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Varec SerieS 5000/5010 Flame arreSter
InstructIon, operatIon and maIntenance manual
INStallatION
the 5000 Series flame arrester (ref. Figure 2)
is designed for vertical application in pipe lines
and on tank or digester roofs. the 5010 Series
flame arrester (ref. Figure 3) is designed for
horizontal positioning in pipelines, however, it
may be in either direction.
the cover, roof or piping system must have
the appropriate flange(s) installed for mating
with the flame arrester. Flame arrester with
aluminum housings should be mated with an
aNSi Class 125 F.F. flange. the 316 stainless
steel housing should be mated with an aNSi
Class 150 r.F. flange. the arrester must be
located with clearance allowed for removal of
the bank assembly.
the flange of vertical mounting must be plumb
and level to ensure proper operation of the
pressure relief valve (when used in combination
with the flame arrester).
the flange for horizontal mounting must be
oriented to ensure that arrester drain hole will
be at the extreme bottom (6 o'clock) position.
1. remove the flame arrester from the
shipping container or pallet.
2. remove flange protectors. inspect for and
remove any packing or other loose material
in the inlet/outlet chambers of the housing.
3. remove cover and extract bank assembly.
inspect for shipping debris or damage and
correct as required. insert bank and replace
cover. tighten cap screws uniformly.
WarNINg
The aluminum bank assembly weighs from
10 to 80 pounds and the 316 S.S. assembly is
substantially heavier. Use the appropriate tools
and equipment when handling these units to avoid
injury.
4. Place the appropriate full face flange gasket
(by others) on the flange.
cautION
If it is necessary to mate an ANSI Class 125 F.F.
flange with an ANSI Class 150 R.F. flange, use
the proper spacer to convert the raised face to a
flat face.
5. Place the arrester on the flange, and
position the unit so that the bank assembly
can be readily extracted for inspection and
maintenance.
NOte
When installing the model 5010 in a horizontal
position, check the drain hole to see that it is
functional. install the appropriate drain piping along
with a Varec Drip trap or an isolation valve.
6. install mounting hardware and tighten
uniformly.
the flame arrester is now installed and ready
for use.
MaINteNaNce
maintenance is the most important factor
in the operation of the flame arrester. the
bank sheets must be kept clean to prevent a
decrease in gas flow through the system and
loss of heat absorbing efficiency.
WarNINg
Failure to properly maintain the unit could result
in reduction of safety and impairment of system
operation.
a regular inspection program is important. the
frequency of inspection is determined by the
application. Consideration should be given to
the amount and nature of water or solids in the
gas and the corrosivity of the process stream.
Generally, the first inspection should be made
30 days after commissioning. inspections
should continue on a 30 day schedule unless
excessive deposits or accumulation of foreign
matter are found. if so, the frequency of
inspections should be increased. adjust
inspection frequency to maintain free and
unrestricted flow through the arrester.
WarNINg
Flame arrester must be isolated from the gas
piping before removing cover plate. All gas
must be blocked and pressure safely vented.
Ensure that arrester is cool after a fire, or wear
appropriate protective clothing.
1. remove cover cap screws and cover plate.
Pull out bank assembly by pulling on bank
handle. if desired, the bank assembly may
be removed from the housing.
WarNINg
The aluminum bank assembly weighs from
10 to 80 pounds and the 316 S.S. assembly is
substantially heavier. Use the appropriate tools
and equipment when handling these units to avoid
injury.
a. extend the aluminum frame to its full open
position. Both sides of each grid sheet may
be inspected and cleaned without removal
from the frame.
b. the 316 S.S. frame is non-extensible and
must be disassembled to access the bank
sheets.
2. Check for corrosion, bent, warped or
otherwise damaged sheets that could cause
an opening for a direct flame path. replace
with a new bank assembly if necessary.
3. Bank assembly cleaning procedure is
based on the type of residue to be removed.
Determine if residue type is Group i, ii, or
iii. Follow the cleaning procedures for the
selected group.
WarNINg
Use all volatile and flammable solvents carefully
to avoid ignition or prolonged breathing. Use
protective clothing and gloves when using acid to
avoid burns from contact with skin.
3
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