EOSC Supplemental Oxygen Dewar

The Emergency Oxygen Supply Connection (EOSC) is used to supply oxygen to the hospital when the bulk oxygen supply is not capable of supplying the proper pressure or flow of oxygen.

As an example, a facility with a vaporizer rated for 16,000scfh for 8 hours at 70 degrees is capable of running continuously 24/7 at a rate of 2,000scfh. If the existing vaporizer is icing at 50% or more, it is running at capacity.

The dewar we will use in this example is the Chart Large HP Liquid Portable. It has total contents of 6,811 scf and a maximum withdrawal rate of 400 scfh with a portable evaporator or 270 scfh using the built-in internal vaporizer.

We will use the portable evaporator option with ganged dewars and dual delivery regulators.

At 400 scfh with the portable vaporizers, dewars used per hour = 2000scfh/400 scfh = 5 dewars/hour.

Detail 8.7 shows the specification and capabilities of various containers including “H” cylinders, liquid/ HP containers.