BOSCH REXROTH
R928005801
Filter Elements

BRFS Filter Elements

$526.32

BOSCH REXROTH

MATERIAL:  R928005801

SUMMARY:  BRFS Filter Elements

Quantity in stock: 8

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The filter element is the central component of industrial filters. The actual filtration process takes part in the filter element. The main filter variables, such as retention capacity, dirt holding capacity and pressure loss are determined by the filter elements and the filter media used in them. Rexroth filter elements are used for the filtration of hydraulic fluids in the hydraulic system as well as for the filtration of lubricants, industrial fluids and gases.

Filter elements consist of a combination of star-like pleated filter media (3) which are laid around a perforated support tube (2). In longitudinal direction, the filter element is sealed using a 2-component adhesive and support tube and filter element mat are connected with both end disks (1). Sealing between the filter element and the filter housing is effected by means of one or two seals. There is generally flow from the outside to the inside.

All 1st filter elements of the Rexroth preferred program are made of zinc-free components thus preventing the formation of zinc-soap, in particular if water-containing fluids (HFA/HFC) and synthetic oils are used.

The use of zinc-free filter elements prevents early "element blocking", thus considerably increasing the life cycle of an element.

Therefore, Rexroth filter elements can be used universally for typical hydraulic fluids and lubricants.

technical illustration-R928005801-BRFS Filter Elements

Glass fiber material, H...XL

Oil cleanliness class
ISO 4406

to be achieved with filter

Hydraulic system

βx(c) = 200

Material

possible arrangement

10/6/4 ‒ 14/8/6

1 μm

Glass fiber material, H...XL

Return flow or pressure filter

Special application

13/10/8 ‒ 17/13/10

3 μm

Servo valves

15/12/10 ‒ 19/14/11

6 μm

High-response valves

17/14/10 ‒ 21/16/13

10 μm

Proportional valves

19/16/12 ‒ 22/17/14

20 μm

Pumps and valves in general

Filter medium

Oil cleanliness class
ISO 4406

to be achieved with filter

Hydraulic system

βx(c) = 200

Material

Version

possible arrangement

G10

20/18/13 ‒ 21/20/15

10 μm

Stainless steel wire mesh, G...

Special Dutch weave

Return flow, pressure or suction filter

For existing systems (hydraulics) and as protective filter (G10, G25)For fluids such as:LubricantsPetrochemical productsWaterCoolants/thermal oils

G25

Cannot be used for wire mesh > 10 µm

25 μm

Woven roving

G40

40 μm

G60 … G800

60 μm … 800 μm

Plain cloth

Filter medium

Oil cleanliness class
ISO 4406

to be achieved with filter

Hydraulic system

Filtration ratio β values

1)

Retention rate with 10 μm

1)

Material

possible arrangement

P10

20/19/14 ‒ 22/20/15

β10(c) > 2,0

50 %

Paper P...

Return flow or pressure filter

For existing systems

P25

21/20/15 ‒ 22/21/16

β10(c) > 1,25

25 %

1)​

according to ISO 16889

technical illustration-R928005801-BRFS Filter Elements

Filter medium

nominal filter rating

VS25

25 μm

VS40

40 μm

VS60

60 μm

Filter medium

Oil cleanliness class
ISO 4406

to be achieved with filter

Hydraulic system

βx(c) = 75

Material

possible arrangement

M5

16/13/10 ‒ 20/15/11

5 μm

Metal fibre fleece M…

Return flow or pressure filter

Filter material for special applications

M10

18/14/10 ‒ 21/17/13

10 μm

Filter medium

Oil cleanliness class
ISO 4406

to be achieved with filter

Hydraulic system

βx(c) = 200

Particle size βx(c) = 200

1)

Particle size βx(c) = 1000

1)

Material

possible arrangement

AS3

13/10/8 ‒ 17/13/10

3 μm

4,5 μm(c)

5,0 μm(c)

Aquasorb AS…

Return flow, bypass or suction filter

Servo valves

AS6

15/12/10 ‒ 19/14/11

6 μm

5,5 μm(c)

7,5 μm(c)

High-response valves

AS10

17/14/10 ‒ 21/16/13

10 μm

7,5 μm(c)

9,5 μm(c)

Proportional valves

AS20

19/16/12 ‒ 22/17/14

20 μm

20 μm(c)

22 μm(c)

Pumps and valves in general

1)

according to ISO 16889

Functional principle

Rexroth Aquasorb filter elements are pleated just like Rexroth industrial filter elements, however they contain a layer of fleece material on a water-binding fabric in the form of a fine granulate. The corresponding non-woven glass fiber media is combined behind this fleece material, depending on the filter rating.

