Main Features Of Nitrox Dedicated Regulators; Use And Maintenance Notes - Scubapro MK25T Manual Del Usuario

! WARNING
Titanium is not compatible with Nitrox (oxygen-enriched air) mixes because it may
ignite when exposed to high oxygen concentrations.
Do not use a Titanium regulator with oxygen-enriched air at an oxygen percentage
greater than 40%.
There is no way to convert a Titanium regulator for use with oxygen-enriched air at
an oxygen percentage greater than 40%.
Within the European Community the use of Nitrox mixes is regulated by norms EN 13949 and
EN 144-3. SCUBAPRO has designed and manufactured a special regulator line that complies
with the aforementioned regulations. The fi rst and second stage regulators of this line are
identifi ed by the marking "Nitrox" and also feature components colored green or yellow, or
marked with special stickers, to allow an immediate identifi cation.
These regulators can be used with oxygen enriched air containing an oxygen concentration
higher than 22% and up to 100% (pure oxygen), at a maximum operating pressure of 200
bars (2900 psi).
9.1

Main features of Nitrox dedicated regulators

As required by European Norms, Nitrox fi rst stage regulator connections have been designed
and approved to be used exclusively with Nitrox cylinders and cylinder valves, in order to
prevent confusion with the corresponding standard-production compressed air regulators.
SCUBAPRO Nitrox connections comply with EN 144-3.
In Nitrox fi rst stage regulators, compatibility with high pressure oxygen (higher than 40 bar / 580 psi
and up to 200 bar / 2900 psi) is ensured by the choice of special materials used to manufacture
seats, O-rings, gaskets and seals used in the high pressure fi rst stage mechanism valves.
Components are lubricated with a specifi c oxygen lubricant. SCUBAPRO Nitrox regulators are
assembled in a dedicated area in order to comply with the high cleanliness standards required for
oxygen compatibility.
9.2

Use and maintenance notes

Nitrox regulators must be used only with oxygen enriched air and only in combination with
compressors and cylinders specifi cally dedicated to the use of Nitrox mixes. Breathable
air (21% oxygen), even if compliant with European Norm EN 12021, can contain a certain
amount of hydrocarbons. These, while not constituting a health hazard, can ignite in the
presence of a high concentration of oxygen.
Should Nitrox regulators be used with compressed air coming from a compressor lubricated
with standard oil they could be contaminated by fl ammable residues that would make them
dangerous when used again with oxygen enriched air. In case of such a contamination,
before using the regulator again with Nitrox, it will be necessary to disassemble it and
perform an oxygen-specifi c cleaning in compliance with special procedures (for instance:
CGA G-4.1 protocol or ASTM G93-88 or other offi cially approved procedures) carried out
by a certifi ed technician trained in oxygen cleaning and procedures.
1. During routine maintenance procedures it is required to use only genuine SCUBAPRO
components specifi cally approved for the use with oxygen (seats, O-rings and lubricant).
2. After use, rinse thoroughly with fresh water, let dry completely before storing in a dry,
clean, cool place.
3. Never use solvents as they might damage rubber and plastic components.
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USE OF NITROX MIXES WITHIN THE EUROPEAN UNION