Norgren L73C User Manual
L73M, L73C
Installation & Maintenance
Instructions
FILL RESERVOIR (MICRO-FOG LUBRICATORS)
Shut off inlet air pressure and reduce pressure in reservoir
to zero. Remove fill plug (2), add oil, and reinstall fill plug.
Do not remove the fill plug when the reservoir is
pressurized, as oil will blow out the fill plug hole. Micro-
fog lubricators can be filled under pressure only if equipped
with the optional quick fill cap (4), which requires a quick
fill connector and oil pump. Fill to maximum fill line on
transparent reservoirs. Oil level must always be visible in
lens on metal reservoirs. DO NOT OVERFILL.
ADJUSTMENT
1. Turn on system pressure.
2. Adjust lubricator drip rate only when there is a constant
rate of air flow thru the lubricator. Monitor drip rate thru
sight feed dome (6).
3. Oil-Fog Lubricators - Determine the average rate of flow
thru the lubricator. Turn green rotator in sight feed dome
(6) to obtain one drop per minute for each 5 dm
3
/s (10
scfm). For example, if the average flow is 19 dm
3
/s (40
scfm), set the drip rate at 4 drops per minute. Turn
rotator counterclockwise to increase and clockwise to
decrease the drip rate. Total travel of rotator is 320°.
4. Micro-Fog Lubricators - Determine the average rate of
flow thru the lubricator. Turn red rotator in sight feed
dome (6) to obtain the recommended drops per minute.
See Drip Rate Chart. Turn rotator counterclockwise to
increase and clockwise to decrease the drip rate. Total
travel of rotator is 320°.
Drip Rate Chart for Micro-Fog Lubricators
Flow - dm
3
/s (scfm) Drops per Minute
2 (5) 3
5 (10) 4
10 (20) 7
15 (30) 9
20 (40) 12
25 (50) 15
5. Monitor the device being lubricated for a few days
following initial adjustment. Adjust the drip rate if the oil
delivery at the device appears either excessive or low.
DISASSEMBLY
1. Shut off inlet pressure. Reduce pressure in inlet and
outlet lines to zero. Loosen fill plug (2).
2. Remove reservoir - push into body and turn
counterclockwise.
3. Disassemble in general accordance with the item
numbers on exploded view. Do not remove the manual
drain unless replacement is necessary. Remove and
replace drain assembly only if drain malfunctions. Do not
remove siphon tube (49). Remove and replace items 50
thru 55 only if lubricator malfunctions. O-ring (55) is
only used on Micro-Fog lubricators.
CLEANING
1. Clean plastic reservoir with warm water only. Clean other
parts using warm water and soap.
2. Dry parts. Blow out internal passages in body with clean,
dry compressed air.
3. Inspect parts. Replace parts found to be damaged. If
plastic reservoir shows signs of cracking or cloudiness,
replace with a metal reservoir.
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 lubricator as shown on exploded view.
3. Torque Table N-m (Inch-Pounds)
2 (Fill Plug), 4 (Quick-fill cap) 1,1 to 1,6 (10 to 14)
6, 8 (Dome) 2,3 to 2,8 (20 to 25)
43 (Screw) 1,3 to 2,0 (12 to 18)
50 (Screw) 2,0 to 2,5 (18 to 22)
4. Push reservoir, or reservoir with guard, into body and
turn fully clockwise.
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 +80°C (0° to +175°F)
* Air supply must be dry enough to avoid ice formation at
temperatures below +2°C (+35°F).
Start point (minimum flow required for lubricator operation)
at 6,3 bar (90 psig) inlet pressure:
0,71 dm
3
/s (1.5 scfm)
Maximum recommended flow: 28 dm
3
/s (60 scfm). Air flows
above 28 dm
3
/s (60 scfm) create excessive air velocity,
turbulence, and pressure losses. In addition, the fog
produced by the lubricator will wet out on the pipe walls
and will not be carried by the compressed air to the point
of application.
Typical flow with 6,3 bar (90 psig) inlet pressure and 0,5
bar(7 psig) pressure drop:
Oil-Fog models: 75 dm
3
/s (158 scfm)
Micro-Fog models: 65 dm3/s (138 scfm)
Nominal bowl size: 0,1 litre (3.5 fluid ounce)
Manual drain connection: 1/8"
Materials:
Body: Aluminum
Bowl:
Transparent: Polycarbonate
Transparent with guard: Polycarbonate, steel guard
Metal: Aluminum
Metal bowl liquid level indicator lens: Transparent nylon
Sight-Feed dome: Transparent nylon
Elastomers: Neoprene and nitrile
REPLACEMENT ITEMS
Service kit (includes items circled on
exploded view) ...................................................4382-600
Liquid level lens kit (43, 45, 46, 47) ......................4380-020
Manual drain (18, 19, 20) ..........................................619-50
INSTALLATION
1. Shut-off air pressure. Install lubricator in air line -
● vertically (reservoir down),
● with air flow in direction of arrow on body,
● downstream of filters and regulators
● upstream of cycling valves,
● as close as possible to the device being lubricated,
● Oil-Fog Models - Not more than 5,2m (15 feet) from
the device being lubricated, and at the same height or
higher than the device.
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 reservoir, or reservoir with guard, into body and turn
fully clockwise before pressurizing.
RECOMMENDED LUBRICANTS
Use a good quality, light, misting type oil for compressed air
tools. See Norgren publication N/AL.8.900.935.
FILL RESERVOIR (OIL-FOG LUBRICATORS)
Remove fill plug (2), add oil, and reinstall fill plug. Fill plug
can be removed and oil added without shutting off air
pressure to the lubricator. Fill to maximum fill line on
transparent reservoirs. Oil level must always be visible in
lens on metal reservoirs. DO NOT OVERFILL.
NOTE: Oil fill plug (2) seals easily. Tighten finger-tight only.
Micro-Fog® and Oil-Fog
Tool Lubricators
L73★ - ★★★ - ★★★
Thread Form
A....PTF
B....ISO Rc taper
G....ISO G parallel
Bowl
D....Metal with plastic liquid level indicator
P....Transparent with guard
R....Metal with Pyrex liquid level indicator
T....Transparent
Options
N....None
P....Pyrex sight-feed dome
Q....Quick fill nipple
Drain
E....Closed bottom
Q....Manual, 1/4 turn
Air Flow Direction
P....Uni-directional
Type
C....Oil-Fog
M...Micro-Fog
Port
2....1/4"
3....3/8"
4....1/2"
IM-180.400.01
(5/02)
Supersedes 9/98
© Norgren 2002
a subsidiary of IMI plc
8
6
7
18
17
19
28
27
29
37
36
38
9
1
52
53
55
54
21
23A
23
20
22
31
33A
33
30
32
40
42A
42
39
41
2
3
4
5
49
51
50
26
25
24
34
35
47
48
46
44
45
43
L73M, L73C
Installation & Maintenance
Instructions
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 reservoirs 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 reservoir,
externally or internally, can also result in damage. Clean
with warm water only
Use metal reservoir in applications where a plastic
reservoir might be exposed to substances that are
incompatible with polycarbonate.
In lubrication applications some oil mist may escape
from the point of use to the surrounding atmosphere.
Users are referred to safety and health standards for
limiting oil mist contamination and utilization of protecting
equipment
Before using these products with fluids other than air,
for nonindustrial applications, or for life-support systems
consult Norgren.
IM-180.400.02
(5/02)
Supersedes 9/98
© Norgren 2002
a subsidiary of IMI plc
Loading...