EPA/600/R-12/732s
                         April 2013
Environmental Technology Verification

Baghouse Filtration Products
TTG Inc.
TG800 Filtration Media
(Tested August 2012)
              Prepared by

     RTI International            ETS Incorporated
 HRTI
 INTERNATIONAL
          Under a Cooperative Agreement with
          U.S. Environmental Protection Agency
               EPA
 ET/ ET/

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Environmental Technology Verification
                      Report

        Baghouse Filtration Products

                      TTG Inc.
                TG800 Filtration Media
                (Tested August 2012)


                       Prepared by
                      RTI International
                      ETS Incorporated
             EPA Cooperative Agreement CR 83416901-0
                     EPA Project Officer
                      Michael Kosusko
              Air Pollution Prevention and Control Division
            National Risk Management Research Laboratory
                Office of Research and Development
               U.S. Environmental Protection Agency
                Research Triangle Park, NC 27711

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          THE ENVIRONMENTAL TECHNOLOGY VERIFICATION
                                 PROGRAM
SEPA
U.S. Environmental Protection Agency
                              ET/
                              HRTI
                              INTERNATIONAL
                 ETV Joint Verification Statement
     TECHNOLOGY TYPE:

     APPLICATION:


     TECHNOLOGY NAME:

     COMPANY:

     ADDRESS:

     WEB SITE:
     E-MAIL:
BAGHOUSE FILTRATION PRODUCTS

CONTROL OF PM2 5 EMISSIONS BY BAGHOUSE
FILTRATION PRODUCTS

TG800 Filtration Media

TTG Inc.
7561 South Highway 13
Higginsville, MO 64037
http://ttgtech.net
ttrimble@ttgtech.net
PHONE:  660-584-2448
FAX:     660-584-3422
 The U.S. Environmental Protection Agency (EPA) created the Environmental Technology Verification
 (ETV) Program to facilitate the deployment of innovative or improved environmental technologies
 through performance verification and dissemination of information. The goal of the ETV Program is to
 further environmental protection by accelerating the acceptance and use of improved and cost-effective
 technologies. The ETV Program seeks to achieve this goal by providing high-quality, peer-reviewed data
 on technology performance to those involved in the design, distribution, financing, permitting, purchase,
 and use of environmental technologies.

 The ETV Program works in partnership with recognized standards and testing organizations; stakeholder
 groups, which consist of buyers, vendor organizations, permitters, and other interested parties; and with
 the full participation of individual technology developers. The program evaluates the performance of
 innovative technologies  by developing test  plans that are responsive to the needs of stakeholders,
 conducting field or laboratory tests (as appropriate), collecting and analyzing data, and preparing peer-
 reviewed reports. All evaluations are conducted in accordance with rigorous quality assurance (QA)
 protocols to  ensure that data of known and adequate quality are generated and that the results  are
 defensible.

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The Air Pollution Control Technology Center (APCT Center) is operated by RTI International* (RTI), in
cooperation with EPA's National Risk Management Research Laboratory (NRMRL). The APCT Center
evaluates the performance of baghouse  filtration  products  (BFPs) used primarily to control PM2s
emissions (i.e., particles  2.5  urn and smaller in aerodynamic diameter). This  verification statement
summarizes the test results for TTG Inc.'s TG800 filtration media.

VERIFICATION TEST DESCRIPTION

All tests were  performed in accordance with the APCT Center  Generic  Verification  Protocol for
Baghouse Filtration Products, available at http://www.epa.gov/etv/pubs/05_vp_bfp.pdf The protocol is
based on and describes modifications to the equipment and procedures described in Verein Deutscher
Ingenieure  (VDI)  3926,  Part 2,  Testing of Filter Media for Cleanable Filters under  Operational
Conditions, December 1994. The VDI document is  available  from Beuth Verlag GmbH, 10772  Berlin,
Germany. The protocol also  includes requirements for  quality management and QA, procedures for
product selection, auditing of the test laboratories, and the test reporting format.

