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Introduction

The container consists of an inner stainless steel cylinder securely supported in an outer jacket shell. The space between the inner and outer vessels contains a highly efficient insulation material and is evacuated.

Safety Devices

A relief valve, and a rupture disc protect the inner liquid reservoir, both located on the manifold.

A combination evacuation valve and relief device is provided to service the vacuum space. This protects the container in the event of a leak in the inner reservoir. If this device vents, contact Cryofab; do not attempt to use the container or re-evacuate the insulation space.

Gauges

A pressure gauge is provided indicating inner vessel pressure. A liquid level gauge is provided to indicate approximate container contents.

Handling

These containers are designed for use in the upright position and should not be laid on their side. If a container must be lifted, use a forklift or similar device beneath the base, or hoist by means of the lifting slots in the halo ring struts. Do not attempt to lift by the handles or by means of slings around the shell.

Filling

These containers can be filled from a pressurized liquid source using the following procedure: Connect the liquid source to the fill/withdrawal valve (labeled liquid) using a suitable transfer line. Open the vent valve (labeled vent) and the fill/withdrawal valve. To begin the transfer, open the liquid source valve. Keep the container pressure below the relief valve setting during filling. Throttle the flow from the liquid source if necessary.

WARNING

A cold stream of gas and/or liquid will exit from the vent valve. Keep clear of exiting stream.

When the container is filled to maximum capacity, liquid will start to exit from the vent valve. At that point shut off the liquid source valve. Disconnect the transfer line and shut the fill/withdrawal and vent valves.

Withdrawal

Transferring liquid from the container is accomplished by the following procedure. Be sure the vent valve is closed and check the pressure gauge to see that the vessel pressure is adequate for the intended application. If additional pressurization is required introduce room temperature gas, of the same composition as the contents, through the vent valve. The gas should be supplied at a pressure no greater than the relief valve setting.

Attach a suitable transfer line to the fill/withdrawal valve. Open the fill/withdrawal valve as far as necessary to obtain the desired flow rate. When the transfer is complete, close the fill/withdrawal valve and disconnect the transfer line.

Changing Service

Although these containers can be supplied from the factory for LN2, LARG or LOX service, do not attempt to change the service for which the container was originally supplied without consulting the factory.