Taylor-wharton XL-55HP (with dual regulators) Manuel d'utilisateur télécharger pdf (Page 10)

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-45HP/50HP/55HP/50VHP, 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

service.

3. When full weight is reached, close both the LIQUID and 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 remove the container from the scale.

Pump Transfer Filling Method

When a pump is used for filling liquid containers, the fill may be accomplished through

either the VENT valve or the LIQUID valve. Filling through the VENT valve recondenses

gas in the area over the liquid in the cylinder and reduces product loss during the fill. This

method will also result in 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 gas 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 kPa0, 350 psig (24 bar/2413 kPa)

or 500 psig (34 bar/3447 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 previ-

ously 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 (where 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-45/50HP/55HP/50VHP are designed to transfer

specific liquefied gases to, or from, the containers. These accessories are comprised of a

Fill Tee Assembly and a Fill Hose. Cryogenic transfer hoses are constructed of stainless

steel for the transfer of cryogenic liquids, and are available in four or six feet (1.2 or 1.8 m)

lengths with a 3/8 in. NPT fitting on one end and CGA service-specific female fittings on

the other. A Fill Tee Assembly consists of a cross fittings 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/483 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

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 25 26

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Taylor-wharton XL-55HP (with dual regulators) Manuel d'utilisateur Page 10

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