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Below is a cache of http://www.donaldson.com/en/gasturbine/support/datalibrary/000519.pdf. It's a snapshot of the page taken as our search engine crawled the Web.
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content. GTS-501_ele_changeout Tech Topics GTS-501 Rev 6/04 Filter Pair Replacement Procedures for Pulsed (GDX) and Non-Pulsed (GDS) Filters In the Donaldson GDX Air Inlet Self-Cleaning
(pulsed) Filtration Systems and the GDS Air Inlet
Static (Non-Pulsed) Filtration Systems, 2 filters
(one conical + one cylindrical, or two conicals)
are paired and mounted horizontally to provide
superior turbine protection. When to Service Donaldson Filter Element Pairs The filter elements should be removed if the dirty filter P (differential pressure) is higher than the operational guidelines. For instance, if dirty filter P is at 5.2 in. w.g. and the recommendations are for
maximum dirty filters at 5.0 in. w.g., then its time for
changeout. It is important to note that the dirty filter
element can safely accommodate higher P levels (i.e. >30 in w.g.), and that gas turbine operational limits on
filter differential pressure will be met long before
element safety issues are met. The power company
policy or gas turbine manufacturers operational
policy sets limits on maximum dirty air filter P levels. Filter elements should also be removed & replaced
when filter media characteristics have
deteriorated due to time, weather, or other
circumstances. Specific problems? Donaldson's lab analysis can help you discover
exactly what kind of particulate your filters encounter
in your environment. Just send us one filter element
after it's been installed under operation for at least 2
years, and we'll send back filter media change
recommendations that will enable you to increase
turbine output, as well as improve protection against
contamination problems specific to your site. Call us
for details. Filter Product Warranty Donaldson warrants all the filters we manufacture
against defects in materials and workmanship for 2
years from time of manufacture, provided normal
operating conditions prevail and our
procedures for storage, service, and
care are followed. Note that washing of our filters is never
recommended. See why on page 5 of this document.
(Also, refer to our detailed warranty statement on our
website: www.donaldson.com) Use only genuine Donaldson replacement filter
elements in your Donaldson Air Filter System. For
information about Donaldson replacement elements,
call us at one of the offices listed on the last page of
this document. Eye and Ear Safety Shut off the pulse-cleaning mechanism during servicing
of the filter elements. Pulses of air are potentially
dangerous if the pulse occurs too close to the
operators eardrums or eyes. We recommend that eye protection be worn at all
times, in the filter system during turbine and/or air
filter operation. The filter retention bolts that protrude
from the elements pose possible danger to the eyes of
maintenance personnel. WARNING! Wear eye and ear protectors when you are near elements being pulsed-cleaned. Eye damage
may result from the pulse jet hitting the eyes and ear
damage from the noise emitted during the pulsing of
the elements. Off-Gassing Hazard WARNING! The filter media installed in your Donaldson air filter system contains formaldehyde.
Formaldehyde is known to be a potential carcinogen,
and can act as an irritant and sensitizer of the skin,
eyes, and respiratory tract. Media Fire Hazard WARNING! All media used in this filtration system are combustible. Use all cautions necessary to make
sure that media is kept clear of all heat sources. Do not smoke or weld near the air filtration system.
All welding must be done prior to installation of the
inlet hood treatment, air conditioning media or
filtration media. Filter Element Storage CAUTION! Damage to replacement filter elements can occur if they are not properly protected from
exposure to weather. They should be kept inside a
building and NOT left in pallets outside. If storing
elements inside a building is not possible, store them so
that they are protected from exposure to weather. The
crates in which the elements are shipped are not
sufficient protection from weather. Use of Substitute Replacement Filters Performance (filtration efficiency and pressure drop) of
the Donaldson Air Filter System is directly related to
the use of high quality, high performance Donaldson
filter elements. Donaldson Company does not warrant
the performance of our filter system that is not
equipped with genuine Donaldson filter elements. Visual Inspection of Elements Visually inspect filter elements on a regular basis, at
least every 3 months. Look for any evidence of: ! dust leakage through the media, ! holes or damage to the media, ! damage to the gasket seal. If any damage is detected, elements should be
immediately replaced. Always handle new elements with care. They look
sturdy, but dropping them or denting them can result
in holes in the media, improper sealing and/or fit, or
other potentially damaging situations. If an element has been damaged in shipping, do not use it! For maximum handling protection, when its time for
filter changeout, keep elements in their original cartons
and lift them into the filter house. Take care when installing new filter
elements so that the yoke bolt doesnt
inadvertantly poke through the inner
liner and damage the media. Correct! Incorrect! Filter Element Replacement Air filter element replacement must be done during
turbine downtime. Although the elements are
replaceable while the turbine is running, for maximum
turbine protection, Donaldson recommends replacing
only while the rotating equipment is at standstill. As
filter handling can be awkward, we recommend that
filter changeout be done by two people.
