Return-line safeguards
fluid cleanliness

Application:

Hydraulic Return Line Filters are used on the return-side of the hydraulic circuit, where the oil re-enters the tank-reservoir.
Return Filters play a critical role in the hydraulic system by ensuring that the fluid is kept free from solid contaminants, generated by deterioration of system components, that enter the oil reservoir and ultimately return to the system through the suction lines.
In addition to filtering the fluid, the return line filter serves other functions: they ensure a smooth flow of the fluid in a hydraulic system and protect the system with the aim of further extending the  system and fluid life.
This type of filter should be sized for the maximum flow of the hydraulic system.

User Benefits:

  • Several types of layout (tank-top, tank-insert, in-line) according to the application and the available space for assembly
  • Ease of maintenance and filter element replacement
  • Different accessories available, like in built-in air breathers, filling plugs, dipsticks, diffusor and magnetic core
  • Integral filter element by-pass valves option
  • Increased life of system components and lower maintenance costs
  • Higher machine utilisation with less down time

GRF

Ecofriendly in-out tank top return filter

Materials

Head and cover: Aluminum alloy
Diffusor: Zinc plated steel
Element support: Aluminum alloy
Magnetic core: Syntherized magnetic
material Seals: NBR Nitrile (FKM Fluoroelastomer on request)
Indicator housing: Brass

Pressure

Max. working: 1 MPa (10 bar) Collapse, differential for the filter element (ISO 2941): 1 MPa (10 bar)

BYPASS VALVE

Setting: 170 kPa (1,7 bar) ± 10%

Flow rate

Qmax 1200 l/min

Working temperature

From -25° to +110° C

Compability (ISO 2943)

Full with fluids: HH-HL-HM-HV-HTG (according to ISO 6743/4) For fluids different than the above mentioned, please contact our Customer Service.
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FRA – RFM

Tank Top Return Line Filter

Materials

Head and cover : Aluminum alloy

Bowl :
Polyamide for FRA21-31-32-33-41
Zinc plated steel for FRA11-42-51-52- 53-5D

Bypass valve: Polyamide

Seals: NBR Nitrile (FKM Fluoroelastomer on request)

Indicator housing: Brass

Pressure

Max. working: 300 kPa (3 bar)

Collapse, differential for the filter element (ISO 2941): 300 kPa (3 bar)

Bypass valve

Setting: 170 kPa (1,7 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 700 l/min

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FRB – RFA

Tank top return line filter, inbuilt breather

Materials

Head : Aluminum alloy

Cover and Bowl: Polyamide

Bypass valve: Polyamide

Seals: NBR Nitrile

Indicator housing: Brass

Pressure

Max. working: 700 kPa (7 bar)

Collapse, differential for the filter element (ISO 2941): 300 kPa (3 bar)

Bypass valve

Setting: 170 kPa (1,7 bar) ± 10%

250 kPa (2,5 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 140 l/min

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FRC – MAR

Tank top return spin-on filter

Materials

Head : Aluminum alloy

Spin-on cartridge: Steel

Bypass valve: Polyamide

Seals: NBR Nitrile

Indicator housing: Brass

Pressure

Max. working: 700 kPa (7 bar)

Collapse, differential for the filter element (ISO 2941): 300 kPa (3 bar)

Bypass valve

Setting: 170 kPa (1,7 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 200 l/min

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FRD – MRH

Tank top or external mounting return line filter

Materials

Cover & housing: Anodized aluminum alloy

For 61&62 only, Cover: Anodized aluminum alloy

Housing: Steel

Bypass valve: Steel

Seals: NBR Nitrile (FKM Fluoroelastomer on request )

Indicator housing: Brass

Pressure

Max. working: 2 MPa (20 bar)

Collapse, differential for the filter element (ISO 2941): 1 MPa (10 bar)

Bypass valve

Setting: 300 kPa (3 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 1500 l/min

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FRF – RFC

In-out tank top return line filter

Materials

Head and cover: Aluminum alloy

Diffusor: Zinc plated steel

Element support:
Polyamide (aluminum alloy for FRF3+ and FRF4+)

Magnetic core: Syntherized magnetic material

Seals: NBR Nitrile (FKM Fluoroelastomer on request)

Indicator housing: Brass

Pressure

Max. working: 1 MPa (10 bar)

Collapse, differential for the filter element (ISO 2941): 1 MPa (10 bar)

Bypass valve

Setting: 150 kPa (1,5 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 2200 l/min

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FRG – RSC

Tank insert return line filter, inside to outside filtration

Materials

Diffusor: Zinc plated steel

Element support: Polyamide (aluminum alloy for FRG3+ & FRG4+)

Magnetic core: Syntherized magnetic material

Seals: NBR Nitrile

FKM Fluoroelastomer on request

Pressure

Collapse, differential for the filter element (ISO 2941): 1 MPa (10 bar)

Bypass valve

Setting: 150 kPa (1,5 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 2400 l/min

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FRH

Tank top return filter

Materials

Head and cover: Aluminum alloy

Bowl: Polyamide

Bypass valve: PolyaqMAmide

Seals: NBR Nitrile

FKM Fluoroelastomer on request

Indicator housing: Brass

Pressure

Max working: 300 kPa (3 bar)

Collapse, differential for the filter element (ISO 2941): 300 kPa (3 bar)

Bypass valve

Setting: 170 kPa (1,7 bar) ± 10%

Working temperature

From -25° to +110° C

Flowrate

Qmax 200 l/min

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