Manual

Aluminum Cyclone
25 mm - Catalog No. 225-01-01
37 mm - Catalog No. 225-01-02
The SKC Aluminum Cyclone
The SKC Aluminum Cyclone is a lightweight respirable dust sampler that is used with a
fi lter loaded into a three-piece fi lter casse e. The fi lter material, pore size, and the support
pad must be selected as specifi ed by the sampling method used. The cyclone separates the
dust particles according to size. The respirable particles collect on a fi lter for analysis while
larger particles fall into the grit pot and are discarded.
Flow rate: 2.5 L/min to conform to the ISO/CEN particle size selection criteria and
OSHA proposed rule for silica (4.0-μm 50% cut-point)*
2.8 L/min for alternate applications (3.5-μm 50% cut-point)
†
* As previously published, a fl ow rate of 2.6 L/min will give a 4 μm cut-point, however, 2.5 L/min
will give a be er match over the entire curve.
† Determined using experimental data obtained at fl ows from 2.0 to 4.0 L/min
Note: The ACGIH/ISO/CEN curve requires using the fl ow rate that minimizes the bias of the
cyclone separation from the convention curve.
Operation
Assembly
1. Disassemble a three-piece casse e and set
aside inlet section (usually marked “inlet”).
Remove plug from casse e outlet.
2. Select a fi lter and support pad as specifi ed
in the sampling method. Insert casse e ring
(middle) section into casse e outlet (see Figure 1).
3. Insert cyclone into casse e ring and press
fi rmly. Leave grit pot in place during calibration
and sampling.
4. Insert cyclone/casse e assembly through
large opening of fi lter casse e holder (see Figure
3). Ensure assembly is seated fi rmly in holder
by inserting the cyclone‘s side pin (small round
nodule on rim of cyclone) into the notch in the
fi lter casse e holder.
5. Secure assembly in holder by stretching the
spring-loaded hold-down plate over the casse e.
Insert adapter (located in end of rubber tubing)
into casse e outlet.
Calibration
1. Prepare a cyclone/fi lter casse e assembly (see Assembly).
Calibrate the cyclone with grit pot in place.
2. Moisten O-ring inside large end of calibration chamber (Cat. No. 225-01-
03, see Figure 2) and push chamber over cyclone stem until it fi ts snugly.
3. Connect the Tygon
®
tubing a ached to the fi lter casse e holder to the inlet
of a sampling pump. Using fl exible tubing, connect the calibration chamber to
a calibrator.
4. Following instructions in the pump and calibrator manuals, calibrate to
required fl ow rate (see reverse side).
5. Disconnect calibrator and replace fi lter used to set fl ow with a fresh
weighed fi lter (unused) for sample collection.
Sampling
1. Ensure fl ow rate has been
calibrated (see Calibration).
Warning: Leave grit pot in place
during calibration and sampling.
2. Connect the Tygon tubing a ached
to the fi lter casse e holder to the inlet of
a sampling pump.
3. Clip cyclone/fi lter casse e assembly
onto a worker‘s collar or pocket near the
breathing zone.
4. Start pump and record pertinent
details.
5. At the end of the sampling period,
stop pump and record fi nish time.
Remove cyclone/fi lter casse e assembly from casse e holder. Separate cyclone from
casse e. Reassemble inlet section of casse e, ensuring the inlet and outlet are sealed with
plugs. Send casse e and all data to a laboratory for analysis.
Note: Particles collected in the grit pot do not represent any part of the respirable dust sample and
should be discarded.
6. Prior to further sampling, clean all parts of the cyclone, including the interior of the grit
pot, with mild soapy water. The cyclone may be wiped with a clean dust-free tissue, air
dried, blown dry, or wiped with isopropyl alcohol.
Accessories Catalog No.
Three-piece Filter Cassette Blanks 25 mm
37 mm
225-3-25LF
225-3LF
Filter Cassette Holder 25 or 37 mm 225-1
Calibration Chamber 25 or 37 mm 225-01-03
SKC Limited Warranty and Return Policy
SKC products are subject to the SKC Limited Warranty and Return Policy, which provides
SKC’s sole liability and the buyer’s exclusive remedy. To view the complete SKC Limited
Warranty and Return Policy, go to h p://www.skcinc.com/warranty.asp.
Form 3803 Rev 1402
Figure 1
Exploded view
of the cyclone/fi lter
cassette assembly
Figure 3
Cyclone with fi lter cassette in holder
Tygon
Tubing
Rubber
Tubing
Cyclone/Filter
Cassette Assembly
Filter
Cassette
Holder
Grit Pot
Collar Clip
Adapter
Air Flow
Figure 2
Calibration
Chamber
For more information: See SKC Technical Note, Publication 1519, at www.skcinc.com.
Operating Instructions
863 Valley View Road, Eighty Four, PA 15330 USA
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