18
© 2021 Nordson Corporation
Step
Task
Procedure
Continued...
3
System Relief Valve Setting and
Fluid Pressure Setting
10. Check the pressure relief valve operation by adjusting the back
pressure regulator until the valve opens.
For lacquer coating systems the valve is typically set to open at
89.6−91.4 bar (1300−1325 psi). For Cleanspray systems the valve
is set to open at 51.7−55.2 bar (750−800 psi). Do not increase the
pressure more than 1.7 bar (25 psi) over the relief valve setting.
If increasing the pressure to 1.7 bar (25 psi) over the relief valve
setting does not open the relief valve, then the relief valve is
either not adjusted correctly or the valve is defective and must
be replaced. Do not exceed 93 bar (1350 psi). Refer to
Pressure
Relief Valve Adjustment
WARNING:
Do not operate the system if the pressure relief valve
does not open at the correct setting. The valve protects the pump and
system components from excessive pressure. A malfunctioning or
improperly adjusted relief valve can cause pump damage, component
failure, and personal injury.
11. Adjust the back pressure regulator to the desired production
pressure.
12. Trigger the applicators to purge any remaining air from the system.
4
Fluid Temperature Setting
WARNING:
Coating material must be circulating through the fluid
heaters before they are turned on. Operating the heaters without
circulation can result in heater plugging and heat limiter failure.
13.
Turn the fluid heaters on. Allow 12−15 minutes for the coating
material to heat to the desired operating temperature.
14. Check the system thermometer. If the coating material is not
within 5 degrees of the desired temperature, adjust the heater
thermostats. Refer to your heater manual for procedures.
2-Way
3-Way
2-Way
3-Way
2-Way
3-Way
Normal Operation
Flushing
Priming
Valve Handle Positions
Figure 9 Ball Valve Handle Positions
