1. GENERAL

ERQ series vent flame arresters are intended
for low-pressure venting applications where
the maximum differential pressure across the
flame arrester does not exceed 1 barg. 

2. GUIDANCE

1. Maximum temperature limit is -20° to +60°C
(+200°C for certain gas groups - see special
conditions for safe use).

2. Mounting of all monitoring devices shall be
in accordance with EN 50018.

3. Flame arresters should not be positioned
near hot equipment unless certified for the
elevated temperature as heat transfer to the
flame arrester will reduce its performance
and may cause it to fail.

4. Shut-off devices should be fully open during
normal operation.

5. Continuous monitoring of pressure drop is
advised if the process is known to contain
particulates or substances which can
block the element and over-pressurize the
system.
6. Metal parts insulated by gaskets should be
earthed where necessary.

7. Flame velocities and pressures of
flammable mixtures can be enhanced by
upstream turbulence, which can be caused
by bends, valves or any change in section
of the pipework. The flame arrester should
only be used for the process application;
if the process conditions or the pipework
configuration change the flame arrester
should be checked with the manufacturer.

8. ERQ series vent flame arresters are
designed to prevent external fires/
explosions igniting flammable gases/
vapors within vent piping and associated
equipment. They are NOT designed to
prevent internal explosions passing to
atmosphere.

9. ONLY install for applications for which
they have been designed and specified -
refer to product data sheet for guidance.
It is potentially dangerous to use in other
applications.

3. INSTALLATION

Remove all packaging from the flame arrester
prior to installation, paying particular attention
to the area between the flame arrester element
and weather cover.
Mount the flame arrester vertically upright at
the end of the vent line:
(i) Flanged connection - bolt to a flange of
the same specification as that fitted to the
flame arrester itself, with an intermediate
gasket of a type appropriate to the service
conditions. Tighten the bolting uniformly to
ensure a good seal.
(ii) Screwed connection - fit to the
corresponding male/female thread. Sealing
tape or sealant may be used to ensure a
good seal.