Outlet particle  concentrations from a  test fabric  were measured with  an impactor equipped  with
appropriate substrates to filter and measure PM2 5 within the dust flow. Outlet particle concentrations were
determined by weighing the mass increase of dust collected in each impactor filter stage and dividing by
the gas volumetric flow through the impactor.

Particle size was measured while injecting  the test dust into the air upstream of the baghouse filter
sample. The test dust was dispersed into the flow using a  brush-type dust feeder. The  particle size
distributions in the air were determined both upstream  and downstream of the test filter fabric to provide
accurate results for penetration of PM2 5 through the test filter. All  tests were performed using a constant
18.4 ± 3.6 g/dscm (8.0 ±  1.6  gr/dscf) loading rate,  a  120 ± 6.0 m/h (6.6 ± 0.3  fpm) filtration velocity
[identical to gas-to-cloth ratio (G/C**)], and  aluminum  oxide test  dust with a measured mass mean
aerodynamic diameter maximum of 1.5 urn (average of three impactor runs). All BFPs are tested in their
initial (i.e., clean) condition.

Each of the three test runs consisted of the following segments:

•   Conditioning period—10,000 rapid-pulse cleaning cycles
•   Recovery period—30 normal-pulse cleaning cycles
•   Performance test period—six-hour filter fabric test period with impactor.

VERIFIED TECHNOLOGY DESCRIPTION

Baghouses are air pollution control devices used to control particulate emissions from stationary sources
and are among the technologies evaluated by the APCT Center. Baghouses and their accompanying filter
media have long been one of the  leading particulate control techniques for industrial sources.  Increasing
emphasis on higher removal efficiencies has  helped the  baghouse to be continually more competitive
when compared to the  other generic PM control devices to the point  where the baghouse is now the
control option of choice for most industrial  applications. The  development of new and improved filter
media has further enhanced baghouse capability to control fine PM over an expanded range of industrial
applications.
 RTI International is a trade name of Research Triangle Institute.
  Filtration velocity and gas-to-cloth ratio are used interchangeably and are defined as the gas flow rate divided by
the surface area of the cloth.

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TTG Inc. provided the following information about their filter media product. The TTG Inc. TG800
filtration media is a 16 ounces per square yard (oz/yd2) scrim-supported polyphenylene sulfide (PPS) felt
laminated with an ePTFE (expanded polytetrafluoroethylene) membrane. Figure 1 is a photograph of the
fabric.  Sample material was received as nine  46 x 91 cm  (18 x 36 in.) swatches marked  with the
manufacturer's model number, year and month  of manufacture, and cake  side (the upstream side of the
fabric, which is exposed to the particle-laden air on which the filter cake builds up). Three of the swatches
were selected at random for preparing three circular test specimens 150 mm (5.9 in.) in diameter.
                              TG800  PPS
                                  Membrane
                 Figure 1. Photograph of TTG Inc.'s TG800 filtration media

VERIFICATION OF PERFORMANCE

Verification testing of the TTG Inc.'s TG800 filtration media was performed during the period of August
9 - 16, 2012, for standard test conditions at the test facility of ETS Incorporated, 1401 Municipal Road
NW, Roanoke, VA 24012. Test conditions are listed in Table 1. The overall test results summarized in
Table 2 represent the averages of three individual tests.

The APCT Center quality manager has reviewed the test results and the quality control (QC) data and has
concluded that the data quality objectives given in the generic verification protocol and test/QA plan have
been attained.

This verification  statement  addresses  five aspects of filter fabric  performance: filter outlet  PM25
concentration, filter outlet total mass concentration, pressure drop, filtration cycle time, and mass gain on
the filter fabric. Users may wish to consider other performance parameters, such as temperature, service
life, and cost when selecting a filter fabric for their application.

