Environmental Technology Verification


Baghouse Filtration Products

Sinoma Science & Technology Co., Ltd.
FT-902 Filtration Media
(Tested July-August 2011)
               Prepared by

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

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Environmental Technology Verification
                      Report


      Baghouse Filtration Products

       Sinoma Science & Technology Co., Ltd.
               FT-902 Filtration Media
              (Tested July-August 2011)


                       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
U.S. Environmental Protection Agency
                                 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

FT-902 Filtration Media

Sinoma Science & Technology Co., Ltd.
No. 99 Tongtian Road       PHONE:
Jiangjing Science Garden    FAX-
Nanjing, Jiangsu, China
http://www.sinomatech.com/html-en/index.html
juxiaohui@gmail.com
86-25-87186865
86-25-87186876
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  PM25
emissions (i.e., particles  2.5  um and smaller in aerodynamic diameter).  This verification statement
summarizes the test results for Sinoma  Science & Technology Co., Ltd.'s (SSTCL's) FT-902 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 through the test filter of PM25. 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 um (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—6-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 it 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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SSTCL provided the following information about their product. The FT-902 is a needle felt filter media
with a polytetrafluoroethylene (PTFE) 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. Three of the swatches were selected at random for
preparing three test specimens 150 mm (5.9 in.) in diameter.
   Sinoma Science &  Technology
   PC# FT-902
   Filter Media with ePTFE Membrane
                Figure 1. Photograph of SSTCL's FT-902 filtration media
VERIFICATION OF PERFORMANCE

Verification testing of the SSTCL FT-902 filtration media was performed during the period of July 29 -
August 4, 2011, 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: SSTCL's FT-902 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
1 8.4 ± 3.6 g/dscm (8.0 ± 1 .6 gr/dscf)
120±6m/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 SSTCL's FT-902 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.

           Table 2. Baghouse Filtration Product Three-Run Average Test Results
                              for SSTCL's FT-902 Filtration Media
Verification Parameter
Outlet particle concentration at standard conditions3
PM2 5, g/dscm
(gr/dscf)
Total mass, g/dscmb
(gr/dscf)
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
At Verification Test
Conditions
<0.0000167C
(<0.0000073)
<0. 0000167°
(<0. 0000073)
2.07 (0.81)
2.05 (0.81)
0.03 (0.01)
253
0.12(1.90)
85
a Standard conditions: 101.3 kPa (14.7 psia) and 20 °C (68 °F).
c  The measured value was determined to be below the detection limit of 0.0000167 grams per cubic
   meter. The detection limit is fora 6-hour test and based on VDI 3926.
Beginning of table description. Table 2 is titled Baghouse Filtration Product Three-Run Average Test Results for
SSTCL's FT-902 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.

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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 3 years thereafter.
signed by Cynthia Sonich-Mullin       11/29/2011     signed by Jason Hill            10/21/2011
Cynthia Sonich-Mullin                 Date           Jason Hill                      Date
Director                                             Director
National Risk Management Research Laboratory        Air Pollution Control Technology Center
Office of Research and Development                  RTI International
United States Environmental Protection Agency
  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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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


                                           Notice

This document was prepared by RTI International* (RTI) and its subcontractor ETS Incorporated (ETS)
with partial  funding from Cooperative Agreement No. CR 83416901-0 with the U.S. Environmental
Protection Agency (EPA). The document has been subjected to RTI/EPA's peer and administrative
reviews and has  been approved  for publication.  Mention of  corporation  names, trade names, or
commercial products does not constitute endorsement or recommendation for use of specific products.
 RTI International is a trade name of Research Triangle Institute.

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Environmental Technology Verification Report         Sinoma Science & Technology Co., Ltd. FT-902


                                          Foreword

The  Environmental Technology Verification (ETV) Program, established  by the U.S.  Environmental
Protection Agency (EPA), is designed to accelerate the development and commercialization of new or
improved technologies through third-party verification and reporting of performance. The  goal of the
ETV Program is to verify the performance of commercially ready environmental technologies through the
evaluation of objective and quality-assured data in order to provide potential purchasers and permitters an
independent, credible assessment of the technology that they are buying or permitting.

