Norgren F73G User Manual
F73G
Installation & Maintenance
Instructions
SERVICING
1. Open manual drain to expel accumulated liquids. Keep
liquids below baffle (49).
2. Clean or replace filter element when dirty, when optional
mechanical service indicator shows approximately all
red, or when optional electrical service indicator provides
an electrical output.
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, 6) unless replacement is
necessary. Remove and replace only if they malfunction.
CLEANING
1. Clean plastic bowl (25, 35) and lens (3, 45) with warm
water only. Do not submerge electrical service indicator
(6) in water. Clean indicator (6) with dry, clean cloth.
Clean other parts with warm water and soap.
2. Rinse and dry parts. Blow out internal passages in body
(13) with clean, dry compressed air. Blow air through
filter element (50) from inside to outside to remove
surface contaminants.
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, 37) that contacts the bowl, and the hole in the
manual drain body that accommodates the stem of drain
valve (19, 29, 38) with o-ring grease.
2. Assemble filter as shown on the exploded view.
3. Arrows on indicator (3, 8) and body (13) 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, 7 (Screw) 2,8 to 3,9 (25 to 35)
22, 32, 41 (Nut) 2,3 to 2,8 (20 to 25)
43 (Screw) 1,7 to 3,4 (15 to 30)
49 (Baffle), 51 (Louver) 1,1 to 2,2 (10 to 20)
CAUTION
Water vapor will pass through these units and could
condense into liquid form downstream as air temperature
drops. Install an air dryer if water condensation 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 esterbased 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.
TECHNICAL DATA
Fluid: Compressed air
Maximum pressure:
Transparent bowl: 10 bar (150 psig)
Metal bowl: 17 bar (250 psig)
Operating temperature*:
Transparent bowl: -34° to +50°C (-30° to +125°F)
Metal bowl: -34° to +80°C (-30° to +175°F)
* Air supply must be dry enough to avoid ice formation at
temperatures below +2°C (+35°F).
Particle removal: 5 µm, 25 µm, or 40 µm filter element
Air quality: Within ISO 8573-1, Class 3 and Class 5
(particulates)
Typical flow with a 40 µm element at 6,3 bar (90 psig) inlet
pressure and 0,5 bar (7 psig) pressure drop: 35 dm
3
/s
(75 scfm)
Nominal bowl size: 0,1 litre (3.5 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: 0,1 dm
3
/s
(0.2 scfm)
Manual operation: Depress pin inside drain outlet to
drain bowl
Materials:
Body: Aluminum
Bowl:
Transparent: Polycarbonate
Transparent with guard: Polycarbonate, steel guard
Metal: Aluminum
Metal bowl liquid level indicator lens: Transparent nylon
Element: Sintered polypropylene
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)
.4380-600
Liquid level lens kit (43, 45, 46, 47) ......................4380-020
Filter element, 5µm, red speckles (50).....................4438-01
Filter element, 25µm, blue speckles (50) .................4438-02
Filter element, 40µm, no speckles (50)....................4438-03
Manual drain (18, 19, 20) ..........................................619-50
Automatic drain (21, 22, 23) .................................4000-51R
Mechanical service Indicator (1)..............................5797-50
Electrical service Indicator (6) ...............................4020-51R
INSTALLATION
1. Shut-off air pressure. Install filter in air line -
● vertically (bowl down),
● with air flow in direction of arrow on body,
● upstream of regulators, lubricators, and cycling
valves,
● as close as possible to the air supply when used as a
main line filter,
● 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. Push bowl, or bowl with guard, into body and turn fully
clockwise before pressurizing.
4. Flexible tube with 5mm (3/16") minimum I.D. can be
connected to the automatic drain. Drain may fail to
operate if the tube I.D. is less than 5mm (3/16"). Avoid
restrictions in the tube.
IM-180.100
(2/00)
Supersedes 9/98
© Norgren 2000
General Purpose Filter
F73G - ★★★ - ★★★
Thread Form
A....PTF
B....ISO Rc taper
G....ISO G parallel
Bowl
D....Metal with liquid level indicator
P....Transparent with guard
T....Transparent
Element
1....5 µm
2....25 µm
3....40 µm
Drain
A....Automatic
Q....Manual, 1/4 turn
Service Indicator
D....With mechanical service indicator
E....With electrical service indicator *
N....Without indicator
Port
2....1/4"
3....3/8"
4....1/2"
* See Norgren publication IM-900.920 for specifications and electrical wire connections of the optional electric service indicator.
a subsidiary of IMI plc
13
51
50
49
18
21
17
27
36
23
20
19
22
28
31
33
30
29
32
37
40
42
39
38
41
1
6
1011
7
8
12
25
24
35
44
9
26
34
47
48
46
2
4
3
5
45
43
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