Technical details

LD

S

8.230

Leak monitoring system

s

Vacuum leak detector type VLX 330/A-Ex

System description, technical dat

a

Type VLX 330/A-Ex, version with partial protection from explosions

The vacuum leak detector type VLX 330/A-Ex is suitable and approved for monitoring double-walled safety

piping through which the following fluids are transported:

•

•

Flashpoint < 55 °

C

water-hazardous,

flammable

fluids with a possible occurrence of potentially explosive vapour-ai

r

mixtures assignable to explosion categories IIA or IIB3 and temperature category T1 to T

3

(e.g., petrol, motor fuels in general, ...)

Double-walled components may be integrated into the piping. Approved for a max. operating pressur

e

in the operational pip

e

Type VLX 330/A-Ex ...

Type VLX 330/A-MV-Ex

up to max. 10 bar

up to max. 25 ba

r

Installation/commencement of operations/operation/function testing

The scope of application of the leak detection device must be limited to fixed maximum pipe lengths

due to the laws of physics. These depend on upper and lower points of reference and on the type of lyin

g

of the double-walled safety piping. The types of laying are illustrated in the Worksheets LDS 8.233

ff.

The conditions set out in the approval for double-walled piping and for the leak detector must b

e

complied with

.

Overview of leak detector VLX 330/A-E

x

Applications

Water-hazardous fluids with a

flashpoint < 55 °C, with a possible occurrence of potentially

explosive vapour-air mixtures assignable to explosion categories IIA or IIB3 and temperature

category T1 to T3 (e.g., petrol, motor fuels in general, ...

)

Operating pressure

in inner pipe

VLX 330/A-Ex:

max. 10 bar

VLX 330/A-MV-Ex:

max. 25 ba

r

Monitorable

pipe length

L max = monitorable pipe length acc. to Worksheet LDS 8.120

for underground and surface-laid pipe

s

Installation area

acc. to installation instructions and description of leak detector VLX 330/A-E

x

Installation

see description of leak detectors VLX 330/Ex and VLX 330/A-Ex

Housing

VLX 330/A-Ex comprises a control unit and the working devic

e

Fittings

fittings set out in the programme for the leak detector and the double-walled pipin

g

Electrical data

Rated input (without external signal)

230 V~/50 Hz/50

W

Switching contact load, potential-free contacts

max. 230 V~/50 Hz/5

A

Connector block 21 - 24

min. 6 V/10 m

A

External fuse predection of the leak detector

max. 10 A

Overvoltage category

2

On request, type VLX 330/Ex can be delivered in a completely explosion-protected version

.

31.03.2026 Subject to technical changes. Page 14