Anderson Greenwood LSFE Series Liquid Seal Flame Arresters IOM (ES/0/0/152), Anderson Greenwood-EN Manuals & Guides

ANDERSON GREENWOOD AMAL LSFE SERIES LIQUID SEAL FLAME ARRESTERS

INSTALLATION & MAINTENANCE INSTRUCTIONS

1. GENERAL

The LSFE liquid seal in-line flame arrester
is designed to protect tank systems and
equipment from detonations that can occur on
tank filling lines. They are one directional and
are fitted external to the tank. They are for use
under atmospheric pressure conditions only.

2. GUIDANCE

1. Maximum temperature limits -20° to +60°C.
Maximum flange pressure limit is PN 25.

2. ONLY install for applications for which
they have been designed and specified and
within their tested/certified limitations ­refer to product data sheet for guidance.
It is potentially dangerous to use in other
applications.

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

4. 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.

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

6. Continuous monitoring of pressure drop is
advised if the process is known to contain
particulate or substances which can block
the internal flow path and over-pressurize
the system.

7. Metal parts insulated by gaskets should be
earthed where necessary.

8. 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.

3. INSTALLATION

1. No special tools are required in order to fit
these flame arresters. Only standard sized
spanners as appropriate and lifting gear for
larger units, where applicable, are required.

2. Remove all packaging from the flame
arrester prior to installation, paying
particular attention to the inlet and outlet
flange connections.

3.

Mount the flame arrester into the pipeline
in the horizontal position - they are one
directional and the ‘protected side’ will have a
plate clearly showing this.
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
give a good seal.

4. When appropriate, it is recommended that
a protective cage be installed to guard the
flame arrester against accidental impact
from vehicles or heavy falling objects.

4. MAINTENANCE

Maintenance should only be carried out by
suitably qualified personnel.

1. It is recommended that the flame arrester
be inspected at each scheduled plant
maintenance period. Particles within the
process may cause blockage to the flow
passage, impairing the free flow of liquids.

2. Where a process is known to be 'dirty',
a pressure-limiting device installed
within the associated pipeline is strongly
recommended.

3. There are no maintainable or moving parts
within the unit, it is an entirely welded
construction. At each scheduled plant
maintenance period remove the drain plug
at the bottom of the unit to flush out any
sediment or oxide particles which have
accumulated. Ensure that there is NO
pressure in the system when this is carried
out. The flushed fluid should be taken to a
safe area for disposal.

Note: please observe all health and safety

data sheets which are applicable to the
particular fluid which is being used in the
system. Always wear appropriate safety
equipment, with eye protection, when
working on or near flame arresters. See
over for checking minimum liquid level.

© 2017 Emerson. All Rights Reserved.Emerson.com/FinalControl VCIOM-02479-EN 15/12

ANDERSON GREENWOOD AMAL LSFE SERIES LIQUID SEAL FLAME ARRESTERS

INSTALLATION & MAINTENANCE INSTRUCTIONS

4. Check the gaskets which connect the unit to the pipework and change if damaged.

5.

The pipe immersion depth inside the flame arrester is 425 mm; the liquid level should be
maintained at this height where practicable but should not be allowed to reduce below 225 mm.
This can be checked by either reference to the level indicator, where fitted, or use of the ‘dip stick’
provided. Do not use the ‘dip stick' if the system contains poisonous / dangerous fluids. Always
check before using.

5. SPARE PARTS

There are no recommended spare parts..

6. AFTER SALES SERVICE

Available through the relevant Emerson office in the United Kingdom or through our worldwide
network of regional offices and agents.

7. SPECIAL CONDITIONS FOR SAFE USE

For IIA, IIB1, IIB3, IIB the manufacturing is intended for sizes DN 80 (3”)

8. MARKING ON THE FLAME ARRESTER (CE PLATE)

9. MARKING ON THE FLAME ARRESTER (NAMEPLATE)

Nameplate can be marked for gas groups IIA, IIB1, IIB3 and IIB only.

Either IIA, IIB1, IIB3 or IIB

Either detonation or deflagration

Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.

Anderson Greenwood is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation
Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.

The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be
construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by
our terms and conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without
notice.

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