Taylor-Wharton Microbulk Tanks - Manual (Page 18)

TW-407 Rev.-
16
These instructions are for operators experienced with cryogenic equipment. Before operating this
product, become familiar with the safety precautions in this manual and in reference publications.
Know the location and function of all components.
Filling by Pressure Transfer
Filling by pressure transfer is accomplished by lowering the pressure in the MICRO BULK below that
of the source vessel. Typically the source vessel is a truck-mounted vessel. The pressure is reduced in
the MICRO BULK by venting gas through the vent valve (V-2). Liquid is pushed by pressure from the
truck-mounted vessel and into the MICRO BULK.
A cryogenic transfer hose equipped with a relief valve and dump valve should be used to connect the
MICRO BULK to the fill connection. Follow the instructions below to fill by pressure transfer:
When liquid issues from the vent valve, the vessel is full. The designed gas head space will remain
above the liquid.
Once liquid stops issuing from the vent valve (V-2), close the vent valve.
Close the liquid source supply valve.
Disconnect the transfer hose from the Fill connection (CN-1).
Filling by Pump Transfer
When a pump is used to fill the container, the pump / top fill connection (CN-1) should be used. Closely
monitor the vessel pressure during the fill. If the vessel pressure approaches the relief valve setting
or the pump pressure rating, shut down the pump. Open the vent valve (V-2) to reduce pressure as
needed.
When using a traditional pumping system, the vent valve (V-2) should remain open during the fill. Monitor
the product exiting the vent valve closely. When liquid issues from the vent valve (V-2) immediately
stop the pump. Once liquid stops issuing from the vent valve close the vent valve.
CAUTION: Follow the safety precautions at the beginning of this manual. Accidental contact with
liquid or cold gas can occur during filling.
OPERATIONS