The  Air Pollution Control Technology Center (APCT Center)  is part of the  EPA's ETV Program and is
operated as a partnership between RTI International  (RTI) and EPA.  The APCT Center  verifies the
performance of commercially ready air pollution control technologies.  Verification tests use approved
protocols,  and verified  performance  is reported in verification statements signed by  EPA and RTI
officials. RTI contracts with ETS Incorporated (ETS) to perform verification tests  on baghouse filtration
products, including filter media.

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 it 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. The
APCT Center developed (and EPA approved) the Generic Verification Protocol for Baghouse Filtration
Products to provide guidance on these verification tests.

The  following report reviews the performance of Sinoma Science & Technology Co., Ltd.'s (SSTCL's)
FT-902 filtration media. ETV testing of this technology was conducted during July - August 2011 at ETS.
All  testing was performed in accordance with an approved  test/quality  assurance (QA) plan that
implements the requirements of the generic verification protocol at the test laboratory.

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


                   Availability of Verification Statement and Report

Copies of this verification report are available from the following:
    RTI International
    Discovery & Analytical Sciences
    P.O. Box 12194
    Research Triangle Park, NC 27709-2194
    U.S. Environmental Protection Agency
    Air Pollution Prevention and Control Division (E343-02)
    109 T. W. Alexander Drive
    Research Triangle Park, NC 27711
Web Site: http://www.epa.gov/etv/vt-apc.html (electronic copies)
                                             in

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902

                                     Table of Contents

                                                                                          Page
Notice	i
Foreword	ii
Availability of Verification Statement and Report	iii
List of Figures	v
List of Tables	v
List of Abbreviations and Acronyms	vi
Acknowledgments	viii
1.0   Introduction	1
2.0   Verification Test Description	2
      2.1   Description of the Test Rig and Methodology	2
      2.2   Selection of Filtration Sample for Testing	4
      2.3   Control Tests	4
      2.4   Analysis	5
3.0   Description of Filter Fabric	7
4.0   Verification of Performance	8
      4.1   Quality Assurance	8
      4.2   Results	8
      4.3   Limitations and Applications	9
5.0   References	10
                                               IV

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Environmental Technology Verification Report         Sinoma Science & Technology Co., Ltd. FT-902


List of Figures

                                                                                        Page

Figure 1. Diagram of filtration efficiency media analyzer test apparatus	3
Figure 2. Photograph of SSTCL's FT-902 filtration media	7
List of Tables

Table 1. Summary of Control Test Results	5
Table 2. Summary of Verification Results for SSTCL's FT-902 Filtration Media	9

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Environmental Technology Verification Report
Sinoma Science & Technology Co., Ltd. FT-902
                          List of Abbreviations and Acronyms




APCT Center      Air Pollution Control Technology Center




BFP              baghouse filtration product




cfm               cubic feet per minute




cm               centimeters




cm w.g.           centimeters of water gauge




dia.               diameter




AP               pressure drop




dscmh            dry standard cubic meters per hour




EPA              U.S. Environmental Protection Agency




ETS              ETS Incorporated




ETV              Environmental Technology Verification




FEMA            filtration efficiency media analyzer




fpm               feet per minute




g                 grams




g/dscm            grams per dry standard cubic meter




g/m3              grams per cubic meter




G/C               gas-to-cloth ratio (filtration velocity)




gr                grains




gr/dscf            grains per dry standard cubic foot




GVP              generic verification protocol




h                 hours




in.                inches




in. w.g.            inches of water gauge




kPa               kilopascals




m                meters
                                             VI

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Environmental Technology Verification Report
                                 Sinoma Science & Technology Co., Ltd. FT-902
m/h




m3/h




mbar




min.




mm




MPa




ms




Pa




PM




PM25




psi




psia




PTFE




QA




QC




RTI




s




scf




SSTCL




t




VDI




um




°C



OF




°R
meters per hour




cubic meters per hour




millibars




minutes




millimeters




megapascals




milliseconds




pascals




particulate matter




particulate matter 2.5 micrometers in aerodynamic diameter or smaller




pounds per square inch




pounds per square inch absolute




polytetrafluoroethylene




quality assurance




quality control




RTI International




seconds




standard cubic feet




Sinoma Science & Technology Co., Ltd.




time




Verein Deutscher Ingenieure




micrometers




degrees  Celsius




degrees  Fahrenheit




degrees  Rankine
                                              vn

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


                                    Acknowledgments

The authors acknowledge the support of all those who helped plan and conduct the verification activities.
In particular, we would like to thank Michael Kosusko, U.S. Environmental Protection Agency's (EPA's)
Project Officer, and Bob Wright, EPA's Quality Manager, who both work as part of EPA's National Risk
Management Research Laboratory in Research Triangle Park, NC. Finally, we would like to acknowledge
the assistance and participation of SSTCL personnel, who supported the test effort.

