Labconco Protector 3930000 User Manual page 81

Appendix D:
Quick Chart for the Protector
Work Stations
Model Size
Sash Height from Work Surface (inches)
Total Open Area with Bypass (sq. ft.)
Exhaust Airflow Volume at 80fpm (CFM)
Alarm Airflow Volume at 60 fpm (CFM)
*excludes remote Protector Work Station, since it has no integral blower.
To determine the actual face velocity at the sash opening, airflow velocity
readings will need to be taken. This should be done across the sash
opening of the enclosure in accordance with the Industrial Ventilation
Manual. (See Appendix E) The "average face velocity" is achieved by
taking readings in two rows across the enclosure with the readings 6" from
the ends and evenly spaced every 12"; the first row is 3" down from the
upper sash foil and the second row is 3" up from the work surface. A total
of eight readings are taken for the 4' Protector Work Station and then
averaged.
Product Service 1-800-522-7658
*Motor Horsepower (HP)
*Capacitor (MFD, Volts)
Fluorescent Lights
4'
8.00
2.50
200
150
0.30
15MFD, 115V
4MFD, 230V
F25T8
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