Specifications

12
OPERATION OF DURA-CYL 160 / 180 / 200 / 230 / 265 HP
45
Filling can be accomplished by either pressure transfer
or pump fill. The following procedure should be used
for pressure transfer fillings, refer to the illustration on
p
age 43:
1. Sample the residual gas that is in the cylinder.
Purge the cylinder (refer to the purging procedure,
page 58) if necessary to insure the proper purity.
2. Place the cylinder on the filling scale. Record the
weight. Compare this weight to the registered
tare weight on the data plate. The difference is
the weight of the residual gas.
3. Connect the transfer hose to the fill valve (Item
173). Record the new weight. The difference
between this weight and the initial weight is the
weight of the transfer hose.
4. To determine the total filling weight add the tare
weight of the cylinder, the hose weight and the
proper filling weight from the table (pg 47). The
table indicates the product across the top and
the relief valve pressure down the side. Connect
the two columns to find the proper weight.
Example: Dura-Cyl 160 HP for Carbon Dioxide
at 350 psi (24.1 bar) has a product weight of
387 pounds.
5. Open the cylinders vent and liquid valves (Item
173). Open the transfer line shut-off valve to
begin the flow of product.
6. If filling CO
2
, adjust the cylinders vent valve to
maintain pressure in the cylinder and fill hose.
The equipment 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 scale reads the calculated total filling
weight, turn off the liquid valve (Item 173) on the
cylinder. Close the vent valve. It is important to
maintain pressure above 70 psi (4.8 bar) if fill-
ing CO
2
or N
2
0. Do not allow the cylinder to
vent down after filling.
8.
Close the transfer line shut-off valve and relieve
the pressure in the transfer line. Remove the
transfer line. Remove the cylinder from the scale.
Operating Pressure
The liquid cylinder will automatically maintain a normal
operating pressure between the pressure building
portion 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 regulators is
between 80 and 320 psi (5.5 and 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
attached to the gas withdrawal fitting (Item 178).
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 fitting
(Item 177) of the high pressure liquid cylinder.
2. Connect the other end of the hose to the receiving
equipment.
3. Open the pressure building valve (Item A) and
wait for the pressure gauge (Item 164) 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 liquid
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.