Dow FROTH-PAK Refill Systems - Manual (Page 30)

dow Building Solutions
Section 12
Ratios and Output
*Using cone type nozzle with chemicals at 75°F (24°C). Do not increase pressure over
225psi. PRV set @ 250psi.
nOTe: Checking the system output and chemical ratio can determine whether the
system is in good operating condition. A system blockage for example, is indicated
by an abnormally low output. Checking the ratio can indicate whether the problem is
related to the “A” or “B” side. The ratios and outputs for other products are similar to the
results listed above. However, temperatures lower than 65°F (18
° C) or a faulty pressure
gauge on the nitrogen regulator assembly may cause substantial deviation.
Section 13
Anti-crossover Nozzles
The Dow Chemical Company provides various anti-crossover nozzles
with various spray patterns for use with the InSTa-FlO™ Gun . For best
results, operate the InSTa-FlO Gun between 6 and 36 inches from
the surface being sprayed . Move the InSTa-FlO Gun in a steady but
relatively slow back and forth motion . This will provide an even coverage .
Do not spray over rising foam .
The cone type nozzle provides a round spray pattern for multiple
applications and surfaces .
The fan type nozzle provides a fine fan spray pattern resulting in a
smooth foam surface (paint spray finish) .
The caulking type nozzle provides a bead pattern for ultra fine coverage
and has less overspray .
Refer to InSTa-FlO Gun and anti-Crossover nozzle drawings, pages a3-a4 .
Section 14
Nitrogen Regulator
14 .1 Important - Safety Information
1 . neVeR use regulators on cylinders of which the gas
pressure exceeds 3000 pounds per square inch
2 . nEVER set chemical tank pressure over 225psi .
3 . nEVER use oil or petroleum base grease on regulator,
inlet connection, or cylinder valve . an explosion or
fire could result . The lubricant used on this regulator
adjusting screw is Dow-Corning no . 44 silicone grease
which is a non-petroleum base grease .
4 . nEVER stand in front of, or behind a regulator while
opening the cylinder valve .
14 .1 .1 Instructions
1 . Before attaching the regulator to the nitrogen cylinder valve
outlet, open the valve for a few seconds, allowing the
gas to force out any possible foreign matter .
2 . attach the regulator to the nitrogen cylinder valve and
tighten the inlet nut securely with an adjustable wrench .
3 . Before opening the cylinder valve, turn the adjusting
screws (valve stems) to the left until no tension is felt .
nOTe: NEVER open cylinder valve until spring tension on the valve
stems have been released.
4 . Open cylinder valve slowly . DO nOT stand in front of
or behind regulator while opening the cylinder valve .
5 . Turn valve stems clockwise until the low pressure gauge
registers the desired working pressure .nitrogen Regulators
are available through The Dow Chemical Company or:
airgas north Central Inc .
1250 W . Washington Street
West Chicago, Il 60185
Phone: (630) 231-9260
Refer to nitrogen Regulator assembly drawing, page a-2 . The regulator is not pressure
releasing - turning the regulator to a lower psi will not reduce pressure in the tank until the
pressure is manually vented .
density PSi (A / B) nominal
Output*
nominal Ratio
(A : B)
1.75 120 / 120 3.6 lbs/min 1.0 : 1.0
1.75 140 / 140 4.0 lbs/min 1.0 : 1.0
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