For more information on SSTCL's FT-902, contact the following:

Dr. Xiaohui Ju
Sinoma Science & Technology Co., Ltd.
Nanjing Fiberglass Research & Design Institute
No. 99 Tongtian Road
Jiangjing Science Garden
Nanjing, Jiangsu, China
211100
86-25-87186865
juxiaohui@gmail.com
For more information on verification testing of baghouse filtration products, contact the following:

Jason Hill
RTI International
P.O. Box 12194
Research Triangle Park, NC 27709-2194
(919)541-7443
APCTVC@rti.org
                                             Vlll

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


1.0    INTRODUCTION

This report reviews the pressure drop (AP) and filtration performance of Sinoma Science & Technology
Co.,  Ltd.'s (SSTCL's) FT-902 filtration media. Environmental Technology Verification (ETV) testing of
this technology/product was conducted during a series of tests in July - August 2011 by ETS Incorporated
(ETS), under contract with the Air Pollution Control Technology Center (APCT Center). The objective of
the APCT Center and the ETV  Program is  to verify, with high data quality, the performance of air
pollution control technologies. Control of fine-particle  emissions  from various industrial and electric
utility sources employing baghouse control technology is within the scope of the APCT Center. An APCT
Center program area was designed by RTI International (RTI) and a technical panel of experts to evaluate
the performance of particulate filters for fine-particle (i.e., PM2 5) emission control. Based on the activities
of this technical panel, the Generic Verification Protocol for  Baghouse Filtration Products  was
developed. This protocol was chosen as the best guide to verify the filtration performance of baghouse
filtration products  (BFPs).  The  specific test/quality assurance (QA) plan  for the  ETV test  of the
technology was developed and approved in May 2000, followed by an approved update in February 2006.
The goal of the test was to measure filtration performance of both PM2 5 and total particulate matter (PM),
as well as the AP characteristics of the SSTCL technology identified above.

Section 2 of this report documents the procedures used for the test and the conditions over which the test
was conducted. A description of SSTCL's FT-902 filtration media is presented in Section 3.  The results
of the test  are summarized and discussed in Section 4, and references are presented in Section 5.

This report contains summary information and data from the test and the verification statement. Complete
documentation of the test results is provided in a separate data package report and an audit of data quality
report. These reports include the  raw test data from product testing and supplemental testing as well as
QA and quality control (QC) activities and results. Complete documentation of QA/QC activities and
results, raw test data, and equipment calibrations results are retained in ETS's files for 7 years.

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


2.0    VERIFICATION TEST DESCRIPTION
The BFPs were tested in accordance with the APCT Center Generic Verification Protocol for Baghouse
Filtration Products1 and the Test/QA Plan for the Verification Testing of Baghouse Filtration Products2
These documents incorporate  all the requirements for quality management, QA, procedures for product
selection, auditing of the test laboratories, and reporting format. The Generic Verification Protocol (GVP)
describes the overall procedures used for verification testing and defines the data quality objectives. 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 1994.3 The values for inlet dust concentration, raw gas flow rate, and
filtration velocity used for current verification testing have been revised in consultation with the technical
panel since posting of the GVP.  These revisions are documented in Section 4.1. The test/QA plan details
how the test laboratory at ETS implemented and met the requirements of the GVP.

