Taylor-wharton XL-55 Manuel d'utilisateur télécharger pdf (Page 10)

2. During the fill, monitor the container pressure and maintain a pressure of 10-15 psig

(0.7-1 bar/69-103 kPa) by throtting the VENT valve.

3. When the full weight is reached, close both the LIQUID and VENT valves.

4. Close the liquid supply valve and open the dump valve on the 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 beings, 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) 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 dump 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-45/50/55 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 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 fitting on the other. A Fill

Tee Assembly consists of a cross fitting with a CGA end fitting, relief valve and manual

dump valve.

In use, the CGA Tailpiece couples to the fill connection on the container being filled. The

Relief Valve vents pressure over 350 psig (24 bar/2413 kPa) that builds up in the fill line

due to trapped liquid. The Dump Valve is used to allow the operator to blow-down the

receiving container during a pump fill, or to relieve residual pressure from expanding liquid

trapped in the line before disconnecting the fill line.

Pressure Transfer

Filling From a Low

Pressure Source

Pump Transfer Liquid

Fill Through Vent

Valve

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 24 25

Commentaires sur ces manuels

Pas de commentaire

Taylor-wharton XL-55 Manuel d'utilisateur Page 10

Commentaires sur ces manuels

Produits connexes et manuels pour Équipement Taylor-wharton XL-55