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3. Design and basic technical data
Scubatech / Tecline demand regulators are two-staged diving regulators with
pressure reduction stages separated by an interstage hose. They are composed of a
first-stage pressure reduction (pressure reducer), interstage hose and a second-
stage pressure reduction (diving regulator).
The first pressure reduction stages of demand regulators are pressure relief valves.
They are equipped with 2 or 4 reduced pressure ports marked with the letters LP and
1 or 2 high-pressure ports marked with the HP letters. The HP ports have larger
diameter than medium pressure ports. The first pressure reduction stages of
Scubatech / Tecline demand regulators (only models: 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) are
equipped with diaphragm, which protects operating environment of the high-pressure
valve and other valve components against external conditions. This solution allows
for using the valve in extreme conditions and the regulator is also designed for use by
advanced divers. Other first pressure reduction stages of Scubatech / Tecline
demand regulators (only models: R1 PRO, R1 PRO O2, R1 PRO INT) are piston
pressure reducers with wet chamber which make the construction light and simple.
The main task of the first pressure reduction stages of demand regulators is to
reduce pressure in a diving cylinder (or set of cylinders) to the pressure value that
corresponds to the total pressure of ambient pressure (hydrostatic pressure variable
depending on depth) and constant overpressure of 9-10 bar.
Figure 1. The first stages of pressure reduction of demand regulators
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