Simrit_Catalog_2007_Special_Sealing_Products

Packing Ring TFW made of PTFEPacking Ring TFW made of PTFEPacking Ring TFW made of PTFEMaterialSaddle ring Angled ring Mating ringPTFE on requestMetal (customer solution)→ Technical Manual.PTFE 15/F52902(graphite-filled PTFE))PTFE on requestMetal (customer solution)Operating conditionsFig. 1Merkel Packing Ring TFW made of PTFEPressureTemperature31,5 MPa –200 … +220 °CProduct descriptionV-shape sealing ring made of PTFE formaking up packings, comprising: 1 saddle ring TFS 3 to 5 angled rings TFW 1 mating ring TFG.Note:Only TFW rings are available from stock.Complete packings are only availableon request.Product advantagesPacking rings TFW feature very goodchemical and thermal resistance, low frictionand favourable breakaway forceseven after long periods of down-time.Running speed on axial movement on rotary movementContinuous operation approx. 0,5 m/s approx. 0,2 m/sIntermittent operation approx. 1,5 m/s approx. 0,4 m/sFitting & installationWith fluctuating operating temperaturesor when sealing a rotating shaft, thepacking is to be pre-loaded with 1,5 to2 N/mm 2 on the pressure side using aspring. If the spring must be installedon the non-pressurised side then its preloadis to be matched to the maximumWe recommend:pressure that occurs. If metal saddleand mating rings are manufactured bythe customer, the dimensions are to betaken from the table. The number of PTFEangled rings depends on the pressure ofthe medium.p ≤3 MPa p >3 … 10 MPa p >10 MPa3 TFW 4 TFW 5 TFWApplicationPacking rings TFW are suitable for axiallyoperated valve spindles, rods andplungers, as well as slowly turning shafts.224© Freudenberg Simrit GmbH & Co. KG | Special Sealing Products Catalog 2007