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Choose from Our Range of Products

TG680

EagleBurgmann MFL WT80 Series Replacement

TG680 Seres mechanical seal featurng welded metal bellowsstatic seal,The bellows adopts advanced welding technology.45°C wave design, which makes the stress distribution morereasonable and flexibility, to ensure seals has advantages of reliable sealing and good matching property. The Type 680incorporates drive lugs under the bellows that provide addedrotational drve, This reduces torsional stress on the bellowsand makes the Type 680 the ideal seal for maximum reliability and and extended life in viscous or high-temperature applications.The seal has excellent dynamic performance and has a wide range of applications.
Features
 Drive lugs
  Welded metal bellows
  Bi-dire ctional
  Balanced
  Flexible graphite auxiliary seal
  Available with DOUBLE-PLY Bellows
  TG680 seal, equivalent to Type MFL WT80
Operating range
Shaft diameter:  d1=16...100mm
Pressure: p=0...2.5Mpa(362.5psi)
Temperature:  t = -75 °C ...400 °C(-103°F to 752°F)-TG680M
                       t = -40 °C ...290 °C(-40°F to 554°F)-TG680C
                       t = -20 °C ...200 °C(-4°F to 428°F)-TG680T
Sliding velocity:   Vg≤25m/s(or Vg≤5,000rpm)(82ft/m)
Notes: The range of preesure,temperature and sliding velocity is depend on seals combination materials
Product Structure

Combination Materials
1.BELLOWS
    AM350  T8            Hastelloy C-276  M5             inconel 718  M6
2.SEAL FACE
    Carbon graphite  A        Sintered Silicon  O1        Sintered Silicon    O1  
    antimony impreg                  Carbide SSlC                Carbide SSIC
3.AUXILIARY SEAL
   Flexible Graphite  G            Flexible Graphite  G          Flexible Graphite  G
4.ROTARY HEAD
    All0y 42  T4                   Hastelloy C-276  M5               All0y 42  T4
5.METAL PATRTS
    CrNiMo-steel  G            Hastelloy C-276  M5                All0y 625  T3
6.APPLICATION
   Mildly corrosive medium      Corrosive medium           Corrosive medium

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