Edwards
FL 20 K Foreline Trap
Provisional entry — research in progress
This page was generated automatically from cited public sources and hasn't completed the full research pass yet. Every specification shown carries its source; more detail is added as research completes.
The Edwards FL20K is a foreline inlet trap used in clean vacuum systems to prevent back-migration of rotary pump oil mist. The trap achieves 99.7% trapping efficiency using activated alumina sorbent. The trap fits pump models RV3, RV5, RV8, RV12, E2M2, E2M5, E2M8, E2M12, E1M18, E2M18, E2M28 and E2M30 and uses ISO KF25 (NW25) flanges.[1][2][3]
What it is
The Edwards FL20K is a foreline inlet trap for use in vacuum pumping systems. The trap prevents back-migration of oil mist from rotary vane pumps into the vacuum system. The trap body is made of cast aluminum and contains activated alumina sorbent. The FL20K has an ambient operating temperature range of 0 to 50 °C and a maximum internal pressure of 1 bar absolute. The trap has a mass of 1 kg and a sorbent charge of 0.07 kg. The FL20K has dimensions of height 5.5 inches by width 4 inches and a weight of 1.5 lb. The trap is supplied with a can of activated alumina sorbent.[1][2]
How it works
The FL20K uses activated alumina as a sorbent to trap oil mist. The activated alumina sorbent provides exceptional trapping properties for oil mist, with a trapping efficiency of 99.7 percent. The sorbent can be rejuvenated by baking the removable basket containing the sorbent for 2 hours at 250 to 300 degrees Celsius. The trap body is made of aluminum and is fitted with a removable basket containing the sorbent.[1][2][5]
Where it fits in the process flow
Why won't it start?
Documented failure modes, common issues, and field considerations.
- Activated alumina sorbent absorbs water, which may prolong roughing time on successive pump downs.
What do the numbers mean?
Vacuum & pumping6
Dimensions & facilities5
Configuration & options10
What does it need to run?
Site utility requirements, footprint, and infrastructure needed to install and operate this tool. Sourced from public records.
- Maximum internal pressure1 bar absolute, 1 x 10^5 Pa[1]
- Leak tightness (1 bar differential)1 x 10^-6 mbar ls-1, 1 x 10^-4 Pa ls-1[1]
- Compatible pump modelsRV3, RV5, RV8, RV12, E2M2, E2M5, E2M8, E2M12, E1M18, E2M18, E2M28, E2M30[3]
- Leak tightness1 x 10^-6 mbar l/s (1 x 10^-4 Pa l/s)[1]
- Fits pump modelsRV3, RV5, RV8, RV12, E2M2, E2M5, E2M8, E2M12, E1M18, E2M18, E2M28, E2M30[2]
- Inlet/Exhaust flangesISO KF25 (NW25)[2]
Where are the manuals?
Generated from public-source data on file. Enter your email to access — nothing is published; details are routed privately.
Not publicly documented
Field notes
No research found yet — worked with this tool? Share what you know.
Frequently asked questions
What is the trapping efficiency of the FL 20 K for oil mist?
The activated alumina sorbent has exceptional trapping properties for oil mist, at 99.7 percent.[1][2]
What is the sorbent charge mass?
The sorbent charge is 0.07 kilograms.[1]
What are the flange types on the FL 20 K?
The inlet and exhaust flanges are ISO KF25 (NW25).[2]
What is the maximum internal pressure for the FL 20 K?
The maximum internal pressure is one bar absolute, 1 x 105 Pa.[1]
What is the leak tightness of the FL 20 K?
The leak tightness is 1 x 10-6 mbar ls-1, 1 x 10-4 Pa ls-1 at one bar (one hundred kilopascals) differential.[1]
Not publicly documented
The following facts about the FL 20 K Foreline Trap are absent from this record as of this revision. First-hand knowledge or a citation closes a gap; every submission is reviewed before publication.
No publicly documented production dates or lifecycle milestones (introduction, end of production, EOL) for the FL 20 K Foreline Trap are on record.
Answerable by: OEM historical records or a trade-press announcement
No publicly documented variants, configuration options, or revision breakpoints of the FL 20 K Foreline Trap are on record.
Answerable by: an OEM product catalog or an engineer who ordered or specified the tool
The control-system platform and OS era of the FL 20 K Foreline Trap are not on record.
Answerable by: an engineer who operated it or OEM installation records
The process node or technology generation of the FL 20 K Foreline Trap is not on record.
Answerable by: an OEM datasheet or a fab qualification report
No publicly documented compatible parts, consumables, or accessories for the FL 20 K Foreline Trap are on record.
Answerable by: an OEM parts catalog or a service engineer
Sources & citations
Sources (6)Every fact above is drawn from these public sources
- [1]ajvs.com — ajvs.comajvs.com
- [2]idealvac.com — idealvac.comidealvac.com
- [3]chemtechsci.com — chemtechsci.comchemtechsci.com
- [4]Inventory photo
- [5]amazon.com — amazon.comamazon.com
- [6]AVCRAY Edwards FL20K (FL-20-K) Foreline Inlet Trap - for All KF25 Rotary Vane Pumps Part Number A133-05-000: Amazon.com: Industrial & Scientific — amazon.comamazon.com
Last updated Sep 24, 2026.
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