Cryomech LNP-40, Инструкция по установке, эксплуатации и текущему обслуживанию

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Specifications
5-11
N
2
Inlet Coupling
The quick connect coupling attached to the regulator is the inlet port for the gaseous
nitrogen. The flexible, stainless steel nitrogen line (not shown) attaches to the N
2
inlet
coupling.
Level Indicator/Switch
The level indicator/switch monitors and regulates the amount of liquid nitrogen in the
dewar. The level indicator/switch is preset to shut down the system when the dewar is
full. The user can set the liquid nitrogen level, at which the system will automatically
restart.
Standby Light
The standby light will illuminate when the level indicator/switch has shut the system
down.
Dewar Cord Receptacle
Power is supplied to the level indicator/switch by the dewar cord that connects to the
dewar cord receptacle on the dewar and the helium compressor package. The liquid
nitrogen plant will not operate unless the dewar cord is connected to the dewar and the
helium compressor.
Bleed Valve
The bleed valve is used to release the pressure inside the dewar.
Pressure Relief Valves
The primary pressure relief valve will begin to open when the pressure inside the dewar
is approximately 10 PSIG. A secondary 15 PSIG pressure relief valve will activate if the
primary relief valve fails to open.
Burst Disc
The burst disk is an additional safety feature that protects the dewar if both relief valves
fail. The burst disk activates at approximately 50 PSIG.
Extraction Line
Liquid nitrogen is extracted from the dewar by opening the extraction line valve
attached to the vacuum jacketed extraction line. The extraction line connects to an
internal tube that extends to the bottom of the dewar. The positive pressure inside the
dewar pushes the liquid nitrogen out of the dewar.