RFA hydraulic tank filter,return filter

P.S These are just part of our clients, in no particular order.  

This kind of filter can be used in hydraulic system for oil return fine filtration, and can keep the oil back to tank clean.

This filter can be installed on the cover of the tank and the filter bowl is immersed in the oil tank,

the direct return oil is adopted, it is more convenient to replace the filter element.     

Filter basic construction

This return filter consists of filter cover and filter bowl,equipped with bypass valve,diffuser,clogging indicator etc device.  

2.1 Housing material

High strength casting aluminum alloy; high strength aluminum tube  

2.2 Seals

Perbunan (= NBR)

2.3 Filter element

High strength carbon steel skeleton

Filter medium material

2.4 Optional accessories

CYB-ⅠClogging indicator≤DC24V

CY-ⅡClogging indicator≤220V

2.5 Type of connection (choose according to filter models)

Metric threaded connection; Flanged connection  

2.6 Symbols  

3.1 Order example 

3.2 Technical Data

Note: * represents filtration rating.  

4.1  Inlet threaded Conntction;   4.2  Inlet flanged Connection  

 • Table 1:RFA-25~160 threaded connection dimension  

•Table 2:RFA-250~800 flanged connection dimension 

Note: 1)The inlet flange plate, connecting screw and seals etc. accessories, which can be provided by us, the user only needs to prepare φQ tube for the welding.

            2) 2-m is the screw hole with M18×1.5 ,which can be used for installing the indicator in each side or as the small oil returning hole and equipped with plug.

♦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