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Developed and tested for safety.
Oxygen bonds with all elements in the process known as oxidation. If this process occurs rapidly fire can result. It is therefore essential that materials which will oxidise rapidly are not present in oxygen processing systems. Contaminants such as oils and greases, including anything from lubricants to simple residue contamination from handling components with bare hands, are very capable of reacting with oxygen to cause fire and potentially an explosion.
In addition to ensuring cleanliness when working on oxygen handling systems all components, including sealing products such as compression packings, must also conform to the same levels of cleanliness - containing no potentially reactive lubricants or materials.
Although oxygen itself does not burn, it supports combustion. The more oxygen present in a system the greater the risk of fire occurring and the lower the temperature at which ignition will occur until, in its purest form, it can cause the rapid or spontaneous combustion of most materials - even metals.
Supagraf OX is specifically designed to provide safe operation in duties involving liquid and gaseous oxygen. It is BAM certified for such use and the material from which it is manufactured conforms to Shell MESC SPE 85/204. The product is also listed in the Shell MESC 77/303 specification by name and is therefore exempt from the Solvent Extraction Production Test and Oxidation Production Test - saving valve manufacturers from the cost and time necessary to carry out such testing.
From yarn to finished product, manufacturing takes place under clean-room conditions. Every product batch is then extensively tested at the end of the process to ensure cleanliness and suitability for oxygen before being dispatched to the customer in hermetically, double-sealed packaging to ensure it reaches the point of use in a clean condition. Assuming that the product is then correctly handled and installed - (see US standard CGA G-4.1-2009 Cleaning equipment for oxygen service, 6th edition) Supagraf OX will provide safe, low emission stem sealing of valves in service with liquid or gaseous oxygen.
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