Operation4-2Part 104373−03 2015 Nordson CorporationSolvent FlushPerform a solvent flush to clean out any dirt, grease, and machining chipsleft in the hydraulic portion of the pump and other system componentsduring manufacturing and installation. Flush the system when changingcoating materials or if you will not be using the system for more than a fewdays.The flush material can be the same solvent used in the coating material.For waterborne coatings use butyl cellosolve or soapy water.1. Remove the gun nozzle, or, if using a circulation kit, insert the drain rodinto a waste container.2. If used, close the circulation valve and open the drain valve.3. Insert the siphon rod into a container of suitable flush material orpressurize the feed line with flush material.NOTE: Make sure the air regulator is backed all the way out. If the pump isstarted at full pressure with no coating material in the lines, it will operateerratically.4. Pressurize the air supply line and open the air shutoff valve.5. Slowly increase air pressure until the pump starts to operate. Adjust theair regulator until the pump is operating at 20 strokes/minute. If using adead-ended system, trigger the spray device to allow the pump to start.NOTE: If the pump does not start, push the manual override button on thedouble pilot valve.6. When you first start flushing the system, air will be mixed with the flushmaterial, causing the spray device to spit or bubbles to appear in thewaste container. Operate the pump until all the air is out of the system.7. Adjust the air lubricator to dispense 1 drop of oil every 15−20 strokes.Use a small screwdriver to turn the adjustment screw on the top of thelubricator.8. If using a circulation kit, close the drain valve and slowly open thecirculation valve until the pump strokes 20 strokes/minute. Allow theflush material to circulate through the system for 15 to 30 minutes.9. Reduce the air pressure to zero to shut off the pump.10. If used, close the circulation valve and open the drain valve.11. Remove the siphon rod. If the pump is pressure fed, close the shutoffvalve in the pressure feed line.12. Increase the air pressure until the pump starts. Discharge the flushmaterial into a waste container. If using a dead-ended system, triggerthe gun until all flush material has been pumped out of the system.13. Reduce the air pressure to zero and close the air shutoff valve.14. Drain the fluid filter. Clean the filter screen.