TECHNICAL DATA
Fluid: Compressed air
Maximum pressure:
Transparent bowl: 10 bar (150 psig)
Metal bowl: 17 bar (250 psig)
Operating temperature*:
Transparent bowl: -20° to +50°C (0° to +125°F)
Metal bowl: -20° to +65°C (0° to +150°F)
* Air supply must be dry enough to avoid ice formation
at temperatures below +2°C (+35°F).
Particle removal: Down to 0,01 µm
Air quality: Within ISO 8573-1, Class 1 (particulates) and
Class 2 (oil content)
Maximum remaining oil content in outlet air: 0,01 ppm at
+20°C (+70°F) with an inlet concentration of 17 ppm
Maximum flow at 6,3 bar (90 psig) inlet pressure to
maintain stated oil removal performance:
F74C: 16 dm
3
/s (33.9 scfm)
F74H: 28 dm
3
/s (59.3 scfm)
Nominal bowl size: 0,2 litre (7 fluid ounce)
Manual drain connection: 1/8"
Automatic drain connection: 1/8"
Automatic drain operating conditions (float operated):
Bowl pressure required to close drain: Greater than 0,3
bar (5 psig)
Bowl pressure required to open drain: Less than 0,2 bar
(3 psig)
Minimum air flow required to close drain:
1 dm
3
/s (2 scfm)
Manual operation: Depress pin inside drain outlet to
drain bowl
Materials:
Body: Aluminum
Bowl:
Transparent with guard: Polycarbonate, steel guard
Metal: Aluminum
Metal bowl liquid level indicator lens: Transparent
nylon
Element: Synthetic fibre and polyurethane foam
Elastomers: Neoprene and nitrile
Mechanical service indicator materials:
Body: Transparent nylon
Internal parts: Acetal
Spring: Stainless steel
Elastomers: Nitrile
REPLACEMENT ITEMS
Service kit (includes items
circled on exploded view) ......................................4380-730
Liquid level lens kit (34, 36, 37, 38) ..........................4380-050
Filter element:
F74C (51, 52) .................................................................. 4344-01
F74H (53, 54) .................................................................. 4344-02
Manual drain (18, 19, 20) (28, 29, 30) ...........................619-50
Automatic drain (21, 22, 23) (31, 32, 33):
1/8 NPT outlet ............................................................... 3000-10
G 1/8 outlet .................................................................... 3000-97
Mechanical service Indicator (1) ................................. 5797-50
Electrical service Indicator (8) ....................................4020-51R
INSTALLATION
1. Shut-off air pressure. Install filter in air line -
l
vertically (bowl down),
l
with air flow in direction of arrow on body,
l
upstream of regulators, lubricators, and cycling
valves,
l
as close as possible to the air supply when used as a
main line filter,
l
as close as possible to the device being serviced
when
used as a final filter.
2. Connect piping to proper ports using pipe thread
sealant on male threads only. Do not allow sealant to
enter interior of unit.
3. Flexible tube with 3mm (0.125") minimum I.D. can be
connected to the automatic drain. Avoid restrictions in
the tube.
4. Push bowl, or bowl with guard, into body and turn
fully clockwise before pressurizing.
5. Install a Norgren general purpose filter with a 5 µm
element upstream of the oil removal filter to obtain
maximum element service life.
SERVICING
1. Open manual drain to expel accumulated liquids. Keep
liquids below element (51, 53).
2. Replace filter element when pressure drop across
element exceeds 0,7 bar (10 psig). The mechanical
service indicator shows approximately full red and the
optional electrical service indicator provides an
electrical output when pressure drop across element
reaches
0,7 bar (10 psig).
DISASSEMBLY
1. Filter can be disassembled without removal from air
line.
2. Shut off inlet pressure. Reduce pressure in inlet and
outlet lines to zero.
3. Remove bowl - push into body and turn
counterclockwise.
4. Disassemble in general accordance with the item
numbers on exploded view. Do not remove the drains
or the service indicators (1, 8) unless replacement is
necessary. Remove and replace only if they
malfunction.
CLEANING
1. Element (51, 53) cannot be cleaned. Clean plastic bowl
(25, 42) and lens (3, 36, 47) with warm water only. Do
not submerge electrical service indicator (8) in water.
Clean indicator (8) with dry, clean cloth. Clean other
parts with warm water and soap.
2. Rinse and dry parts. Blow out internal passages in
body (6, 7) with clean, dry compressed air.
3. Inspect parts. Replace those found to be damaged.
Replace plastic bowl with a metal bowl if plastic bowl
shows signs of cracking or cloudiness.
ASSEMBLY
1. Lubricate o-rings, the portion of the manual drain
body (18, 28) that contacts the bowl, and the hole in
the manual drain body that accommodates the stem
of drain valve (19, 29) with o-ring grease.
2. Assemble filter as shown on the exploded view.
3. Arrows on indicator (3, 10) and body (6, 7) must point
in same direction. Push bowl, or bowl with guard, into
body and turn fully clockwise.
4. Torque Table
Torque in N-m (Inch-
Pounds)
2, 9 (Screw)
2,8 to 3,9 (25 to 35)
22, 32 (Nut)
2,3 to 2,8 (20 to 25)
34, 45 (Screw)
1,7 to 2,3 (15 to 20)
51, 53 (Element)
0,5 to 2,2 (5 to 20)
CAUTION
Water and oil vapors will pass through these units and
could condense into liquid form downstream as air
temperature drops. Install an air dryer and an oil vapor
removal filter if water and oil vapors could have a
detrimental effect on the application.
WARNING
These products are intended for use in industrial
compressed air systems only. Do not use these products
where pressures and temperatures can exceed those
listed under Technical Data.
Polycarbonate plastic bowls can be damaged and
possibly burst if exposed to such substances as certain
solvents, strong alkalies, compressor oils containing
ester-based additives or synthetic oils. Fumes of these
substances in contact with the polycarbonate bowl,
externally or internally, can also result in damage. Clean
with warm water only.
Use metal bowl in applications where a plastic bowl
might be exposed to substances that are incompatible
with polycarbonate.
Before using these products with fluids other than air,
for nonindustrial applications, or for life-support systems
consult Norgren.
a subsidiary of IMI plc
F74C, F74H
Installation & Maintenance
Instructions
IM-200.105.02
(9/98)
Supersedes 4/98
