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pertaining to aviation filtration.
9. What is the operation of a Water Probe?
The water probe detects the level of water
electronically and then can open and close the auto water drain
valve or slug valve, shut down pump and send alarm to control panel.
10. What is the reason for a Clay Treater?
The clay treater removes surfactants from
fuel to allow filter/separators to perform properly. The surfactants
will disarm the coalescer elements.
11. What is the function of the vessel heaters?
The heater keeps water from freezing in the
sump and drain lines.
12. What data do you need to know to size a vessel?
Refer to Application Data Sheet in your catalog.
13. Which should be used, clay bags or canisters?
Canisters have gaskets that improve sealing
and have less chance of bypassing. Bags, on the other hand, hold
more clay and cost about 40% less.
14. Can clay bags be used in Velcon vessels?
Not usually. Velcon vessels are built similar
to “M” series filter vessels except without adaptors for
cartridge sealing. They use center rods, center seals, and end caps.
There are conversion kits but are cost prohibitive. Two things to
remember, this can be a tremendous selling tool for Facet vessels,
but it does add additional cost.
15. What colors are used for what fuels?
>>Jet - Clear
>>AV Gas - Blue
>>High Sulfur Diesel - Red.
16. Can dye (color) in fuels be removed?
In most instances, the answer is no.
17. Why use horizontal versus vertical housing?
Space and ease of maintenance.
18. Should a filter be installed upstream of a filter separator?
It depends on the application. If the customer
is having a problem with solids you should definitely have a micronic
filter in front of your filter/separator. The micronic filter is
anywhere from a third to a fourth of the cost and has four times
the surface area.
19. How do we test for water?
Aquaglo test (Jet Fuel only, Free Water).
Carl Fisher measures total water.
20. What is the difference between free and entrained and dissolved
water?
1. Free water is created when the fuel
has all the water it can dissolve plus more. This extra water
is then free water. Free water is usually not visible as a haze
until you get above 30 to 40ppm free water. This free water is
all that a coalescer or absorbent cartridge can remove.
2. Entrained water: Discrete water droplets carried by a continuous
liquid or gas phase when water is immiscible with the liquid.
May be separated from the continuous phase by coalescing and gravity
separation. Usually picked up in a system by condensation or a
water washing used in process.
3. Dissolved water is the water that is in solution or basically
not visible in the fuel. The amount
changes with temperature. Fuel holds more water as the temperature
increases.
21. What is the cleaning procedure for Synthetic Separators?
You can clean them in the same manner as the
Teflon Screen separators. Submerge them in clean jet fuel and wipe
them gently with a lint free cloth.
22. How do you perform the water test on Synthetic Separators?
First you should wet the cartridge with clean
jet fuel. Then place the cartridge under a faucet or hose (not more
than 3 inches) and let the water drop gently on the element. The
water should bead and roll off the element.
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