Dow FROTH-PAK Refill Systems - Manual (Page 19)

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5 . Turn the right regulator stem clockwise to the proper
pressure setting of the “B” tank (120-160 psi – Do not
go over 225psi) (see section 12) . If a hissing sound
occurs, further tighten the yellow-coded nitrogen line
connection to the nitrogen regulator assembly and/or
the nitrogen intake valve connection on the “B” tank
using an adjustable wrench . If the right gauge fails to
indicate a pressure setting, contact your Dow Chemical
Sales Representative .
6 . Slowly open the nitrogen intake valve of each tank .
The valve handles should be parallel with the
nitrogen lines .
7 . Slowly turn on the chemical valve of each tank . The
valve handles should be parallel to the chemical lines .
Verify that the filter connection of each tank is tight
and that no chemical leaks are present .
8 . Slowly turn on the on-off valves . The handles should
be parallel to the chemical lines . Verify that the
connections of each valve are tight and that no
chemical leaks are present .
9 . Slowly turn on the in-line on-off valves . The handles
should be parallel to the chemical lines . Verify that
the connections of each valve are tight and that no
chemical leaks are present .
10 . Remove the used nozzle by pushing down the
nozzle ejector .
4 .2 Calibration Instructions
Equipment needed: PPE, scale capable of weighing in grams, paper
bags (lunch bags), calibration nozzles, and pressure gauges .
1 . Ensure chemical temperature in tanks and lines are
70°F (21°C) or higher .
2 . Set pressures at recommended settings (120-160psi –
Do not go over 225psi) .
3 . Ensure chemical is flowing properly through dispenser
with a calibration nozzle in place .
4 . Know the bag weight so the weights may be subtracted
out of the total weight of the chemical, i .e .
180 divided by 162 equals 1 .11 ratio
(a) (B)
Weight 188gms 170gms
Bag Weight -08gms -08gms
180gms 162gms
5 . Place calibration nozzle in the dispenser . Before dispensing
material into bags, pull trigger to ensure material is
flowing properly through both tubes .
6 . Hold two bags together, place one tube in each bag and pull
trigger for six to eight seconds .
7 . Weigh bags separately . always divide the weight of (B)
into the weight of (a) . If the ratio is too high increase
the pressure of the “B” tank, and if the ratio is too
low increase the pressure of the “a” tank .
8 . Most acceptable ratios are 1 .10 to 1 .20 for FROTH-PaK ™
Class a Foam Insulation and 1 .05 to 1 .15 for FROTH-PaK ™
Foam Sealant .
Pressure gauges in line with the regulator. Verify both sides. To verify corresponding
pressures of tanks, install pressure gauges in line with each tank. Perform this task on
the nitrogen inlet valve. Should pressure need to be reduced in a tank, slowly bleed off
pressure. NEVER bleed below 120 psi.
9) Collect items needed for calibration (scale that weighs in
grams or ounces, lunch bags, marker, calculator, pen, writing
pad, petroleum jelly)
dO nOT breathe vapor or spray. Proper PPE and ventilation
are required. See product SDS and Section 2 of this manual for
further information. Follow all precautions for product.
10) Pressurize the system .
a) Fully open the valve on the nitrogen bottle .
b) Ensure the tank has at least 500 PSI pressure on
the main tank pressure gauge . If at or below this, order
a new tank . Do not operate under 300 PSI .
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