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-65/65HP, open the LIQUID and VENT valves to
begin the fill.
2. During the fill, monitor the container pressure and maintain a pressure of 10-15 psig
(0.7-1 bar/69-103 kPa) by throttling the VENT valve. Not for CO
2
service
3. When full weight is reached, close both the LIQUID and the VENT valves.
4. Close the liquid supply valve and open the dump valve on fill line assembly.
5. Disconnect the fill line from the container and removed the container from the scale.
Pump Transfer Filling Method
When a pump is used for filing liquid containers, the fill may be accomplished through
either the VENT valve of the LIQUID valve. Filling though the VENT valve recondenses gas
in the area over the liquid cylinder and reduces product loss during the fill. This method
will also result in the liquid near the saturation temperature of the supply vessel. Filling
through the LIQUID valve may provide colder liquid and longer holding time before the
liquid warms to the point where venting begins, but will require more frequent venting and
greater product loss.
Pump Transfer Filling Procedure -
This method applies only to containers in gas
service that are equipped with a 230 psig (16-bar/1586 kPa) or 350 psig (24-bar/2412 kPa)
relief valve. Liquid is admitted through the VENT valve and recondenses gas in the head
space during the fill. The fill line is connected from the liquid supply to the VENT valve on
the cylinder. Both the fill line and the container should be pre-cooled prior to beginning the
fill process. Proper full weight is determined by the previously explained method.
1. Open the supply valve. Then, on the container being filled, open only the VENT valve to
begin the fill. Start the pump at this time.
2. Observe the container pressure closely. If the pressure approaches the relief valve
setting (or the pump pressure rating) stop the fill process at the supply, and open the
fill line dump valve to vent excess pressure. As soon as the pressure has dropped to a
level that will allow you to resume the fill, close the dump valve and restart the pump (or
reopen the supply valve.)
3. When full weight is reached, close the VENT valve. Stop pump (when applicable),
close liquid supply valve and open the dump valve on fill line assembly to vent trapped
liquid.
4. Disconnect the fill line from the container and remove the container from the scale.
Fill Hose Kits
Taylor-Wharton fill hose kits for the XL-65/65HP are designed to transfer specific liquefied
gases to, or from, the containers. These accessories are comprised of a Fill Tee Assem-
bly and a Fill Hose. Cryogenic transfer hoses are constructed of stainless steel for the
transfer of cryogenic liquids, and are available in four of six-ft. (1.2 or 1.8 m) lengths with
a 3/8 in. NPT fitting on one end and a CGA service-specific female fittings on the other. A
Fill Tee Assembly consists of a cross fitting with a CGA end fitting, relief valve and manual
dump valve.
CAUTION:
With carbon dioxide,
pressure in the
container being filled
must be above 70 psig
(4.8 bar/482 kPa)
before the fill begins
and at all times during
the fill to prevent the
product from freezing
into dry ice.
Pump Transfer Liquid
Fill Through Vent Valve
Pressure Transfer
Filling From a Low
Pressure Source
