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Dymax SG-200 High-Flow Spray Gun System User Guide
Optimizing Spray System
WARNING!
Pressurizing the components in the dispensing system beyond the maximum
recommended pressure can result in the rupturing of components and serious personal injury. To
minimize the risk of rupturing components and injury, do not exceed the maximum operating
pressure of the components in your fluid dispensing system.
Discharging fluids or compressed air against your skin can cause very serious injection injury. To
minimize the risk of injection injury, do not place the spray cap in contact with your skin.
Adjust the Flow Rate & Spray of the Dispensing System
After assembling and purging the air from the dispensing system, follow the steps below to adjust spray and
flow rate per application needs.
The keys to precise and consistent delivery of fluid include:
■
Proper selection of a spray cap
■
Proper balance between atomizing and material pressure ratios
■
Precision control and stability of the air pressure in the reservoir
Adjusting the Reservoir Pressure
1.
Select the spray cap you will be using for the application and install it on the spray gun. There are 3 nozzle
& cap combinations with larger/smaller bores and geometries that affect spray and deposit consistency.
It is recommended that spray trials be performed to evaluate performance.
NOTE:
Good practice is to set up the system so that it operates at a relatively low pressure; the ideal
reservoir operating pressure
—
as measured and controlled by the precision pressure regulator
—
is 30 to 50
psi (2.1 to 3.5 bar). You can use higher pressures if, when using the largest needle or tip available, you still
cannot achieve the desired flow rate.
2.
Adjust the reservoir pressure to about 15 psi (1 bar) using the material pressure regulator (on bottle drop-
in tanks, adjust the air precision regulator instead).
NOTES:
The maximum recommended reservoir operating pressure is 80 psi (5.5 bar) for cartridge reservoir
systems. Beyond that, there is a risk that air will infiltrate the cartridge and be entrapped in the fluid.
For consistent, repeatable dispensing, it is important that the pressure in the reservoir remains stable even
if the supply pressure fluctuates. To maintain uniform pressure in the fluid reservoir, set the pressure of the
material pressure regulator to at least 10 psi (0.69 bar) less than the air filter/regulator.
Adjusting the Spray Pattern
1.
Turn on the air supply to the ram pump, DVC-345 controller, and spray gun atomizing regulator stand.
2.
With the gun secure and pointing away from people and unintended target objects, turn on the atomizing
switch. Air will begin
to flow immediately. The atomizing flow is in an “Always On” position.
3.
Aim the spray nozzle at the desired surface and depress the trigger to begin material flow.
4.
Adjust the nozzle size, pressures, and flow rates as necessary to achieve desired performance.