OVERPRESSURE LEAK DETECTOR
DLR-2
18/01/2002 Ihr Partner für Leckanzeigetechnik
Sicherungsgerätebau GmbH, Siegen
- 2 -
1. Object
Overpressure leak detector without integrated pressure generator for double-wall pipework us-
ing inert gas as the leak detection medium.
2. Type
DLR-2/11 for a nominal pressure of max. 11 bar in the interstitial space.
DLR-2/22 for a nominal pressure of max. 22 bar in the interstitial space.
3. Field of application
3.1. Pipework
Underground double-wall pipework
, the interstitial space of which is sufficiently resistant to
pressure according to the specifications in chapter 3.3.
More extensive demands on the interstitial spaces are revealed in TRbF 131/231 part 1, the
approval principles of DIBt or prEN 13160.
3.2. Material to be transported
Liquids hazardous to water
3.3. Pressure resistance of the interstitial space
p
test
= p
nom
y
1.3
with:
p
test
Testing pressure of the interstitial space
1.3
Safety factor
p
nom
Nominal pressure = p
alarm
+ (1.5.....5) bar; 4 bar recommended
p
alarm
p
B
+ (
≥
1) bar
p
B
Maximum operating pressure of the pipework in operation
1
The pipework can also be laid above ground in tempered rooms, it must be guaranteed that no fluctua-
tions in temperature of more than
±
10°C can affect the pipework.
2
Must not react with the leak detection medium
3
Safety factors above this value must be taken into consideration if hot liquids are to be transported in
the inner pipe.
