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pertaining to aviation filtration.
1. What is the operational life expectancy of the Teflon® and
Synthetic cartridge?
Facet Teflon® & Synthetic separator
cartridges are cleanable and reusable. They should be inspected
and tested before reusing. Cartridge service life should not be
extended beyond 5 years.
2. What is the shelf life expectancy of the Facet cartridges?
Most elements are a minimum of five years
if sealed and in temperature controlled environment.
3. When do I changeout my filter/separator coalescer?
A. Coalescer elements must be replaced
when:
>>1. Filter Membrane (Milipore®) Test indicates elements
are not performing (Refer to Section 3).
>>2. Differential pressure exceeds 15 psi or there is a sudden
drop in differential pressure.
>>3. Continuous sump samples indicate surfactants, microbial
or solid contaminants.
>>4. 12-month service life has expired and approved extension
procedure is not accomplished.
>>5. Free water detection test indicates elements are not
performing (Ref. Section 3-3).
B. Coalescer Element Time Extension
Although normal coalescer element life is 12 months, the elements’
life may be extended, providing all affected airlines approve the
coalescer element life extension program. Station, fueling agent,
FBO, etc., will submit proposed time extension program in writing.
If accepted, airlines will provide written approval, which must
be available for review.
 4.
Is there a minimum flow rate for filter, filter/separators?
No, however, special consideration must be
given to change-out differential (See
chart).
The only exception is the “HP” style
vessels, which should be operated within 15% of design flow.
5. What is the typical clean differential pressure drop?
>>Filter/separators
2-4 clean at ambient temp.
>>Micronic Filters .5-4 clean at ambient temp.
>>2" Monitors 6-7 clean at ambient temp.
>>6" Monitors 3-4 clean at ambient temp.
6. Typical element change-out recommendations at maximum rated flow.
>>Filter/Separators 15 psi
>>Monitors 25 psi
>>Micronics 15 psi
>>“HP” 15 psi
>>Clays Based on MSEP test
7. What is the rupture pressure for each element?
>>Filter/Separators 75 psi
>>Monitors 180 psi
>>Micronics 75 psi
>>“HP” 15 psi
>>Clays N/A
8. What is the purpose of the Slug valve?
The slug valve stops the flow of product when
excessive water is collected in the filter/separator sump. It works
in conjunction with the float control valve. The slug can also be
furnished with rate of flow control which is used to control flow
through the filter/separator and with a check valve feature to prevent
back-flow.
Note: Teflon is a registered trademarrk of E.I.
Dupont de Nemours Co., Inc.
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