VACUUM LEAK DETECTOR
VLXE .. Ex M and VLXE .. Ex MMV
28/07/2020
- 18 -
- Do not mount in access or inspection chambers.
- The housing of the leak detector is integrated into the potential
compensation.
5.3 Pneumatic Connection Lines
5.3.1 Requirements
- At least 6 mm inside clearance
- Resistant to the stored or conveyed product
- At least PN 10 over the total temperature range
- The full cross section must be maintained (not bent)
- Color
coding:
Measuring line
: RED;
Suction line
: WHITE or
CLEAR;
Exhaust
: GREEN.
- The lines between the interstitial space and leak detector must not
exceed 50 m in length. If the distance is greater than this, a larger
cross section must be used. There are special requirements for the
exhaust line, see section 5.3.1.
- Condensate traps must be installed at all low points of the connec-
tion lines.
- Assemble liquid stop valve in the suction line (generally included in
the assembly kit).
- If liquids are being stored or transported that require compliance
with explosion protection, suitable denotation flame arresters must
be installed at the entry to the interstitial space.
5.3.2 Exhaust
- The length of the exhaust line must not exceed 35 m. If these
lengths are not sufficient, consult the manufacturer.
- The exhaust line is generally routed to the tank ventilation, in
which case a denotation flame arrester must be installed directly
before the connection on the tank vent side.
- Exceptions to the return of the exhaust to the tank ventilation:
Tanks with interior overlay pressure, tanks according to DIN 4119
with double-layered floor, double-walled pipes or comparable:
o
The exhaust line can lead outside to a safe
6
area, outside of the
explosion area:
Provide a condensate trap and liquid stop valve at the end of
the exhaust line. The area within 1 m diameter of the end of the
exhaust is considered as having zone 1 conditions; attach a
warning sign if necessary.
o
The exhaust ends in zone 1 (e.g. remote fill chamber or collec-
tion space):
A denotation flame arrester
7
must be provided at the end of the
exhaust line. Condensate traps must be provided at low points;
6
Among other things, not accessible to public transport/persons
7
The denotation flame arrester can be omitted, if the exhaust is laid frost-free and a kink (e.g. shifting of a
protective tube) or a block in the exhausted can be precluded.
Mounting
Summary of Contents for VLXE Ex M Series
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