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WS1225
8-2017/Rev.B
104 S. 8th Ave. Marshalltown, IA Phone 800-888-0127 / 641-753-0127 • Fax 800-477-6341 / 641-753-6341 www.
MARSHALLTOWN
.com
MATERIAL NOZZLE SIZE SELECTION:
A few general statements should be noted:
1.
Always read and follow the spray material manufacturer's mixing instructions. If not
specifi ed in those instructions, the compound should be thoroughly mixed, free of
lumps, and be the consistency of pancake batter.
2.
Always set your pattern on scrap sheetrock before spraying your fi nished product.
Note the compound consistency, orifi ce size, air pressure at the compressor, relative
ball valve position, and trigger setting for future reference.
3.
The more open the trigger, the more material that will be applied with a resulting coarser pattern.
4.
The higher the air pressure, the fi ner the pattern; the lower the air pressure, the coarser the pattern.
5.
The higher the air fl ow, the fi ner the pattern; the lower the air fl ow, the coarser the pattern.
6.
Larger orifi ce openings will produce a coarser pattern than a smaller opening.
7.
The position of the trigger controls the amount of material fl ow. As the trigger is pulled back, more material is
allowed to feed through. Generally the distance between the air nozzle and the material nozzle should be
slightly greater than the size of the selected orifi ce.
The gun on the DuoTex™ is intended to utilize a full trigger pull at all times. Adjusting the trigger fl ow control dial determines
how far the air nozzle is pulled back. This allows for a more comfortable, full trigger pull. Use the trigger lock for reduced
fatigue on larger projects.
NOZZLE & AIR PRESSURE RECOMMENDATIONS:
Texture Pattern / Material
Nozzle Size
Air Pressure
Fog
Orange Peel
Splatter/
Knockdown
EIFS
Stucco
3
HIGH
X
X
4
MEDIUM TO
HIGH
X
X
6
X
X
8
X
X
X
10
HIGH
X
X
X
12
X
X
X
NOTE: These settings are only suggestions to get the sprayer set in the right range. There are several factors that might
affect the results of the fi nal texture pattern, including: length of hoses used, consistency of material, and material aggregate
size.
The DuoTex™ ships with six standard nozzle sizes: 3, 4, 6, 8, 10 and 12mm openings. The sprayer must be used with a
spray nozzle at all times. To install a nozzle:
1.
Make sure machine is switched off or unplugged from the wall.
2.
Open ball valve on gun (vertical position) and wait for all excess air to escape the system. Close ball valve
(horizontal position) once air stops coming out of the end of the gun.
3.
If there is material in the hose, press the gun trigger while the gun is directly over the hopper (with lid off).
This will allow any pressurized mud in the hose/gun to empty back into the hopper.
4.
Unscrew nozzle retaining collar and remove nozzle (if previously equipped).
5.
Replace with new nozzle, and reconnect retaining collar. Pull the trigger on the gun while screwing on the
retaining collar to allow the nozzle to seat completely.
MATERIAL NOZZLE INSTALLATION AND SELECTION
Control Dial
Trigger Lock
Ball Valve
