Dow FROTH-PAK Refill Systems - Manual (Page 33)

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unheated hoses . The only difference here is to make sure
whenever checking the flow or purging an arctic Pak hose
make sure that a grey backed or white backed calibration
nozzle is attached to the gun .
7 . now that chemical is contained within the hoses, turn
the controller to its lowest setting and plug the heater
controller into a standard 110vaC outlet capable of
continuously providing 15 amps of service . as with
any electrical device, care should be taken to keep
the system out of wet areas and to avoid mechanical
damage to the controller, electrical lines, heated hose
jacket, and other electrically charged parts .
8 . Follow Calibration Instructions (Section 4 .2) noting
the exiting chemical temperature, which should be
70°F (21°C) or higher . adjust the controller as needed
to provide the heat desired . This temperature will
depend on ambient conditions, type of application,
and the chemical system being used . let the process
results be your final guide in deciding a set point temperature .
9 . Shut-Down, Re-Start, Tank Change procedures, etc .
are the same as outlined in this manual for standard
unheated hose .
10 . When changing the tanks or whenever leaving the
system unmanned for long periods of time (overnight,
for example), it is good practice to unplug the heater
controller .
11 . When storing the system, and between work sessions,
it is best practice to leave chemical in the hoses, and to
have all valves closed . leaving a hose open, or having
air within the hose will cause crystallization of the
isocyanate and subsequent hose blockage .
16 .3 Spare Parts and Maintenance
The arctic Pak is available as a complete system (hoses, heater jacket
and controller) which is Dow Chemical part number GMID 328507 .
also available for field support from your Dow distributor are the con-
troller (GMID 328509), and replacement heated jacket and controller
combination (GMID 328508) .
an internal replacement chemical hose may be made in the field from
four standard, unheated hoses using standard, steel ¼” JIC Male cou-
plers to join them . Four hoses may be used from two of the standard
hose and Gun Hose assembly Kits, GHa30, which is Dow Chemical
part number GMID 158403 . It is, however, not recommended to heat
these hoses .
alternately, heated replacement hoses to be used inside the jacket
may also be sourced from any Parker Hannifin distributor as follows:
Isocyanate Hose:
The isocyanate hose is terminated at each end with Parker Series
55 ¼” JIC Female Swivel fittings (carbon steel or stainless steel only) .
Red end of hose color coding shall be maintained using colored tape,
or a colored heat shrink sleeve as used in the electrical industry, or by
other means .
Fittings shall be crimped in place using Parker approved tooling and
procedures . The resulting assembly shall be pressure tested at 500
psi without using water internally to the hose assembly .
WARninG: Water reacts aggressively with isocyanate. Reactions within a confined
space such as within a hose may present a safety concern. Even small amounts of
water vapor may cause a blockage or an adverse reaction.
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