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                Table 1. Test Conditions for Baghouse Filtration Products
                      Brand/Model: TTG Inc.'s TG800 Filtration Media
Test Parameter
Dust concentration
Filtration velocity (G/C)
Pressure loss before cleaning
Tank pressure
Valve opening time
Air temperature
Relative humidity
Total raw gas stream flow rate
Sample gas stream flow rate
Number of cleaning cycles
During conditioning period
During recovery period
Performance test duration
Value
18.4 ± 3.6 g/dscm (8.0 ± 1.6 gr/dscf)
120 ±6 m/h (6.6±0.3fpm)
1, 000 ±12 Pa (4 ±0.05 in. w.g.)
0.5 ± 0.03 MPa (75 ± 5 psi)
50 ± 5 ms
25 ± 2 °C (77 ± 4 °F)
50 ±10%
5.8 ± 0.3 m3/h (3.4 ± 0.2 cfm)
1.13 ± 0.06 m3/h (0.67 ± 0.03 cfm)
—
10,000 cycles
30 cycles
6h±1 s
Beginning of table  description.  Table  1  is titled Test Conditions for Baghouse Filtration  Products; the
Brand/Model is listed as TTG Inc.'s TG800 Filtration  Media. The table describes the test conditions that
are specified in the QA/QC requirements for the test;  all conditions were achieved for this test. The table
lists the test parameters in one column and their values in the next column. The test parameters include
such items as the dust concentration, filtration velocity, flow rates, air temperature and humidity, and the
number of cleaning cycles during the test. End of table description.

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           Table 2. Baghouse Filtration Product Three-Run Average Test Results
                            for TTG Inc.'s TG800 Filtration Media
                       Verification Parameter
                      At Verification Test
                          Conditions
 Outlet particle concentration at standard conditions3
    PM25, g/dscm
          (gr/dscf)
   Total mass, g/dscmb
          (gr/dscf)
                         <0.0000167C
                         (<0.0000073)
                         <0.0000167C
                         (<0.0000073)
Average residual pressure drop (A P), cm w.g. (in. w.g.)
Initial residual A P, cm w.g. (in. w.g.)
Residual A P increase, cm w.g. (in. w.g.)
Filtration cycle time, s
Mass gain of test sample filter, g (gr)
Number of cleaning cycles
2.76 (1 .09)
2.74 (1 .08)
0.06 (0.02)
218
0.10(1.54)
98
   Standard conditions: 101.3 kPa (14.7 psia) and 20 °C (68 °F). One or more of the impactor substrate
   weight changes for these results were near the reproducibility of the balance.
b  Total mass includes the mass of PM2.5 and larger particles that passed through the fabric.
c  The measured value was  determined  to be below the detection limit of 0.0000167 grams per cubic
   meter. The detection limit is for a six-hour test and based on VDI 3926.
Beginning of table description.  Table 2 is titled  Baghouse Filtration  Product Three-Run Average Test
Results for TTG Inc.'s TG800 Filtration Media. The table lists the verified test results for this product. The
table lists the verification parameters in one column  and their values at the verification  test conditions in
the next column. The verification parameters listed include the outlet particle concentration, the pressure
drop characteristics, the filtration cycle time,  the mass gain of the test  sample, and number of cycles
during the test. End of table description.

In accordance with the generic  verification protocol,  this verification statement is applicable to  filter
media manufactured between the signature date of the verification statement and three years thereafter.
signed by Cynthia Sonich-Mullin   3/7/2013
Cynthia Sonich-Mullin            Date
Director
National Risk Management Research Laboratory
Office of Research and Development
United States Environmental Protection Agency
sisned by Jason Hill               11/1/2012
Jason Hill                        Date
Director
Air Pollution Control Technology Center
RTI International
NOTICE: ETV verifications are based on an evaluation of technology performance under specific, predetermined
criteria and the appropriate quality assurance procedures. EPA and RTI make no express or implied warranties as to
the performance of the technology and do not certify that a technology will always operate as verified. The end user
is solely responsible for complying with any and all applicable federal, state, and local requirements.  Mention of
commercial product names does not imply endorsement.

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