Off-line Filters FN 6 FN In-line mounting Operating pressure up to bar / 74 psi Nominal flow rate up to 65 l/min / 7 gpm Description Application Return-flow filter or off-line filter in hydraulic and lubrication systems. Performance features Protection against wear: The EXAPOR MAX Ultra-Fine element meets the highest cleanliness standards, even at full flow. Protection against failure: The off-line filter includes a feature that guarantees a closed by-pass valve even at ν mm /s / 9 SUS (cold start condition) within specified operating parameters. Special design features Housing cover: The cover of the FN 6 can be opened without special auxiliary tools. Fold-out handle parts at the cover of the FN facilitate the opening. Off-line Filter FN 6 Automatic ventilation valve (only FN ): The quick automatic de-areation after commissioning not only prevents components from consequential damage due to an excessive air content, but also avoids errors in the monitoring with optical particle counters. Dirt retention valve: At the bottom of the filter element, flown through from inside to outside, there is a dirt retention valve. This closes while pulling the filter element, which is hung up at the cover, out of the housing. Sedimented dirt is removed together with the filter element. Because of the cover design, filter element change can be carried out almost without losing any oil. Filter elements Flow direction from inside to outside. The star-shaped pleating of the filter material results in: large filter surfaces low pressure drop high dirt-holding capacities particularly long maintenance intervals Filter maintenance By using a clogging indicator, the correct moment for maintenance is stated, what guarantees optimum utilization of the filter life. Off-line Filter FN Page
Materials: Filter head: Aluminium alloy Filter housing: Steel (FN 6) Aluminium alloy (FN ) Cover: Aluminium alloy Seals: NBR (FPM on request) Filter media: EXAPOR MAX - inorganic, multi-layer microfibre web Accessories Water-absorbing filter elements EXAPOR AQUA are available on request. For FN 6 there is a bleeder screw, and with Part No. FNS 6.7 a fastening kit available on request. Electrical and / or optical clogging indicators are available on request with either one or two switching points resp. temperature suppression. Dimensions and technical data of the clogging indicators see catalogue sheet 6.. Characteristics Operating pressure Max. bar / 74 psi (FN 6) Max. bar / 45 psi (FN ) Nominal flow rate Up to 65 l/min / 7 gpm (see Selection Chart, column ) The nominal flow rates indicated by ARGO-HYTOS are based on the following features: closed by-pass valve at ν mm /s / 9 SUS element service life > operating hours at an average fluid contamination of.7 g per l/min /.7 g per gpm flow volume flow velocity in the connection lines: up to bar 4.5 m/s / 45 psi 4.8 ft/s Filter fineness µm(c)... µm(c) β-values according to ISO 6889 (see Selection Chart, column 4 and Diagram Dx) Dirt-holding capacity The dirt-holding capacity values in grams from the ISO MTD test dust are in accordance with the ISO 6889 requirements (see Selection Chart, column 5). Hydraulic fluids Mineral oil and biodegradable fluids (HEES and HETG, see info-sheet.) Temperature range - C... + C (temporary -4 C... + C) - F... + F (temporary -4 F... +48 F) Viscosity at nominal flow rate at operating temperature:ν < 5 mm /s / 6 SUS as starting viscosity: ν max = mm /s / 556 SUS at initial operation: The recommended starting viscosity can be read from the diagram D (pressure drop as a function of the kinematic viscosity) as follows: Find the 7 % p of the cracking pressure of the by-pass valve on the vertical axis. Draw a horizontal line so that it intersects the p curve at a point. Read this point on the horizontal axis for the viscosity. Mounting position Vertical, connection port at the bottom Connection Threaded ports according to ISO 8 or DIN (FN 6) or flange mounting according to SAE-J58 (FN ). Sizes see Selection Chart, column 6 (other port threads on request). Page 4
