Last Chance Filters (LCFs) product photo Primary L

Last Chance Filters (LCFs)

Last Chance Filters provide point-of-use component protection and help to prevent sudden, catastrophic failure in fluid systems

They are installed immediately upstream of sensitive or critical components (e.g. nozzles, valves) and are designed to supplement the main system filters.

Features

  • Laser drilled
  • Sinterered, woven mesh (Rigimesh®)
  • Composite mesh available
  • Standard ranges (sizes, ratings)
  • High collapse and burst ratings
  • Absolute filtration ratings from 15 to 450 micron.

Benefits

  • Suitable for high pressure applications
  • Suitable for bi-directional flow applications
  • High strength
  • Puncture resistance
  • Fatigue resistance
  Aerospace Products

How Does it Work?

Even though the main system filter may be very effective, there can still be large particulate contamination generated within the fluid system, downstream of the main filter, e.g. built-in contaminants, break-in wear debris, servicing and maintenance contamination.

The secondary, Last Chance Filters, trap particles such as machining chips, burrs, seal material, wear particles and fluid breakdown products.

In general, there are four conditions when a Last Chance Filter should be considered by the system designer:

  • Components related to flight safety
  • Components downstream from known sources of large particles
  • Dead-end components or those not flushed during actuation
  • Components with orifice diameters of 112 in. (2mm) or less

Typical Locations

A Last Chance Filter can be installed in one or more of these places in a system:

  • Immediately upstream of the component to be protected.
  • Inside the component, as an integral part of the assembly.
  • At the normal outlet of a contamination-vulnerable component that experiences reverse flow.

Example Installations

Swaged In Connecting Bobbin Tri-Dot Union mounted
Disc Manifold Port Boss Screensert
   
In-Pipe

 

Last Chance Filter Cleaning System

Pall Last Chance Filters are manufactured in strictly controlled conditions. The filtration meshes are already chemically clean due to the sintering process which vaporises surface contaminants.

In addition, particularly for space applications, Pall has built a special flushing rig which achieves cleanliness levels of NAS class 00 or better. Once the desired cleanliness level has been achieved, the LCF is removed and vacuum-packed for transportation.

  LCF Cleaning Rig

Note: special handling precautions must be taken on opening the package to ensure that the minimum of contamination is introduced.



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Description

Last Chance Filters provide point-of-use component protection and help to prevent sudden, catastrophic failure in fluid systems

They are installed immediately upstream of sensitive or critical components (e.g. nozzles, valves) and are designed to supplement the main system filters.

Features

  • Laser drilled
  • Sinterered, woven mesh (Rigimesh®)
  • Composite mesh available
  • Standard ranges (sizes, ratings)
  • High collapse and burst ratings
  • Absolute filtration ratings from 15 to 450 micron.

Benefits

  • Suitable for high pressure applications
  • Suitable for bi-directional flow applications
  • High strength
  • Puncture resistance
  • Fatigue resistance
  Aerospace Products

How Does it Work?

Even though the main system filter may be very effective, there can still be large particulate contamination generated within the fluid system, downstream of the main filter, e.g. built-in contaminants, break-in wear debris, servicing and maintenance contamination.

The secondary, Last Chance Filters, trap particles such as machining chips, burrs, seal material, wear particles and fluid breakdown products.

In general, there are four conditions when a Last Chance Filter should be considered by the system designer:

  • Components related to flight safety
  • Components downstream from known sources of large particles
  • Dead-end components or those not flushed during actuation
  • Components with orifice diameters of 112 in. (2mm) or less

Typical Locations

A Last Chance Filter can be installed in one or more of these places in a system:

  • Immediately upstream of the component to be protected.
  • Inside the component, as an integral part of the assembly.
  • At the normal outlet of a contamination-vulnerable component that experiences reverse flow.

Example Installations

Swaged In Connecting Bobbin Tri-Dot Union mounted
Disc Manifold Port Boss Screensert
   
In-Pipe

 

Last Chance Filter Cleaning System

Pall Last Chance Filters are manufactured in strictly controlled conditions. The filtration meshes are already chemically clean due to the sintering process which vaporises surface contaminants.

In addition, particularly for space applications, Pall has built a special flushing rig which achieves cleanliness levels of NAS class 00 or better. Once the desired cleanliness level has been achieved, the LCF is removed and vacuum-packed for transportation.

  LCF Cleaning Rig

Note: special handling precautions must be taken on opening the package to ensure that the minimum of contamination is introduced.

Applications

Pall's Last Chance Filters provide fluid system protection for a wide variety of applications………

  • Engine Lube & Fuel Systems
  • Hydraulic Systems
  • Helicopter Transmission Lube systems
  • Avionics (E/E) Cooling systems
 


Photo Courtesy of the U.S. Army.


   

For more information, contact your local Pall sales representative or e-mail: aerospace@pall.com

Type
Cartridges and Elements
Use
Filtration
Ordering Information

Last Chance Filter discs are available in a wide range of shapes and sizes.

For more information, contact your local Pall sales representative or e-mail: aerospace@pall.com

    USA Part Numbers European Part Numbers
DISC / MESH FORMS 20001-*-*
20020-*-*
21041-*-*-*
21042-*-*-*
22000-*-*
25587-*-*
26061-*-*
27386-*-*-*
2CR0364
3CR0442
3CR0662
QA10200
QA2118
QA10200

FLANGE MOUNTED FILTERS

20666-*-*
21496-*-*-*
21623-*-*-*
21888-*-*
25274-*-*
25656-*-*
25972-*-*
26327-*-*-*-*
26360-*-*-*-*
2CR6538
3CR0682
3CR0692
QA03136-3165
QA03675-3704
QA03532
QA08121
QA11250
QA11270

FILTER FITTINGS

includes ScreensertTM and Tri-DotTM
20011-*-*
20030-*-*
20065-*-*
20261SL-*-*
20535-*-*-*
20549-*-*
20575-*-*
20576-*-*
20601-12-*
20934-*-*
20935-*-*-*
21243-*-*
25692-*-*-*
2CR7445
3CR0295
3CR0317
3CR0318
3CR0438
3CR0570
3CR0627
3CR0746
3CR0757
30799
3CR0805
30868FF-*-*-*
QA03392
QA04120-4140
QA05990
QA06045
QA06454
QA06998
QA07295
QA07312
QA07415
QA07978
QA08189
FILTER ASSEMBLIES 2CR2086
2CR2103
2CR8936
3CR0167
3CR0453
3CR0475
3CR0556
30866FA[G]
QA03947
QA07977
WASH FLOW FILTERS 2CR8224
2CR8534
2CR9076
2CR9242
3CR0288
3CR0482
 
LASER DRILLED LCFs Parts beginning
2CR or
3CR or
31000
 
Application
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Segment
Commercial - Fixed Wing
Commercial - Rotary Wing
Marine - Commercial Vessels
Marine - Naval Submarines
Marine - Naval Surface Ships
Military - Fixed Wing
Military - Rotary Wing
Military - Vehicles