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Breathing oxygen (O₂) is used for medical emergency situations where a person requires assistance with breathing.

Product information

The quality of the gas is:
* Oxygen (O2) ≥ 99.5%
and impurities:
* carbon dioxide (CO2) ≤ 300 ppm
* carbon monoxide (CO) ≤ 5 ppm
* water (H2O) ≤ 60 ppm

For oxygen the following is valid:

  • 1 nm3 = 1.311 kg
  • 1 kg = 0.763 nm3
  • 1 bar = 14.5 psi
  • 1 nm3 = 35.3 ft3
  • 1 kg = 2.2 lbs

The gas capacity of a cylinder can calculated in two different ways. The most simple method is the water capacity of the cylinder (in litres) multipled by the actual pressure (in bar); the result is the capacity in litres. Although a simple method it is not the most accurate method. A better but much more complex method will give a more accurate value for the gas capacity; it will take the compressability of the gas at both 1 bar and at the actual pressure in consideration and all based on 15 degrees C. The result is often quoted as normal litres or normal cubic metres (nm3). For oxygen the more accurate method will give a slightly higher value as compared to the simple method i.e. (8.6 m3 versus 8 nm3).


  • Breathing Oxygen cylinders are fitted with Yoke-type/PISS valves, which are familiar to the majority of users.
  • IMO requirements are for 1 cylinder 40 litre in combination with 2 pcs cylinder 2 litre which are both offered.
  • The filling pressure is lower in some locations than the normal 200 bar due to local rules and regulations that limit filling pressure.
  • Products meets the requirements of the USA and European Pharmacopea.


  • For your safety, the product is delivered in a Unitor cylinder complete with barcode and unique cylinder serial number
  • We trace and track all cylinders using the UniTrak system to give you peace of mind



Cylinder Type MOX-40

Physical properties

Colour White with green shoulder


Diameter [mm] 230
Gross Weight [kg] 66
Height [mm] 1210
Weight [kg] 10 Net

Technical data

Connection [inch] CGA870 / PISS ISO407 side
Filling pressure [bar] 200bar
Purity > 99.5%
Volume (l) 40

Performance data

Gas Capacity [m³] 8.6


Product name Product number Diameter [mm] Gross Weight [kg] Height [mm] Weight [kg] Cylinder Type Gas Capacity [m³] Connection [inch] Filling pressure [bar] Volume (l)
BREATHING OXYGEN MOX-2 FILLING 905638 102 3.4 415 0.52 MOX-2 0.43 CGA870 / PISS ISO407 200 2
BREATHING OXYGEN MOX-40 FILLING 905617 230 66 1210 10 MOX-40 8.6 CGA870 / PISS ISO407 200bar 40
BREATHING OXYGEN MOX-5 FILLING 905616 106 7.9 690 6.6 MOX-5 1 CGA870 / PISS ISO407 200 5