Liquid Withdrawal Device
The Liquid Withdrawal Device (LWD) provides 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.
