Bosch Rexroth 25TE Tank mounted return line filter

Bosch Rexroth 25TE0101 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.

Rexroth 25TE0101 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 / version 25TE
Size 0101 0201 0351 1C051
Component series 2X
Ambient temperature range 1) -10 … +65 °C
Storage conditions NBR seal 2) -40 … +65 °C
FKM seal 2) -20 … +65 °C
Installation position vertical
Filtration direction From the outside to the inside
Fatigue strength according to ISO 10771 Load cycles > 10⁵ with max. operating pressure
Material Filter cover Grey cast iron DucCtile iron
Filter housing Grey cast iron Ductile iron
Bypass valve Plastic PA 6
Seals NBR / FKM
Weight 3 kg 5.8 kg 12 kg 21.5 kg
Volume 0.5 l 1 l 2.5 l 6.2 l
Surface requirementfor tank opening Roughness depth Rz max. 25 µm
Flatness tE 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 / version 25TE
Size 0101 0201 0351 1051
Max. operating pressure 25 bar
Cracking pressure Bypass valve 3 ±0.3 bar
Hydraulic fluid temperature range -10 … +100 °C
Minimum conductivity of the medium 300 pS/m
Filtration direction From the outside to the inside

Compatibility with permitted hydraulic fluids

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”

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 25TE 0101 0201 0351 1051
Screw cover fastening M5 x 20 M8 x 20 M10 x 25 M16 x 25
Quantity 4
Recommended property class of screw 8.8
Tightening torque with μtotal = 0.14 Nm 6 ± 0,6 25 ± 2,5 50 ± 5,0 150 ± 15

Tank mounting

Series 25TE 0101 0201 0351 1051
Tank mounting screw M5 M6 M8 M12
Quantity 4
Recommended property class of screw 8.8
Tightening torque with μtotal = 0.14 Nm 7 ± 0,7 13 ± 1,3 18 ± 1,8 60 ± 6

Maintenance indicator

Series 25TE 0101 0201 0351 1051
Mechanical/visual maintenance indicator Nm 30 ± 3
Electric maintenance indicator; brass Nm max. 40
Electric maintenance indicator;stainless steel ATEX Nm max. 70
Cubic connector screw M3 switching element EN-175301-803 Nm 0,5 … 0,6
Threaded coupling for venting Nm max. 40

Complete filter without maintenance indicator

Use/assignment II 2G II 2D
Assignment Ex II 2G c IIC TX Ex II 2D c IIC TX
Conductivity of the medium min. 300pS/m
Dust accumulation max. 0.5 mm

Electronic maintenance indicator in the intrinsically safe electric circuit

Use/assignment II 1G II 1D
Assignment II 1GD Ex ia IIC TX°C X; II 1GD Ex ia IIIC TX°C X
Perm. intrinsically safe electric circuit Ex ia IIC Ex ia IIIC
Switching voltage Ui max. 20 V AC/DC
Switching current Ii max. 200 mA
Switching power Pi max. 1 W
Maximum surface temperature 100 °C 1)
Inner capacity Ci neglectable
Inner inductivity Li neglectable
Dust accumulation max. 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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