CHART Cryo-Cyl80HP, Product Manual

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17
Operations Product Manual - Liquid Cylinders
The liquid cylinder is equipped with liquid and vent valves
that are used during the filling procedure. The liquid valve is
equipped with a dip tube that extends into the inner vessel of
the cylinder and reaches to the bottom The vent valve has a
vent tube attached to it that also extends into the inner vessel
of the cylinder. This vent tube is designed to spray the liquid
into the top of the vessel so that pump filling through the
vent valve will keep head pressure down in the cylinder.
Filling can be accomplished by either pressure transfer or
pump fill. Follow these steps for filling Dura-Cyl MCR MP
liquid cylinders:
1
Sample the residual gas that is in the cylinder. Purge the
cylinder if necessary to ensure 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 liquid valve 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 filling table (i.e. Dura-Cyl 160 MP for
oxygen at 230 psi / 16 bar has a product weight of 379
pounds / 172 kg).
5
Open the cylinder vent and liquid valves. Open the
transfer line shut-off valve to begin the flow of product.
6
When the scale reads the calculated total filling weight
turn off the liquid valve on the cylinder Close the vent
valve
7 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 Dura-Cyl MCR MP liquid cylinder will automatically
maintain a normal operating pressure between the pressure
building portion of the regulator (125 psi / 8.6 bar) and the
economizer portion of the regulator (140 psi / 9.7 bar). The
operating pressure can be set up or down by simply adjusting
the regulator while watching the pressure gauge. The
adjustment range of the regulators is between 50 and 175 psi
(3.4 and 12.1 bar).
The gas delivery pressure should not be confused with the
vessel operating pressure. The gas delivery pressure should
be adjusted with a separate regulator that is attached to the
gas withdrawal fitting.
Gas Withdrawal
The Dura-Cyl MCR MP liquid cylinder will deliver gas at
various flow rates and temperatures for different applications.
The flow rate is controlled by the equipment that is being
supplied gas from the liquid cylinder. The continuous flow
rate 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 that they are attached to. To supply gaseous
product follow this procedure:
1
Connect the proper regulator to the liquid cylinder’s gas
use outlet
2
Connect the proper hose between the final line regulator
and the receiving equipment.
3
Open the pressure building valve.
4
Allow pressure to build to the operating pressure of 140
psi (9.7 bar).
5
Open the gas use valve.
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 protect
the inner vessel and plumbing
from being contaminated.
Dura-Cyl ® LCCM MP Liquid Cylinders
The Dura-Cyl LCCM MP liquid cylinders have the unique
feature of a combination pressure building and economizer
regulator (Liquid Cylinder Control Manifold). The LCCM
eliminates the need to adjust two regulators when the
operating pressure needs to be changed. The liquid cylinder
is designed to transport, store and deliver liquid oxygen,
nitrogen or argon as a cryogenic liquid or gas The common
application for this liquid cylinder is to provide gas at
pressures around 100 psi (6.9 bar).
The liquid cylinder will build and maintain pressure at the
regulator setting of 125 psi (8.6 bar) the regulator will supply
gas from the tank vapor space (economizer function) to the
receiving equipment which will reduce the cylinder pressure.
A continuous gas flow can be automatically provided from
this cylinder
Liquid can be withdrawn from this liquid cylinder in the
same manner that was described in the Dura-Cyl LP liquid
cylinder section