FILTER

Question 0

How many bolts are on the man hole?

Answer 0

32

Question 1

How many elements are there?

Answer 1

192

Question 2

Filters are designed to do what?

Answer 2

Remove 98% of all solids and 100% of entrained water from fuel

Question 3

What are the 2 stages of filtration?

Answer 3

1. Coalescing elements

2. Sepator elements

Question 4

What is the purpose of the coalescing elements?

Answer 4

Surrounded by a hydrophobic screen, it removes solids and coalescing water

Question 5

Define coalescing?

Answer 5

The bringing together of fine particles of entrained water to form large droplets that fall out of the fuel by gravity

Question 6

What is the purpose of separator elements?

Answer 6

Repels the coalesced water droplets that were too small to fall out by gravity

Question 7

What sends an automatic signal to drain to empty accumulated water from the filter sump inside the filter?

Answer 7

Float operated rotary control valve

Question 8

What is the interior of the filter divided into?

Answer 8

Inlet
Fallout
Outlet by tube sheets

Question 9

Coalescing element (what is it made of)?

Answer 9

Pleated paper element encased by fiberglass wrappings.
Fiberglass is held by in place by a cloth sleeve.
Flow through coalescent is inside to outside.

Question 10

Separator element (what is it made out of)?

Answer 10

Consist of perforated inner brass core cover with a 200-mesh, monel and teflon-coated tape.
Screen is also enclosed also by an aluminum screen.
Considered permanent unless damaged.
Flow is outside to inside.

Question 11

Filter inlet chamber?

Answer 11

Fuel flow starts at the inlet chamber.
Dome-shaped to make a flow to get to all of the coalescent elements.
Fuel passes through tube sheet into coalescent elements in the fallout chamber.

Question 12

Fallout chamber?

Answer 12

Largest of the three chambers.
Allows the coalescent water to fall out of the fuel stream by gravity as it flows from coalescent elements to separator elements.
Both elements are installed in this chamber.
Also contains manhole cover, filter vent line, and water receiving sump.

Question 13

Filter vent line?

Answer 13

Installed at the top of the fallout chamber.
Fitted with a bulls eye sight glass.
2 shutoff valves.
One-way check valve that directs fuel back into the contaminated settling tanks.
Filter is vented until a solid stream of fuel is observed in the sight glass.

Question 14

What size solids can seperator elements filter?

Answer 14

Solids larger than 10 microns.

Question 15

What is the pressure drop limit?

Answer 15

15psi or whatever is stated on the manufacture packing.

Question 16

The context of samples are recorded where?

Answer 16

Operating log.

Question 17

Filter hydraulic control system?

Answer 17

Safety device on all filters.
Drains water automatically from the filter sump.
Shuts off filter flow if too much water is present and can’t be drained.

Question 18

What are the 4 hydraulic control valves and their location in the filter hydraulic control system?

Answer 18

Supply, vent, pilot, auto. water

Question 19

Auto shutoff valve?

Answer 19

Opened by filter discharge pressure.

Question 20

What controls the opening and closing of the auto shutoff valve?

Answer 20

Pilot valve and an educator.

Question 21

Auto water drain valve location?

Answer 21

Water drain line from the sump.

Question 22

What is the ball float designed to do?

Answer 22

Float on water and sink in JP-5.

Question 23

What positions does the rotary control valve operate?

Answer 23

Down
Horizontal
Up

Question 24

What are the four ports of the float operated control valve?

Answer 24

1. Vent to the water drain line on discharge side of the auto drain valve.
2. Port to the top of the pilot valve.
3. Port to the top in the auto water drain valve.
4. Supply connection port on top of rotary control valve inside filter vessel fitted with wire mesh strainer.

Question 25

What does the rotary control valve control?

Answer 25

Opening and closing of the auto water drain and pilot valves.

Question 26

X-75 float tester does what?

Answer 26

Mechanically operates the float control valve which makes the auto drain valve to open and close.

Question 27

When is the X-75 float tester performed?

Answer 27

During refueling stations and flushing evolutions.

Question 28

With float in down position the 3 valves are in what position?

Answer 28

Pilot valve- open
Auto shutoff valve- open
Water drain valve- closed

Question 29

With float in horizontal position the 3 valves are in what position?

Answer 29

All are open

Question 30

How many chambers are there and what are the names?

Answer 30

Filter inlet chamber
Outlet chamber
Fallout chamber