| Вид документа | Бюлетень виробу |
|---|---|
| Виробник | JCI |
| Код документа | a-4000-oil-indicator-product-bulletin |
| Група обладнання | A-4000 Oil Indicator |
| Сторінок | 4 |
| Мова документа | англійська |
| Розмір файлу | 0.3 МБ |
Текст документа
Pneumatic Air Supply Manual 718
Filter Stations Section
Product Bulletin A-4000
Issue Date 0984
A-4000
Oil Indicator
The A-4000 Oil indicator is a Operation
calibrated measuring instrument
used to detect aerosol-mist When the needle valve of the oil
levels of oil entrainment that may indicator is open, less than
be present in compressed air 2 SCIM/PSIG (.08 mL/s/kPa) will
systems. Sensitivity of the flow through the calibrated
indicator is limited only by the plastic tube. Any oil present in
total number of hours it is the air will then carry a red oil
allowed to remain on the air soluble dye up the tube, coloring
supply system. The indictor is a white material in the tube. The
sensitive enough to measure a rate of color travel will be
concentration of oil entrainment proportional to the amount of oil
as low as .01 PPM (.012 mg/m3) present. The parts per million
in a compressed air system. It (PPM) value of oil entrained in
can be used in systems with line the air can be determined using
pressures between 10 and the conversion chart included
125 PSIG (70 and 875 kPa). with the instrument. After use,
the needle valve should be Fig. 1: A-4000 Oil Indicator
closed and left in the line and the Installed in Air Line
Application cartridge removed. At the time of
Oil entrainment in the control air the next test, a replacement
supply to the pressure reducing cartridge will need to be installed
valve may eventually have an on the needle valve fitting.
adverse effect on the control
system performance. Since
some oil entrainment is inherent
to lubricated compressors, all oil
lubricated compressor
installations must include factory
approved oil filters to be reliably
acceptable. The indicator can
be used in two ways. Either it
can be used to check for oil Specifications
carryover from the compressor
or it can be used to check out
any filtered air supply source
before connecting it to the
system and also every few
months after the system
becomes operative. Once the
needle valve of the oil indicator
has been opened, one
continuous uninterrupted
exposure is recommended for
greatest accuracy.
© 1984 Johnson Controls, Inc. 1
Part No. 64-272-0, Rev. A
Code No. LIT-718070
Installation Before installing a replacement 4. Judging from the rate of
cartridge, first check that the color travel established at
In order for the oil indicator to needle valve on the existing the time of the first
properly measure a given oil installation is closed all the way inspection, schedule the
entrainment, sufficient exposure by making sure that the needle final reading of the indicator
time is required. The length of valve handle (see Fig. 2) is fully (and needle valve shut-off)
exposure time is inversely rotated in a clockwise direction. at approximately 1 unit
proportional to the pressure at Install the replacement cartridge (marked "1.0" on the scale),
the point of installation. When (see Fig. 3) by tightening the and preferably not more
using the indicator to check for lower 1/8 in. nut in place. than 1-1/2 units (marked
oil carryover from the "1.5" on the scale).
compressor, it should be Note: Do not disturb the
installed at the discharge of the 5. Close the needle valve,
factory adjusted torque on the remove the oil indicator
tank. When using the indicator upper 3/16 in. retaining nut
to measure oil entrainment in the cartridge, and record the
that holds the plastic tube in time. Leave the needle
air supply system, it should be place. Also make sure that
installed between the oil filter valve in the air line for future
the indicator scale can be testing purposes.
and the pressure reducing valve conveniently viewed before
(PRV). At this point, dry high tightening the cartridge in 6. Record the units of color
pressure air will be present, place. travel (as read from the
resulting in the best accuracy indicator scale) and the total
and fastest indication. time in hours.
Readings and
Note: In humid air, moisture Measurements
may wash traces of dye up the
tube, creating a light pink area 1. Before taking a
above the dark red area. measurement, fill out the
When calculating oil record tag furnished with the
entrainment, measure only to oil indicator. Record the line
the top of the dark red pressure or the average
column. Locations involving pressure (if it varies at the
excessive moisture, point of installation).
temperature, or velocity
2. Fully rotate the needle valve
should be avoided. The
handle (see Fig. 2)
indicator valve should remain
counterclockwise to open it
closed except during the
and record the time that the
measuring period. For
needle valve was opened
pressures above 125 PSIG
on the record tag. Slide the
(875 kPa) or below 10 PSIG
record tag over the oil
(70 kPa), consult the factory.
indicator to avoid
misplacing it.
! WARNING: If the pressure
exceeds 125 PSIG or the 3. At the following times and
retaining nut is loosened, locations, visual inspections
the oil indicator tube could of the oil indicators should
blow out of the compression be made:
Fig. 2: Dimensions in./mm
fitting, creating a hazardous
condition. A. When checking for
compressor oil
carryover, inspection
The indicator must be mounted should be made after
within 45° of an upright position 4 hours at the
for best possible performance. compressor discharge.
Fittings (1/8 in N.P.T.) are
provided on both high and low B. When checking for oil
pressure sides of all A-4000 entrainment in the air
series filter and reducing station supply, inspection
assemblies. Any other mounting should be made after
location will require a 1/8 in. 40 hours between the
N.P.T. mounting tee as shown in oil filter and the PRV.
Fig. 1.
2 A-4000 Product Bulletin
Fig. 3: A-4000-121 Replacement
Cartridge
Oil Concentration
Determination (See Fig. 4)
1. If color travel is 1 unit at the
final reading time, find the
Total Hours on the right side
of the conversion chart and
the Pressure on the bottom
of the chart. The point
where Hours and Pressure
intersect is the parts per
million of oil concentration.
2. If the final reading occurs at
other than 1 unit of color
travel, divide the units
traveled by the total hours to
find the Rate of Color
Travel.
Example: The Rate of Travel
3. Find the Rate of Color on the high pressure side of a
Travel on the left side of the PRV (80 PSIG [560 kPa]) is
conversion chart and the found to be 0.5 units/hr. Divide
Pressure on the bottom of this rate by five (0.5 ÷ 5 = 0.1
the chart. The point where units/hr) to bring it into the range
Rate and Pressure intersect of the conversion chart. Locate
is the parts per million of oil this new rate on the chart,
concentration. showing a concentration of 1.4
For any Rate of Color Travel PPM. Multiply this concentration
beyond 0.24 units/hr., the by the previous factor
measured rate should be divided (1.4 × 5 = 7.0 PPM) to obtain the
by any factor which will bring it actual oil concentration in the air
into the range of the chart. This being tested.
number should then be used to
determine the oil concentration
(PPM). This concentration must
then be multiplied by the same
factor used previously to
determine the actual oil
concentration.
A-4000 Product Bulletin 3
Notes
Controls Group
507 E. Michigan Street
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53202
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