2.1    Description  of the Test Rig and Methodology

The tests were conducted in ETS's filtration efficiency media analyzer (FEMA) test apparatus (Figure  1).
The test apparatus is based on the VDI 3926 Type  1 vertical duct design. The test apparatus consists of a
brush-type dust feeder that disperses test dust into a vertical rectangular  duct (raw-gas channel). The dust
feed rate is  continuously  measured and recorded via an electronic scale located beneath the dust feed
mechanism. The scale has a continuous readout with a resolution of 10 g. A radioactive polonium-210
alpha source is used to neutralize the dust electrically before its entry into the raw-gas channel. An optical
photo sensor monitors the concentration of dust and ensures that the flow is stable for the entire duration
of the test. The optical photo  sensor does not measure  absolute concentration, and is, therefore, not the
primary concentration measurement for the test. A portion of the gas  flow is extracted from the raw-gas
channel through the test filter, which is mounted vertically at the entrance to a horizontal duct (clean-gas
channel). The clean-gas channel flow is separated in two gas  streams, a  sample stream and a bypass
stream. An aerodynamic "Y"  is used for this purpose.  The aerodynamic "Y" is designed for isokinetic
separation of the clean gas with  40% of the clean gas entering the sample-gas channel without change in
gas velocity. The  sample-gas  channel contains  an  Andersen impactor  for particle separation and
measurement. The bypass channel contains an absolute filter. The flow within the two segments  of the
"Y" is continuously monitored and maintained at selected rates by adjustable valves. Two vacuum pumps
maintain air flow through the  raw-gas and clean-gas channels. The flow rates, and thus the gas-to-cloth
ratio (G/C) through the test filter, are kept constant and measured using mass flow controllers. A pressure
transducer is used to  measure the average residual AP of the filter sample.  The pressure transducer
measures the differential pressure across the filter samples every 3 seconds; the residual AP measurements
are those taken  3 seconds after the cleaning pulse. The AP measurements are then averaged, as described
in Appendix C, Section 4.4.1 of the GVP.1  High-efficiency filters are installed upstream of the flow
controllers  and  pumps to prevent contamination or damage caused  by the dust.  The cleaning  system
consists of a compressed-air tank set at 0.5 MPa (75 psi), a quick-action diaphragm valve,  and a blow
tube [25.4 mm  (1.0  in.) dia.] with a nozzle  [3 mm (0.12 in.) dia.] facing the downstream side of the test
filter.

Mean outlet particle concentration is determined when a portion of the gas flow is extracted from the raw-
gas channel through the test filter, which is mounted vertically at the entrance to a horizontal duct (clean-
gas channel). The clean-gas flow is separated using an aerodynamic "Y" so that a representative sample
of the clean gas flows  through an Andersen impactor that determines the  outlet particle concentration.
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.

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Environmental Technology Verification Report
Sinoma Science & Technology Co., Ltd. FT-902
                                                   DUST FEED FROM EXTERNAL HOPPER

                                                   DUST CHARGE NEUTRALIZER


                                                   RECTANGULAR CHANNEL
                                                   111 x 292 mm (4-3/8 x 11-1/2")
                                                   PHOTOMETER

                                                   FILTER FIXTURE AND TEST FILTER

                                                   CYLINDRICAL EXTRACTION TUBE

                                                   CLEAN-GAS SAMPLE PORT

                                                   RAW-GAS SAMPLE PORT

                                                   CLEANING SYSTEM
                                                                             BACKUP
                                                                             FILTER
                                                                                  MASS FLOW
                                                                                  CONTROLLER
                                                    ABSOLUTE FILTER AND
                                                    ANDERSENIMPACTOR
                ADJUSTABLE
                  VALVES
                                                                          CALIBRATED
                                                                          ORIFICE
                                                               BLOW TUBE
                                                               DIRTY AIR
                                                               FILTER
                                                                       CLEAN AIR PUMP
                                                         MASS FLOW
                                                         CONTROLLER
                      DIRTY AIR
                       PUMP
                                DUST
                                CONTAINER
             Figure 1. Diagram of filtration efficiency media analyzer test apparatus.

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


The particle size was measured while a fine dust was injected into the air stream upstream of the filter
fabric sample. The particle size distributions in the air were determined both upstream and downstream of
the test filter fabric to provide accurate results for penetration through the test filter of PM2 5.

The following series of tests was performed on three separate, randomly selected filter fabric samples:

    Conditioning period
•   Recovery period

•   Performance test period.
To simulate long-term operation, the test filter was first subjected to a conditioning period, which consists
of 10,000 rapid-pulse cleaning cycles under continuous dust loading. During this period, the time between
cleaning  pulses was maintained at 3  seconds. No  filter performance  parameters are measured in this
period.

