Installation Polycold Cryochiller
Insulate Exposed Refrigerant Tubes and Couplings Installation and Operation Manual
Brooks Automation
4-44 214072 Revision B
7. Cover the exposed tubes between the pre-insulated refrigerant line and the feed-through with a spi-
ral wrap of Armaflex Insulation Tape. Overlap the previous wrap of insulation tape by at least 1 inch
to ensure there are no gaps.
If using sheet insulation, fit the sheet of insulation onto the exposed tubes. Wrap the insulation
around the exposed tubes three times. Put adhesive on the last 1-1.5 inches (25-40 mm) of the
overlapping sheet to secure it in place.
Seal both ends of the insulation with tape to secure the insulation on to the insulation on the refrig-
erant lines and to the feed-through. Do not put the tape closer than 1-2 inches (25-50 mm) to the
threads on the feed-through.
Figure 4-34: Cutaway View A-A Showing Sheet Insulation on Refrigerant Lines at Polycold Cryochiller
Circuit 1
Refrigerant
Lines
Circuit 2
Refrigerant
Lines
(optional)
Small Diameter
Insulation on
Refrigerant Line
Large Diameter
Insulation on
Refrigerant Line
(with seams offset)
Outer Wrap of
Sheet Insulation or
Armaflex Insulation Tape
on Refrigerant Line Bundle
Figure 4-35: Cutaway View B-B Showing Sheet Insulation on Refrigerant Lines to Cryosurface
Small Diameter
Insulation on
Refrigerant Line
Outer Wrap of
Sheet Insulation or
Armaflex Insulation Tape
on Refrigerant Line Bundle
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