ESS TRG-5, Owner'S Manual, Page: 13 / 41

7
ess TrG Owner’s Manual
Setting the air pressure for the
incoming air flow
1. start with an initial pressure setting of 60 PsI.
2. Count the number of nozzles on your spray gun. add 5 PsI
for each nozzle over 1. For example:
- for a single nozzle add 0 to the initial setting
- add 5 PsI for a two nozzle spray gun
- add 10 PsI for a three nozzle spray gun
3. Determine the length of air hose furnished with your
sprayer. add 10 PsI to the initial pressure setting for each
100 feet of air hose length. This is the desired air pressure
setting for the external air source.
Example:
Your TrG has the optional two-nozzle gun with 100 feet of air hose on
the reel.
60 PsI + 5 PsI + 10 PsI = 75 PsI
Example:
Your TrG has a single-headed nozzle and has 250 feet of hose.
60 PsI + 0 PsI + 25 PsI = 85 PsI
note: The spray gun air flow requirement is 6 to 10 CFM of air flow
per nozzle.
The air pressure required at the nozzle is 55 to 75 PsIG.
(It’s greater because the design of the MaxCharge nozzle
increases the air pressure and air velocity.)
air flow at the upper end of the range will require higher air
pressure from the source and will yield a longer spray plume
and finer liquid droplet size.
The charge level at the nozzle will increase or decrease as the
air flow changes due to the liquid/air ratio varying. by
regulating the air pressure and checking the charge level the
nozzle liquid charge level can be optimized.
To set the incoming air
pressure:
Turn on the air from the ex-
ternal air source. locate the
air inlet regulator (liquid-filled
gauge with a range of 0 to 100
PsI). Pull the adjustment knob’s
black plastic cover to unlock it.
Turn left (counter-clockwise) to
decrease pressure; turn right
(clockwise) to increase pres-
sure. set the pressure accord-
ing to the formulas described
at left. Push the black plastic
cover in to lock the new setting.
External
air
source
Air
inlet
filter
SS
tank
Incoming
air
pressure
0–60
0–100
Tank air
pressure
Reel assembly
In
Out
Liquid line
(Gray)
To
Spray gun
TRG-5 Air flow/Liquid flow
For precise measurement of the charge
level, contact ESS to purchase the op-
tional multi-meter kit with specialized
probe. ESS S/N AS2572