VRT 30 - VRT 30 NITROX - VRT 30 “Cold type” / User guide > 37
C > Venturi lever
This lever, located on the side of the second stage
Housing, enables the diver to contr ol the inhalation
Venturi effect. When on the + position, the diver get
maximum Venturi assistance upon initial inhalation, the
air flow is maintained without additional ef fort.
Important : On the surface to avoid any fr ee flow resul-
ting from surface waves and / or sudden entry in the
water , the diver should keep the lever pushed towar ds
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 3300 psi DIN connection kit can be installed on the
V30 first stage by a BEUCHAT authorized dealer.
• A 3300 psi DIN to yoke adapter is available under r ef.
#16740 to allow the mounting and the use of a DIN regu-
lator on a standard K-valve cylinder.
2 - COLD WATER USE
Use of regulators in water temperature colder than 50 F /
10° C, requires special equipment and precautions.
Only the VR T30 “Cold type”, VR T80 Evolution, VX10
Iceberg, VX200 Iceberg, VR200 Soft T ouch, VR200
Evolution et VR200 Iceberg should be used in cold water
diving.
1. Make sure that your air supply meet the EN 12021 qua-
lity norm requirements.
2. Use a cylinder with a dual outlet Y-valve and two inde-
pendent breathing system outfitted for cold water use.
3. Do not expose the regulator to cold air (colder than 32
F / 10°C). Place the regulator first stage in the cold water
to bring its temperature up before use.
4. Do not purge the second stage outside the water to
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