Record Display for the EPA National Library Catalog


Main Title Particulate measurement : efficiency of Pallflex T60A20 filter media /
Author Stulp, Kevin D.
CORP Author Environmental Protection Agency, Ann Arbor, MI. Standards Development and Support Branch.
Publisher U.S. Environmental Protection Agency, Office of Air, Noise and Radiaiton, Office of Mobile Source Air Pollution Control, Emission Control Technology Division, Standards Development and Support Branch,
Year Published 1979
Report Number SDSB 79-22
Stock Number PB80-115975
OCLC Number 717427975
Subjects Diesel motor exhaust gas--Measurement ; Filters and filtration
Additional Subjects Particles ; Filters ; Glass fibers ; Tetrafluoroethylene resins ; Performance evaluaton ; Exhaust emissions ; Diesel engines ; Concentration(Composition) ; Light duty vehicles ; Air pollution sampling ; Teflon ; Pallflex T60A20 resins
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
ELCD  EPA SDSB-79-22 NVFEL Library/Ann Arbor, MI 05/04/2011 DISPERSAL
NTIS  PB80-115975 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 5 p. : ill. ; 28 cm.
An experiment designed to measure the efficiencies of different lots of Pallflex T60A20 teflon-coated glass fiber filters has been completed. Results of these tests indicated that: (1) batch-to-batch variation of filters is generally less than 2 percent, and (2) this media will not satisfy the 98 percent filter efficiency requirement on all vehicles. The test procedure specified in the light-duty diesel particulate NPRM requires: (1) a filter efficiency of 98 percent, or greater efficiency and (2) that fluorocarbon-coated glass fiber filters must be used for testing. Some manufacturers have expressed concern that the 98 percent filter media efficiency requirement will be difficult to meet, and that there is a significant batch-to-batch variability with this media. Hence, a brief test program was conducted to evaluate the significance of these concerns. Two different production vehicles were used to evaluate batch-to-batch variation of the above filters, and also to investigate difficulties in meeting the 98 percent filter efficiency requirement.
"SDSB 79-22." "July 1979." Cover title. Technical report.