1. Shut off compressed air supply.
2. Remove dirty elements.
3. Inspect support yokes and replace any damaged legs.
4. Install new elements. 1) Shut Off Compressed Air Supply If a GDX (pulsed) filtration system, shut down the
compressed air supply and ensure that the line pressure
is at zero before proceeding. If a GDS (non-pulsed)
system, procede to next step. 2) Remove Dirty Elements ! Brush or vacuum clean the dust that has accumulated over the elements at the tube sheet and
any other location, or it might fall into the clean air
side during changeout. ! Remove the nut and gasket washer from the yoke assembly that secures the elements to the yoke
assembly. Retain nut and washer for replacement. ! Carefully slide the elements off one at a time from support yoke. Take care not to damage the yoke. ! Dispose of dirty elements in an environmentally- friendly manner. 3) Inspect Support Yokes ! Inspect elements support yokes for damage. Note that the yokes are not made to bear any more weight
than the element pair (about 75 lbs/ 33 Kg.) Any
excessive load will damage the yoke, create bad
alignment of the filter element and result in a poor seal
between the tubesheet and the element. If a person
inadvertantly steps on one and breaks it, Donaldson
has replacement yoke kits available from our
aftermarket dept. Call for part numbers. ! Make sure that the element retention yokes are centered on the tube sheet hole to ensure proper
element sealing between the element and the tube
sheet. Donaldson filter element pairs are mounted together on a yoke assembly that extends from the tubesheet through the inside of the filters. The yoke legs are held together at the far end with a nut & gasket washer on the threaded end protruding from the end of the element. Yoke assemblies are usually retained for use with the new elements. (If a yoke assembly is damaged, it must be replaced.) 4) Install New Elements ! Slide the rear-most element (the conical or the largest conical) on first, taking care not to knock the
inner liner against the retention bolt. If damage
occurs, such as a hole, do not use the element. ! Slide the 2nd element (either the cylindrical or the smaller conical) onto the yoke, again taking care to
avoid internal damage, and making sure the yoke bolt
protrudes from the hole in the endcap of the element.
Gently push the 2nd element toward the rear element
so that the seal snugs up to it. ! Place gasket washer & nut over threaded yoke stud. Tighten element retention nut between 6 ft/lbs
(8 nm) and 10 ft/lbs (13 nm) to assure airtight seal
between element gasket and tube sheet. ! If the correct torque has been done, but filters can still be rotated around axis, further tighten the nut, not
exceeding 15 ft/lbs (20.3 nm.) CAUTION: Torque exceeding 15 ft/lbs (20.3 nm) can cause the end cap to
compress the inner and outer liners, damaging the
filter elements. ! Note that air filter system requires the installation of both conical and cylindrical filter elements. Premium Protection: Synthetic Media Our man-made fibers, with their
controlled fiber diameter and pore
size, result in superior dust-holding
capacity and low impedence to
airflow. It helps keep P low throughout the entire life of the
filter, which is typically 2 to 4
years, depending on the harshness
of the environment. Synthetic
media is sturdy and durable, even
under normal-filter-killing
conditions such as consistent or
prolonged moisture, sticky/wet
hydrocarbons, salt, or very dusty/
sandy. Synthetic media is the basis for the
best filtration performance in most
cases. Donaldson Offers a Wide Choice of Media so That You Can Choose the Best Filter for Your Particular Environment! Outstanding Protection: Duratek Media Our special blend of synthetic and
natural fibers, which we call
Duratek , is designed to resist the intermittant moisture that power
plants and oil/gas field operations
so often deal with, such as morning
fog and coastal storms. Because of
the synthetic fibers and the addition
of certain resins, Duratek with- stands harsh conditions, including
high humidity and wet tropical
environments. This cost-effective
blend offers low P, little or no media swelling/bunching, and high
dust holding capacity. Increase Media Power by Adding Spider-Web
The web site itself may have changed. You can check the current page or check for previous versions at the Internet Archive. Yahoo! is not affiliated with the authors of this page or responsible for its content. GTS-501_ele_changeout Tech Topics GTS-501 Rev 6/04 Filter Pair Replacement Procedures for Pulsed (GDX) and Non-Pulsed (GDS) Filters In the Donaldson GDX Air Inlet Self-Cleaning
(pulsed) Filtration Systems and the GDS Air Inlet
Static (Non-Pulsed) Filtration Systems, 2 filters
(one conical + one cylindrical, or two conicals)
are paired and mounted horizontally to provide
superior turbine protection. When to Service Donaldson Filter Element Pairs The filter elements should be removed if the dirty filter P (differential pressure) is higher than the operational guidelines. For instance, if dirty filter P is at 5.2 in. w.g. and the recommendations are for
