GS Series Respirable Dust Cyclones

GS-3 Cyclone	Meets ACGIH/ISO/CEN respirable criteria 4.0-µm 50% cut-point at a 2.75 L/min flow rate* 3.5-µm 50% cut-point at a 3.7 L/min flow rate† for alternate applications Tangential inlet design decreases particle losses due to impaction Multiple-inlet design overcomes problems reported with the Dorr-Oliver Cyclone Eliminates ambient wind speed and orientation effects Eliminates adverse electrostatic effects Conductive plastic is safe for underground mine use
Sample Time: Varies Sample Rate: 2.75 L/min for 4.0-µm 50% cut-point* 3.7 L/min for 3.5-µm 50% cut-point† Sample Pump: Universal or AirChek Sample Media: 25 or 37-mm filters in 3-pc. cassettes Tubing: 1/4-inch ID * Calibrated at U. K. Health and Safety Laboratory. See the collection efficiency curve below. † Determined using experimental data obtained at flows from 2.0 to 4.0 L/min
GS-3 Multiple-inlet Cyclone Operating Instructions (PDF) GS Cyclones Spec. Sheet (PDF)

The Multiple-inlet GS-3 Cyclone
The GS-3 Cyclone is a 10-mm lightweight conductive plastic unit used with a standard three-piece cassette with filter for the collection of respirable dust particles. The GS-3 Cyclone’s removable cassette adapter fits securely into the middle ring of the filter cassette during sampling. Designed to meet the ACGIH/ISO/CEN respirable convention, the GS-3 Cyclone has a 50% cut-point of 4 µm (bias within ISO/NIOSH requirements) at 2.75 L/min* or 3.5 µm at 3.7 L/min^† for alternate applications.

	Conductive plastic construction Eliminates static collection problems with charged particles Safe for underground mine use   Tangential inlets lessen sampling errors that can occur when particles impact on the wall of the cyclone opposite the inlet.   Multiple inlets eliminate sensitivity to wind velocity and user orientation to the contaminant source.
Exploded View of GS-3 Cyclone with Cassette and Filter

The GS-1 Single-inlet Cyclone

GS-1 Cyclone	Conductive plastic construction Overcomes electrostatic effects experienced with the non-conductive Dorr-Oliver Cyclone Conductive material is safe for underground mine use Designed for use with the SKC DPM Cassette Screens out large particles to prevent filter overload Meets ACGIH/ISO/CEN respirable convention 4.0-µm 50% cut-point at 2.0 L/min* 3.5-µm 50% cut-point at 3.0 L/min† to meet U.S. regulatory requirements
Sample Time: Varies Sample Rate: 2.0 L/min for 4.0-µm cut-point* 3.0 L/min for 3.5-µm cut-point† 1.7 or 2.0 L/min for < 1.0-µm cut-point (DPM) Sample Pump: Universal XR or AirChek Series Sample Media: 37-mm 3-piece cassettes, 25-mm cassettes with adapter accessory, or SKC DPM Cassette * See reference list. † Determined using experimental data obtained at flows from 2.0 to 4.0 L/min
For more information, contact SKC Technical Support. GS-1 Single-inlet Cyclone Operating Instructions (PDF) GS Cyclones Spec. Sheet (PDF)

The GS-1 Cyclone is designed to meet the ACGIH/ISO/CEN respirable convention with a 50% cut-point of 4.0 µm at 2.0 L/min. The GS-1 Cyclone can also provide a 3.5-µm 50% cut-point when operated at 3.0 L/min for alternate applications. (Click to enlarge)

Using the GS-1 Cyclone with the SKC DPM Cassette
The SKC DPM Cassette is designed for sampling in atmospheres where it is necessary to separate diesel particulate matter (DPM) from other respirable dust (such as coal dust). The precision-jeweled impactor and impaction substrate, loaded into a single-use cassette, screens out respirable particles > 1.0 µm. Particles less than 1.0 µm are collected on heat-treated low-carbon quartz filters. The GS-1 Cyclone is used with the DPM Cassette to prevent larger particles (> 4 µm) from clogging the impactor as indicated in NIOSH Method 5040.

Multi-purpose Calibration Jar

The SKC Multi-purpose Calibration Jar provides convenient calibration when using a GS Cyclone, PUF tube, or OVS tube. Instead of packing four or five different calibration adapters for the field, pack only one Multi-purpose Calibration Jar. The rugged 32-ounce polypropylene jar contains a quick screw cap and barbed fitting for easy use. Multi-purpose Calibration Jar Cat. No.....................225-111

	The SKC lightweight Filter Cassette/Cyclone Holder (225-1) enables a GS-3 Cyclone with three-piece cassette (inlet section removed) and filter to be attached to a worker’s collar, close to the breathing zone, for true respirable dust sampling. The SKC Filter Cassette/Cyclone Holder is required when sampling with the GS-1 Cyclone with DPM Cassette. Figure at right shows GS-3 Cyclone sampling train with SKC filter cassette holder and AirChek 2000 sampler.
	The SKC Multi-purpose Calibration Jar (225-111) provides easy calibration when using a GS Cyclone.

Ordering Information          

GS-3 Multiple-inlet Cyclone Operating Instructions (PDF)

GS-1 Single-inlet Cyclone Operating Instructions (PDF)

GS Cyclones Spec. Sheet (PDF)

References
Kar, K. and Gautam, M., "Orientation Bias of the Isolated 10 mm Nylon Cyclone at Low Stream Velocity," AIHA Journal, Vol. 56 (1995), pp. 1090-1098

Gautam, M. and Sreenath, A., "Performance of a Respirable Multi-inlet Cyclone," Journal of Aerosol Science (U.K.), Vol. 28, No. 7 (1997), pp. 1265-1281

Trakumas, S., et. al., Performance Assessment of Personal Respirable Cyclone Samplers, AIHce Presentation 191, 2003

Contact SKC Technical Support for reprints.