The conditioning period is immediately followed by a recovery period, which allowed the test filter fabric
to recover from  rapid pulsing. The  recovery  period  consists of 30 normal  filtration cycles under
continuous and constant dust loading.  During a normal filtration cycle, the dust cake  is allowed to form
on the test filter until a differential pressure of 1,000 Pa (4.0 in. w.g.)  is  reached. At this point, the test
filter is cleaned by a pulse of compressed air from the clean-gas side  of the fabric.  The next filtration
cycle begins immediately after the cleaning is complete.

Performance  testing occurred  for  a 6-hour period immediately following the recovery  period  (a
cumulative total of 10,030 filtration cycles after the test filter had been installed in the test apparatus).
During the performance test period, normal filtration cycles are maintained  and, as in the case of the
conditioning and recovery periods, the test filter is subjected to continuous  and  constant dust loading.

The filtration velocity (G/C)  and inlet dust concentrations were maintained at 120 ± 6 m/h (6.6 ± 0.3 fpm)
and 18.4  ± 3.6 g/dscm (8.0 ±1.6 gr/dscf), respectively, throughout all phases of the test.

2.2    Selection of Filtration Sample for Testing

Filter fabric samples of FT-902 filtration media were  supplied to ETS directly from the manufacturer
(SSTCL), with  a letter signed  by SSTCL, attesting that the filter media  were selected at random  in  an
unbiased manner from  commercial-grade media and were not treated in  any  manner different from the
media provided to customers. The manufacturer supplied the test laboratory with nine 46x91 cm (18x
36 in.) filter samples. The test  laboratory randomly  selected three samples and prepared them for testing
by cutting one test specimen of 150 mm (5.9 in.) diameter from each selected  sample  for insertion in the
test rig sample  holder. The  sample holder has an opening  140 mm (5.5 in.) in diameter, which is the
dimension used to calculate the face area of the tested specimen.

2.3    Control  Tests

Two types of control tests were performed during the verification test series. The first was a dust
characterization, which is performed monthly. The reference dust used during the verification tests was
Pural NF aluminum oxide dust. The Pural NF dust was oven dried for 2 hours and sealed in an airtight
container prior to its insertion into the FEMA apparatus. The criteria for the dust characterization test are
a maximum mass mean diameter of 1.5 ± 1.0 urn and a concentration between 40% and 90% of particles
less than  2.5 (im. These criteria must be met in order to continue the verification test series.
The second control test, the reference value test, is performed quarterly using the reference fabric and the
FEMA apparatus.  The reference value test determines the weight gain of  the reference fabric,  as well as

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902

the maximum AP (final residual pressure drop). The results of the test verified that the FEMA apparatus
was operating consistently within the required parameters. The average fabric maximum AP (average of
the repeated measurements of final residual pressure drop conducted during the quarter applicable to this
test) in a reference value test must be 0.60 cm w.g. ± 40%, and the fabric weight gain average must be
1.12 g ± 40%. Three reference value control test runs were conducted. The results of the control tests are
summarized in Table 1.
                            Table 1. Summary of Control Test Results
Controlled Parameter
Mass mean diameter, urn
% Less than 2.5 urn
Weight gain, g
Maximum pressure drop, cm w.g.
Requirement
1.5± 1.0
40%-90%
1.12 ±40%
0.60 ± 40%
Measured Value
2.30
53.97%
0.72
0.42
Criteria Met
Yes
Yes
Yes
Yes
Beginning of table description. Table 1 is titled Summary of Control Test Results. The table lists the results of
measurements meant to characterize the operation of the test apparatus. The mass mean diameter of the challenge
aerosol, the percent less than 2.5 micrometers in diameter, the weight gain of a reference fabric and the maximum
pressure drop of the reference fabric were measured. In columns, the table lists the QA/QC requirements, the values
measured during the control tests, and whether or not the criteria were met. For this test, all criteria were met. End of
table description.

