Merkel Guide Ring EKF

Rod SealsMerkel Guide Ring EKFMerkel Guide Ring EKFPiston SealsProduct descriptionSlit, non-metallic pistonguide ring.Product advantagesNon-metallic guide elementfor pistons.ApplicationStandard cylinders, mobilehydraulics, injection mouldingmachines.WipersGuidesMaterialMaterialDesignationPolyamide PA 4201Rotary SealsRotor SealsOperating conditionsLoading: ≤50 N/mm² at 20 °C≤45 N/mm² at 100 °C(permitted specific surface pressure*)* For the simple determination of the loading aconstant surface pressure is calculated using theprojected area (D x H). The actual surfacepressure is clearly greater in the centre of thesurface than the calculated surface pressure.This is taken into account in the value for thepermissible specific surface pressure.Surface qualitySurfaceroughnessR aR maxSliding surface 0,05 … 0,3 mm ≤2,5 mmGroove base ≤2 mm ≤10 mmGroove flanks ≤3 mm ≤15 mmPercentage contact area M r >50% up to max. 90% at cutting depth c =Rz/2 and reference line C ref = 0%.Material PA 4201Temperature range in °CSymmetric SealsHydraulic oils HL, HLP –30 … +100HFA fluids +5 … +50HFB fluids +5 … +50HFC fluids –30 … +50HFD fluids –Water +5 … +50HETG (rapeseed oil) –30 … +60Static SealsHEES (synthetic esters) –30 … +80HEPG (glycol) –30 … +50Mineral greases –30 … +100Sliding speed v in m/s 1Fitting Tools1© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG

Merkel Guide Ring EKFRod SealsDesign notesPlease observe our general design notes in → Simrit Standard Catalogue, Merkel Hydraulics –Technical Principles.Tolerance recommendationPiston SealsD 1 d F d F1H8 h8 h9The tolerances give are recommended values. The usage of the guide and tolerance definition are to be considered in relation to the seal employed.The diameter d F1 given in the table of dimensions is to be considered exclusively in relation to the guide ring. The corresponding diameter for theadjacent seal housing is to be matched to the sealing component. → Simrit Standard Catalogue, Merkel Hydraulics – Technical Principles.Fitting & installationGuide rings EKF can be easily snapped into the housing groove. Careful fitting is a prerequisite forcorrect function. → Simrit Standard Catalogue, Merkel Hydraulics – Technical Principles.WipersStatic SealsSymmetric SealsRotor SealsRotary SealsGuides© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG2Fitting Tools

Rod SealsMerkel Guide Ring EKFArticle listPiston SealsHL +0, 2R < = 0,21Wipersd F1D d F∅ ∅ ∅GuidesD d F L H d F1 Article No.20 16 8,2 8 19,4 9421525 21 8,2 8 24,4 9966430 26 8,2 8 29,4 9966532 28 8,2 8 31,4 9404435 31 8,2 8 34,4 1264Rotary Seals40 36 8,2 8 39,4 9942245 41 10,2 10 44,4 9419150 46 10,2 10 49,4 9942355 51 10,2 10 54,4 9942458 54 10,2 10 57,4 9529060 56 10,2 10 59,4 9937563 59 10,2 10 62,4 99861Rotor Seals65 61 10,2 10 64,4 9936870 66 10,2 10 69,4 9973975 71 15,2 15 74,4 9419280 76 15,2 15 79,4 3402485 81 15,2 15 84,4 9933190 86 15,2 15 89,4 99426Symmetric Seals95 91 15,2 15 94,4 94193100 96 15,2 15 99,4 99376105 101 20,3 20 104,4 27257110 106 20,3 20 109,4 99864115 111 20,3 20 114,4 94194120 116 20,3 20 119,4 99740125 121 20,3 20 124,4 99172Static Seals130 126 20,3 20 129,4 99863135 131 20,3 20 134,4 34301140 136 20,3 20 139,4 99425Fitting Tools3150 146 25,4 25 149,4 94201160 156 25,4 25 159,4 99862180 176 25,4 25 179,4 94204200 196 25,4 25 199,4 99963© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG

Merkel Guide Ring EKFRod SealsHL +0, 2Piston SealsR < = 0,21d F1D d F∅ ∅ ∅Static SealsGuidesSymmetric SealsRotor SealsRotary SealsWipersD d F L H d F1 Article No.220 216 30,5 30 219,4 95594250 246 30,5 30 249,4 94323Ordering exampleArticle No. Type D d F H Material94323 EKF 250 246 30 Polyamide© 2006 Merkel Freudenberg Fluidtechnic GmbH, © 2006 Freudenberg Simrit GmbH & Co. KG4Fitting Tools