Basics For Filter Qualifications Flashcards
What is the rotary float control valve?
It is the “brain” of the filter.
What material is the filter made of?
Copper nickel
How often do you take visual samples?
Every 15 minutes.
When first entering the filter room what are the first things you should check?
- Air vent (if no air go to load center to turn on)
- Communications
- AFOSS
- Fire extinguishers
- Emergency eye wash system (s11)
- EEBD
When labeling a fuel sample what three parts are included?
- Tank number
- Time
- Location
What is the ball made of in the sight glass?
Kerosine filled ball
Why is the air vent situated low to the deck?
So that it can remove any fumes, which are heavier than air, and thus would be low to the deck.
What steps do you take to get to manned and ready?
- Open Automatic water drain
- Open 6 isolation valves
- Open sight glass valves
The inlet pipe to the filter has what kind of valve?
High performance butterfly valve.
Give a few reasons why the filter would be bypassed?
- If under emergency purposes the filter is not working and the pump-room needs to quickly fuel jets.
- When going into port a fuel drain back is required.
How many elements are in the filter?
192
How many separators are in the filter?
58
How many coelescers are in the filter?
134
How many chambers are in the filter?
3 (inlet=top, fallout=middle, outlet=bottom)
Where are the locations of the load centers for filter 1 & 2? For 3 & 4?
2-49-2-Q
2-222-2-Q
The service filter is designed to remove what % of contaminates? % of water?
98% of contaminates. 100% of water.
Why is the filter dome shaped?
To provide uniform flow to the coalescing elements simultaneously.
Fuel flow through the separator elements is __________.
outside in
Fuel flow through the coalescing elements is ____________.
inside out
For installing elements the end cap bolts should be tightened to _______.
144 inch/12 ft. per pound
For a system drain-back what do you open?
riser, bypass valve, cross-connect, forward and aft legs.
What do you open for a filter drain back?
filter vent and the manual water drain
What are the tac #’s designated contamination tanks for the filters? What is the tac # for contam tank used for midship?
1 Filter: 44-3 2 Filter: 44-4 3 Filter: 205-7 4 Filter: 205-8 Midship (1bravo): 140-2
How many steps are on the latter-well?
7
How many bolts are on the man-hole?
32
How long is the coalescing element? How wide in diameter?
24 inch. long
3 5/8 inch. diameter
What material is the coalescing element made of?
Pleated paper element encased by fiberglass wrappings which are held in place by a cloth sleeve.
What are the dimensions of a separator element?
24 inches long and 3 5/8 inches in diameter.
What is a separator element made of?
Perforated inner brass core cover with a 200-mesh monol teflon coated screen. It is inclosed by an aluminum screen.
How do you align the filter according to AFOSS?
- Make sure the following valves are closed:
A. Filter inlet valve B. Filter outlet valve C. Filter manual water drain valve D. Filter bypass valve (locked shut) E. Filter sample/test cutout valve F. Filter inlet and outlet test valves G. * Jet engine test supply valve (assistance required)
Open the following:
A. Filter room riser valve
B. Filter crossover valve
C. Filter outlet isolation valves (i.e. FWD and AFT legs)
D. Filter automatic water drain
E. Filter vent valve to contamination tank
How often do you take samples to QA?
According to AFOSS every 4hr., every 2hr. as currently dictated by V4, and when switching tanks.
What is another name for the outlet chamber?
clearwell
Separator elements are considered permanent and only replaced if________.
damaged
What is the hydrophobic screen?
A 60-mesh wire screen coated with teflon that separates the elements and prevents water droplet impingement on the separator elements
When is a element test, inspection, and replacement done?
- Every 30 months
- When fuel samples indicate solids/water passing through elements
- When maximum pressure drop across the filter (differential pressure) housing exceeds 15 PSI
- When filter is drained and remains emptied for 7 days or longer
Operation of the Filter Hydraulic Control System is tested in accordance with PMS using what?
The X-75 Float Tester (lifts the float to simulate excessive water in the filter)
What kind of valve is the filter outlet valve?
modified globe valve
What is the flow rate of the filter?
2,000 GPM
What is the dry weight of the filter? What is the weight under operating conditions?
10,000 pounds dry and 22,000 normal
How much JP5 does the filter hold?
12,000 pounds
How many valves does the filter hydraulic control system have? Where do connections lead?
4 valves (VASP=vent, automatic water drain, supply, pilot)
- the system consists of 3 hydraulic control valves and 1 float operated rotary control valve. Two hydraulic control valves (automatic shutoff valve and pilot valve are located in the filter discharge line. The other hydraulic control valve (automatic water drain valve) is located in the filter sump drain line. The float operated control valve (rotary valve)
When the float is in the up position what valves are open/closed? In the horizontal position? In the down position?
Up position: pilot valve is closed, automatic shutoff is closed, automatic water drain is open.
Horizontal position: all three are open
Down position: pilot is open, automatic shutoff is open, automatic water drain is closed.
