Beuchat VS3 Notice D'utilisation page 43

Notice Detendeurs 07-2008 int.qxd
VRT 80 Technical specifications
EUROPEAN EN 250 STANDARD.
All BEUCHAT regulators meet the European EN 250 -
2000 standard.
1- VRT 80 SPECIFICATIONS
Yoke 230 bars - 3300 psi (Réf. : 316 030)
DIN 230 bars - 3300 psi (Réf. : 316 031)
The VRT 80 regulator is composed of a balanced dia-
phragm first stage and a VRT balanced second stage with
Venturi adjustment (Dive mode).
A > V80 First stage
The balanced diaphragm V80 first stage reduces the high
pressure air in the cylinder to an adjustable intermediate
pressure of 9,6 bars (145 PSI) above ambient pressure.
The first stage is balanced and delivers air at constant
pressure even as the pressure decrease inside the cylinder.
A low pressure hose links the first to the second stage.
The first stage features four 3/8" LP ports and one 7/16"
HP ports.
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B > VRT second stage
The VRT second stage is a pneumatically balanced second
stage, witch offers optimum ease of breathing. An addi-
tional adjustment allow the diver to fine tune the Venturi
effect to the dive / diver conditions. A specially designed
front cover offers maximum protection to the diaphragm
and minimizes the side effect of strong currents. The
second stage comes from factory with adjustment Venturi
lever in the minus position.
C > Venturi lever
This lever, located on the side of the second stage
Housing, enables the diver to control the inhalation
Venturi effect. When on the + position, the diver get
maximum Venturi assistance upon initial inhalation, the
air flow is maintained without additional effort.
Important : On the surface to avoid any free flow resul-
ting from surface waves and / or sudden entry in the
water , the diver should keep the lever pushed towards
the front in the - / minus position. This position should be
VRT 80 / User guide > 41