StediFlo
t
57:1 Pump
13
Part 1601882-01
E
2012 Nordson Corporation
3. Adjust the pump air pressure to 2 bar (30 psi) so that it is running slowly.
4. Place a waste container under the filter drain valve and open the valve.
Close the valve when coating material starts to flow into the waste
container.
5. Ground the spray gun against the side of the waste container and spray
into the container until all air is purged from the system and coating
material flows smoothly from the gun, without spitting.
6. Adjust the pump air pressure to produce the desired fluid pressure. The
pressure should be no more than is necessary to produce an even spray
pattern with graduated edges at a distance of approximately 30
−
40 cm
(12
−
16 in.).
Desired output pressure
pump ratio = air pressure required
If you have a 57:1 pump, and you want an output pressure of 172 bar
(2500 psi) you would calculate the required air pressure as follows:
172 bar
57 = 3 bar (2500 psi
57 = 43.8 psi) air pressure required.
NOTE:
If the fluid pressure is too high, excessive material consumption and
overspray will occur. If the fluid pressure is too low, spray pattern fingering
and uneven coating thicknesses will occur.
7. If using a fluid heater, turn on the heater only after all air is out of the
system and coating material is circulating freely.
WARNING:
If using a fluid heater, always keep the coating material
circulating through the heater while it is on. Without a continuous flow
through the heater, the coating materials can cure inside the heater and
clog it. The heat could also cause solvents in the coating materials to
vaporize, expand, and damage the heater and other system equipment.
This could result in an explosion, causing property damage and personal
injury. Shut off the heater and continue circulating coating material through
the pump for 10
−
15 minutes before stopping the pump.
Changing Colors or Material
1. Flush the pump and system with a solvent or waterborne cleaning
solution compatible with the coating material used.
2. Clean the gun nozzle, suction strainer, and filter as necessary.
3. If changing material type, flush the pump and system again with a
flushing solution compatible with the new coating material.
4. Place the suction strainer into the new coating material. Open the filter
drain valve until the new coating is flowing out of the valve. Close the
valve.
5. Ground the spray gun against the side of the waste container and spray
into the container until all air is purged from the system and coating
material flows smoothly from the gun, without spitting.