2.4    Analysis
The equations used for verification analysis are described below.
Af     =      Exposed area of sample filter, m2
Cds    =      Dry standard outlet particulate concentration of total mass, g/dscm
C2.5ds  =      Dry standard outlet particulate concentration of PM2 5, g/dscm
dia.    =      Diameter of exposed area of sample filter, m
Fa     =      Dust feed concentration corrected for actual conditions, g/m3
Fs     =      Dust feed concentration corrected for standard conditions, g/dscm
G/C   =      Gas-to-cloth ratio, m/h
Mt    =      Total mass gain from Andersen impactor, g
M2.5   =      Total mass gain of particles equal to or less than 2.5  um  diameter from Andersen
               impactor, g. This value may need to be linearly interpolated from test data.
N     =      Number of filtration cycles in a given performance test period
Pavg    =      Average residual AP, cm w.g.
P;     =      Residual AP for rth filtration cycle, cm w.g.
Ps     =      Absolute gas pressure  as measured in the raw-gas channel, mbar
Qa     =      Actual gas flow rate, m3/h
Qds    =      Dry standard gas flow rate, dscmh
Q2.5ds  =      Dry standard gas flow rate for 2.5 um particles, dscmh
Qst    =      Standard gas flow rate for a specific averaging time, t, dscmh
t      =      Specified averaging time or sampling time, s
tc      =      Average filtration cycle time,  s
Ts     =      Raw-gas channel temperature, °F
wf     =      Weight  of dust in feed hopper following specified time, g. Because of vibrations causing
               short-term fluctuations to the feed hopper, this value is measured as a 1-min. average.

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Environmental Technology Verification Report
                           Sinoma Science & Technology Co., Ltd. FT-902
w;     =      Weight of dust in feed hopper at the beginning of the specified time, g. Due to vibrations
              causing short-term fluctuations to the feed hopper, this value is measured as  a  1-min.
              average.
Conversion factors and standard values used in the equations are listed below.

460    =   0 °F, in °R
1,013  =   Standard atmospheric pressure, mbar
528    =   Standard temperature,  °R

Area of Sample Fabric, Af
        Af =
Actual Gas Flow Rate, Qa

                  ~(Ts+ 460)* 1013
       Qa = Qd,

Gas-to-Cloth Ratio, G/C

       G_Qa
P *528
        C   A,
Standard Dust Feed Concentration, Fs, for a specified time, t
            (w. — wf]
        F = V  '    f '
         s~ (a,*0
Actual Raw Gas Dust Concentration, Fa

                  fc+460)*1013
           = F
                      Ps * 528
Dry Standard Clean Gas Particulate Concentration, Total Mass, Cds
                       Mt
                      L  %H2O
              Q  * f * M	?_
                      I     100  ,
Dry Standard Clean Gas Particulate Concentration, PM2.5j C2
                                                     5ds
                              %HO
                 )    * i * | \ —.

Filtration Cycle Time, tc

       '"if
Average Residual Pressure Drop, Pavg

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Environmental Technology Verification Report
Sinoma Science & Technology Co., Ltd. FT-902
3.0   DESCRIPTION OF FILTER FABRIC

The SSTCL FT-902 is a needle felt filter media with a polytetrafluoroethylene (PTFE) membrane.
Figure 2 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 test specimens 150 mm (5.9 in.) in
diameter.
   Sinoma Science  & Technology
   PC# FT-902
   Filter Media with ePTFE Membrane
                 Figure 2. Photograph of SSTCL's FT-902 filtration media.

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Environmental Technology Verification Report          Sinoma Science & Technology Co., Ltd. FT-902


4.0    VERIFICATION OF PERFORMANCE

4.1    Quality Assurance

The verification tests were conducted in accordance with an approved test/QA plan.2 The  EPA quality
manager conducted an independent assessment of the test laboratory in June 2005 and found that the test
laboratory was equipped and operated as specified in the test/QA plan.

The ETS QA officer and the APCT Center's QA  staff have reviewed the results  of this test and have
found that the results meet the overall data quality objectives as stated in the test/QA plan. It should be
noted that, because of the highly efficient nature of the filter medium being  tested, the impactor substrate
weighings for these results were below the reproducibility of the balance. The relative percent error in the
post-filter weighing measurements cannot be  computed because most of the values were near zero. As  a
result of this occurrence, the tests do not meet the  data quality objectives (DQOs)  stated in the test/QA
plan for mass gain associated with outlet concentrations. However, as stated in the test protocol, "for
highly efficient fabrics, the mass gains stated for  these quality objectives may not be achieved in the
specified test duration. For these tests it is acceptable for the indicated DQO  not to be met."

Data on calibration certificates for the flow meters, flow transducers, weights, low- and high-resolution
balances, thermometer, and humidity logger are maintained at ETS in a separate data package.

