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NORHOF N2 Cold Gas Supply System #855 Series

Norhof manufactures N2 cold gas supply systems. Nitrogen (LN2) is used as the cooling medium and is taken from a storage vessel (Dewar) with low pressure (max. 300 mBar) and delivered (pumped) through a line to the application in a gaseous cold flow.

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Product Specification

Controllable N2 Cold Gas flow up to 60 liter / minute;
Several N2 Cold Gas control possibilities:
Pressure control;
PID temperature control with one temperature sensor;
Software monitoring

Technical Specifications

Static evaporation rate	< 0,5 liters per day
Flow rate	adjustable from 0.01mBar to 270 mBar (by potmeter on pump) == up to 60 liter / minute (with a fill line of 2 meter and 6.6 mm ID)
Maximum working pressure	< 300 mBar
Reaction time	+/- 1 minutes for cooling down the fill line (with 2 meters fill line)
Power connection	115V / 230V AC with supplied power supply or 24 Volt DC
Power consumption	average 125 Watts, during pumping 250 watts
Storage container volume	50 Liter	100 Liter
Outside dimensions (diameter)	500 mm	500 mm
Height dimensions	875 mm	1235 mm
Weight (empty, full)	17 / 57,5 kg	32 / 113 kg
Standard fill line	9.6 mm OD, 6.6 mm ID PTFE tube, with 32mm foam insulation
System includes	Dewar, pump, fill line 2.00 m, power supply, cables, 2 level sensors,PC software.
Working modes	#855, working mode 1 to 7 for control
External control	#855, 5 volt signals for ON, OFF and RS232 signals for ON, OFF
PC software	Monitor software, to monitor pump behavior, and for some working modes to adjust some parameters.
Alarms/warning acoustical/ visual / mechanical	Dewar empty, Dewar 5 liters LN2 left, broken sensor(s), frozen alarm, mechanical overpressure protection valve.
Options	Transport trolley 5 wheels (10 cm height) Stand for pump (when Dewar is refilled) Custom built adaptor to fixate sensor(s) on application

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