New laboratories routinely commission a storage vessel and then discover the supply arrangement behind it takes six weeks to set up. Liquid nitrogen supply is three decisions, and they run in this order.
How nitrogen arrives
Delivered dewars swapped on a schedule, or a bulk tank filled by tanker for larger sites. Which suits you depends on consumption, and consumption depends on the number and size of vessels, how often they are opened, and their evaporation rates. Ask each vessel’s supplier for a static evaporation figure and add a margin for use.
Where it is held on site
A self pressurising supply vessel earns its place here. The CryoFill Series runs from 100 to 500 litres and delivers through a hose under controlled pressure, so one vessel tops up several storage tanks without tipping or pumping.
How it reaches the bench
Smaller scale, and better done without gas pressure involved. The CryoCrest 35L and 50L dispense by manual foot pump, keeping the vessel upright and at atmospheric pressure.
Two things to fix before the first delivery
Ventilation and oxygen monitoring in the room, and a written fill log. The log is what tells you a year later which vessel’s vacuum is degrading and whether the supply contract is sized correctly.
