Taylor-Wharton LP3 - Manual (Page 15)

CAUTION: Follow the safety precautions at the beginning of this manual. Accidental contact with liquid or
cold gas can occur during filling.
A cryogenic transfer hose equipped with a relief valve and dump valve should be used to connect the Laser
Pak III to the liquid source. Follow the instructions below to fill by pressure transfer:
1.
Determine the proper fill weight following the instructions in the previous section.
2.
Visually inspect the Laser Pak III, transfer hose, and bulk tank piping. Do not attempt to fill the
Laser Pak III if any components are broken or missing.
3.
Connect a transfer hose from the bulk tank to the liquid connection (CN-4).
4.
With the Laser Pak III on a suitable scale, open the bulk tank supply valve. Open the liquid valve
(V-7) and vent valve (V-4) to begin the fill.
5.
Closely monitor the indicated weight. When the proper fill weight has been reached, close the
liquid valve (V-7) and the vent valve (V-4).
6. Close the liquid source supply valve and open the transfer hose dump valve.
7.
Disconnect the transfer hose from the liquid connection (CN-4).
Filling by Pump Transfer
When a pump is used to fill the container, the pump / top fill connection (CN-1) should be used. Place the
unit on a suitable scale. Determine the proper fill weight as explained in the section above. Closely monitor
the vessel pressure and indicated weight during the fill. If the vessel pressure approaches the relief valve
setting (500 psi) or the pump pressure rating, shut down the pump. Open the vent valve (V-4) to reduce
pressure as needed. When the proper fill weight has been achieved, shut down the pump.
When filling using the Taylor-Wharton Express truck in automatic mode, the fill is stopped at a level
providing an adequate gas head space. However, if the container is to be transported by road, the fill should
be accomplished by weight.
Withdrawing Gas
To withdraw gas from the Laser Pak III connect a suitable line regulator to the gas withdrawal connection
(CN-2). Connect the outlet of the regulator to the application. Follow these steps:
1.
Close the isolation valve (V-6) for the 22 psig relief valve (SV-3) if it is open.
2.
Open the pressure building valve (V-3). Monitor the pressure gauge (PI-1). When the pressure
exceeds the desired delivery pressure, continue.
3.
Open the gas withdrawal valve (V-5).
4.
Open the vaporizer isolation valve (V-2) if it is closed.
5.
Adjust the line regulator to desired delivery pressure.
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