Effectiveness

The effectiveness of the Rexroth Aquasorb elements has been proven by internal testing and by a scientific examination at an independent institute. The water content (free water) can be reduced to the saturation point of the oil. The effectiveness and water absorption depend on the load on filter area, the viscosity of the oil and the oil temperature.

The values of water absorption and the change at higher viscosities are specified below.

Design and area of application

Rexroth Aquasorb filter elements must be dimensioned so that an initial pressure drop of 0.2 bar is not exceeded. They should be preferably used as a bypass filter in the low pressure range < 5 bar. The replacement of the filter element must be carried out at a pressure differential of at least 2.2 bar.

Rexroth Aquasorb can be used only in HLP and HEES.

Aquasorb AS…

Type

Rated flow in l/min

calculative water absorption in ml

with 15 cSt

with 30 cSt

with 46 cSt

with 120 cSt

1.0040

5

60

40

35

20

1.0063

8

100

70

55

35

1.0100

14

160

110

90

60

1.0130

19

225

155

130

85

1.0150

30

360

250

210

135

1.0160

20

265

185

155

100

1.0250

32

435

305

255

165

1.0400

40

785

550

455

300

1.0630

66

1290

900

750

490

1.1000

97

1435

1005

830

545

1.2000

189

2785

1950

1615

1055

1.2500

197

3650

2555

2115

1385

2.0040

3

35

25

20

15

2.0063

5

55

40

30

20

2.0100

8

90

65

50

35

2.0130

9

110

75

65

40

2.0150

12

145

105

85

55

2.0160

17

200

140

115

75

2.0250

28

325

225

190

125

2.0400

45

525

370

305

200

2.0630

46

715

500

415

270

2.1000

73

835

585

485

315

2.0058

105

1545

1080

895

585

2.0059

121

1790

1250

1035

680

01

02

03

04

05

06

07

08

1.

0

Design

01

Filter element

1. 1)

Size

02

according to DIN 24550

0040

0063

0100

0160

0250

0400

0630

1000

according to BRFS standard

0045

0055

0120

0130

0150

0200

0270

2000

2500

Filter rating in μm

03

Nominal

Stainless steel wire mesh, cleanable

G10

G25

G40

G60

G100

G200

G500

G800

Paper, not cleanable

P10

P25

Fleece material, not cleanable

VS25

VS40

VS60

Absolute
(ISO 16889)

Non-woven glass fiber media, not cleanable

H1XL

H3XL

H6XL

H20XL

Glass fiber material generation 5, non-reusable, not cleanable

PWR10

Metal fibre fleece, not cleanable

M5

M10

Water-absorbing, not cleanable

AS3 2)

AS6 2)

AS10 2)

AS20 2)

Pressure differential

04

max. admissible pressure differential of the filter element

30 bar

A

160 bar

C

Element design

05

Adhesive

Standard adhesive

0

Special adhesive

H 3)

Material

Standard material

0

Stainless steel 1.4571

V 4)

Bypass valve

06

Without

0

Seal

07

NBR

M

FKM

V

1)

For the admissible temperature ranges refer to the “Technical data”

2)

Only configurable with pressure differential A = 30 bar

3)

Improved temperature and media resistance, only in connection with FKM seal

4)

Only in connection with special adhesive and FKM seal

Further filter ratings and seal materials are available upon request.

general

Type

1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1. 1.

Size

0040 0063 0100 0160 0250 0400 0630 1000 0045 0055 0120 0130 0150 0200 0270 2000 2500

Weight 1)

m

0.16 kg 0.24 kg 0.38 kg 0.74 kg 1.07 kg 1.48 kg 2.42 kg 3.44 kg 0.59 kg 0.67 kg 4.8 kg 9.14 kg

Filter rating / mesh size

1 µm

Filter area

4.8 m²

Ambient temperature range

-10 … +65 °C

Operating temperature range

-10 … +100 °C

Storage temperature range 2)

NBR

-40 ... +65 °C

Storage temperature range 2)

FKM

-20 ... +65 °C

Material

Cover of the filter element

Polyamide or tin-coated steel or tin-coated aluminum

Base of the filter element

Polyamide or tin-coated steel or tin-coated aluminum

Support tube of the filter element

Tin-coated steel

Seals

NBR / FKM
1) refers to non-woven glass fiber media
2) max. relative air humidity 65 %

hydraulic

Size

0040 0063 0100 0160 0250 0400 0630 1000 0045 0055 0120 0130 0150 0200 0270 2000 2500

Filtration direction

From the outside to the inside

Maximum pressure differential

330 bar

Minimum conductivity of the medium

300 pS/m

Hydraulic fluid temperature range

-10 … +100 °C

Important information on hydraulic fluids!

