Operations, Withdrawing product, Withdrawing liquid – Taylor-Wharton Microbulk Tanks User Manual
Page 19: Changing gas service, Withdrawing product 17, Withdrawing liquid 17, Changing gas service 17
TW-407 Rev.-
17
Withdrawing Product
External Vaporizer
To withdraw product from the MICRO BULK, connect a suitable vaporizer to the vaporizer inlet con-
nection (CN-4). Equip the vaporizer with a relief valve sized in accordance with the vaporizer manufac-
turer’s recommendations. Install a line regulator downstream of the vaporizer. Connect the outlet of
the regulator to the application. Follow these steps:
1.
Open the pressure building valve (V-6). Monitor the pressure gauge (PI-1). When the pressure ex-
ceeds the desired delivery pressure, continue.
2.
Open the vaporizer inlet valve (V-4).
3.
Adjust the line regulator to desired delivery pressure.
Withdrawing Liquid
Attach a transfer hose from the receiver vessel to the MICRO BULK liquid connection (CN-3) and open
the adjacent liquid valve (V-3). The pressure in the container will drive liquid product out through the
valve as long as the container pressure exceeds that of the receiver.
Changing Gas Service
The MICRO BULK changed for the following gas only; argon, oxygen, or nitrogen service. A tank that
has been used for CO
2
cannot be switched to another service. Follow these steps to properly change
gas service:
1
Safely empty all liquid from the container.
2
Open the pressure building inlet and outlet valves (V-6 and V-7) and the vent valve (V-2) to vaporize
any residual liquid that may remain in the bottom of the vessel. It may require an hour or longer to
vaporize all the residual liquid.
3
To ensure purity, it is recommended that the MICRO BULK be evacuated with a suitable vacuum
pump. The ultimate vacuum reading should be at least 20 inches
of mercury.
4
Replace the fittings for the liquid, top fill, and use connections with the appropriate fittings shown
in the chart below. Use Teflon tape or another suitable thread sealant when threading the fittings
into the connections.
5
Remove any decals identifying the previous gas service. Attach new gas service identification
decals.
Before disconnecting fill hose from fill connection (CN-1) open fill purge valve to discharge product
from fill hose. After this operation is complete close fill purge valve then disconnect hose from (CN-1).
OPERATIONS