Deviations from the test plan include organizational personnel changes.

The ETS QA officer and the APCT Center's QA staff have also reviewed the results of the control tests,
which are summarized in Section 2.3, Table 1. The dust characterization control test met the appropriate
requirements of the test/QA plan and verification protocol. The reference fabric tests met maximum AP
and weight gain requirements established for reference fabric performance in the GVP, indicating the
measurement system is operating in control.

4.2    Results

Table 2 summarizes the mean outlet particle concentration measurements for the verification test periods.
Measurements were conducted during the 6-hour performance test period.  The performance test period
followed a 10,000-cycle conditioning period and a 30-cycle recovery period.

Table 2 summarizes the  three verification tests that were performed under standard verification test
conditions. The average residual AP across each filter sample at the nominal 120 m/h (6.6 fpm) filtration
velocity [for a flow rate of 5.8 m3/h (3.4 cfin)] is also shown in Table 2. This AP ranged from 1.90 to 2.26
cm w.g. (0.75 to 0.89 in.  w.g.) for the three filter samples tested. The residual AP  increase  ranged from
-0.25 to 0.22  cm  w.g. (-0.10 to 0.09 in. w.g.) for the samples  tested.  All three standard condition
verification runs were used  to  compute the averages given in  Table 2.  The  PM2s  outlet particle
concentration average for the three runs is < 0.0000167 g/dscm. The total PM concentration average for
the three runs is < 0.0000167 g/dscm.

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Environmental Technology Verification Report
Sinoma Science & Technology Co., Ltd. FT-902
           Table 2. Summary of Verification Results forSSTCL's FT-902 Filtration Media
Test Run Number
PM2.5 (g/dscm)b
Total PM (g/dscm)
Average residual A P (cm w.g.)
Initial residual A P (cm w.g.)
Residual A P increase (cm w.g.)
Mass gain of sample filter (g)
Average filtration cycle time (s)
Number of cleaning cycles
5V5-R1
<0.0000167C
<0.0000167C
2.26
2.21
0.12
0.11
255
84
5V5-R2
<0.0000167
<0.0000167
1.90
1.85
0.22
0.12
249
86
5V5-R3
<0.0000167
<0.0000167
2.05
2.10
-0.25
0.14
256
84
Average3
<0.0000167
<0.0000167
2.07
2.05
0.03
0.12
253
85
3 All three verification runs were used to compute averages.

b One or more of the impactor substrate weight changes for these results was near the reproducibility limit of the
balance.

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 Summary of Verification Results for SSTCL's FT-902 Filtration Media.
The table lists the verified test results for the three replicate test runs and their averages. The table lists the particle
concentrations downstream of the sample filters, the pressure drop characteristics, the mass gain of the sample filter,
the average filtration cycle time, and the number of cleaning cycles during the test. In separate columns, results for
these parameters are listed for each of the three test runs and their averages. End of table description.

4.3     Limitations and Applications

This verification report addresses two aspects of BFP performance: outlet particle concentration and AP.
Users may wish to consider other performance parameters, such as service life and cost, when selecting a
baghouse filtration fabric for their application.

In accordance with the GVP, the verification statement, which summarizes this test report, is applicable to
BFPs manufactured between the signature date of the verification statement and three years thereafter.

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Environmental Technology Verification Report         Sinoma Science & Technology Co., Ltd. FT-902
5.0    REFERENCES

1.      RTI International. 2001. Generic Verification Protocol for Baghouse Filtration Products, RTI
       International, Research Triangle Park, NC, February. Available at
       http://www.epa.gov/etv/pubs/05_vp_bfp.pdf.

2.      ETS Incorporated and RTI International. 2006. Test/QA Plan for the  Verification Testing of
       Baghouse Filtration Products (Revision 2), ETS Incorporated, Roanoke, VA, and RTI
       International, Research Triangle Park, NC, February. Available at
       http://www.epa.gov/etv/pubs/600etv06095.pdf.

3.      Verein Deutscher Ingenieure (VDI). 1994. VDI 3926, Part 2, Testing of Filter Media for
       Cleanable Filters under Operational Conditions, December 1994. Available from Beuth Verlag
       GmbH, 10772 Berlin, Germany.
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