New method for in-place testing of tandem HEPA filter installations

Journal Article · Thu Nov 01 00:00:00 EST 1979 · Am. Ind. Hyg. Assoc. J.; (United States)

DOI:https://doi.org/10.1080/15298667991430587· OSTI ID:5595119

Schuster, B G; Osetek, D J

A new in-place high-efficiency particulate air (HEPA) filter testing procedure has been developed, based on the use of an intracavity laser particle spectrometer for ultrasensitive detection of challenge particulate concentrations downstream of tandem HEPA filter installations. The feasibility of these measurements had initially been demonstrated on a small-scale laboratory system where overall protection factors of 10/sup 0/ were routinely measured. The primary scaling problem for systems up to 200,000 CFM was in producing sufficient challenge aerosol. This was accomplished by the design and construction of a high-volume thermal dioctyl phthalate generator. The results of acceptance testing of 13 tandem HEPA filter systems, performed with both the spectrometer technique and conventional light-scattering photometry, are displayed and problem areas discussed.

• Research Organization: Los Alamos Scientific Lab., NM
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5595119
• Journal Information: Am. Ind. Hyg. Assoc. J.; (United States), Vol. 40:11
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR CLEANING
EFFICIENCY
AIR FILTERS
FEASIBILITY STUDIES
COMPARATIVE EVALUATIONS
DESIGN
EXPERIMENTAL DATA
ISOLATED VALUES
LASERS
PARTICLES
PHOTOMETERS
QUANTITY RATIO
SPECTROMETERS
TESTING
CLEANING
DATA
DATA FORMS
EQUIPMENT
FILTERS
INFORMATION
MEASURING INSTRUMENTS
NUMERICAL DATA
POLLUTION CONTROL EQUIPMENT
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)