gas (LPG). CNG, LNG and LPG have the same problems that plague diesel and gasoline — particulate contami- nation collects during handling, water condenses in tanks, and compressors leak oil into the fuel stream. The alter- native fuel filters/coalescers offer ultra-fine filtration at the pressures re- quired by compressed natural gas. FFC series filters are designed to protect critical engine components in CNG-, LNG- and LPG-powered vehi- cles. Contaminants can be introduced into a vehicle’s fuel tank when being fueled or may come from compres- sors or storage facilities. A Grade 6 coalescing filter is specifically de- signed to remove oil, water and solid contamination from compressed natu- ral gas. The patented coalescing filter removes 99.97% of all aerosols in the 0.3 to 0.6 micron range. These fuel filter/coalescer filters are produced by a patented process of ar- ranging micro-glass fibers into a tubular form. During operation, fuel is forced through the coalescing media from the inside of a cartridge through a tubular wall to the outside, where large drop- lets fall to the bottom of the housing.
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PLAIN FILTERS LTD. Plain Filters Ltd. has recently devel- oped two new lines of DPFs for 4.0 L engines with an output range of 134 hp or below and 8.0 L engines with an output range of 234.6 hp or below. The company is a member of the Xinxiang Aviation Industry Group and is based in Xinxiang, Henan Province, China. It currently supplies DPFs to vehicle manufacturers in China, includ- ing Jiangling Motors, Iveco and Qingling Motors, for use in their up to 3.0 L, 93.8 hp engines. They have also been installed as retrofits on light trucks across the country, Plain Filters said. The 4.0 L specification products tar- get mainly medium- to heavy-duty construction equipment and distribu- tion vehicles such as postal trucks, as well as medium buses undergoing retrofitting. The 8.0 L line has been
developed specifically to cater to the needs of heavy construction machin- ery and distribution vehicles, as well as to support retrofitting programs of large transport vehicles. Production of these two new lines is expected to start in 2010, upon com- pletion of prototype testing.
TECHNOLOGY OF CLEAN AIR
Also new are two systems for addi- tive dosing: a dosing unit for micro- dosing and a dosing system for addi- tives with an integrated pressure sen- sor to ensure longer service intervals, lower ash loading and lower con- sumption of the additive. PURI tech has also founded a new subsidiary in the United States, and CARB verification is in progress to enter California’s off-road market. In addition, Low Emission Zone and Non-Road Mobile Machinery certifi- cations are in progress to enter the U.K. market. PURI tech has already opened a branch in the U.K.
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RYPOS INC.
February 2010 DIESEL PROGRESS NORTH AMERICAN EDI TION 41
PURI tech’s new particulate filter reduces NOx and NO2 and has HC dosing for low- temperature applications.
PURI tech has introduced a new particulate filter system with HC dos- ing for low-temperature operations.Th e particulate filter system was test- ed for the reduction of NOx and NO2 on a chassis dynamometer at the University of Graz – Austria. The test vehicle was a Mercedes-Benz Euro 3 Citaro city bus.Th e test was done under the city drive cycle 9040 and shows signifi- cantly lower exhaust gas tempera- tures than other city cycles, such as the Braunschweig cycle. PURI tech reported that NOx was reduced by 21%, NO2 by 61%, HC by 83%, CO by 99.7% and PM by 95%.Th e average exhaust gas temperature was 446°F. The HC dosing unit was not activated during the test in order to have the most challenging conditions possible. When NO2 reached 90%, the HC dosing unit was activated. PURI tech said the system is more cost-effective for vehicle operations with lower exhaust gas temperatures and demanding NOx and NO2 re- ductions, such as city bus operations. PURI tech has also developed a new active filter system in the lower price segment for OEM applications to achieve Stage 3b and Tier 4 and for the retrofit of small engines, 29. 5 to 80.5 hp. Rypos’ Mobile Power Emissions Control System (MDPF) serves power generators ranging from 134 to 671 hp.Th e new Mobile Power Emissions Control System (MDPF) from Rypos targets users of mobile diesel-powered equipment and mobile power rental fleet operators. The MDPF system serves power generators ranging from 134 to 671 hp, utilizing the company’s proprietary active diesel particulate filter technology. It meets current U.S. EPA and CARB Level 3 Plus standards.De signed to provide mobile power users and fleet operators with flexibility, the active filter system is trailer mount- ed for easier transport and provides quick inter-connects to the diesel mobile power module, Rypos said. It can also be ordered as a self-contained skid mount for placement at a job site.SE E DIRECTLINK WWW.DIESELPROGRESS.COM continued on page 42
