SGB VL 330 Installation Advice

Leak detection technology

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Underpressure leak detector VL 330

For a clean and protected environment

Leak detection system to detect and indicate
leaks in double-walled tanks.

Every leak in one of the walls will be indicated by
an optical and audible alarm before liquid enters
the environment.

(Class I-system in accordance to the European
standard EN 13 160)

Liquids to be monitored:

Water polluting liquids :

• with a flash point > 55° Celsius; e.g. Diesel,
heating oil)

• specific chemicals in accordance to chemical
resistance of the leak detector. Different materials
to realise chemical resistance are available.

Installation kit
for the tank

triple condensate

VL 330 P in a protection box

trap

Complete set including for all necessary
installation equipment

Approved for the use together with:

• double-walled horizontal tanks (e.g. EN 12285)

• single-walled horizontal or rectangular tanks

equipped with a lining (e.g. DIN 6625 or similar)

• double-walled ball shaped tanks

• upright standing tanks (e.g. DIN 6618/2)

Approvals:

Germany: Z -65.22 - 389

•

Technical data:

type alarm

underpressure

VL 330

>330 mbar

(> 4.79 psi)

operational

underpressure

450 mbar
(6.53 psi)

Sold by: SGB Sicherungsgerätebau GmbH Tel.: + 49 / (0) 271 / 48964-0
Hofstr. 10 D-57076 Siegen Fax: + 49 / (0) 271 / 48964-6
Postfach: 21 07 41 D-57031 Siegen http//www.sgb.de
E-mail: [e-mail]

Leak detection technology

Underpressure leak detector VL 330

For a clean and protected environment

VL 330

P

Interstitial space with

Double-walled steel tank
underground

Monitoring principle:

The pump in the leak detector creates a
operational underpressure in the interstitial space.

Any minor unavoidable untightness is
compensated by the system automatically.

In case of a leak, air, groundwater or product is
sucked into the interstitial space.

If the volume flow of air entering the interstitial
space is higher than the limited volume flow of the
vacuum pump, the pressure will rise to the alarm
underpressure.

Groundwater or stored product is sucked into the
interstitial space. When the interstitial space is
filled up, the liquid enters the liquid stop valve,
which closes then. No further underpressure can
be produced. Some more liquid will be sucked
into the measuring line, causing a rise in pressure
to the alarm underpressure. The optical and
audible alarm is released.

Measuring line

underpressure

Exhaust line

Liquid stop valve

Suction line

VL 330 PM

Condenate trap

Double-walled

vertical steel tank

with suction line to

the low point

Installation advice:

The leak detector shall not be installed in
potentionally explosive atmosphere.

Outside closed and dry rooms, the leak detector
VL 330 P will realise the required weather
protection.

Coloured, chemical resistant, flexible or rigid tubes
are to be used as a connection between leak
detector and interstitial space.

Condensate traps are to be installed in all low
points of the connection lines, if applicable.

Three way cocks in the suction- and measuring
line on the leak detector guarantee a quick and
easy function check.

Dry relay contacts for alarm transmitting are
included as standard.

When operating, installing and commissioning the
leak detector VL 330, the conditions laid down in
the approvals for the leak detector, tanks and
linings are to be observed.
All works shall be carried out by a qualified person.

Subject to changes. Photos and SGB Sicherungsgerätebau GmbH Tel.: + 49 / (0) 271 / 48964-0
dimensions ar not binding for the Hofstr. 10 D-57076 Siegen Fax: + 49 / (0) 271 / 48964-6
extend of delivery. Postfach: 21 07 41 D-57031 Siegen http//www.sgb.de
Germany E-mail: [e-mail]