For more information and data on the use of other hydraulic fluids, please refer to data sheet 90220 or contact us! Flame-resistant – containing water: Due to possible chemical reactions with materials or surface coatings of machine and system components, the service life with these hydraulic fluids may be less than expected. Filter materials made of filter paper P must not be used, filter elements with glass fiber material have to be used instead. Bio-degradable: If filter materials made of filter paper are used, the filter life may be shorter than expected due to material incompatibility and swelling.

For applications outside these parameters, please consult us!

Hydraulic fluid

Classification

Suitable sealing materials

Suitable adhesive

Standards

Mineral oil

HLP

NBR

Standard

DIN 51424

Bio-degradable

Insoluble in water

HETG

NBR

VDMA 24568

HEES

FKM

Soluble in water

HEPG

FKM

VDMA 24568

Flame-resistant

Water-free

HFDU, HFDR

FKM

VDMA 24317

Containing water

HFAS

NBR

DIN 24320

HFAE

NBR

HFC

NBR

VDMA 24317

Skydrol

EPDM

Special “H”

Attainable filtration ratio βx(c) (β value)

Typical β values of up to 2.2 barΔp pressure increase at the filter element 1)

Filter medium

Particle size “x” for different β values, measurement according to ISO 16889

βx(c) ≤ 75

βx(c) ≤ 200

βx(c) ≤ 1000

H1XL

< 4,0 μm(c)

< 4,0 μm(c)

< 4,0 μm(c)

H3XL

4,0 μm(c)

< 4,5 μm(c)

5,0 μm(c)

H6XL

4,8 μm(c)

5,5 μm(c)

7,5 μm(c)

H10XL

6,5 μm(c)

7,5 μm(c)

9,5 μm(c)

H20XL

18,5 μm(c)

20,0 μm(c)

22,0 μm(c)

1)

Filtration ratio βx(c) for other filter media upon request

Filtration ratio ßx(c) dependent on particle size μm(c)

technical illustration-R928005801-BRFS Filter Elements

Dirt holding capacity

Compared to conventional filter media with single layer technology, the H...XL filter material features a high dirt holding capacity because it is made of two separate filter layers connected in series.

Superior dirt holding capacity of H...XL filter elements

technical illustration-R928005801-BRFS Filter Elements

When has the filter element to be replaced or cleaned?

As soon as the dynamic pressure or the pressure differential set at the maintenance indicator is reached, the red pushbutton of the mechanical/visual maintenance indicator pops out. If an electronic switching element is provided, an electric signal will moreover sound. In this case, the filter element must be replaced or cleaned.

If the filter does not have a maintenance indicator, we recommend exchanging or cleaning filter elements after a maximum of six months.

 

Filter element exchange

For single filters: Switch off the system and discharge the filter on the pressure side. For installed duplex switch filters: Refer to the relevant maintenance instructions according to the filter type.

Detailed instructions with regard to the filter element exchange can be found on the data sheet of the relevant filter series.

 

Warning:

Filters are containers under pressure. Before opening the filter housing, check whether the system pressure in the filter has been decreased to ambient pressure. Only then may the filter housing be opened for maintenance.

 

Notice:

Due to the high viscosity, the pre-set signal value of the visual maintenance indicator may be exceeded during cold start. After the operating temperature has been reached, the mechanical/visual indicator can be acknowledged manually. The electrical signal will go out after the operating temperature has been reached. If the maintenance indicator signal is ignored, the disproportionately increasing pressure differential may damage the filter element causing it to collapse. Warranty becomes void if the delivered item is changed by the ordering party or third parties or improperly mounted, installed, maintained, repaired, used or exposed to environmental condition that do not comply with the installation conditions.

G…

Cleaning or replacement

Before cleaning a G... element, the filter element has to be dismantled first and then checked whether it makes sense to clean the element. For example, if the cloth contains many fibrous substances and consists of a material finer than G40, effective and complete cleaning is not possible in many cases. Filter mesh which has visible defects due to frequent cleaning must be replaced. In general, the following applies: The finer the cloth, the thinner the wire. Therefore, especially fine mesh must be cleaned gently to protect the material. Cracks in the folds of the wire mesh and the metal fiber fleece are to be avoided. Otherwise, the filter capacity will be insufficient.

Cleaning frequency

Experience has shown that filter elements made of G10, G25 and G40 can be cleaned up to ten times.

Filter mesh > 60 μm can usually be cleaned more than ten times. Reusability, however, very much depends on the type of contamination as well as on pressurisation (final Δp before dismantling the filter element). For maximum reusability, we therefore recommend exchanging in particular the fine mesh at a final Δp of 2.2 bar at the latest. Due to the given reasons, the aforementioned values must be regarded as reference values for which we do not assume any liability.