Diagrams p-curves for complete filters in Selection Chart, column D Pressure drop as a function of the flow volume at ν = 5 mm /s / 6 SUS ( = casing empty) Pressure drop as a function of the kinematic viscosity at nominal flow p [bar / psi] D p [bar / psi], (4.5),8 (.6),6 (8.7),4 (5.8), (.9) FN 6 5 (.) (6.4) 5 (9.6) Q [l/min / gpm] Pressure drop as a function of the flow volume at ν = 5 mm /s / 6 SUS ( = casing empty), (4.5),8 (.6),6 (8.7),4 (5.8), (.9) FN (6.4) (5.8) (79.) 4 (5.7) 5 (.) Q [l/min / gpm] (5.8) 6 (58.5) p [bar / psi] p [bar / psi] 5 (7.5) 4 (58.) (4.5) (9.) (4.5) (9) 4 (86) 6 8 (79) (7) ν [mm /s / SUS] Pressure drop as a function of the kinematic viscosity at nominal flow 5 (7.5) 4 (58.) (4.5) (9.) (4.5) (9) 4 (86) 6 (79) 8 (7) ν [mm /s / SUS] (465) (465) Filter fineness curves in Selection Chart, column 4 Dx Filtration ratio β as a function of particle size x obtained by the Multi-Pass Test according to ISO 6889 The abbreviations represent the following β-values resp. finenesses: Filtration ratio β for particles > x µm Efficiency [%] With EXAPOR MAX and paper elements: EN = β (c) = EXAPOR MAX 5EN = β 5 (c) = EXAPOR MAX EX = β (c) = EXAPOR MAX For special applications, finenesses differing from these curves are also available by using special composed filter media. Particle size x [µm] (for particles larger than the given particle size x) Page 5
Selection Chart Part No. Nominal flow rate Dirt-holding capacity Filter fineness s. diagram Dx Connection A/B Cracking pressure of by-pass Symbol Replacement filter element Part No. l/min gpm g bar psi kg lbs Weight Clogging indicator 4 5 6 7 8 9 FN 6-9 6 5.9 EN 9 G.5 5 V7.-5 5. DG 4- Remarks FN 6-7 5.4 5EN G.5 5 V7.-5 5. optional FN -6 5 66. EN 74 SAE½.5 5 V7.56-44. optional * FN -5 79. 5EN 6 SAE½.5 5 V7.56-44. optional * FN -56 65 7.7 EX 4 SAE½.5 5 V7.56-6 44. optional * * with automatic ventilation valve Optical or electrical indicators are available to monitor the clogging condition of the element. For the appropriate clogging indicators see catalogue sheet 6.. Remarks: The response / switching pressure of the clogging indicator must be lower than the cracking pressure of the by-pass valve (see Selection Chart, column 7). Clogging indicators are optionally available and will be supplied separately, if ordered. The filter units listed in this chart are standard units. If modifications are required, e.g. with water-absorbing filter elements or with mounting set, we kindly ask for your request. Page 6
Dimensions R Minimum distance for filter maintenance B Fastening screw thread 4 x M8-8 mm deep U P P P M L V ØD A C R F G Minimum distance for filter maintenance For use of SAE-flanges consider size H ØD Fastening kit on request ARGO-HYTOS Part No. FNS 6.7 C Clogging indicator E H M I V S F L K Fastening screw thread 4 x M8-6 mm deep K optional Pressure holes plugged with screws M4 B T Ventilation valve T E V U ØF B S N U O A Measurements in mm Type A / B C D E F G H I K L M N O P R S T U V FN 6 G 4 4 6 6 7 66 9 56.5 9.5 4 4 FN SAE ½ 775 6 6 45 96 5 4 5.8 95 97.5 7 88.9 7 65 6 Measurements in inch Type A / B C D E F G H I K L M N O P R S T U V FN 6 G 6.4 5.5.48 5.5 6.69 -.6.5.47. - -.7.8.9.6.4.8 FN SAE ½.5 6. 4.96 7.87 -.77.78.98.57. 7.68.84-7.56.5 6.69 6.5.48 Page 7
Symbols Quality Assurance Quality management according to DIN EN ISO 9 To ensure constant quality in production and operation, ARGO-HYTOS filter elements undergo strict controls and tests according to the following ISO standards: ISO 94 ISO 94 ISO 94 ISO 968 ISO 6889 ISO 8 Verification of collapse/burst pressure rating Verification of fabrication integrity (Bubble Point Test) Verification of material compatibility with fluids Evaluation of pressure drop versus flow characteristics Multi-Pass-Test (evaluation of filter fineness and dirt-holding capacity) Determination of resistance to flow fatigue using high viscosity fluid Various quality controls during the production process guarantee the leak-free function and solidity of our filters. Illustrations may sometimes differ from the original. ARGO-HYTOS is not responsible for any unintentional mistake in this specification sheet. Page 8