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Introduction

CRAF series automatic backflushing filter is a new generation self-cleaning filtration system independently designed by Xing Wei Hui Da company，filter vessel are designed and manufactured according to the GB / ASME Steel Pressure Vessel Standard.
CRAF series automatic backflushing filter is integrated with a number of wedge slotted tube filter elements,it has the advantages of compact structure,large filtration area,small space,low pressure drop,less back flushing frequency as well as continuous automatic on-line filtration and cleaning,super high flowrate up to 7000m3/h in single filter,Its the advanced solution for the self-cleaning filtrationof water and low viscous liquids. CRAF series automatic backflushing filters are widely used in iron and steel,metallurgy,electric power,papermaking, chemical,petroleum,pharmaceutical,food,mining,urban water supply and other fields.

Working Principle

CRAF series automatic backflushing filters main components include filter housing, filter elements, gear-motor, photoelectric positioning sensor, cleaning arm, drain valve, differential pressure sensor and control system. Please click on the link to view the working principle of video

Technical Features And Adventags

■ Continuous automatic online filtration, no flow interruption when back flushing, reducing downtime and maintenance cost
■ Large filter area, low surface flow velocity, low pressure drop, accuracy fine filtration, less back flushing frequency
■ Metal Wedge Tubes high performance filter element, accurate and uniform slot, efficient back flushing, high strength structure, long service life over 10 years
■ Impulse back flushing one by one, high back flushing intensity, less time consuming, less back flushing water consumption
■ Water flows in the filter element from both ends, which increases the flux, allows the water flow freely to reduce the clogging and avoids clogging at one dead end of the element
■ Compact design, super high flowrate in single filter, saving installation space and construction costs prominently
■ High integration without many valves, fittings and seals, high reliability and low running cost
■ Vertical and Horizontal filter housings configurations and flexible Inlet and Outlet flange orientations are offered for most sizes, allowing custom arrangements to accommodate installation requirements.
■ High reliability in automatic control system , friendly Interface, easy to adjust the running mode to fit the service condition

Technical Specifications

■ Filter Fineness:5-3000μm	■ Flow Rate:4.5-7000m³/h
■ DES.PRES (MPa):10bar(STD) / 16bar / 7bar	■ DES.TEMP :90℃
■ Housing Material:SS304 / SS316L / CS	■ Filter Element Material:SS304 / SS316L
■ Driving Device:Gear Motor	■ Arm Material: SS316L
■ Viscosity (cp):1-40	■ Power Supply:AC380 & 50HZ
Cleaning Start Mode
■ Difference Pressure Control Differential pressure indicator detects the pressure drop at both sides of the filter element reaches the set MAX allowed, The control system starts the cleaning action
■ Time Control Set the time of the time module in the control system and perform the cleaning action periodically. When the differential pressure start and time start simultaneously, differential pressure start priority
■ Manual Operationl The manual switch on the control panel can immediately start the cleaning procedure, which is usually used when the equipment is installed and debugged, the system maintenance or other needs

Model Technical Parameters

Model	Dimensions mm										Filtration area cm²	Flow Rate m³/h
Model	L	L1	L2	L3	L4	H	H1	H2	H3	H4	Filtration area cm²	Flow Rate m³/h
CRAF2	218	165	218	60	246	1010	918	607	220	100	2140	4.5 ～28
CRAF4	223	171	223	102	246	1330	1015	801	276	115	3810	25 ～112
CRAF6	302	241	302	120	260	1427	1147	894	300	117	6190	90 ～254
CRAF8	362	298	362	160	299	1595	1310	1058	400	179	8250	200～450
CRAF10	365	298	365	152	298	2091	1865	1301	399	170	12500	400～600
CRAF12	424	349	424	160	260	2299	1953	1446	493	185	18750	550～860
CRAF16	549	406	549	203	280	2454	2102	1595	600	221	37500	810～1698
CRAF20	620	464	620	254	280	2497	2121	1615	598	200	55760	1500～2450
CRAF24	697	584	697	300	280	2721	2326	1825	674	214	89100	2000～3600
CRAF28	795	645	795	794		2901	2506	1937	700	223	106100	3000～5000
CRAF36	1035	756	1035	300		3758	3345	2647	1000	215	180700	4500～7500
Note: ■ The decisive factors of filter flow are filter element type, filter fineness, liquid viscosity etc. ■ Filtration flow is not the only factor in determining the selection, the amount of pollutants, operating pressure drop, etc. are important factors selection

APPLICATIONS

■ Applicable Industries:Chemical and petrochemical, pulp and paper,Electricity and energy, Iron and steel,Mining and metallurgy,Pharmaceutical and biology,Food and beverages, Automobile industry, Water treatment,machinery manufacturing,irrigation etc

■ Typical Applicable Liquids:Reservoir water, freshwater, Groundwater, seawater, pond water, cooling circulating water, freezing water, high and low spraying water, squirt water, heat exchanging water, sealing water, bearing cooling water, recycled process water, machining coolant, cleaning agents, cleaning water, etc..