68
2.1. - Master 2nd stage
The Master second stage is a revolutionary, pneumatic balanced
regulator with a an elliptical shape and reduced weight (only 207
g), and a futuristic design, with multiple innovative features cov-
ered by various patents.
The second stage provides air on demand, or only when the diver
breathes in using the mouthpiece, creating slight negative pres-
sure inside the regulator, which must be slight to avoid causing
difficulty breathing. This negative pressure acts on the elliptical
shaped special diaphragm with a variable section, designed to in-
crease the useful working surface and to maintain the inhalation
effort at the minimum possible levels, guaranteeing performance
entirely similar, if not better, than that obtained with clearly bigger
regulators.
The diaphragm, sucked inwards of the case, brings the central
disk, in the latest generation, friction-proof thermoplastic mate-
rial, in contact with the new and revolutionary lever, designed to
optimise and drastically reduce friction.
This, on lowering, opens the air delivery valve composed of a
pneumatically balanced piston, with a small diameter hole that
crosses it longitudinally where the air flows reaches the 1st stage,
up to reaching a small chamber (called “balancing chamber”)
placed on the end of the piston.
The air contained in this chamber exerts a force that varies de-
pending on the depth, that tends to push the closing piston to-
wards the valve nozzle. By doing so, having a balance between
the forces that operating over opening and closing the valve, you
can use a less loaded spring which therefore enables smoother
opening of the valve.
The force of the air passing through the nozzle and acting in an
opening direction on the pad, also perforated and fastened to the
end of the shaft, is in fact opposed by the sum of the spring and
air force, penetrating the balancing chamber.
This in practice means an inhalation effort reduced to almost null,
with superb performance also at depth.
The Master second stage is an adjustable regulator which therefore
allows the inhalation effort to be changed. Using the outer metal
knob, designed to guarantee perfect ergonomics even with thick
gloves, inhalation resistance can be regulated by varying the load on
fig. 7
fig. 8
SECOND STAGES
To Next Page
Loading...
