© 2021 Nordson Corporation
7446567-02
2-3
Theory of Operation
Refer to Table 2-2 and see Figure 2-2.
Integrated power valves, located on the inside of the smart gun base and the valve
manifold, control the material’s flow from the supply gallery. The integrated power valves
are key components to the operation of the smart gun assembly.
Some smart guns are fitted with a swivel assembly. This swivel assembly provides
precise movement and allows the smart gun to dispense in restrictive areas. The swivel
assembly has four air supply ports and a grease weep port. These ports feed air supply
to each of the three integrated valves. Three of the ports open each valve individually and
the fourth port, common to all valves, supplies air to close all the valves simultaneously.
The smart gun was designed and integrated with the swivel to prevent the air lines from
becoming wrapped around the smart gun base. The nozzle end is an application specific
piece. Standard nozzles will have three outlet ports. Each outlet port will dispense at a
different angle. The three common angles are 45, 90 and 0 degrees. These angles and
the long neck of the smart gun are the keys to dispensing material in restrictive areas.
To dispense material, the common air to close valve ports have air pressure released/
exhausted. This will relieve air pressure on every valve, not just the preferred valve. The
valve springs in the smart gun will maintain pressure to keep the valves closed. At this
time, air can be supplied to the preferred valve to dispense material. Each cartridge valve
within the smart gun assembly is opened independently via a unique air port labeled 1, 2,
and 3. Each cartridge valve also has a spring to close. The spring also prevents the valve
from opening when not in use. All valves can be held closed via one common air line that
connects to any port labeled 4.
