Determine Proper Fill Weight
1. Visually inspect the container. Do not attempt to fill containers with broken or missing
components.
2. Move the container to a filling station scale and weight it both with and without the fill
hose attached to determine the weight of the fill line assembly. The difference is the fill
line weight.
3. To determine the weight at which the fill should be stopped, add the desired filling
weight (from the table below), the transfer line weight, and the Tare Weight from the
container’s data plate.
FILLING WEIGHTS
XL-45
XL-50
XL-55
ARGON
471 lb. (214 kg)
505 lb. (229 kg)
551 lb. (250 kg)
NITROGEN
273 lb. (124 kg)
293 lb. (133 kg)
319 lb. (145 kg)
OXYGEN
388 lb. (176 kg)
416 lb. (189 kg)
454 lb. (206 kg)
Pressure Transfer Filling Method
Filling a liquid cylinder using the pressure transfer method is common for 22 psig (1.5 bar/
152 kPa) service where the product is used for refrigerant purposes. This method may
also be used for higher pressure cylinders to increase liquid holding time. A fill is accom-
plished by first establishing a pressure difference between the source vessel and the XL-
45/50/55 (higher pressure at the bulk vessel). The pressure differential will then push the
liquid from the storage vessel to the container being filled. This method is employed when
no transfer pump system is available, or if a greater control over liquid temperature is
desired.
Filling the container is accomplished through the LIQUID valve while the VENT valve is
open or partially open to control product pressure. Careful control of pressure will control
the amount of heat retained in the liquid. Lower pressure results in colder liquid trans-
ferred to the container and increases, or lengthens, product holding time.
Pressure Transfer Filling Procedure (Low Pressure Source)
- Once you have deter-
mined the proper full weight for a container, connect a transfer hose to the LIQUID fitting
from a low pressure source of liquid.
1. Open the supply valve. Then, on the XL-45/50/55, open the LIQUID and VENT valves to
begin the fill.
NOTE:
The weight calculation
includes the weight of
residual liquid and is
applicable to both
Pressure Transfer and
Pump Transfer filling
methods.
WARNING:
Filling operations
should take place only
in well ventilated
areas. Accumulations
of product gas can be
very dangerous (refer
to the safety
precautions in the
front of these
instructions.) Maintain
adequate ventilation
at all times.