DAF - Purifilter- Brochure

When the exhaust passes through the micro-porous filter walls the soot particles in the exhaust areseparated and collected. At the same time the catalytic coating oxidizes the gaseous pollutants ofhydrocarbon (HC) and carbon monoxide (CO) to harmless carbon dioxide and water. The catalyticcoating also lowers the ignition temperature of the soot to approx. 320° C and the collected soot isautomatically burnt off during operation. At operating temperature less than 320° C the filter can beequipped with an electrical heater to regularly burn off the collected soot.The filtration is so efficient that any debris passing through the engine combustion chamber will alsobe collected (i.e. lube-oil ash, wear metals, intake air debris etc.). This debris should be removed toprevent excessive build-up. The cleaning intervals will depend on the conditions of the engine andoperation conditions.Purifilter™ is a self regenerating particulatefilter system based on Silicon Carbide(SiC), which offers superior thermaldurability and extended service life.The advanced base and precious metalcatalyst system not only lowers thebalance point of the soot but alsoprovides an extremely high reductionof CO and HC.FUNCTIONPURIFILTER™for diesel enginesPurifilter™ from Engine Control Systems (ECS) is an integrated diesel particulate filterand silencer, which efficiently removes particulate (PM) and gaseous pollutants,carbon monoxide, CO, and hydrocarbons, HC. The filtered particles (soot) areautomatically burnt off (self regeneration) at exhaust temperatures above 320 ° C.The system consists of:- A Purifilter™ which is mounted in the exhaust system in place of the original silencer.- An indicator lamp, which is mounted in the driver's cab to warn of high backpressure.Options- A manometer which continuously monitors the backpressure.- A precatalyst lowering the ignition temperature to 280-300° C. - Purifilter™ Plus. Electrical heaters inbuilt in the inlet section for regular regeneration of the filteron the vehicle. Electrical cables and control box are supplied.- A Combiclean™ station for regular maintenance and cleaning of the filter.DESCRIPTIONThe Purifilter™ is intended for permanent installation on vehicles and machines in heavy operationrunning regularly with exhaust temperatures above 320° C. At lower temperatures the separatedparticles will be stored in the filter and increase backpressure. Idle periods should be kept to a minimum.Exhaust temperature is dependent on a number of variables such as duty cycle, soot composition, makeof engine etc. If a vehicles' duty cycle is in question, data logging will be performed to ensure thePurifilter™ will regenerate during the vehicles' current and normal operation.To log data, a thermocouple is fitted within the exhaust stream, at the position where the Purifilter™would be installed.This thermocouple is then connected to a small data storage device and the vehicle isreturned to normal duty. Typical data logging is 3-5 working days. ECS can supply the data logger whichshould be returned after use. The data will be analysed by ECS, and the suitability of the duty cycle willbe reported.If exhaust temperatures are too low for passive regeneration the Purifilter kan be equipped with heatingelements in the inlet section, Purifilter™ Plus, and regeneration can take place at times suitable forthe application.Under certain conditions the catalytic coating can increase the NO2 value slightly. This is mainly aproblem in confined spaces such as mines and tunnels with limited ventilation. For these applicationswe recommend either the ECS Cattrap or the Unikat Combifilter.ECS recommends the use of Ultra-Low-Sulphur Diesel (max 50 ppm). Fuel containing higher levels ofsulphur will reduce efficiency and shorten the maintenance intervals.APPLICATIONManometer(option) PurifilterPurifilter Plus(option)Backpressurealarm The choice of inlet and outlet sections depends on the installation of the vehicle. All inlet sectionsincorporate mounting plates for vertical installation. The inlet and outlet sections can be supplied withbrackets for horizontal installation on request.When ordering, please inform us whether you prefer a vertical or horizontal installation and if the inletsection should be equipped with electrical heaters (Purifilter Plus), see options.Inlet section Outlet sectionInlet section with bottom inlet (axial) Typ T2 Outlet section with top outlet (axial)Inlet section with side inlet (radial) Typ T7 Outlet section with side outlet (radial)DESIGNThe Purifilter™ housing is manufactured of stainless steel and consists of an inlet section, a filtersection, and an outlet section. The sections are assembled with quick-release clamps that allow easydismantling for inspection and service. The choice of inlet and outlet sections depends on the installation.The filter part is sized according to the exhaust volume from the engine. The inlet and outlet sections are ofthe same design as is used for ECS' wellknown Unikat COMBIFILTER, see specification below.INLET AND OUTLET SECTIONS FOR PURIFILTERDimensionsTo obtain the proper filter size, the engine make, maximum allowed backpressure and drivingconditions must be known. The chart below shows the recommended air intake flow for each filter size.If you do not have the actual OEM intake air flow, use the general equation below to determine theapproximate value for four-stroke engines.Engine intake air flow (m3/h) = Engine displacement (liters) x max RPM of engine x VE x 60 2000VE = 0,85 for normally aspirated engines (NA), 1,7 for turbocharged (TA), 2,0 for turbocharged and aftercooledPlease contact Engine Control Systems or your local distributor for further sizing information.PRODUCT SIZINGIntake Max. cylinderair flowm3/hvolumeNA literTAModel WeightkgAmmC ø mm1252503506502,54,5 26,5112,55SC02HSC04H1822SC06HSC13H2429225 702752757010010001300160022007101416SC20HSC28H3946SC34HSC43H7075350380100100406406130140ACwith filterwithout fiReduction % CO HC11004100PM dB910085100CO HC PM dB020406080100Reduction % with filter without filterThe Purifilter™ effectively removes particulate(PM) and gaseous pollutants CO and HC fromdiesel exhaust and is also a silencer.Typical reduction*:- Carbon monoxide (CO) 99 %- Hydrocarbons (HC) 96 %- Particulate (PM) 91 %- Silencing > 15 dB* Tested according to ISO 8178.Purifilter™ has been tested by Svensk Bilprovning, Motor-testcenter, Sweden, Leyland Technical Centre and MillbrookProving Ground, UK, South West Research Institue, USA,and Environment Canada. We are happy to furnish moredetails of these tests if required.Engine Control Systems' products are warranted for workmanship and defects of material for a period of 12 months ormaximum 2000 operation hours. The obligation of this warranty is limited to the replacement of the product. Theprovisions of this warranty do not apply to the product incorrectly chosen, or installed or operated, nor to any product thathas been subjected to damage or negligence. Engine Control Systems shall not be liable for any incidental orconsequential damages or for breach of any express or implied warranty.WARRANTYFor further service or for information on our otherproducts, please contact ECS or our distributors.Distributor:REDUCTIONEngine Control Systems Europe ABBox 9015, SE-200 39 Malmö, SwedenTel. +46 (0)40 6701550 Fax +46 (0)40 210335 E-mail ecseu@enginecontrolsystems.com www.ecseurope.seIssue 05, Aug 2011Engine Control Systems Limited165 Pony Drive, Newmarket, Ontario, Canada L3Y 7VITel. +1 905 8535800 Fax +1 905 8535801 E-mail ecs@enginecontrolsystems.com www.enginecontrolsystems.com