Automatic changeover valve type AUV-ND
Part No. 02 585 5
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FUNCTION DESCRIPTION
The automatic changeover valve (AUV-ND) with integrated low pressure regulator is a
pressure regulator with automatic changeover to connect to two-cylinder systems.
•
Consisting of automatic changeover valve, low pressure regulator with
pressure relief valve (PRV), turning knob, operating and reserve display, non-return valve
and test connector
•
The AUV-ND ensures an even outlet pressure of 29, 37 or 50 mbar with a permitted inlet
pressure of 0.6 to 16 bar.
•
Automatic changeover to the spare gas cylinder(s) as soon as the gas cylinder(s) on the
operating side is/are empty with a simultaneous
RED
display on the integrated operation
and reserve display.
•
The gas cylinder can be replaced without interrupting operation.
Only alternating withdrawal is possible.
•
The non-return valves installed in the inlet nozzle prevent unintentional gas leaks when
changing the cylinders.
•
Even gas supply through optimum use of the gas cylinder content.
DESIGN
Arrow indicating the withdrawal direction on
the turning knob
Turning knob for the operation of spare
cylinder
Inlet connections
Outlet connection
Test connector with screw cap
Check valve with twist grip
Breather for the PRV
Assembly board (elbow)
Sealing nut with strap on
inlet connection
Operation and spare cylinder display
(green/red)
PRESSURE RELIEF VALVE PRV
The pressure relief valve (PRV) is an automatic safety device with limited flow that is installed
in the pressure regulator to protect connected devices against inadmissible high pressures. If
there is inadmissible high pressure at the outlet side, for example due to high temperatures,
the PRV opens and relieves the excess pressure through the breather. When the pressure
falls, the PRV closes again automatically.
A connection to the open air must be created if a pressure regulator with PRV is to be
operated indoors, inside housing or in any other areas that could be at risk.
"PRV" is marked on the type label of the pressure regulator.
