SGB VLXE Ex M Series, Documentation

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VACUUM LEAK DETECTOR VLXE .. Ex M and VLXE .. Ex MMV
28/07/2020
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12. Appendix
12.1 Use of Interstitial Spaces That Are Filled with Leak Detector Fluid
12.1.1 Requirements
(1) Only leak detectors with suitable alarm pressures which depend
on the tank diameter and the density of the stored material may
be used.
(2) The procedure described below is intended for the horizontal cy-
lindrical tanks (e.g. DIN 6608 or EN 12285-1).
(3) If this method is used on other tanks, the permission of the locally
responsible authority is required on a case-by-case basis.
12.1.2 Preparation
(1) Remove the fluid-based leak detector.
(2) Remove the leak detection fluid from the interstitial space by suc-
tion. With the following procedure:
- Connect the suction line connection of the assembly pump to
a tank 11 socket with intermediately connected tanks.
- Suction out until no more liquid is being suctioned.
- Assembly of a (large) shut-off cock (at least ½") on the other
connection and close the shut-off cock.
- Pump out liquid until no more liquid comes into the intermedi-
ate tanks.
- Suddenly open shut-off cock (with pump running) so that a fur-
ther “surge” of leak detecting fluid enters the intermediate
tanks.
- Continue operating with opening and closing of the test cock
until no fluids enter the intermediate tanks either in the open
position or in the close position.
12.1.3 Installation and Commissioning of the Leak Detector
(1) The suctioning of the leak-detection liquid creates an air cushion
above the leak detection liquid.
(2) Install the leak detector according to the documentation and start
it up.
(3) Perform a functional check on the leak detector.
11 The liquid to be suctioned out is collected in this tank.
Appendix