180 liter LN2 Supply Tank 4-3
Thermo Scientific
Section 4
Operation
The liquid cylinder will maintain a normal operating pressure of 22 psig
(1.5 BAR). Normal liquid withdrawal operations are performed at lower
pressure to reduce flash-off losses and splashing. Transfer of liquid at
higher pressures can lead to excessive splashing of the cryogenic liquid
which could result in burns to the operator and/or nearby personnel. All
personnel should be fully instructed in the cautions associated with
handling cryogenic fluids and the proper clothing and protective gear to be
used.
Cryogenic liquid can be pressure transferred from the liquid cylinder to
other cryogenic equipment that operates at a lower pressure than the liquid
cylinder. To make a liquid transfer, follow this procedure:
Warning
Before making a liquid transfer, be sure that protective eyeglasses
and gloves are being worn. If the transfer is being made to an open top
vessel, the transfer pressure should be as low as possible and a phase
separator should be used to eliminate splashing and hose whip.
1. Connect the transfer hose to the liquid valve (Item 1) of the cylinder.
2. Connect or place the other end of the hose onto the inlet of the
cryogenic equipment that will receive liquid. Atmospheric dewars are
filled with a phase separator mounted to the open end of the hose.
3. Refer to the receiving equipment manual for procedures to open the
fill valve and vent valve of the receiving equipment.
4. Open the liquid valve (Item 1) on the liquid cylinder. This valve can
be adjusted to obtain the proper liquid flow rate.
5. When the transfer is complete, close the receiving equipment's valve.
Close the liquid valve (Item 1) on the cylinder and relieve pressure
from the hose.
6. Disconnect or remove the hose from the receiving equipment.
Note
Filling weights are shown as the
maximum weight recommended by code.
Their related volumes may vary with
product density.
* Relief valve setting at 22 psig (1.5 BAR)
Operating Pressure
Liquid Withdrawal
Filling Weight Table
MODEL*
Cryo-Cyl 180LP
NITROGEN
327 lbs. (148 kg)
OXYGEN
465 lbs. (211 kg)
ARGON
573 lbs. (260 kg)
