Bühler technologies AGF-PV-30 Guía Rápida página 7

AGF-PV-30, AGF-PV-S2, AGF-T-30, K-
AGF-PV-30, RAF-PV-30, ADF-PV-30
The approved explosion class of the inner zone varies by the
filter element used. The following table provides an overview
of the explosion classification of possible filter elements:
Filter element Suitable for gasses in explosion group:
model:
S2 Group IIC (Zone 1)
S2-KU Group IIC (Zone 1)
F2 Group IIB (Zone 1)
F25 Group IIB (Zone 1)
F2-L Group IIB (Zone 1)
F25-L Group IIB (Zone 1)
12-57-C Group IIC (Zone 1)
Tab. 1: Gas explosion groups for filter elements
Safety instructions
The following safety notices must absolutely be followed
when operating the filter in an area with explosive atmo-
sphere. Failure to do so can result in an explosion hazard.
• Only perform installation-, removal- and maintenance
work in non-explosive atmosphere.
• Protect filter from mechanical impact. If necessary, install
a cover which withstands at least 4 joule.
• Protect filter from vibration, or avoid vibration. If neces-
sary, mechanically brace supply and discharge lines.
• Observe all limits, operating parameters, etc. specified in
these operating instructions and the data sheet.
• Maintenance and cleaning instructions must be followed.
• When used with moist gasses, a condensate separator
must be installed. Moist gasses can clog pores in the filter.
Gas pressure building up can result in an impermissible
temperature rise.
• Observe the grade of filtration of the fine mesh filter and
if necessary install a pre-filtration to ensure larger solid
particles do not clog the filter prematurely.
• Observe the durability list in this document. Only use me-
dia compatible with the filter materials.
• Do not repair the filter. Damaged filter components must
be replaced.
• Do not paint, laminate or otherwise coat the filters.
• Observe the applicable constructor regulations, e.g. EN
60079-14, for installation and mounting.
• All metallic parts of the filter must be connected to an
earth potential. The resistance of a continuity test must
6
not exceed 1 MΩ (1*10
• The sealing materials, e.g. Teflon tape, must be conduct-
ive so all parts of the filter are earthed. If necessary, install
an earth bridge.
Operation and Control
DANGER
Risk of explosive gasses leaking and crossing zones
Check the filter is tight prior to operation.
Inadequately sealed filters can leak. Gas may leak or the am-
bient atmosphere be drawn in. Use a suitable method for the
leakage test, appropriate for the application.
BX410011 ◦ 10/2020
Ω).
Operation with moisture detector
DANGER
Explosion hazard
To operate the filter in an explosive atmosphere with mois-
ture detector, the moisture detector and controller must be
ignition protection class intrinsically safe "i". The use of non-
intrinsically safe components may result in ignition in explos-
ive atmospheres.
Also note the specifications under EN 60079-14 in this respect.
Service
Please note the following instructions. Failure to do so may
result in explosive gasses escaping and crossing zones.
• Check the filter is tight after any maintenance and the in-
tervals specified in the maintenance schedule. Inad-
equately sealed filters can leak. Gas may leak or the ambi-
ent atmosphere be drawn in. Use a suitable method for
the leakage test, appropriate for the application.
• There must be no internal or external Ex atmosphere
when performing maintenance. If necessary, flush the fil-
ter with inert gas. Switch off pumps on the gas circuit and
close supply and discharge lines.
• After performing any maintenance, before closing the fil-
ter be sure the pressure spring is installed inside the filter
if previously removed, or is seated correctly.
Service schedule
When using the filters in ATEX areas, follow this maintenance
schedule:
Component Interval in operating
hours
Filter ele- Weekly, and depending
ment on the contamination
level of the filter ele-
ment.
O-ring Every time the filter
cover is removed.
Entire filter Weekly and depending
on the external level of
contamination.
Entire filter Every 6 months and
every time the filter is
opened.
When replacing the filter element, the seal must also be re-
placed.
Work to be performed
• Visually inspect for
contamination.
• If contaminated,
replace the filter
element and O-
ring.
• Clean O-ring con-
tact surfaces.
• Replace O-ring.
• Remove layers of
dust with a damp
cloth.
• Perform a leak test.
Bühler Technologies GmbH 7