RS COMPACT FREEZE TUNNEL, Руководство по эксплуатации и обслуживанию

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OPERATION & MAINTENANCE MANUAL
CompactFreezer
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3.7. INJECTION HEADERS
Each assembly feeds the cryogen through the top of the box down into the center of a freezer module.
Each drop can control injection of LN2 into either one or two modules through the use of extension
headers. A single module drop supplies liquid nitrogen to the right or left side extension piping with
cross pipes of nozzles to be fed from both sides with liquid. The nozzles are threaded into the cross
piping for replacement with plugs where nozzles are not required.
Nozzles are added, or removed and replaced with pipe plugs, to control the total amounts of liquid
nitrogen injected into the modules.
Those drops that require the use of extension headers have piping run to either the preceding or
following module with a duplicate header system in those modules. For optimal freezing capacity, the
Compact Freezer tunnel could have LN2 injection headers in each module, but not in the first and last
modules of the assembly, unless efficiency is to be sacrificed.
3.8. TEMPERATURE CONTROL SYSTEM
The Compact Freezer® tunnel freezer utilizes one or more RTD type (Resistance Temperature Device)
electronic temperature controllers to operate each LN
2
drop assembly. Stainless steel sheathed platinum
type sensor(s) extend down through the apparatus box(es) above the freezer module down into the
module(s) itself. The sensor should extend exactly 1
‐1/2” into the module for accurate temperature
sampling of the gaseous medium.
The temperature controller(s) is mounted on the cover of the main control cabinet.
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