Vent Line / In-Line Parallel Plate
Fla e Arrester is designed for
installation in open vent pipe or
bleed lines fro storage or pro-
cessing tanks. Suitable for NEC
Group D (IEC Group IIA) vapors
Co bination Pressure / Vacuu
Relief Vent & Fla e Arrester
provides pressure and vacuu
relief as well as protection fro
propagation of externally intro-
duced fla es. Suitable for NEC
Group D (IEC Group IIA) vapors.
Series 4950 Series 830
Pipe-Away Pressure Vacuu
Relief Vent for applications that
require hazardous vapors be
processed into anifolded
piping and not released into the
at osphere
Series 18540
Ins alla ion & Main enance Series 7800
End-of-Line Emer ency Pressure Vent
ADDITIONAL PRODUCTS FROM PROTECTOSEAL
©2009 The Protectoseal Company VM-7800/1
PROTECTOSEAL®
Safety Without Compromise
225 Foster Ave., Bensenville, IL 60106-1690
P630.595.0800 F630.595.8059
MAINTENANCE:
Protectoseal recommends that our products be inspected and
maintained according to the normal maintenance schedule of
the facility. At a minimum, maintenance should be conducted
annually. More frequent maintenance may be required, and
should be scheduled, for unusual service conditions.
CAUTION: When maintaining any Pr tect seal
device, the legal, c rp rate and advis ry safety
regulati ns and pr cedures appr priate f r the
specific installati n site must be fully underst d
and f ll wed.
CAUTION: Tank vap r space pressure r vacuum
sh uld be relieved bef re any maintenance
perati ns are undertaken.
MAINTENANCE PROCEDURE:
1. Loosen wing nuts and remove weatherhood.
2. Remove any loose dirt or foreign material from the hous-
ing interior and exterior. Check inside the stem guide hole
of the cover and remove any dirt or accumulation of for-
eign material.
3. ithdraw the pressure pallet assembly and any weights.
Set aside for inspection. Note: Identify any weights on
the pressure pallet assembly for later reinstallation.
4. Inspect the screen that protects the pressure port. Clean
or replace as necessary.
5. Inspect and clean the machined seating surface in the
vent with a suitable cleaning fluid. Seat should be free of
nicks, mars or accumulation of foreign material.
CAUTION: D n t use a file r ther sharp t l
t clean the seating surface.
6. Inspect the pallet assembly. If pallet is deteriorated or
bent, it must be replaced. Inspect the diaphragm material
in the pallet assembly. The diaphragm must be clean, flat
and smooth. If the diaphragm material is deteriorated, it
must be replaced. Make sure that all nuts and screws on
the pallet assembly are tightened securely.
7. Reinstall the pressure pallet assembly. Setting weights (if
provided) should be installed by engaging the hole in the
weight on the pallet assembly stem. Make sure that
weights are properly installed as marked to provide spec-
ified set points. Heavy weights may be provided with
tapped holes to temporarily attach lifting hardware to fa-
cilitate installation. Any such threaded fasteners used
during installation must be removed from the weights.
Foreign objects will limit the lift capability of the pallet as-
sembly and will reduce rated flow capacity of the vent.
8. Replace the weatherhood. NOTE: Make sure that the
pressure pallet assembly stem positively engage the hole
in the stem guide in the weatherhood and in the weather-
hood. It may be useful to verify engagement of the pres-
sure stem into the weatherhood stem guide by
unthreading the guide and then reinstalling it with the
stem centered in the hole. The pallet assembly must be
free to move upwards, with the pallet stem traveling into
the stem guide.
9. Secure weatherhood with wing nuts.
E ergency Pressure Manhole
Cover Vents provide e ergency
pressure relief for storage
tanks where vacuu relief is
being provided for by a separate
operating vent
Series 53300
888.858.3647 | relevantsolutions.com
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