Medical gases include oxygen, nitrogen, carbon dioxide, nitrous oxide, and medical air. The specifications of medical gases comply with the limits set by the European Pharmacopoeia. They are used in medical care applications and in individual cases where their purity is required. REVIVAL offers medical gas cylinders in stock to promptly meet customer needs.

The large cylinder is the common packaging size for medical gases for large consumption or increased reserves. These are metallic cylindrical containers in which the gas is packaged at high pressures. They are distinguished by their color-coding, as shown in the photograph below, following a specific color code

The most common size for an oxygen cylinder is 50 liters. This volume refers to the content of the cylinder at atmospheric pressure (approximately 1 bar). The capacity of these cylinders reaches up to 200 bar (or 150 bar for older type cylinders). At this pressure, the cylinders are filled with medical gases. The only exceptions are nitrous oxide and carbon dioxide, as these two gases are in a liquid phase inside the cylinders. For this reason, the pressures of these gases are significantly lower (about 45-55 bar depending on the external temperature), and these gases are measured in weight units (kilograms). All other gases are measured in volume units (cubic meters), which certify their content

Based on the above, a gas cylinder (excluding nitrous oxide and carbon dioxide) when filled at 200 bar pressure contains approximately 10 cubic meters. This deviation is due to the fact that modern measurement techniques take into account the so-called compressibility factor of each gas, which is a constant for each gas. When multiplied by the ideal volume of 10 cubic meters, it gives the final content of the cylinder. For the most common gases, these constants are:

• OXYGEN CYLINDER: 1.07
• NITROGEN CYLINDER: 0.96
• HELIUM CYLINDER: 0.91

All large cylinders have French type (NF) valves with specifications according to the table below. The outlet connections of the cylinders vary depending on the type.