VRT 30 / User guide > 39
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. 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
maintained whenever the second stage is used as an
octopus for a safe second stage.
At the beginning of the dive, the diver should push the
Venturi lever in the + / plus position, to obtain optimum
breathing characteristics. The + / plus position is the "dive
mode" position.
Note :
• The V30 first stage 3/8" LP ports can accommodate the
safe second stage octopus and the buoyancy compensa-
tor LP hose and / or drysuit inflator hose.
• On the 7/16" HP ports, install a pressure gauge to check
air supply during the dive (right or left position).
• A 3000/3300 psi DIN connection kit can be installed on
the V30 first stage by a BEUCHAT authorized dealer.
• A 3000/3300 psi DIN to yoke adapter is available under
ref. #16740 to allow the mounting and the use of a DIN
regulator on a standard K-valve cylinder.
Notice Detendeurs 07-2008 int.qxd 31/07/08 15:46 Page 39
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