maximum dirty filters at 5.0 in. w.g., then its time for
changeout. It is important to note that the dirty filter
element can safely accommodate higher P levels (i.e. >30 in w.g.), and that gas turbine operational limits on
filter differential pressure will be met long before
element safety issues are met. The power company
policy or gas turbine manufacturers operational
policy sets limits on maximum dirty air filter P levels. Filter elements should also be removed & replaced
when filter media characteristics have
deteriorated due to time, weather, or other
circumstances. Specific problems? Donaldson's lab analysis can help you discover
exactly what kind of particulate your filters encounter
in your environment. Just send us one filter element
after it's been installed under operation for at least 2
years, and we'll send back filter media change
recommendations that will enable you to increase
turbine output, as well as improve protection against
contamination problems specific to your site. Call us
for details. Filter Product Warranty Donaldson warrants all the filters we manufacture
against defects in materials and workmanship for 2
years from time of manufacture, provided normal
operating conditions prevail and our
procedures for storage, service, and
care are followed. Note that washing of our filters is never
recommended. See why on page 5 of this document.
(Also, refer to our detailed warranty statement on our
website: www.donaldson.com) Use only genuine Donaldson replacement filter
elements in your Donaldson Air Filter System. For
information about Donaldson replacement elements,
call us at one of the offices listed on the last page of
this document. Eye and Ear Safety Shut off the pulse-cleaning mechanism during servicing
of the filter elements. Pulses of air are potentially
dangerous if the pulse occurs too close to the
operators eardrums or eyes. We recommend that eye protection be worn at all
times, in the filter system during turbine and/or air
filter operation. The filter retention bolts that protrude
from the elements pose possible danger to the eyes of
maintenance personnel. WARNING! Wear eye and ear protectors when you are near elements being pulsed-cleaned. Eye damage
may result from the pulse jet hitting the eyes and ear
damage from the noise emitted during the pulsing of
the elements. Off-Gassing Hazard WARNING! The filter media installed in your Donaldson air filter system contains formaldehyde.
Formaldehyde is known to be a potential carcinogen,
and can act as an irritant and sensitizer of the skin,
eyes, and respiratory tract. Media Fire Hazard WARNING! All media used in this filtration system are combustible. Use all cautions necessary to make
sure that media is kept clear of all heat sources. Do not smoke or weld near the air filtration system.
All welding must be done prior to installation of the
inlet hood treatment, air conditioning media or
filtration media. Filter Element Storage CAUTION! Damage to replacement filter elements can occur if they are not properly protected from
exposure to weather. They should be kept inside a
building and NOT left in pallets outside. If storing
elements inside a building is not possible, store them so
that they are protected from exposure to weather. The
crates in which the elements are shipped are not
sufficient protection from weather. Use of Substitute Replacement Filters Performance (filtration efficiency and pressure drop) of
the Donaldson Air Filter System is directly related to
the use of high quality, high performance Donaldson
filter elements. Donaldson Company does not warrant
the performance of our filter system that is not
equipped with genuine Donaldson filter elements. Visual Inspection of Elements Visually inspect filter elements on a regular basis, at
least every 3 months. Look for any evidence of: ! dust leakage through the media, ! holes or damage to the media, ! damage to the gasket seal. If any damage is detected, elements should be
immediately replaced. Always handle new elements with care. They look
sturdy, but dropping them or denting them can result
in holes in the media, improper sealing and/or fit, or
other potentially damaging situations. If an element has been damaged in shipping, do not use it! For maximum handling protection, when its time for
filter changeout, keep elements in their original cartons
and lift them into the filter house. Take care when installing new filter
elements so that the yoke bolt doesnt
inadvertantly poke through the inner
liner and damage the media. Correct! Incorrect! Filter Element Replacement Air filter element replacement must be done during
turbine downtime. Although the elements are
replaceable while the turbine is running, for maximum
turbine protection, Donaldson recommends replacing
only while the rotating equipment is at standstill. As
filter handling can be awkward, we recommend that
filter changeout be done by two people.
