User guide
Dow Building Solutions
Section 17
Warranty
The Dow Chemical Company warrants only that the product shall meet
its specifications. This warranty is in lieu of all other written or unwrit-
ten, expressed or implied warranties and The Dow Chemical Company
expressly disclaims any warranty of merchantability, or fitness for a par-
ticular purpose. The buyer assumes all risks as to the use of the material.
Buyer’s exclusive remedy as to any breach of warranty, negligence or
other claim shall be limited to the refund of the purchase price of the
material. Failure to strictly adhere to any recommended procedures
shall release The Dow Chemical Company of all liability with respect to
the materials or the use thereof. The information herein is not intended
for use by non-professional designers, applicators or other persons
who do not purchase or utilize this product in the normal course of
their business.
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. Water carried
within the polyol hose to the point where blending with
isocyanate occurs must be avoided.
Polyol Hose:
The polyol hose is terminated at each end with Parker Series 55¼” JIC
Female Swivel fittings (carbon steel or stainless steel only). Blue 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.
To replace the internal hose or hoses:
1. Close chemical tank valves, and tank on-off valve.
2. Close nitrogen valves and relieve system nitrogen pressure.
3. Carefully and completely bleed the chemical from
lines through the INSTAFLO Gun into separate
appropriate waste containers by activating one
hose at a time.
4. Lay the hose reasonably straight with the hook-and-
loop seam upwards, as this will greatly help the hose
exchange. Unfasten the jacket from around the hoses
by parting the hook-and-loop strips which hold the
jacket in place. This is most easily accomplished with
two or more people.
5. Verify there is no pressure remaining in the hoses and
that the tank valves are closed. Lay the new hose along
the old one in the open jacket. Cover the connections
of the old hose with a rag and remove the hose from
the tank end. Cap the old hose to reduce potential for
spillage. Connect the new hose to the tank end.
6. Repeat the procedure, using a rag, for the dispenser
end of the hose.
7. Remove the old hose from the jacket by clipping the
cable ties and lifting it away. Discard the old hose
using an appropriate waste stream as you would for
other polyurethane waste products.
8. Re-tie the new hoses about every ten feet to each other
using cable ties. This helps in handling and coiling the
hose later.
9. Re-close the hook-and-loop strips, bringing the heated
jacket up evenly around the paired hoses.
10. Re-establish the system to the operational state using
the installation, pressurization, calibration, and other
procedures found in this manual.
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