Dow FROTH-PAK Refill Systems - Manual (Page 16)

dow Building Solutions
Section 3
System Installation
nOTe: Dry nitrogen is used for pressurizing the Refill System and is not supplied.
It may be obtained for a nominal rental charge from any local welding supplier.
Order standard size (industrial grade) cylinder with CGA 580 nitrogen fitting.
Refer to FROTH-PAK™ Refill System Installation drawing, page A1.
3 .1 Initial Tank Set-up
1) Be sure that the tanks are at the optimum temperature of
70 –80 degrees F ., minimum 60–65 degrees . If they are
below this range, utilize heating blankets or a box heater to
bring them up to the proper range . This is very important!
Consult your Dow Rep or Dow Technical Service if you
need assistance .
2) Color code all hoses with electrical tape (the nitrogen and
chemical transfer hoses, as well as the gun) red for the a Side
(ISO) and blue for the B Side (Polyol) to prevent chemical cross
contamination . Place colored tape at each end of the hoses for
proper identification .
3) attach the nitrogen regulator to nitrogen tank .
a) Order a five (5) foot high nitrogen tank . at this height the
regulator is much easier to view .
b) Make sure nitrogen regulator handles are all turned out
(counterclockwise) until they cannot be turned any more .
This is the closed position .
c) Hand tighten the regulator to the tank and level the regulator
for easy viewing purposes .
d) Once level, fully tighten regulator with an adjustable wrench .
You will need about 30 lb-ft of force . Do not over tighten .
4) attach the nitrogen hoses to the nitrogen regulator .
a) Remove the two protective caps from the nitrogen tank
regulator where the hoses will be connected .
b) The a side (red) should be on the operator’s left side as you
are facing the nitrogen tank/regulator . attach red/yellow-
coded nitrogen hose to the regulator with about 30 lb-ft of
force . Do not over tighten .
c) note that all the hose connections are flare fittings . These
do not require any sealant or Teflon tape . They just need to
be tight .
d) The B side (blue) should be on the operator’s right side as
you are facing the nitrogen tank/regulator . attach blue/
yellow-coded nitrogen hose to the regulator with about
30 lb-ft of force . Do not over tighten .
5) attach the nitrogen hoses to the chemical tank .
a) Remove cap covers from chemical tank connection on the
a side (red) and attach nitrogen hose to the flare fitting on
the valve that is in a vertical position (pointing straight up) .
Tighten to about 30 lb-ft of force . Do not over tighten .
(Save the cap covers for when the tanks are returned
to Dow .)
b) Remove cap from chemical tank connection on the B side
(blue) and attach nitrogen hose to the flare fitting on the
valve that is a vertical position (pointing straight up) . Tighten
to about 30 lb-ft of force . Do not over tighten . (Save the
cap covers for when the tanks are returned to Dow .)
6) attach the filters to the chemical valve connections .
a) Remove the chemical valve plug on the a side (red) . Save
the plug for return shipment to Dow, just leave inside
the ring on the top of the tank . On the a side only, it is
necessary to clean the petroleum jelly from the inside of the
valve with a cotton swab . (If you don’t have cotton swabs,
take the small cloth bag that the filter came in and wrap it
over the end of a screwdriver . use this to clean the petro-
leum jelly out of the valve .) next, connect the filter with the
arrow (arrow is engraved on the valve) flowing out or away
from tank and tighten to about 30 lb-ft . note that the filter
is pipe thread and DOES need sealant or Teflon tape . It
should be taped from the factory but just check to be sure .
b) Remove the chemical valve plug on the B side (blue) from
the chemical tank . Save the plug for return shipment to
Dow, again just leave it in the ring on the top of tank .
Connect filter with arrow (arrow is embossed on the valve)
flowing out or away from tank and then tighten to about
30 lb-ft . again, this is pipe thread and DOES require seal
ant or tape . Do not over tighten .
7) attach the ball valves to the chemical filters .
a) at the end of the filter, attach a ball valve . Tighten both
ball valves on the a and B side to about 30 lb-ft but do not
over tighten . again, this is pipe thread .
8) attach the chemical hoses to the ball valve on the chemical
tanks .
a) attach the a side (red) hose to the a side ball valve and make
sure to keep the ball valve in the upward position and in the
closed position . Tighten to about 30 lb-ft . Do not over
tighten .
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