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CAUTION
If before using with nitrox mixtures a demand regulator was used with standard
compressed gas, it is recommended to carry out a proper maintenance
procedure. An Authorized Scubatech / Tecline Service Technician should
provide all required information about this subject.
Using demand regulators with nitrox mixtures in the EU (European
Union) countries.
Scubatech / Tecline offers additional models of demand regulators specially
prepared for use with nitrox mixtures of oxygen content over 21%, including the use
of pure oxygen. The above products were tested in accordance with PN-EN 144-
3:2005 standards Respiratory protective devices - Gas cylinder valves - Part 3:
Outlet Connections for diving gases nitrox and oxygen and PN-EN 13949:2005
Respiratory equipment - Open-circuit self-contained diving apparatus for use with
compressed nitrox and oxygen - Requirements, testing, marking.
Please contact an Authorised Scubatech / Tecline Dealer to receive more information
regarding these models.
6. Using in cold water
CAUTION
Cold water diving requires completion of a specialist training.
In accordance with European CE EN standardization, the temperature of cold water
is 10°C or lower. In such conditions, particularly in fresh water that has higher
freezing point, the risk of freezing of a pressure reducing valve or diving regulator is
high. The usual effects include a constant outflow of breathing gases, and their
quicker loss as a result. The lower the ambient temperature is, the higher the risk of
the above described situation is.
Demand regulators operating at low temperatures must be properly protected. Dry
chamber used in pressure reducers R2 TEC, R2 TEC O2, R2 TEC INT, R4 TEC, R4
TEC O2, R4 TEC INT, R5 TEC, V1 ICE, V1 ICE INT, V2 ICE substantially decreases
the risk of freezing. It is also highly recommended to use the above systems in
pressure reducing valves used for diving at the depth below 30m.
To reduce the risk of freezing of a demand regulator, it is necessary to:
avoid releasing breathing gases on the surface and underwater at the air
temperatures around 0°C and below,
not allowing for a free-flow of a diving regulator,
avoid simultaneous inflation of a buoyancy compensator and a dry suit,
before and during diving stay on the surface as short as possible at the air
temperatures around 0°C and below,
avoid quick, uncontrolled breathing,
avoid using single demand regulator by two persons at a time. Using an
additional fully self-contained demand regulator is safer in emergency
situations,
use clean and dry cylinders filled only in places authorized for this
purpose.
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