High Quality SDRLF Series Hydraulic Duplex Filter/Oil Return Pressure Line Purifier
High quality SDRLF series Hydraulic Duplex Filter/Oil Return Pressure Line Purifier
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
| Model | Nomal Flow Rate (L/min) | Dia (mm) | Nominal Pressure (bar) | Pressure Loss (bar) | Filtration Rating ( μm ) |
Cracking Pressure of the Bypass Valve (bar) |
Type of Indicator | Model of Filter Element | Quantity | Weight (kg) | ||
| Inital | Max | |||||||||||
| SDRLF | 1300 | 100 | 16 bar | 1 bar | 3.5 bar |
Optional 3,5,10,20,30...
βx(c) optional 75,100,200,1000, in accordance with ISO 16889 |
Setting 4 bar |
P=CS-V with CS-V Indicator
Without Indicator =With Plug |
SFX-1300x* |
1x2 | 610 | |
| 2600 | 150 | SFX-2600x* |
2x2 | 820 | ||||||||
| 3900 | 200 | SFX-3900x* |
3x2 | 850 | ||||||||
| 6500 | 250 | SFX-6500x* |
5x2 | 915 | ||||||||
| 7800 | 250 | SFX-7800x* |
6x2 | 960 | ||||||||
| 9100 | 250 | SFX-9100x* |
7x2 | 990 | ||||||||
About Us
♦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.

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Qualification and Honor of DFFILTRI
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Our Strategic Partners
P.S These are just part of our clients, in no particular order.
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