Bosch Rexroth 25TE Tank mounted return line filter

Bosch Rexroth 25TE Tank mounted return line filter

The tank mounted return line filter with filter element according to Bosch Rexroth standard is located in the return line for direct attachment onto the tank of a hydraulic or lubrication system. Optionally, the filter can also be installed as an inline filter in a pipeline.

The filter basically consists of filter cover (1), filter housing (2), filter element (3), as well as a bypass valve (3c).

Optionally, the filter is equipped with maintenance indicator (4). With an electrical maintenance indicator the connection can be carried out via different mating connectors (5).

If the filter is used as an inline filter, a threaded ring (6) must be configured with the order data - additional data “M” and a maintenance indicator waivered. If necessary, the customer must provide an external differential pressure measurement.

 

During operation, the hydraulic fluid reaches the filter housing via the inlet; here, it flows through the filter element (3a) from the outside to the inside and is cleaned according to the filter rating. The dirt particles filtered out collect in the dirt retainer (3b) and in the filter element (3a). Via the outlet, the filtered hydraulic fluid enters the tank. When the element becomes fully contaminated, the required element change is signaled by the maintenance indicator (4 or 5). There are several maintenance indicators to choose from:

 

  • Mechanical visual maintenance indicator
  • Electrical maintenance indicator with three possible mating connectors (mating connectors are to be ordered separately)
  • Electrical maintenance indicator ATEX with pre-assembled mating connector

 

Refer to “Maintenance indicator” for details.


Bosch Rexroth 25TE Tank mounted return line filter

Feature

  • Filters for tank mounting and inline installation
  • Special highly efficient filter media
  • Filtration of very fine particles and high dirt holding capacity across a broad pressure differential range
  • High collapse resistance of the filter elements
  • Optional equipment with different back pressureindicator
  • Bypass valve in the filter element
  • Filter element with integrated dirt retainer

Specification

General

Type / version25TE
Size0101020103511C051
Component series2X
Ambient temperature range 1)-10 … +65 °C
Storage conditionsNBR seal 2)-40 ... +65 °C
FKM seal 2)-20 ... +65 °C
Installation positionvertical
Filtration directionFrom the outside to the inside
Fatigue strength according to ISO 10771Load cycles> 10⁵ with max. operating pressure
MaterialFilter coverGrey cast ironDucCtile iron
Filter housingGrey cast ironDuctile iron
Bypass valvePlastic PA 6
SealsNBR / FKM
Weight3 kg5.8 kg12 kg21.5 kg
Volume0.5 l1 l2.5 l6.2 l
Surface requirementfor tank openingRoughness depthRz max.25 µm
FlatnesstE max.200 µm

1)short periods down to -30 °C
2)max. relative air humidity 65 %

Important information on hydraulic fluids!

  • For further 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 filter material are 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.

hydraulic

Type / version25TE
Size0101020103511051
Max. operating pressure25 bar
Cracking pressureBypass valve3 ±0.3 bar
Hydraulic fluid temperature range-10 … +100 °C
Minimum conductivity of the medium300 pS/m
Filtration directionFrom the outside to the inside

Compatibility with permitted hydraulic fluids

Hydraulic fluidClassificationSuitable sealing materialsSuitable adhesiveStandards
Mineral oilHLPNBRStandardDIN 51424
Bio-degradableInsoluble in waterHETGNBRVDMA 24568
HEESFKM
Soluble in waterHEPGFKMVDMA 24568
Flame-resistantWater-freeHFDU, HFDRFKMVDMA 24317
Containing waterHFASNBRDIN 24320
HFAENBR
HFCNBRVDMA 24317
SkydrolEPDMSpecial “H”

Important information on hydraulic fluids!

  • For further 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 filter material are 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.

Tightening torques

(Dimensions in mm)

Mounting filter cover

Series 25TE0101020103511051
Screw cover fasteningM5 x 20M8 x 20M10 x 25M16 x 25
Quantity4
Recommended property class of screw8.8
Tightening torque with μtotal = 0.14Nm6 ± 0,625 ± 2,550 ± 5,0150 ± 15

Tank mounting

Series 25TE0101020103511051
Tank mounting screwM5M6M8M12
Quantity4
Recommended property class of screw8.8
Tightening torque with μtotal = 0.14Nm7 ± 0,713 ± 1,318 ± 1,860 ± 6

Maintenance indicator

Series 25TE0101020103511051
Mechanical/visual maintenance indicatorNm30 ± 3
Electric maintenance indicator; brassNmmax. 40
Electric maintenance indicator;stainless steel ATEXNmmax. 70
Cubic connector screw M3 switching element EN-175301-803Nm0,5 ... 0,6
Threaded coupling for ventingNmmax. 40

Complete filter without maintenance indicator

Use/assignmentII 2GII 2D
AssignmentEx II 2G c IIC TXEx II 2D c IIC TX
Conductivity of the mediummin.300pS/m
Dust accumulationmax.-0.5 mm

Electronic maintenance indicator in the intrinsically safe electric circuit

Use/assignmentII 1GII 1D
AssignmentII 1GD Ex ia IIC TX°C X; II 1GD Ex ia IIIC TX°C X
Perm. intrinsically safe electric circuitEx ia IICEx ia IIIC
Switching voltage Uimax.20 V AC/DC
Switching current Iimax.200 mA
Switching power Pimax.1 W
Maximum surface temperature-100 °C 1)
Inner capacity Cineglectable
Inner inductivity Lineglectable
Dust accumulationmax.-0.5 mm

1)The temperature depends on the temperature of the medium in the filter and must not exceed the value specified here.

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