Liquid nitrogen container Withdrawal Device
The Liquid Withdrawal Device (LWD) gives convenient pressure transfer
to liquid nitrogen from containers & dewars. The device clamps
directly to the special neck flange that is found under the plastic trim
collar around the neck of these containers. Flow rates up to 8 liters
per minutes are possible at operating pressures up to 10 psig (0.7
bar/69 kPa). Liquid can be dispensed directly from the LWD via the spout
provided, or through a standard cryogenic hose connected to the liquid
outlet. Filling a Dewar is accomplished by pressure transfer through the
withdrawal device-This filling method allows replenishment of the
liquid supply in the dewar without removing the LWD while keeping the
liquid saturated at a pressure sufficient to sustain liquid withdrawal.

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