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   ASF Leak Detector Type D25 - Pressure Principle

   General Design Permit (DIBT) No. Z-65.26-250 (Tested by TÜV Nord, Hamburg)
   Available as 2/4 bar Version (pressureless pipeline), 2/6 bar Version, and 11/15 bar Version


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Application
 
  • The leak detector is used to monitor double-walled underground piping.
  • For monitoring of water-polluting liquids and/or flammable liquids with a flash point < 55°C.
  • The max. operating pressure allowed is 16 bar.
  • The alarm switching value must be min. 1 bar above the operating pressure of the inner tube.
  • When monitoring depressurized piping the pressure needs to be around 4 bar.
  • Also other monitoring pressures than the specified default values can be set (for details please see the technical description).
  • The leak detector can be connected to multiple pipelines by using an appropriate manifold.

The leak detector must be mounted outside the hazardous area (ex-zone)!


Function
 
  • Leak detector according to the pressure principle.
  • The interstitial space is filled once with inert gas - nitrogen (N2). Thereafter, the supply bottle, or the connection to the supply line can be removed.
  • The required monitoring pressure remains in the interstitial space without any refills necessary, if the piping work is done carefully.
  • The alarm switching value must be set min. 1 bar above the max. operating pressure chosen.

Standard Switching Values: 
Permissible operating pressure: Po

Po in bar

0

1

10

16

Alarm OFF PAA = bar 

4

6

15

21

Alarm ON PAE = bar 

2

2

11

17


For further data please see the data sheet of the D25 leak detector.

 
Operating Conditions
 
  • The interstitial space of the double-walled piping must be suitable for connecting the leak detector.
  • The double-walled pipeline must have the General Building Inspection Certificate (formerly Prüfzeugnis) or an admission of an other certified office.


Accessories

Mounting kits (MBS), protective casing and manifolds.


Mounting Examples

Please click on the picture for a larger view!

Picture a Picture b
Picture c
 
Product Images

Leak Detector Type D25 - Pressure

Documentation
 
Installation and Operation Manual D25Installation and Operation Manual D25
Data Sheet D25Data Sheet D25
General Design Permit (DIBT) D25General Design Permit (DIBT) D25
D25 AccessoriesD25 Accessories & Assembly Kits




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