Specifications

11
OPERATION OF DURA-CYL MCR 160 /180 / 200 / 230 / 265 HP
40
Operating Pressure
The liquid cylinder will automatically maintain a normal
operating pressure between the pressure building por-
t
ion of the regulator (300 psi- 20.7 bar) and the
economizer portion of the regulator (325 psi- 22.4 bar).
The operating pressure can be set up or down by sim-
ply adjusting the regulator while watching the
pressure gauge. The adjustment range of the regula-
tors is between 150 and 350 psi (10.6 & 24.1 bar).
The gas delivery pressure should not be confused with
the vessel operating pressure. The delivery pressure
should be adjusted with a separate regulator that is at-
tached to the gas withdrawal fitting (Item 141).
Liquid CO
2
Withdrawal
Liquid can be withdrawn from these liquid cylinders in
the same manner that was described in section 8.0
Cryo-Cyl LP, however the transfer of liquid carbon
dioxide is slightly different and should follow this
procedure:
1. Connect the transfer hose to the liquid valve fit-
ting (Item 127) of the high pressure liquid
cylinder.
2. Connect the other end of the hose to the receiv-
ing equipment.
3. Open the pressure building valve (Item 126) and
wait for the pressure gauge (Item 120) to reach
the operating pressure (300 psi- 20.7 bar).
4. Refer to the receiving equipment manual for
procedures to open the fill valve and vent valve
of the receiving equipment.
5. Open the liquid valve on the liquid cylinder. This
valve can be adjusted to obtain the proper liq-
uid flow rate and delivery pressures.
6. Adjust the receiving equipment vent valve and
the fill valve to maintain pressure in the fill hose.
The equipment and the hose must maintain
pressures above 70 psi (4.8 bar) during the
transfer. Liquid CO
2
will turn into dry ice at lower
pressures.
7.
When the transfer is complete close the receiving
equipment's valve. Close the liquid valve on the
cylinder and relieve pressure from the hose.
8. Disconnect or remove the hose from the receiving
equipment.
CAUTION:
The liquid and vent valves on high pressure
liquid cylinders should always be kept closed to protect
the inner vessel and plumbing from being contaminated.
Gas Withdrawal
The high pressure liquid cylinder will deliver gas at various
flow rates and temperatures (shown in Figures J1 &
K – page 13) for different applications. The flow rate
is controlled by the equipment that is being supplied
gas by the liquid cylinder. The continuous flow rate
(shown in specification on page 14-16) indicates the
flow rate that will normally provide gas at a reasonable
temperature and should not be exceeded. Higher flow
rates may provide very cold gas that could damage
the equipment attached to them.
To supply gaseous product follow this step by step
procedure:
1. Connect the proper regulator to the liquid cylin-
der's gas use outlet (Item 141).
2 Connect the proper hose between the liquid
cylinder gas use regulator and the receiving
equipment.
3. Open the pressure building valve (Item 126).
4. Allow pressure (refer to gauge Item 120) to build
to the operating pressure (300 psi- 20.7 bar).
5. Open the gas use valve (Item 125).
6. Adjust the gas use regulator for the proper
delivery pressure.
7. When the gas delivery is completed, close all
liquid cylinder valves.
CAUTION: The liquid and vent valves on an empty
liquid cylinder should always be kept closed to pro-
tect the inner vessel and plumbing from being
contaminated.
Service and Maintenance
Refer to section 15 and 16 of this manual to trouble
shoot problems and service these liquid cylinders.