5
2.0 Operation
Donotoperatelteratpressuresinex-
cessofMaximumWorkingPressureindicatedonSerial
NumberTag.
NOTE:MaximumOperatingTemperature-150°F,
66°C.Liquidltrationabove120°F,49°Cisnotrecom-
mendedsincethereistypicallyoilpresentinavapor
statewhichpassesthroughthelterandcondenses
downstream.
NOTE:Grade1-Ifoperatedabove100°F,38°C,a
Grade1ltermayexperiencelessthan1000hoursof
lifebecauseofgreateroilvaporcontent.
A. Operational Checkpoints
Grades 11,9,7,6,5,3
1. Grades9,7,6,5,3-Checkpressuredropacrossthe
lter
a. Pressuredifferentialinexcessof6psi(0.42kgf/
cm2)-pressureindicatorinredarea-indicates
thattheltersleeveorelementshouldbe
replaced.
NOTE:Elementshouldbechangedannuallyorwhen
indicatorchangestored,whicheveroccursrst.
NOTE:Pressuredropshouldneverexceed15psi
(1.0kgf/cm2).
NOTE:Grades9,7,5,3-Pressuredropmaytemporar-
ilyincreasewhenowisresumedafterowstoppage.
Pressuredropshouldreturntonormalwithinone
hour.
b. Checkforsuddenreductioninpressuredrop.
Thismightindicate:
(1) Possibleleakacrosselemento-ringseal
(2) Leakthroughtheelementduetophysical
damage
2. Checkow,pressure,andtemperaturetomake
certainlterisbeingoperatedwithindesign
conditions.
3. Grades11,9,7,5,3-Checktoseethatlteris
installedleveltoinsureproperdrainage.
4. Grades11,9,7,5,3-Checkthatmanualdrainsare
drainedperiodicallyorthatautomaticdrainsare
functioning.
Grade 1
1. Checkforanoilysmellbyopeningthemanual
valve.Ifanoilysmellexists,thefollowingshould
bechecked:
a. Filterelementadsorptioncapacityexhausted
b. Leakacrosselemento-ringseal
c. Leakthroughelementduetophysicaldamage
d. Presenceofliquidsbecauseoflackoforfailure
ofprelters
e. Flow,pressureandtemperaturesoutsidede-
signconditions
f. Presenceofgaseousimpuritieswhichcannot
beadsorbedbyactivatedcarbon
Methane,carbonmonoxide,carbondi-
oxideandvariousinorganicgasescannotberemoved
byaGrade1lter.
C. Flow Capacity
Maximumairowforthevariousltersat100psig
(7kgf/cm2)isindicatedinTable1.Todetermine
maximumairowsatinletpressuresotherthan100
psig(7kgf/cm2),multiplyowfromTable1byairow
correctionfactorfromTable2thatcorrespondstothe
minimumoperatingpressureattheinletofthelter.
NOTE:Filtersshouldnotbeselectedbypipesize.
Selectusingowrateandoperatingpressureonly.
Table 1 - Maximum Flow @100 psig [
7 kgf/cm
2
]
Housing scfm [m3/hr]
52 625 [1110]
54 1000 [1700]
56 1250 [2125]
60 1875 [3158]
64 2500 [4250]
68 3125 [5310]
72 5000 [8490]
76 6875 [11,670]
80 8750 [14,850]
84 11,875 [20,175]
88 16,250 [27,610]
92 21,250 [36,100]
Table 2 - Air Flow Correction Factor
Maximum
Inlet
Pressure
psig 20 30 40 60 80 100 125 150 175 200
kgf/cm21.4 2.1 2.8 4.2 5.6 7.0 8.8 10.6 12.3 14.1
Correction Factor 0.30 0.39 0.48 0.65 0.82 1.00 1.22 1.43 1.65 1.87
Maximum
Inlet
Pressure
psig 250 300 350 400 450 500 550 600 650 700
kgf/cm217.6 21.1 24.6 28.1 31.6 35.2 38.7 42.2 45.7 49.2
Correction Factor 2.31 2.74 3.18 3.62 4.05 4.49 4.92 5.36 5.80 6.23
