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MANUAL NO. 26-4
Page 2-2
A-l HANDGUN
DESCRIPTION
(continued)
The gun features a "cool handle" design with no heated parts in the
handgrip/trigger
section.
The swivels allow the gun to be rotated 340 degrees at the hose connec-
tion without twisting or damage to the hose.
The thumb screw in the back of the gun handle is used to adjust trig-
ger travel, for consistent bead size with every application. When the
thumb screw is rotated fully clockwise, it locks the gun to prevent in-
advertent triggering when not in use.
Switched versions incorporate a microswitch, used to control operation
of the material supply pump, on the trigger mechanism.
Heated versions of the gun have two heater cartridges in the
hydraulic body Gun temperature is sensed and controlled by a
resistance temperature detector (RTD), also located in the body.
Optional Nozzles and Hoses
-
A wide variety of different nozzles, each allowing for precise control of
material deposition, are available for the gun. Section 8 of this manual
includes lists of available nozzles and heated hoses, as well as replace-
ment parts for the gun.
THEORY OF OPERATION
Material is delivered under hydraulic pressure from the bulkmelter or
unloader through a hose to the gun. Heated hoses are used with
bulkmelters to keep the material at the proper application tempera-
ture. Hose and gun temperature is controlled by either the bulkmelter
or a System Sentry@ Control Console.
The trigger is connected to a ball and seat valve in the hydraulic body.
Squeezing the gun trigger pulls the ball away from the seat, allowing
the pressurized material to be forced through the opening in the seat
and out through the nozzle.
A microswitch attached to the trigger mechanism closes and actuates
a solenoid (on piston pump units), starting the pump.
Issued 3/93
0 NORDSON CORPORATION 1993
All Rights Reserved
Publication P/N 108 061
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