Professional Design Large Flow Hydraulic Duplex Return Oil Line Filter 

1. Product introduction

SDRLF duplex large flow filter serie is with simple structure, the filter elements can be cleaned or replaced under continuous work to ensure normal operation of the equipment.  

2. Product characteristics

Filter basic construction

The characteristics of this filter are that the continuous operation is allowed even during element is changed for which is clogged by contaminants,

only need to open the balance valve and then turn the directional valve, the other filter begins to work, the clogged element should be changed in time.

This series filters are widely applied on hydraulic systems of heavy machinery, mining machinery, metallurgical machinery etc.  

2.1 Housing material

Carbon steel   

2.2 Seals 

Perbunan (= NBR)  

2.3 Filter element

Filter medium material

High strength carbon steel skeleton

2.4 Optional accessories

Combined visual/electrical clogging indicator   

2.5  Type of connection  

Chosen as per filter models  

2.6 Symbols 

3. Type selection and technical data

3.1 Order example

3.2 Technical Data

♦DFFILTRI was founded in 1995, since then we devoted ourselves to research, develop and produce many kinds of hydraulic filters, air filters, hydraulic system accessories, cleaning and filtration equipments, pump valve components. DFFILTRI is our brand, which enjoys high popularity and it has successfully achieved the position both in China and across the world.

♦DFFILTER filtration technology testing center covers a total area of 450 square meters, of which, clean room area of 200 square meters, and cleanliness is up to 100,000 levels. The centre undertakes filtration technology inspection and testing for in-house science research, production and industry service.   

♦On-line particle counter of BETAB-HIAC/POYCO type (8000A/8000S) provided by HIAC/POYCO company in USA, and its supporting machine"Multi-pass test" and "single-pass test" implements ISO16889 new standard and other international standards perfectly.

♦Testing center also has the developed equiment for filter performance testing, which can make the comprehensive examination for filter element/cartridge performance. These can insure that company’s filter with high capacity, long life, high reliable in full compliance with our customer's  requirement.

♦The testing centre can take 7 tests of hydraulic filter performance evaluation, they are as follows:

ISO 2941 Verification of collapse/burst resistance

ISO 2942 Verification of fabrication integrity and determination of the first bubble point

ISO 2943 Verification of material compatibility with fluids

ISO 3723 Method for end load testing

ISO 3724 Verification of flow fatigue characteristics

ISO 3968 Evaluation of pressure drop versus flow characteristics

ISO 16889 Multi-Pass method for evaluating filtration performance

Competitive Advantage:

• Manufacturer
• Competitive price can be offered
• Optimum paper folding
• Large dust holding capacity
• Good temperature resistance
• Good anti-humidity performance
• No distortion of pleats
• Environmental Friendly
• Special size available upon request
• OEM & ODM Customized is accepted
• On-time delivery
• Durable and reliable
• Ecnomical,practical,and easy to install
• Your inquiry related to our products or prices will be replied in 24 hours  

Our product mainly interchangeable with following brand  

PALL, HYDAC, MAHLE, PARKER, ARGO, FILTREC, STAUFF, VICKERS, EPPENSTEINER(EPE),TAISEI KOGYO, INTERNORMEN, MANN, DONALDSON, HY-PRO, MP-FILTRI, CAT, BENZ, VOLVO, CUMMINS, ALLISON,CLARK, EPE, SCHROEDER, LIEBHERR, DOOSAN, KOBELCO, JCB, FIEETGUARD, DEUTZ, SOFIMA, DETROIT, SACMI, KUBOTA,SAKURA, WIRTGEN, FAIFILTRI, SCHAEFF, POCLAIN, LUBERFINER, DYNAPAC, PALFINGER, SOFRANCE, VALMET, CECCATO, BOBCA, MCQUDY, COMMERCIAL, TAMROCK, SAUER-DANFOSS, PERKINS, JP-HBYB, LINDE