SGB DLR-P 1.1, Документация, Страница: 10 / 48

PRESSURE LEAK DETECTOR DLR-P ..
- 10 -
p
FD
Max. feed pressure in inner pipe
p
AE
Switching value "Alarm ON"; the alarm will be triggered at this
pressure level at the latest
p
PA
Switching
value “Pump OFF” (= operating pressure)
p
ÜDV1
Opening pressure for overpressure valve 1 (interstitial space)
The use of overpressure valves can be omitted if the test
pressure of the interstitial space is

3 bar (Type 1.1 and 1.5)
or

10 bar (Type 2.0 to 3.0).
p
PRÜF
Minimum test pressure of the interstitial space
Supplement to the table:
p
AA
Switching value "Alarm OFF"; the alarm will be deactivated if
this value is exceeded
The switching value “Alarm OFF” is approx. 100 mbar higher
than the switching va
lue “Alarm ON” (p
AA
= p
AE
+ ~100 mbar)
p
PE
Switching value “Pump ON”
The switching value “Pump ON” is approx. 100 mbar lower
than the switching value “Pump OFF” (p
PE
= p
PA
- ~100 mbar)
3.4 Field of Application
3.4.1 Interstitial space requirements
o
Proof of pressure resistance of the interstitial space (see section
3.3 switching values, table, column “p
PRÜF
” Minimum test pressure
of the interstitial space)
o
Proof of suitability of the interstitial space (for Germany: proof of
usability from construction authority).
o
Sufficient passage in the interstitial space for the leak detection
medium air.
o
Tightness of the interstitial space according to this documentation.
o
The number of interstitial spaces to be monitored depends on the
total interstitial space volume. According to EN 13160, 10 m
3
may
not be exceeded. To be able to test the tightness of the interstitial
space, it is recommended not to exceed 4 m
3
.
The pipeline length (per duct) to be monitored should not exceed 2
500 m and must correspond with the specifications for the pipe per-
mit.
3.4.2 Pipes
Double-walled pipes made of metal or plastic, in factory or on-site
construction.
For Germany: Additional requirements may result from the respective
permits.
3.4.3 Fittings
Double-walled fittings made of metal or plastic in factory or on-site
construction.
For Germany: with proof of usability from construction authority, un-
less it is part of the pipe permit.
Technical Data