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RF

RF
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RF

Product catalog summary
Compatibility: The filters are designed to work with fluids HH, HL, HM, HV, and HTG according to ISO 6743/4. For compatibility with other fluids, consultation with the sales department is advised.
Working Temperature: The filters operate effectively within a temperature range of -25°C to +110°C.
Materials: The construction materials include aluminum alloy for the head and cover, zinc-plated steel for the diffuser, polyamide or aluminum alloy for the element support, sintered magnetic material for the magnetic core, and brass for the indicator housing. Seals are made from NBR Nitrile, with an option for FKM fluoro-elastomer upon request.
Pressure Specifications: As per ISO 10771-1:2002, the maximum working pressure is 1 MPa (10 bar), with a test pressure of 1.5 MPa (15 bar) and a bursting pressure of 3 MPa (30 bar). The collapse differential pressure for the filter element is 1 MPa (10 bar) according to ISO 2941.
Bypass Valve: The bypass valve is calibrated to 150 kPa (1.5 bar) with a tolerance of ±10%.
Application Example: Detailed installation drawings and specifications are provided for return filters, including single and double port configurations for models ranging from FRF11 to FRF44.
Ordering and Options: A detailed chart is available for ordering filters, specifying options for seals, port sizes, port types, filter media, and accessories. Options include different seal materials (NBR or FKM), port types (BSP, NPT, SAE), and filter media (cellulose, wire mesh, fiber).
Pressure Drop Curves: Pressure drop curves for clean filter elements with various media types are included. The assembly pressure drop should not exceed 50 kPa (0.5 bar). These curves are based on tests with mineral oil of specific viscosity and gravity, and adjustments may be necessary for different fluid characteristics.
Fluid Speed: When selecting filter size, the maximum recommended fluid speed should be considered, typically between 1.5 and 4 m/s in return lines.
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Catalog excerpts

RF-1

APPLICATION EXAMPLE Head & cover: Aluminium alloy Zinc plated steel Element support: Magnetic core: Syntherized magnetic material Indicator housing: Collapse, differential BYPASS VALVE WORKING TEMPERATURE Full with fluids: HH-HL-HM-HV-HTG For fluids different than the above mentio- ned, please contact our Sales Department.

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RF-3

RETURN FILTERS ORDERING AND OPTION CHART When the filter is ordered with FKM seals, the first digit of the indicator code is a letter FILTER ELEMENT

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RF-5

RETURN FILTERS ORDERING AND OPTION CHART FILTER ELEMENT

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RF-7

RETURN FILTERS ORDERING AND OPTION CHART When the filter is ordered with FKM seals, the first digit of the indicator code is a letter FILTER ELEMENT

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RF-9

RETURN FILTERS ORDERING AND OPTION CHART FILTER ELEMENT

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RF-10

RETURN FILTERS FLUID SPEED when selecting the filter size, we suggest to consider also the max recommended fluid speed (in return lines normally 1,5 < v < 4 m/s) PRESSURE DROP CURVES (Ap) The "Assembly Pressure Drop (Ap)" is obtained by adding the pressure drop values of the Filter Hou- sing and of the Clean Filter Element corresponding to the considered Flow Rate and it must be lower FILTER HOUSING PRESSURE DROP (mainly depending on the port size) BYPASS VALVE PRESSURE DROP When selecting the filter size, these curves must be taken into account if it is foreseen that any flow peak is to be absorbed...

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RF-11

R E T U R N F I LT E R S RF FLUID SPEED when selecting the filter size, we suggest to consider also the max recommended uid speed (in return lines normally 1,5 < v < 4 m/s) 500 450 Recommended range [l/min] 350 FLOW RATE 400 250 1,5 < v < 4 m/s 300 200 150 100 50 0 1 1/2” 1 1/2” PORT SIZE 2+ DIAGRAMS PRESSURE DROP CURVES (∆p) The “Assembly Pressure Drop (∆p)” is obtained by adding the pressure drop values of the Filter Housing and of the Clean Filter Element corresponding to the considered Flow Rate and it must be lower than 50 kPa (0,5 bar). CLEAN FILTER ELEMENT PRESSURE DROP WITH F+, C+ AND...

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RF-12

RETURN FILTERS FLUID SPEED when selecting the filter size, we suggest to consider also the max recommended fluid speed (in return lines normally 1,5 < v < 4 m/s) PRESSURE DROP CURVES (Ap) The "Assembly Pressure Drop (Ap)" is obtained by adding the pressure drop values of the Filter Hou- sing and of the Clean Filter Element corresponding to the considered Flow Rate and it must be lower FILTER HOUSING PRESSURE DROP (mainly depending on the port size) BYPASS VALVE PRESSURE DROP When selecting the filter size, these curves must be taken into account if it is foreseen that any flow peak is to be absorbed...

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RF-13

RF R E T U R N F I LT E R S 2000 1900 1800 1700 1600 1500 1400 1300 1200 1100 1000 900 800 700 600 500 400 300 200 100 0 Recommended range 1,5 < v < 4 m/s FLOW RATE [l/min] FLUID SPEED when selecting the filter size, we suggest to consider also the max recommended uid speed (in return lines normally 1,5 < v < 4 m/s) 3” 4” PORT SIZE CLEAN FILTER ELEMENT PRESSURE DROP WITH F+, C+ AND ME MEDIA (depending both on the internal diameter of the element and on the filter media) 4+ DIAGRAMS PRESSURE DROP CURVES (∆p) The “Assembly Pressure Drop (∆p)” is obtained by adding the pressure drop values of the...

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RF-14

CLOGGING INDICATOR A visual or differential indicator (dif- ferential indicator with thermostat is an available option) allows moni- toring of the element condition and provides maximum element life by indicating the exact time for the ele- ment replacement. The port for the indicator is a standard feature. CLOGGING INDICATOR For further technical informations and other options see page 184-185. MAGNETIC CORE The magnetic core (available as an option) ensures a magnetic pre- filtration of ferrous particles, even during bypass conditions. The diffusor (available as an option) smooths the oil flow...

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.