Magnum Venus Plastech APS E-FIT-F-CMB-APS-6 - Manual (Page 8)

Chapter
3
ATC Gun Instructions
FEATURES OF THE AT SERIES ACTUATED GUNS
There is basically one adjustment on the gun. This is the air refinement adjustment. All adjustments of
needles, etc. have been taken out of ht egun. The AT series guns are “air trigger” guns. Air is moved into
two chambers in which are located two pistons. The air moves the pistons forward or backward depend-
ing on the position of the trigger, e.g. on or off. These air pistons in turn are attached to the needle as-
semblies. This actuation is what opens and closes the valves. The response is instantaneous. There is
no lead or lag of catalyst spraying without resin or vice-versa.
The seat, diffuser, and packing arrangement are built into a cartridge assembly for service, adjustment or
replacement. The cartridge is removed from the front of the gun.
The catalyst valve is the same unique, patented design as on our previous guns. It is also removable from
the front of the gun.
The air valve for triggering the gun is a 4-way air valve that works the same as the catalyst valve. A rod
spool design with the three O-rings opens and closes the air passages to the pistons.
The AT series guns are the most advanced state of the art guns introduced to the composites industry.
This series features low maintenance, few adjustments and superb quality. The gun will help give you a
superior finished product along with few problems, and a long life of service provided you do not soak the
gun in acetone.
Additional benefits will be seen as the needles are kept out of the spraying atmosphere and enclosed
inside the gun. The air section and the fluid section of the gun are separate, avoiding the possibility of
fluid in the air section. The guns are light weight, well balanced and feature the patented air assisted
airless design.