1. Shut off compressed air supply.
2. Remove dirty elements.
3. Inspect support yokes and replace any damaged legs.
4. Install new elements. 1) Shut Off Compressed Air Supply If a GDX (pulsed) filtration system, shut down the
compressed air supply and ensure that the line pressure
is at zero before proceeding. If a GDS (non-pulsed)
system, procede to next step. 2) Remove Dirty Elements ! Brush or vacuum clean the dust that has accumulated over the elements at the tube sheet and
any other location, or it might fall into the clean air
side during changeout. ! Remove the nut and gasket washer from the yoke assembly that secures the elements to the yoke
assembly. Retain nut and washer for replacement. ! Carefully slide the elements off one at a time from support yoke. Take care not to damage the yoke. ! Dispose of dirty elements in an environmentally- friendly manner. 3) Inspect Support Yokes ! Inspect elements support yokes for damage. Note that the yokes are not made to bear any more weight
than the element pair (about 75 lbs/ 33 Kg.) Any
excessive load will damage the yoke, create bad
alignment of the filter element and result in a poor seal
between the tubesheet and the element. If a person
inadvertantly steps on one and breaks it, Donaldson
has replacement yoke kits available from our
aftermarket dept. Call for part numbers. ! Make sure that the element retention yokes are centered on the tube sheet hole to ensure proper
element sealing between the element and the tube
sheet. Donaldson filter element pairs are mounted together on a yoke assembly that extends from the tubesheet through the inside of the filters. The yoke legs are held together at the far end with a nut & gasket washer on the threaded end protruding from the end of the element. Yoke assemblies are usually retained for use with the new elements. (If a yoke assembly is damaged, it must be replaced.) 4) Install New Elements ! Slide the rear-most element (the conical or the largest conical) on first, taking care not to knock the
inner liner against the retention bolt. If damage
occurs, such as a hole, do not use the element. ! Slide the 2nd element (either the cylindrical or the smaller conical) onto the yoke, again taking care to
avoid internal damage, and making sure the yoke bolt
protrudes from the hole in the endcap of the element.
Gently push the 2nd element toward the rear element
so that the seal snugs up to it. ! Place gasket washer & nut over threaded yoke stud. Tighten element retention nut between 6 ft/lbs
(8 nm) and 10 ft/lbs (13 nm) to assure airtight seal
between element gasket and tube sheet. ! If the correct torque has been done, but filters can still be rotated around axis, further tighten the nut, not
exceeding 15 ft/lbs (20.3 nm.) CAUTION: Torque exceeding 15 ft/lbs (20.3 nm) can cause the end cap to
compress the inner and outer liners, damaging the
filter elements. ! Note that air filter system requires the installation of both conical and cylindrical filter elements. Premium Protection: Synthetic Media Our man-made fibers, with their
controlled fiber diameter and pore
size, result in superior dust-holding
capacity and low impedence to
airflow. It helps keep P low throughout the entire life of the
filter, which is typically 2 to 4
years, depending on the harshness
of the environment. Synthetic
media is sturdy and durable, even
under normal-filter-killing
conditions such as consistent or
prolonged moisture, sticky/wet
hydrocarbons, salt, or very dusty/
sandy. Synthetic media is the basis for the
best filtration performance in most
cases. Donaldson Offers a Wide Choice of Media so That You Can Choose the Best Filter for Your Particular Environment! Outstanding Protection: Duratek Media Our special blend of synthetic and
natural fibers, which we call
Duratek , is designed to resist the intermittant moisture that power
plants and oil/gas field operations
so often deal with, such as morning
fog and coastal storms. Because of
the synthetic fibers and the addition
of certain resins, Duratek with- stands harsh conditions, including
high humidity and wet tropical
environments. This cost-effective
blend offers low P, little or no media swelling/bunching, and high
dust holding capacity. Increase Media Power by Adding Spider-Web
