4
2.0 Operation
WARNING: Do not operate filter at pressures in excess of
Maximum Working Pressure indicated on Serial Number
Tag.
NOTE: Maximum Operating Temperature - 150°F, 66°C.
Liquid filtration above 120°F, 49°C is not recommended
since there is typically oil present in a vapor state which
passes through the filter and condenses downstream.
NOTE: Grade 1 - If operated above 100°F, 38°C may
experience less than 1000 hours of life because of greater
oil vapor content.
A. Liquid Draining - Grades 9, 7, 5, 3
NOTE: Collected liquids must be removed to ensure
proper operation.
NOTE: Depressurize slowly, to avoid filter element
damage.
1. Manual Drain - Turn to your right (clockwise) to open
and to your left (counterclockwise) to close.
2. Automatic Drain - Liquids will automatically discharge
when sufficient accumulation occurs.
a. Internal Auto Drains - These drains may be manually
drained by turning to your right (clockwise) to open
and to your left (counterclockwise) to close.
NOTE: Manually drain internal auto
drains daily to verify drain function.
4. Check that manual drains are drained periodically or
that automatic drains are functioning.
Grade 1
1. Check for an oily smell by opening the manual valve. If
an oily smell exists, the following should be checked:
a. Filter element adsorption capacity exhausted
b. Leak across element o-ring seal
c. Leak through element due to physical damage
d. Presence of liquids because of lack of or failure of
prefilters
e. Flow, pressure and temperatures outside design
conditions
f. Presence of gaseous impurities which cannot be
adsorbed
CAUTION: Methane, carbon monoxide, carbon dioxide and
various inorganic gases cannot be removed by a Grade 1
filter.
C. Flow Capacity
Maximum air flow for the various filters is indicated in
Table 1a for Corrosion Resistant Models and Table 1b for
High Pressure Models. To determine maximum air flows at
other inlet pressures, multiply flow from Table 1a or 1b by
air flow correction factor from Table 2a for Corrosion
Resistant Models and Table 2b for High Pressure Models,
that corresponds to the operating pressure at the inlet of
the filter.
NOTE: Filters should not be selected by pipe size. Select
using flow rate and operating pressure only.
B. Operational Checkpoints
Grades 9,7,5,3
1. Check pressure drop across the filter
a. Pressure differential in excess of 10 psi (0.7 kgf/
cm2) - indicates that the filter sleeve or element
should be replaced.
NOTE: Element should be changed annually or when
pressure drop reaches 10 psi (0.7 kgf/cm2), whichever
occurs first.
NOTE: Pressure drop should never exceed 50 psi
(3.5 kgf/cm2).
b. Check for sudden reduction in pressure drop. This
might indicate:
(1) Possible leak across element o-ring seal
(2) Leak through the element due to physical
damage
2. Check flow, pressure, and temperature to make
certain filter is being operated within design
conditions.
3. Check to see that filter is installed level to insure
proper drainage.
Table 1a - Corrosion Resistant Models - Maximum
Flow @100 psig [7 kgf/cm2]
CR Models scfm
[m
3
/min]
12 20
[0.57]
16 35
[1.00]
24 100
[2.9]
28 170
[4.9]
32 250
[7.2]
36 375
[11]
OPEN ( TO RIGHT )
Minimum
Inlet
Pressure
Air Flow Correction Factor
Table 2a - Corrosion Resistant Models
psig 20 30 40 60 80 100 120 150 200 250 300
kgf/cm21.4 2.1 2.8 4.2 5.6 7.0 8.4 10.6 14.1 17.6 21.1
Correction Factor 0.30 0.39 0.48 0.65 0.82 1.00 1.17 1.43 1.87 2.31 2.74
HP Model scfm
[m
3
/min]
24 800
[22.7]
32 2000
[56.6]
Table 1b - High Pressure Model - Maximum Flow
@900 psig [62 bar]
Minimum
Inlet
Pressure
Table 2b - High Pressure Models
psig 400 500 600 700 800 900
kgf/cm228.1 35.2 42.2 49.2 56.3 63.3
Correction Factor 0.45 0.56 0.67 0.78 0.89 1.00
