Page 629 - DixonCatalog20092010

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Simple Lubricator Troubleshooting
Oil-Fog Lubricator
Malfunction Possible cause Remedy
No Drip Rate
Oil Foaming
Oil Emulsified
Drip Rate changes after setting
Oil adjustment knob fully
clockwise
Low oil level
Airflow through lubricator too
low
Blocked oil filter screen
Air leaks
Over aeration
Water in lubricator
Fade
Readjust knob.
Check oil level.
Use smaller size lubricator.
Remove bowl and sight feed
adjustment dome and clear
syphon tube.
Remove sight feed adjustment
dome and clean or replace
screen located in dome
assembly.
Check bowl, filler plug and
sight dome seals. Tighten if
necessary.
Check bowl seals for slight
leaks.
Fit filter immediately upstream.
Readjust drip rate.
Metal
bowl
sight
glass
Sight
dome
Bo
Flow
sens
Check
valve
Bowl
Syphon
tube
Oil
Drain
(optional)
Setting Lubricator Drip Rates
What is the correct drip rate setting?
The drip rate will depend on the application, the amount of lubrication required, the flow through the lubricator and the
lubricator type. In Micro-Fog lubricators only 10% of the droplets in the sight dome are carried downstream. The drip rate
in Micro-Fog lubricators therefore tends to be much higher. The following table can be used to estimate drip rate for required
flow. This is very much a rule of thumb. In practice it is necessary to fine tune the oil drip rate in each application.
Typical Drip Rate per Minute
Micro-Fog
Typical Drip Rate per
Oil-Fog
Approximate Flow
SCFM (dm3/s)
20
40
60
80
100
120
2
4
6
8
10
12
10 (5)
20 (10)
30 (15)
40 (20)
50 (25)
60 (30)
Can the drip rate be shut off?
In lubricators with needle valve type sight dome, yes.
Some Norgren sight domes use a felt pad which is soaked in oil at the point where the drops are formed. With this type of sight
dome the oil droplets cease once the felt pad dries out. With the new style dome (L72/73/74 and L07) complete shut
off is not possible. Minimum adjustment for the drip rate is around 1 drop per minute.