6
breathing gas flow in combination with the Venturi nozzle reduces substantially
breathing resistance when the breathing mixture flow increases during the increase
of diving depth.
In addition to adjustment of the Venturi effect, the second pressure reduction stages
of Scubatech demand regulators are equipped with a breathing resistance
adjustment knob located on the opposite side of the interstage hose of the diving
regulator's box. When the knob is set in a closed position, taking a breath requires
more strength and the diving regulator is less sensitive to sudden changes of
pressure. Breathing is easier when the knob is twisted off, as it requires less strength
to take a breath. Adjustment is smooth and you can set the knob in the position that
suits you best. When storing a diving regulator equipped with a breathing resistance
adjustment knob, the knob should be set in an open position, which prevents against
damage of the seat.
Figure 2.
The second stages of pressure reduction of demand regulators
Interstage hose
- a medium pressure hose of operating pressure 1.7 MPa. Metal
ends are connected to the hose with twisted connections that ensure high quality
connection.
Basic technical data:
Tested to depth
- 50m
Maximum supply pressure
- 30 MPa
Reduced pressure
- 9.0 – 9.5 atm
Threads:
Mounting ferrule
- DIN 5/8”
High pressure
- 7/16” (number depends on a model)
Medium pressure
- 3/8” (number depends on a model)