Manual and simple cleaning method for filter elements made of wire mesh

Procedure

Wire mesh G10, G25, G40

Wire mesh G60 and larger

Chemical pre-cleaning

Let the filter element drain for approx. 1 hour after disassembly. Bathe in solvent afterwards.

Mechanical pre-cleaning

Remove rough dirt with a brush or scrubber. Do not use hard or pointed objects which could damage the filter medium.

Mechanical/chemical main cleaning

Put pre-cleaned element in an ultrasonic bath with special solvent. Clean the element in the ultrasonic bath until any visible contamination is removed.

Evaporate with hot washing solution (water with corrosion protection agent)

Test

Visually check the material for damage. Replace the filter element if you identify obvious damage.

Preservation

After drying, you must spray the cleaned element with preservative agents and store it sealed against dust in a plastic foil.

Automated cleaning method for filter elements made of wire mesh

Procedure

Wire mesh G10 ... G800

Chemical pre-cleaning

Let the filter element drain for approx. 1 hour after disassembly. Bathe in solvent afterwards.

Mechanical/chemical main cleaning

By means of special cleaning systems for filter elements. Most of these systems are provided with a fully automated and combined cleaning mechanism including ultrasound as well as mechanical and chemical cleaning processes. This allows for best possible cleaning results with gentle cleaning processes.

Filter variables

Filter rating and attainable oil cleanliness

The main goal when using industrial filters is not only the direct protection of machine components but to attain the required oil cleanliness.

Oil cleanliness is defined on the basis of oil cleanliness classes which classify how the amount of particles of the existing contamination is distributed in the operating liquid.

Filtration performance

Filtration ratio ßx(c) (ß value)

The retention capacity of hydraulic filters with regard to the contamination in a hydraulic system is characterized by the filtration ratio βx(c). This variable is therefore the most important performance characteristic of a hydraulic filter. It is measured in the multipass test, and is the average value of the specified initial and final pressure differential according to ISO 16889 using ISOMTD test dust.

The filtration ratio βx(c) is defined as the ratio of the particle count of the respective particle size on both sides of the filter.

Dirt holding capacity

It is also measured using the multipass test and determines the amount of test dust ISOMTD which is fed to the filter medium until a certain pressure differential increase has been reached.

Pressure loss (also pressure differential or delta p)

The pressure loss of the filter element is the relevant characteristic value for the determination of the filter size. These are recommended values of the filter manufacturer or specifications by the filter user. This characteristic value depends on many factors. Mainly: the rating of the filter medium, its geometry and arrangement in the filter element, the filter area, the operating viscosity of the fluid and the flow.

The term “delta p” is often also expressed with the symbol: “Δp”.

When dimensioning the complete filter with filter element, an initial pressure loss is determined which must not be exceeded by the new filter element state on the basis of the aforementioned conditions. The size design of a Rexroth filter element and new complete filter by means of initial Δp or pressure loss may be comfortably completed using our online design software “BOSCH REXROTH FILTERSELECT”.

The following diagram shows the typical press loss behavior of filter elements with different material fineness at different flows for a viscosity of 30 mm2/s.

technical illustration-R928005801-BRFS Filter Elements

The diagram shows the typical pressure loss behaviour of filter elements with different filter media at different flow rates.

Admissible operating temperature range depends on the combination of materials.

Material

Ordering code

Operating temperature range in °C

Seal

NBR

M

-40…+100

FKM

V

-20…+210

Element design

Adhesive

Standard

0

-40…+100

Special adhesive

H

-55…+170

Element design

Material

Standard

0

-40…+100

Stainless steel

V

-55…+170

Filter element

Material

Aquasorb

AS…

0…+160

Stainless steel wire mesh

G…

-55…+500

Non-woven glass fiber media, not cleanable

H…XL

…+160

Metal fibre fleece

M…

-55…+250

Filter paper

P…

…+130

Fleece material

VS…

…+80

Rexroth filter elements are tested and quality-monitored according to different ISO test standards:

 

Filtration performance test (multipass test): ISO 16889:2008-06

Δp (pressure loss) characteristic curves: ISO 3968:2001-12

Compatibility with hydraulic fluid: ISO 2943:1998-11

Collapse pressure test: ISO 2941:2009-04

 

The development, manufacture and assembly of Rexroth industrial filters and Rexroth filter elements is carried out within the framework of a certified quality management system in accordance with ISO 9001:2000.

Environmental safety and recycling

The used filter element should be disposed of in accordance with the respective country-specific legal regulations of environmental protection.

After completion of the filter life, the components of the filter, in accordance with the respective country-specific legal regulations of environmental protection, are recycled.